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Artigos de revistas sobre o tema "Sea ice advance"

Autor: Grafiati

Publicado: 20 de julho de 2024

Última modificação: 31 de julho de 2025

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1

Stern, Harry L., and Kristin L. Laidre. "Sea-ice indicators of polar bear habitat." Cryosphere 10, no. 5 (2016): 2027–41. http://dx.doi.org/10.5194/tc-10-2027-2016.

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Abstract. Nineteen subpopulations of polar bears (Ursus maritimus) are found throughout the circumpolar Arctic, and in all regions they depend on sea ice as a platform for traveling, hunting, and breeding. Therefore polar bear phenology – the cycle of biological events – is linked to the timing of sea-ice retreat in spring and advance in fall. We analyzed the dates of sea-ice retreat and advance in all 19 polar bear subpopulation regions from 1979 to 2014, using daily sea-ice concentration data from satellite passive microwave instruments. We define the dates of sea-ice retreat and advance in

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Dial, Roman J., Colin T. Maher, Rebecca E. Hewitt, et al. "Arctic sea ice retreat fuels boreal forest advance." Science 383, no. 6685 (2024): 877–84. http://dx.doi.org/10.1126/science.adh2339.

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Climate-induced northward advance of boreal forest is expected to lessen albedo, alter carbon stocks, and replace tundra, but where and when this advance will occur remains largely unknown. Using data from 19 sites across 22 degrees of longitude along the tree line of northern Alaska, we show a stronger temporal correlation of tree ring growth with open water uncovered by retreating Arctic sea ice than with air temperature. Spatially, our results suggest that tree growth, recruitment, and range expansion are causally linked to open water through associated warmer temperatures, deeper snowpacks

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Post, Eric, Jeffrey Kerby, Christian Pedersen, and Heidi Steltzer. "Highly individualistic rates of plant phenological advance associated with arctic sea ice dynamics." Biology Letters 12, no. 12 (2016): 20160332. http://dx.doi.org/10.1098/rsbl.2016.0332.

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We analysed 12 years of species-specific emergence dates of plants at a Low-Arctic site near Kangerlussuaq, Greenland to investigate associations with sea ice dynamics, a potential contributor to local temperature variation in near-coastal tundra. Species displayed highly variable rates of phenological advance, from a maximum of −2.55 ± 0.17 and −2.93 ± 0.51 d yr −1 among a graminoid and forb, respectively, to a minimum of −0.55 ± 0.19 d yr −1 or no advance at all in the two deciduous shrub species. Monthly Arctic-wide sea ice extent was a significant predictor of emergence timing in 10 of 14

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Nakanowatari, Takuya, Jun Inoue, Jinlun Zhang, Eiji Watanabe, and Hiroshi Kuroda. "A New Norm for Seasonal Sea Ice Advance Predictability in the Chukchi Sea: Rising Influence of Ocean Heat Advection." Journal of Climate 35, no. 9 (2022): 2723–40. http://dx.doi.org/10.1175/jcli-d-21-0425.1.

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Abstract Predictability of seasonal sea ice advance in the Chukchi Sea has been investigated in the context of ocean heat transport from the Bering Strait; however, the underlying physical processes have yet to be fully clarified. Using the Pan-Arctic Ice–Ocean Modeling and Assimilation System (PIOMAS) reanalysis product (1979–2016), we examined seasonal predictability of sea ice advance in early winter (November–December) and its source using canonical correlation analysis. It was found that 2-month leading (September–October) surface heat flux and ocean heat advection is the major predictor

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Liang, Hongjie, and Wen Zhou. "Dynamic and thermodynamic processes related to sea-ice surface melt advance in the Laptev Sea and East Siberian Sea." Cryosphere 18, no. 8 (2024): 3559–69. http://dx.doi.org/10.5194/tc-18-3559-2024.

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Abstract. Arctic summer sea ice has shrunk considerably in recent decades. This study investigates springtime sea-ice surface melt onset in the Laptev Sea and East Siberian Sea, which are key seas along the Northeast Passage. Instead of region-mean melt onset, we define an index of melt advance, which is the areal percentage of a sea that has experienced sea-ice surface melting before the end of May. Four representative scenarios of melt advance in the region are identified. Each scenario is accompanied by a combination of distinct patterns between atmospheric circulation, atmospheric thermody

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Schroeter, Serena, Will Hobbs, and Nathaniel L. Bindoff. "Interactions between Antarctic sea ice and large-scale atmospheric modes in CMIP5 models." Cryosphere 11, no. 2 (2017): 789–803. http://dx.doi.org/10.5194/tc-11-789-2017.

