Relevant bibliographies by topics / Mertz Drift

Academic literature on the topic 'Mertz Drift'

Author: Grafiati
Published: 10 December 2022
Last updated: 20 February 2023

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Journal articles on the topic "Mertz Drift"

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Lytle, V. I., A. P. Worby, R. Massom, M. J. Paget, I. Allison, X. Wu, and A. Roberts. "Ice formation in the Mertz Glacier polynya, East Antarctica, during winter." Annals of Glaciology 33 (2001): 368–72. http://dx.doi.org/10.3189/172756401781818464.

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AbstractDuring August 1999, detailed data were collected in the Mertz Glacier polynya along the coast of Antarctica on the drift of newly forming ice tracked with drifting buoys and the ice thickness in the vicinity of the buoys over time. Using these measurements, we estimate the ice-growth rate and the processes which are important in the early stages of ice formation. We find that although there is rapid frazil formation in the open-water areas near the coast and Mertz Glacier Tongue, this frazil ice can take several days to consolidate. A period of warmer weather, when temperatures reached as high as 0°C, delayed the consolidation of the frazil for > 4.5 days. The undeformed new-ice growth rate averaged about 4 cm d-1 for the first 5 days of formation. Ridging and rafting doubled the total growth rate to an average of 8 cm d-1. Blowing and falling snow was incorporated into the surface of the newly forming ice, with 16 of 22 ice cores having some snow in the top few centimeters.
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Massom, R. A., K. L. Hill, V. I. Lytle, A. P. Worby, M. J. Paget, and I. Allison. "Effects of regional fast-ice and iceberg distributions on the behaviour of the Mertz Glacier polynya, East Antarctica." Annals of Glaciology 33 (2001): 391–98. http://dx.doi.org/10.3189/172756401781818518.

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AbstractAn observational account of research carried out in July-August 1999 shows that grounded iceberg and related fast-ice distributions, and periodic "break-outs" of fast ice (in winter as well as at other times), have an important impact on the size and behaviour of the Mertz Glacier polynya, East Antarctica, and a smaller polynya to the east. Analysis of satellite and in situ data shows that a semi-constant "stream" of thick broken-out fast ice and other large floes from the east extends westwards from north of the glacier terminus to form a compact barrier to the net west-northwesterly export of ice formed in the polynya. An annual fast-ice promontory to the west further narrows the outlet path. As a result of this and high ice-production rates, the polynya periodically "back-fills", significantly reducing the open-water area present. Intervening "flush-outs" by synoptic storm events clear the polynya region to some extent before it back-fills again. This cycle continued from mid-March until early October in 1999, when a significant change in the regional ice drift occurred. A preliminary comparison with data from 1998 indicates that the timing and magnitude of the processes may vary interannually. Similar morphological features were also observed in 1963 (on a declassified photoreconnaissance satellite image).
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Harris, Peter T., and Robin J. Beaman. "Processes controlling the formation of the Mertz Drift, George Vth continental shelf, East Antarctica: evidence from 3.5kHz sub-bottom profiling and sediment cores." Deep Sea Research Part II: Topical Studies in Oceanography 50, no. 8-9 (May 2003): 1463–80. http://dx.doi.org/10.1016/s0967-0645(03)00070-5.

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Bradley, Stuart, and Alexander Strehz. "Corrections to sodar Doppler winds due to wind drift." Meteorologische Zeitschrift 24, no. 6 (November 5, 2015): 605–14. http://dx.doi.org/10.1127/metz/2014/0627.

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Pattantyús-Ábrahám, Margit, Christopher Kadow, Sebastian Illing, Wolfgang A. Müller, Holger Pohlmann, and Wolfgang Steinbrecht. "Bias and Drift of the Medium-Range Decadal Climate Prediction System (MiKlip) validated by European Radiosonde Data." Meteorologische Zeitschrift 25, no. 6 (December 21, 2016): 709–20. http://dx.doi.org/10.1127/metz/2016/0803.

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Mitroy, Jim. "The Momentum Transfer Cross Section for Krypton." Australian Journal of Physics 43, no. 1 (1990): 19. http://dx.doi.org/10.1071/ph900019.