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Abstract. The response of Antarctic sea ice to large-scale patterns of atmospheric variability varies according to sea ice sector and season. In this study, interannual atmosphere–sea ice interactions were explored using observations and reanalysis data, and compared with simulated interactions by models in the Coupled Model Intercomparison Project Phase 5 (CMIP5). Simulated relationships between atmospheric variability and sea ice variability generally reproduced the observed relationships, though more closely during the season of sea ice advance than the season of sea ice retreat. Atmospheri

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Ma¨a¨tta¨nen, Mauri. "Advance in Ice Mechanics in Finland." Applied Mechanics Reviews 40, no. 9 (1987): 1200–1207. http://dx.doi.org/10.1115/1.3149551.

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In Finland, 110 years of winter navigation has been a natural initiator of ice mechanics research. It has brought with it sea ice monitoring and statistics, ice forecasting, the testing of mechanical properties, ship and icebreaker model testing and full-scale trials, ice resistant aids-to-navigation, and theoretical modelling and numerical simulations. Lately, a lot of ice mechanics research has been devoted to arctic offshore applications. A summary of the major developments is given in this paper.

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Holland, Marika M., and Donald Perovich. "Sea Ice Summer Camp: Bringing Together Sea Ice Modelers and Observers to Advance Polar Science." Bulletin of the American Meteorological Society 98, no. 10 (2017): 2057–59. http://dx.doi.org/10.1175/bams-d-16-0229.1.

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Abstract Arctic sea ice has undergone significant change with large reductions in thickness and areal extent over the historical record. Numerical models project sea ice loss to continue for the foreseeable future, with the possibility of September ice-free conditions later this century. Understanding the mechanisms behind ice loss and its consequences for the larger Arctic and global systems is important if we are to anticipate and plan for the future. Meeting this challenge requires the collective and collaborative insights of scientists investigating the system from numerous perspectives. O

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Chu, P. C. "Air-Ice-Ocean Feedback Mechanisms and Ice Oscillation on Millennial Time Scales." Annals of Glaciology 14 (1990): 28–31. http://dx.doi.org/10.3189/s026030550000820x.

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Air-ice-ocean feedback mechanisms, which are not conventionally incorporated within either climate or glacial models, are investigated to illustrate their potential role in generating ice advance/retreat on the time scale of 103–104 years; i.e. for examining the internal causes for the ice oscillation.Three main feedback loops are found from a coupled air-ice-ocean model developed in this paper: (a) ice advance → lower air temperature → ice freezing → ice advance; and (b) ice advance → higher ocean temperature → ice melting → ice retreat; (c) ice advance/retreat → modification of evaporation r

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Chu, P. C. "Air-Ice-Ocean Feedback Mechanisms and Ice Oscillation on Millennial Time Scales." Annals of Glaciology 14 (1990): 28–31. http://dx.doi.org/10.1017/s026030550000820x.

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Air-ice-ocean feedback mechanisms, which are not conventionally incorporated within either climate or glacial models, are investigated to illustrate their potential role in generating ice advance/retreat on the time scale of 103–104 years; i.e. for examining the internal causes for the ice oscillation. Three main feedback loops are found from a coupled air-ice-ocean model developed in this paper: (a) ice advance → lower air temperature → ice freezing → ice advance; and (b) ice advance → higher ocean temperature → ice melting → ice retreat; (c) ice advance/retreat → modification of evaporation

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Lebrun, Marion, Martin Vancoppenolle, Gurvan Madec, and François Massonnet. "Arctic sea-ice-free season projected to extend into autumn." Cryosphere 13, no. 1 (2019): 79–96. http://dx.doi.org/10.5194/tc-13-79-2019.

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Abstract. The recent Arctic sea ice reduction comes with an increase in the ice-free season duration, with comparable contributions of earlier ice retreat and later advance. CMIP5 models all project that the trend towards later advance should progressively exceed and ultimately double the trend towards earlier retreat, causing the ice-free season to shift into autumn. We show that such a shift is a basic feature of the thermodynamic response of seasonal ice to warming. The detailed analysis of an idealised thermodynamic ice–ocean model stresses the role of two seasonal amplifying feedbacks. Th

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Turner, J., S. A. Harangozo, J. C. King, W. M. Connolley, T. A. Lachlan‐Cope, and G. J. Marshall. "An exceptional winter sea‐ice retreat/advance in the Bellingshausen sea, Antarctica." Atmosphere-Ocean 41, no. 2 (2003): 171–85. http://dx.doi.org/10.3137/ao.410205.

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Hodgson, Dominic A., Michael J. Bentley, Christoph Schnabel, et al. "Glacial geomorphology and cosmogenic 10Be and 26Al exposure ages in the northern Dufek Massif, Weddell Sea embayment, Antarctica." Antarctic Science 24, no. 4 (2012): 377–94. http://dx.doi.org/10.1017/s0954102012000016.

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AbstractWe studied the glacial geomorphology and geochronology of two ice-free valleys in the Dufek Massif (Antarctic Specially Protected Area 119) providing new constraints on past ice sheet thickness in the Weddell Sea embayment. 10Be and 26Al cosmogenic surface exposure dating provided chronological control. Seven glacial stages are proposed. These include an alpine glaciation, with subsequent (mid-Miocene?) over-riding by a warm-based ice sheet. Subsequent advances are marked by a series of minor drift deposits at 760 m altitude at > 1 Ma, followed by at least two later ice sheet advanc

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Grumbine, Robert W. "The thermodynamic predictability of sea ice." Journal of Glaciology 40, no. 135 (1994): 277–82. http://dx.doi.org/10.1017/s002214300000736x.

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AbstractStatistical analyses and model experiments suggest that the sea-ice cover is predictable weeks to months in advance. As such, it is one of the most highly predictable components of the climate system. The thermodynamic mechanisms by which this predictability can be realized are examined. It is found that the predictability is dependent on the differential growth/decay of sea ice as a function of thickness. In winter or year-round, for thin ice, the growth/decay rates are a strong function of thickness, which gives a relatively short period of predictability, though still long compared

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Grumbine, Robert W. "The thermodynamic predictability of sea ice." Journal of Glaciology 40, no. 135 (1994): 277–82. http://dx.doi.org/10.3189/s002214300000736x.

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AbstractStatistical analyses and model experiments suggest that the sea-ice cover is predictable weeks to months in advance. As such, it is one of the most highly predictable components of the climate system. The thermodynamic mechanisms by which this predictability can be realized are examined. It is found that the predictability is dependent on the differential growth/decay of sea ice as a function of thickness. In winter or year-round, for thin ice, the growth/decay rates are a strong function of thickness, which gives a relatively short period of predictability, though still long compared

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Lüthgens, Christopher, Jacob Hardt, and Margot Böse. "Proposing a new conceptual model for the reconstruction of ice dynamics in the SW sector of the Scandinavian Ice Sheet (SIS) based on the reinterpretation of published data and new evidence from optically stimulated luminescence (OSL) dating." E&G Quaternary Science Journal 69, no. 2 (2020): 201–23. http://dx.doi.org/10.5194/egqsj-69-201-2020.

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Abstract. We propose a new concept of the Weichselian ice dynamics in the south-western sector of the Baltic Sea depression. The review of existing geochronological data from Germany, Denmark and southernmost Sweden in combination with new optically stimulated luminescence (OSL) data from the German Oder Lobe area is the basis for a reassessment and an improvement of previous ice dynamic models. Factors like the pre-existing topography, glaciotectonic features and the occurrence of till beds and inter-till deposits of varying origin are also taken into consideration for our process-based recon

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17

Zhang, Yong-Fei, Cecilia M. Bitz, Jeffrey L. Anderson, et al. "Insights on Sea Ice Data Assimilation from Perfect Model Observing System Simulation Experiments." Journal of Climate 31, no. 15 (2018): 5911–26. http://dx.doi.org/10.1175/jcli-d-17-0904.1.

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Simulating Arctic sea ice conditions up to the present and predicting them several months in advance has high stakeholder value, yet remains challenging. Advanced data assimilation (DA) methods combine real observations with model forecasts to produce sea ice reanalyses and accurate initial conditions for sea ice prediction. This study introduces a sea ice DA framework for a sea ice model with a parameterization of the ice thickness distribution by resolving multiple thickness categories. Specifically, the Los Alamos Sea Ice Model, version 5 (CICE5), is integrated with the Data Assimilation Re

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Bernard, Kim S., Lacey A. Gunther, Sean H. Mahaffey, et al. "The contribution of ice algae to the winter energy budget of juvenile Antarctic krill in years with contrasting sea ice conditions." ICES Journal of Marine Science 76, no. 1 (2018): 206–16. http://dx.doi.org/10.1093/icesjms/fsy145.

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AbstractKrill overwintering strategies vary with ontogeny and year; understanding this variability is essential to predicting how the species will respond to climate change in the future. Overwintering studies have focused on larval and adult krill, but we know little about how juvenile krill overwinter. The late winter diet of juvenile krill is important because it will determine their growth and development rates and consequently their reproductive potential the following spring. A diet rich in ice algae would promote growth and reproductive development. The Bransfield Strait (northern Antar

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19

Gough, William A. "Reconstructing and Hindcasting Sea Ice Conditions in Hudson Bay Using a Thermal Variability Framework." Climate 12, no. 10 (2024): 165. http://dx.doi.org/10.3390/cli12100165.

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The Hudson Bay seasonal sea ice record has been well known since the advent of satellite reconnaissance, with a continuous record since 1971. To extend the record to earlier decades, a thermal variability framework is used with the surface temperature climatological records from four climate stations along the Hudson Bay shoreline: Churchill, Manitoba; Kuujjurapik, Quebec; Inukjuak, Quebec; and Coral Harbour, Nunavut. The day-to-day surface temperature variation for the minimum temperature of the day was found to be well correlated to the known seasonal sea ice distribution in the Bay. The sea

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Moen, M. A. N., A. P. Doulgeris, S. N. Anfinsen, et al. "Comparison of automatic segmentation of full polarimetric SAR sea ice images with manually drawn ice charts." Cryosphere Discussions 7, no. 3 (2013): 2595–634. http://dx.doi.org/10.5194/tcd-7-2595-2013.