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A form of modified effective range theory (MERT) has been used to analyse drift velocity data for both pure krypton and molecular hydrogen-krypton mixtures. The present momentum transfer cross section reproduces the data to within 4% for pure krypton and to within 1 �0% for the H2-Kr mixtures.
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Laref, Rachid, Etienne Losson, Alexandre Sava, and Maryam Siadat. "Empiric Unsupervised Drifts Correction Method of Electrochemical Sensors for in Field Nitrogen Dioxide Monitoring." Sensors 21, no. 11 (May 21, 2021): 3581. http://dx.doi.org/10.3390/s21113581.

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This paper investigates the long term drift phenomenon affecting electrochemical sensors used in real environmental conditions to monitor the nitrogen dioxide concentration [NO2]. Electrochemical sensors are low-cost gas sensors able to detect pollutant gas at part per billion level and may be employed to enhance the air quality monitoring networks. However, they suffer from many forms of drift caused by climatic parameter variations, interfering gases and aging. Therefore, they require frequent, expensive and time-consuming calibrations, which constitute the main obstacle to the exploitation of these kinds of sensors. This paper proposes an empirical, linear and unsupervised drift correction model, allowing to extend the time between two successive full calibrations. First, a calibration model is established based on multiple linear regression. The influence of the air temperature and humidity is considered. Then, a correction model is proposed to solve the drift related to age issue. The slope and the intercept of the correction model compensate the change over time of the sensors’ sensitivity and baseline, respectively. The parameters of the correction model are identified using particle swarm optimization (PSO). Data considered in this work are continuously collected onsite close to a highway crossing Metz City (France) during a period of 6 months (July to December 2018) covering almost all the climatic conditions in this region. Experimental results show that the suggested correction model allows maintaining an adequate [NO2] estimation accuracy for at least 3 consecutive months without needing any labeled data for the recalibration.
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Rignot, Eric. "Mass balance of East Antarctic glaciers and ice shelves from satellite data." Annals of Glaciology 34 (2002): 217–27. http://dx.doi.org/10.3189/172756402781817419.

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AbstractThe velocity and mass discharge of nine major East Antarctic glaciers not draining into the Ross or Filchner–Ronne Ice Shelves is investigated using interferometric synthetic aperture radar (InSAR) data from the European Remote-sensing Satellite 1and 2 (ERS-1/2) andRADARSAT-1. The glaciers are: David,Ninnis, Mertz, Totten, Scott, Denman, Lambert, Shirase and Stancomb-Wills. InSAR is used to locate their grounding line with precision. Ice velocity is measured with either InSAR or a speckle-tracking technique. Ice thickness is deduced from prior-determined ice-shelf elevation assuming hydrostatic equilibrium. Mass fluxes are calculated both at the grounding line and at a flux gate located downstream. The grounding-line flux is compared to a mass input calculated from snow accumulation to deduce the glacier mass balance. The calculation is repeated at the flux gate downstream of the grounding line to estimate the average bottom melt rate of the ice shelf under steady-state conditions. The main results are: (1) Grounding lines are found several tens of km upstream of prior-identified positions, not because of a recent ice-sheet retreat but because of the inadequacy of prior-determined grounding-line positions. (2) No gross imbalance between outflow and inflow is detected on the nine glaciers being investigated, with an uncertainty of 10–20%. Prior-determined, largely positive mass imbalances were due to an incorrect localization of the grounding line. (3) High rates of bottom melting (24±7 mice a–1) are inferred near grounding zones, where ice reaches the deepest draft. A few glaciers exhibit lower bottom melt rates (4±7 mice a–1). Bottom melting, however, appears to be a major source of mass loss on Antarctic ice shelves.
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Bannor, Richard Kwasi. "Integration of Cumin markets in Rajasthan." Journal of Energy and Natural Resource Management 3, no. 2 (February 24, 2018): 37–43. http://dx.doi.org/10.26796/jenrm.v3i2.57.