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Abstract. In this paper we investigate the performance of an algorithm for automatic segmentation of full polarimetric, synthetic aperture radar (SAR) sea ice scenes. The algorithm uses statistical and polarimetric properties of the backscattered radar signals to segment the SAR image into a specified number of classes. This number was determined in advance from visual inspection of the SAR image and by available in-situ measurements. The segmentation result was then compared to ice charts drawn by ice service analysts. The comparison revealed big discrepancies between the charts of the analys

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England, John. "The late Quaternary history of Greely Fiord and its tributaries, west-central Ellesmere Island." Canadian Journal of Earth Sciences 27, no. 2 (1990): 255–70. http://dx.doi.org/10.1139/e90-025.

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Moraines and meltwater channels mark the limit of the last glaciation that interfingered with the sea around the perimeter of Greely Fiord and its tributaries. The extent of this ice advance was dictated predominantly by its proximity to the sea. Consequently, the large tidewater glaciers at the fiord heads today were so constrained by calving that they advanced only 5–10 km. Similarly, grounding-line deposits from widespread plateau ice caps also terminate just below marine limit. The most extensive outlet glaciers, which advanced 20–35 km beyond present margins, are simply those that had acc

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Ackley, S. F., S. Stammerjohn, T. Maksym, et al. "Sea-ice production and air/ice/ocean/biogeochemistry interactions in the Ross Sea during the PIPERS 2017 autumn field campaign." Annals of Glaciology 61, no. 82 (2020): 181–95. http://dx.doi.org/10.1017/aog.2020.31.

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AbstractThe Ross Sea is known for showing the greatest sea-ice increase, as observed globally, particularly from 1979 to 2015. However, corresponding changes in sea-ice thickness and production in the Ross Sea are not known, nor how these changes have impacted water masses, carbon fluxes, biogeochemical processes and availability of micronutrients. The PIPERS project sought to address these questions during an autumn ship campaign in 2017 and two spring airborne campaigns in 2016 and 2017. PIPERS used a multidisciplinary approach of manned and autonomous platforms to study the coupled air/ice/

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Peng, Ge, Michael Steele, Angela Bliss, Walter Meier, and Suzanne Dickinson. "Temporal Means and Variability of Arctic Sea Ice Melt and Freeze Season Climate Indicators Using a Satellite Climate Data Record." Remote Sensing 10, no. 9 (2018): 1328. http://dx.doi.org/10.3390/rs10091328.

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Information on the timing of Arctic snow and ice melt onset, sea ice opening, retreat, advance, and closing, can be beneficial to a variety of stakeholders. Sea ice modelers can use information on the evolution of the ice cover through the rest of the summer to improve their seasonal sea ice forecasts. The length of the open water season (as derived from retreat/advance dates) is important for human activities and for wildlife. Long-term averages and variability of these dates as climate indicators are beneficial to business strategic planning and climate monitoring. In this study, basic chara

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Yan, Qingyun, and Weimin Huang. "Sea Ice Remote Sensing Using GNSS-R: A Review." Remote Sensing 11, no. 21 (2019): 2565. http://dx.doi.org/10.3390/rs11212565.

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Knowledge of sea ice is critical for offshore oil and gas exploration, global shipping industries, and climate change studies. During recent decades, Global Navigation Satellite System-Reflectometry (GNSS-R) has evolved as an efficient tool for sea ice remote sensing. In particular, thanks to the availability of the TechDemoSat-1 (TDS-1) data over high-latitude regions, remote sensing of sea ice based on spaceborne GNSS-R has been rapidly growing. The goal of this paper is to provide a review of the state-of-the-art methods for sea ice remote sensing offered by the GNSS-R technique. In this re

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Howell, Stephen E. L., Randall K. Scharien, Jack Landy, and Mike Brady. "Spring melt pond fraction in the Canadian Arctic Archipelago predicted from RADARSAT-2." Cryosphere 14, no. 12 (2020): 4675–86. http://dx.doi.org/10.5194/tc-14-4675-2020.

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Abstract. Melt ponds form on the surface of Arctic sea ice during spring, influencing how much solar radiation is absorbed into the sea ice–ocean system, which in turn impacts the ablation of sea ice during the melt season. Accordingly, melt pond fraction (fp) has been shown to be a useful predictor of sea ice area during the summer months. Sea ice dynamic and thermodynamic processes operating within the narrow channels and inlets of the Canadian Arctic Archipelago (CAA) during the summer months are difficult for model simulations to accurately resolve. Additional information on fp variability

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Wen, Xiao, Zhenghao Liu, Mengzi Yang, and Ju Ding. "Numerical study of the brash ice effects on propeller performance with different advance speeds." Journal of Physics: Conference Series 2756, no. 1 (2024): 012040. http://dx.doi.org/10.1088/1742-6596/2756/1/012040.

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Abstract In this paper, the effects of brash ice on propeller performance with different advanced speeds are numerically analysed based on the CFD-DEM method. The results show that in the ice-water environment, the thrust and torque of the propeller oscillate violently due to the interaction between the ice and the propeller, and as the advanced speed increases, the oscillation becomes more and more intense. Moreover, under the blocking effect of sea ice, the average value of the thrust and torque of the propeller obviously increase and cause a large loss of propeller performance under high ad

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Kim, Stacy, Ben Saenz, Jeff Scanniello, Kendra Daly, and David Ainley. "Local climatology of fast ice in McMurdo Sound, Antarctica." Antarctic Science 30, no. 2 (2018): 125–42. http://dx.doi.org/10.1017/s0954102017000578.

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AbstractFast ice plays important physical and ecological roles: as a barrier to wind, waves and radiation, as both barrier and safe resting place for air-breathing animals, and as substrate for microbial communities. While sea ice has been monitored for decades using satellite imagery, high-resolution imagery sufficient to distinguish fast ice from mobile pack ice extends only back to c. 2000. Fast ice trends may differ from previously identified changes in regional sea ice distributions. To investigate effects of climate and human activities on fast ice dynamics in McMurdo Sound, Ross Sea, th

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Huybers, Kathleen, Gerard Roe, and Howard Conway. "Basal topographic controls on the stability of the West Antarctic ice sheet: lessons from Foundation Ice Stream." Annals of Glaciology 58, no. 75pt2 (2017): 193–98. http://dx.doi.org/10.1017/aog.2017.9.

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ABSTRACT Using observations of basal topography, ice thickness and modern accumulation rates, we use theory and a dynamic flowline model to examine the sensitivity of Antarctica's Foundation Ice Stream to changes in sea level, accumulation and buttressing at the grounding line. Our sensitivity studies demonstrate that the steep, upward-sloping basal topography inland from the grounding line serves to stabilize retreat of the ice stream, while the upward-sloping submarine topography downstream from the grounding line creates the potential for significant advance under conditions of modest sea-l

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Hodgson, Dominic A., Kelly Hogan, James M. Smith, et al. "Deglaciation and future stability of the Coats Land ice margin, Antarctica." Cryosphere 12, no. 7 (2018): 2383–99. http://dx.doi.org/10.5194/tc-12-2383-2018.

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Abstract. The East Antarctic Ice Sheet discharges into the Weddell Sea via the Coats Land ice margin. We have used geophysical data to determine the changing ice-sheet configuration in this region through its last glacial advance and Holocene retreat and to identify constraints on its future stability. Methods included high-resolution multibeam bathymetry, sub-bottom profiles, seismic-reflection profiles, sediment core analysis and satellite altimetry. These provide evidence that Coats Land glaciers and ice streams merged with the palaeo-Filchner Ice Stream during the last glacial advance. Ret

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Jacobs, S. S., D. R. Macayeal, and J. L. Ardai. "The Recent Advance of the Ross Ice Shelf Antarctica." Journal of Glaciology 32, no. 112 (1986): 464–74. http://dx.doi.org/10.1017/s0022143000012181.

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AbstractThe seaward edge of the Ross Ice Shelf advanced northward at a minimum average velocity of 0.8 km a–1between 1962 and 1985. That advance approximated velocities that have been obtained from glaciological data, indicating little recent wastage by iceberg calving. West of long. 178° E., the ice shelf has attained its most northerly position in the past 145 years, and has not experienced a major calving episode for at least 75 years. Since 1841 the ice-front position has advanced and retreated within a zone from about lat. 77° 10’S. (near long. 171° E.) to lat. 78° 40’ S. (near long. 164°

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Jacobs, S. S., D. R. Macayeal, and J. L. Ardai. "The Recent Advance of the Ross Ice Shelf Antarctica." Journal of Glaciology 32, no. 112 (1986): 464–74. http://dx.doi.org/10.3189/s0022143000012181.

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AbstractThe seaward edge of the Ross Ice Shelf advanced northward at a minimum average velocity of 0.8 km a–1 between 1962 and 1985. That advance approximated velocities that have been obtained from glaciological data, indicating little recent wastage by iceberg calving. West of long. 178° E., the ice shelf has attained its most northerly position in the past 145 years, and has not experienced a major calving episode for at least 75 years. Since 1841 the ice-front position has advanced and retreated within a zone from about lat. 77° 10’S. (near long. 171° E.) to lat. 78° 40’ S. (near long. 164

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Shabanov, Pavel, Alexander Osadchiev, Natalya Shabanova, and Stanislav Ogorodov. "Decline in Ice Coverage and Ice-Free Period Extension in the Kara and Laptev Seas during 1979–2022." Remote Sensing 16, no. 11 (2024): 1875. http://dx.doi.org/10.3390/rs16111875.