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The study investigated the integration between cumin (Cuminum cyminum) markets pairs in Rajasthan State using monthlycumin price series of five (5) markets from 2008-2015. The co-integration tests results indicate Nagaur and Pali; Nagaur andJodhpur; Nagaur and Jalore markets are integrated in the long run at lag five (5). However, the rest of other market pairs arenot integrated in the long run. The results from the error correction model showed that, the lowest speed of adjustment towardslong run equilibrium was from Nagaur to Jalore market at rate of 37.4%. The highest speed of adjustment was 56.6%, runningNagaur to Pali market towards long run equilibrium. This is followed by a speed of adjustment of 45.1% running from Nagaur toJodhpur market towards along run equilibrium in a period of at most one (1) month. The results further indicate bidirectionalcausality between Nagaur and Pali markets and also Naguar and Jalore markets. There is also a unidirectional causality of pricechange from Merta City market of Nagaur to Bhagat Ki Kothi market of Jodhpur but not vise versa. The results from theunrestricted vector autoregressive (VAR) model was run for market pairs that were not cointegrated that cumin price seriesbetween Ajmer and Jodhpur; Jodhpur and Pali and Jodhpur and Jalore Granger causes each other in the short run whereasAjmer Granger causes Nagaur, Pali and Jalore in less than one month though in the long run they drift apart. The study furtherreveal that orthogonalized shock or unexpected shocks to Nagaur market will result in permanent effect on the prices of otherselected markets within one year. In the same way, unexpected shock to market prices of Pali will result in permanent priceeffect on Nagaur cumin prices but temporary on prices in Jodhpur. On the other hand unexpected shock to prices of Ajmer willresults in transitory or temporary price effect on prices in Pali, Nagaur, Jodhpur and Jalore markets.
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Waddy, Patricia. "Jörg Martin Merz, incorporating a draft by the late Anthony Blunt. Pietro da Cortona and Roman Baroque Architecture. The Getty Foundation and the Graham Foundation for Advanced Studies in the Fine Arts, Chicago. New Haven: Yale University Press, 2008. xii + 362 pp. index. illus. map. chron. $85. ISBN: 978–0–300–11123–1." Renaissance Quarterly 62, no. 1 (2009): 253–55. http://dx.doi.org/10.1086/598425.

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Dissertations / Theses on the topic "Mertz Drift"

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Beaman, RJ. "Origin of the Mertz Drift, George V Basin, East Antarctica." Thesis, Honours thesis, University of Tasmania, 2000. https://eprints.utas.edu.au/1036/1/Beaman_whole_Hons_thesis.pdf.

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During February-March 2000, a joint Italian/Australian marine geoscience expedition (Project WEGA) discovered and cored a large drift deposit, named the Mertz Drift. The drift is about 390 km\(^2\) in area, and lies in the western end of the George V Basin, East Antarctica. I document a study of the Mertz Drift as the deposit contains an important high-resolution record of palaeoenvironment changes during Holocene. X-radiographs of cores, visual core logs and multi-sensor core logger are used to distinguish facies in the cores. A comparison of facies from all cores, radiocarbon ages, thin section analysis and seafloor photographs of the Mertz Drift allowed interpretation of five different facies into four generalised phases of environmental history. A diamicton corresponds to sub-ice shelf, water-lain till deposited during the Last Glacial Maximum, and underlies the Mertz Drift. Unconformably overlying the diamicton is a massively bedded siliceous mud and diatom ooze (SMO) with a high proportion of ice-rafted debris. This unit represents a period of glacial retreat of the ice shelf and a transition to an open marine environment, commencing about 14,000 yr BP and lasting for about 9000 years. A thick succession of laminated and cross laminated SMO follows, deposited during a mid-Holocene climate optimum from 5000 to 3000 yr BP. Overlying the Mertz Drift drape is a massively bedded fine sand/SMO with a high proportion of ice-rafted debris, deposited from 3000 yr BP to present. This drape reflects modern oceanographic conditions commencing from a time of climatic deterioration. This study found seasonal changes in diatom assemblages within lamination couplets with mean deposition times of between 2.6 to 4.3 years. Two currents are believed responsible for the construction of the drift. Upwelled Circumpolar Deep Water transports fine grained sediments southwards towards the inner shelf, and deep, high salinity Shelf Water flows northwesterly along the George V Basin, focusing sinking sediments into a drift deposit. A relative reduction of sea ice cover during a climatic optimum is believed to be a key factor for longer periods of upwelled Circumpolar DeepWater over the outer shelf. This leads to a surge in bottom currents and the concentration of greater volumes of sediment into the drift. This study has important implications for oceanographers as the results suggest a non-steady-state of Antarctic Bottom Water production during the Holocene.
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