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The duration of ice-free periods in different parts of the Arctic Ocean plays a great role in processes in the climate system and defines the most comfortable sea ice conditions for economic activity. Based on satellite-derived sea ice concentration data acquired by passive microwave instruments, we identified the spatial distribution of the dates of sea ice retreat (DOR), dates of sea ice advance (DOA), and the resulting ice-free period duration (IFP) between these days for the Kara and Laptev seas during 1979–2022. The monthly decline in sea ice extent was detected from June to October in bo

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Moen, M. A. N., A. P. Doulgeris, S. N. Anfinsen, et al. "Comparison of feature based segmentation of full polarimetric SAR satellite sea ice images with manually drawn ice charts." Cryosphere 7, no. 6 (2013): 1693–705. http://dx.doi.org/10.5194/tc-7-1693-2013.

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Abstract. In this paper we investigate the performance of an algorithm for automatic segmentation of full polarimetric, synthetic aperture radar (SAR) sea ice scenes. The algorithm uses statistical and polarimetric properties of the backscattered radar signals to segment the SAR image into a specified number of classes. This number was determined in advance from visual inspection of the SAR image and by available in situ measurements. The segmentation result was then compared to ice charts drawn by ice service analysts. The comparison revealed big discrepancies between the charts of the analys

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Goosse, Hugues, Sofia Allende Contador, Cecilia M. Bitz, et al. "Modulation of the seasonal cycle of the Antarctic sea ice extent by sea ice processes and feedbacks with the ocean and the atmosphere." Cryosphere 17, no. 1 (2023): 407–25. http://dx.doi.org/10.5194/tc-17-407-2023.

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Abstract. The seasonal cycle of the Antarctic sea ice extent is strongly asymmetric, with a relatively slow increase after the summer minimum followed by a more rapid decrease after the winter maximum. This cycle is intimately linked to the seasonal cycle of the insolation received at the top of the atmosphere, but sea ice processes as well as the exchanges with the atmosphere and ocean may also play a role. To quantify these contributions, a series of idealized sensitivity experiments have been performed with an eddy-permitting (1/4∘) NEMO-LIM3 (Nucleus for European Modelling of the Ocean–Lou

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Syvitski, James P. M., and Dan B. Praeg. "Quaternary Sedimentation in the St. Lawrence Estuary and Adjoining Areas, Eastern Canada: An Overview Based on High-Resolution Seismo-Stratigraphy." Géographie physique et Quaternaire 43, no. 3 (2007): 291–310. http://dx.doi.org/10.7202/032784ar.

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ABSTRACT The regional Quaternary seismo-stratigraphy of NW Gulf of St. Lawrence, based on 5700 line km of high resolution seismic reflection profiles, is described. The Quaternary sequence can be locally missing or can exceed 1.3 km in thickness. Five major stratigraphic units are recognized, which vary in their character and distribution so that at any location a variety of bedrock types may be overlain by a distinctive Quaternary sequence. These units relate to the advance and retreat of the Late Wisconsinan Ice Sheet. We interpret these units as: Unit 1, recording the presence of grounded g

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Chevallier, Matthieu, and David Salas-Mélia. "The Role of Sea Ice Thickness Distribution in the Arctic Sea Ice Potential Predictability: A Diagnostic Approach with a Coupled GCM." Journal of Climate 25, no. 8 (2012): 3025–38. http://dx.doi.org/10.1175/jcli-d-11-00209.1.

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Abstract The intrinsic seasonal predictability of Arctic sea ice is investigated in a 400-yr-long preindustrial simulation performed with the Centre National de Recherches Météorologiques Coupled Global Climate Model, version 3.3 (CNRM-CM3.3). The skill of several predictors of the pan-Arctic sea ice area was quantified: the sea ice area itself, the pan-Arctic sea ice volume, and some areal predictors built from the subgrid ice thickness distribution (ITD). Sea ice area provides a potential predictability of about 3 months, which is consistent with previous studies using model and observation

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Briner, Jason P., and Darrell S. Kaufman. "Late Pleistocene Glaciation of the Southwestern Ahklun Mountains, Alaska." Quaternary Research 53, no. 1 (2000): 13–22. http://dx.doi.org/10.1006/qres.1999.2088.

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AbstractGlacial deposits in the southwestern Ahklun Mountains, southwestern Alaska, record two major glacier advances during the late Pleistocene. The Arolik Lake and Klak Creek glaciations took place during the early and late Wisconsin, respectively. During the Arolik Lake glaciation, outlet glaciers emanated from an ice cap centered over the central portion of the Ahklun Mountains and expanded beyond the present coast. During the Klak Creek glaciation, ice-cap outlet glaciers terminated ∼60 km upvalley from Arolik Lake moraines. The area also supported numerous alpine glaciers that expanded

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Kimura, Noriaki, and Masaaki Wakatsuchi. "Processes controlling the advance and retreat of sea ice in the Sea of Okhotsk." Journal of Geophysical Research: Oceans 104, no. C5 (1999): 11137–50. http://dx.doi.org/10.1029/1999jc900004.

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39

Bell, Trevor, Robert J. Rogerson, and Flemming Mengel. "Reconstructed ice-flow patterns and ice limits using drift pebble lithology, outer Nachvak Fiord, northern Labrador." Canadian Journal of Earth Sciences 26, no. 3 (1989): 577–90. http://dx.doi.org/10.1139/e89-049.

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The geology of outer Nachvak Fiord provides an opportunity to differentiate lithologies originating in the Churchill Structural Province (central and inner fiord) from those in the sedimentary Ramah Group and the Nain Structural Province (outer fiord). As a result, the distribution of glacial erratics from the central and inner fiord depicts the former presence of regional Laurentide ice in the outer fiord, whereas the distribution of glacial deposits characterized by locally derived lithologies delimits the area of local glacier expansion.Based upon these criteria, the suggestion is made that

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40

Phillips, F. "Glacial chronology of the Sierra Nevada, California, from the Last Glacial Maximum to the Holocene." Cuadernos de Investigación Geográfica 43, no. 2 (2017): 527. http://dx.doi.org/10.18172/cig.3233.

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During the Last Glacial Maximum the Sierra Nevada in California, USA, supported a mountain glacier/ice cap complex that covered over 20,000 km2. The history of this ice cover can be reconstructed using 14C and cosmogenic-nuclide surface-exposure dating. These show that the glaciers reached their maximum extent for the last glacial cycle between 21 and 18 ka, i.e., during the global Last Glacial Maximum. This is termed the Tioga 3 advance. A slow retreat began at 18 ka and accelerated rapidly at about 17 ka. After retreating an unknown distance, the glaciers began to readvance at about 16.7 ka,

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41

Quetin, Langdon B., Robin M. Ross, Christian H. Fritsen, and Maria Vernet. "Ecological responses of Antarctic krill to environmental variability: can we predict the future?" Antarctic Science 19, no. 2 (2007): 253–66. http://dx.doi.org/10.1017/s0954102007000363.

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AbstractAntarctic krill are a key species in the Southern Ocean ecosystem, and their life cycle appears to be correlated with, and by implication dependent upon, seasonal sea ice dynamics. Moving from correlations with environmental parameters to an understanding of the mechanisms that lead to these correlations may allow predictions of the consequences of climate change on the distribution of favourable habitat for Antarctic krill. During winter cruises in 2001 and 2002 in the region west of the Antarctic Peninsula, one of the most rapidly warming regions on the planet, ice camps were establi

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Easterbrook, Don J. "Advance and Retreat of Cordilleran Ice Sheets in Washington, U.S.A." Géographie physique et Quaternaire 46, no. 1 (2007): 51–68. http://dx.doi.org/10.7202/032888ar.

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ABSTRACT Cordilleran Ice Sheet glaciations show characteristic patterns of advance and retreat, consisting of (1) advance out outwash, (2) glacial scouring, (3) deposition of till, (4) deposition of recessional outwash south of Seattle in the southern Puget Lowland, glaciomarine drift in the northern lowland, and eskers, kames, and small moraines on the Columbia Plateau. Radiocarbon dates show that the Puget and Juan de Fuca lobes advanced and retreated synchronously. The Puget lobe backwasted to Seattle by 13.4-14 ka yrs BP, where the thinning ice floated in seawater northward to Canada by 13

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Lange, Manfred A., and Heinz Kohnen. "Ice Front Fluctuations in the Eastern and Southern Weddell Sea." Annals of Glaciology 6 (1985): 187–91. http://dx.doi.org/10.3189/1985aog6-1-187-191.

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We report new data on the position of ice edges in the eastern and southern Weddell Sea for the years 1983 and 1984. The data are derived from ship-borne radar measurements of individual points along the ice edge together with ship’s positions obtained by a satellite navigation system. They are accurate within 0.23 to 0.4 nm (426 - 741 m). Comparisons of ice shelf margins for the years 1980, 1983 and 1984 allow estimates of apparent ice advance rates during this period. Together with quantitative ice edge velocity estimates first conclusions about net changes along the ice front and the ablati

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Lange, Manfred A., and Heinz Kohnen. "Ice Front Fluctuations in the Eastern and Southern Weddell Sea." Annals of Glaciology 6 (1985): 187–91. http://dx.doi.org/10.1017/s0260305500010314.

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We report new data on the position of ice edges in the eastern and southern Weddell Sea for the years 1983 and 1984. The data are derived from ship-borne radar measurements of individual points along the ice edge together with ship’s positions obtained by a satellite navigation system. They are accurate within 0.23 to 0.4 nm (426 - 741 m). Comparisons of ice shelf margins for the years 1980, 1983 and 1984 allow estimates of apparent ice advance rates during this period. Together with quantitative ice edge velocity estimates first conclusions about net changes along the ice front and the ablati

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45

Glok, N. I., G. V. Alekseev, and A. E. Vyazilova. "Seasonal forecast of sea ice extent in the Barents sea." Arctic and Antarctic Research 65, no. 1 (2019): 5–14. http://dx.doi.org/10.30758/0555-2648-2019-65-1-5-14.

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Earlier, the authors established a close relationship between the temperature of water coming from the North Atlantic and the sea ice extent (SIE) in the Barents Sea, which accounts for up to 75 % of the inter-annual variability of the monthly SIE from January to June. In turn, temperature variations of the incoming Atlantic water are affected from anomalies of sea surface temperature (SST) in the low latitudes of the North Atlantic. These dependences served as the basis for the development of a forecast method. The empirical orthogonal functions decomposition of the SIE set from January to Ju

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46

Morioka, Yushi, Liping Zhang, Thomas L. Delworth, et al. "Multidecadal variability and predictability of Antarctic sea ice in the GFDL SPEAR_LO model." Cryosphere 17, no. 12 (2023): 5219–40. http://dx.doi.org/10.5194/tc-17-5219-2023.

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Abstract. Using a state-of-the-art coupled general circulation model, physical processes underlying Antarctic sea ice multidecadal variability and predictability are investigated. Our model simulations constrained by atmospheric reanalysis and observed sea surface temperature broadly capture a multidecadal variability in the observed sea ice extent (SIE) with a low sea ice state (late 1970s–1990s) and a high sea ice state (2000s–early 2010s), although the model overestimates the SIE decrease in the Weddell Sea around the 1980s. The low sea ice state is largely due to the deepening of the mixed

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Loose, B., W. R. McGillis, D. Perovich, C. J. Zappa, and P. Schlosser. "A parameter model of gas exchange for the seasonal sea ice zone." Ocean Science Discussions 10, no. 4 (2013): 1169–204. http://dx.doi.org/10.5194/osd-10-1169-2013.

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Abstract. Carbon budgets for the polar oceans require better constraint on air-sea gas exchange in the sea ice zone (SIZ). Here, we utilize recent advances in the theory of turbulence, mixing and air-sea flux in the ice-ocean boundary layer (IOBL) to formulate a simple model for gas exchange when the surface ocean is partially covered by sea ice. The gas transfer velocity (k) is related to shear-driven and convection-driven turbulence in the aqueous mass boundary layer, and to the mean-squared wave slope at the air–sea interface. We use the model to estimate k along the drift track of Ice-Teth

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Hodell, David A., Sharon L. Kanfoush, Aldo Shemesh, Xavier Crosta, Christopher D. Charles, and Thomas P. Guilderson. "Abrupt Cooling of Antarctic Surface Waters and Sea Ice Expansion in the South Atlantic Sector of the Southern Ocean at 5000 cal yr B.P." Quaternary Research 56, no. 2 (2001): 191–98. http://dx.doi.org/10.1006/qres.2001.2252.

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AbstractAntarctic surface waters were warm and ice free between 10,000 and 5000 cal yr B.P., as judged from ice-rafted debris and microfossils in a piston core at 53°S in the South Atlantic. This evidence shows that about 5000 cal yr B.P., sea surface temperatures cooled, sea ice advanced, and the delivery of ice-rafted detritus (IRD) to the subantarctic South Atlantic increased abruptly. These changes mark the end of the Hypsithermal and onset of Neoglacial conditions. They coincide with an early Neoglacial advance of mountain glaciers in South America and New Zealand between 5400 and 4900 ca

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Mudryk, Lawrence R., Chris Derksen, Stephen Howell, et al. "Canadian snow and sea ice: historical trends and projections." Cryosphere 12, no. 4 (2018): 1157–76. http://dx.doi.org/10.5194/tc-12-1157-2018.

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Abstract. The Canadian Sea Ice and Snow Evolution (CanSISE) Network is a climate research network focused on developing and applying state of the art observational data to advance dynamical prediction, projections, and understanding of seasonal snow cover and sea ice in Canada and the circumpolar Arctic. Here, we present an assessment from the CanSISE Network on trends in the historical record of snow cover (fraction, water equivalent) and sea ice (area, concentration, type, and thickness) across Canada. We also assess projected changes in snow cover and sea ice likely to occur by mid-century,

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Serreze, Mark C., Alex D. Crawford, Julienne C. Stroeve, Andrew P. Barrett, and Rebecca A. Woodgate. "Variability, trends, and predictability of seasonal sea ice retreat and advance in the Chukchi Sea." Journal of Geophysical Research: Oceans 121, no. 10 (2016): 7308–25. http://dx.doi.org/10.1002/2016jc011977.

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