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Статті в журналах з теми "Atmospheric circulation Australia Mathematical models"
Grose, Michael R., James S. Risbey, Aurel F. Moise, Stacey Osbrough, Craig Heady, Louise Wilson, and Tim Erwin. "Constraints on Southern Australian Rainfall Change Based on Atmospheric Circulation in CMIP5 Simulations." Journal of Climate 30, no. 1 (January 2017): 225–42. http://dx.doi.org/10.1175/jcli-d-16-0142.1.
Повний текст джерелаColberg, Frank, Kathleen L. McInnes, Julian O'Grady, and Ron Hoeke. "Atmospheric circulation changes and their impact on extreme sea levels around Australia." Natural Hazards and Earth System Sciences 19, no. 5 (May 21, 2019): 1067–86. http://dx.doi.org/10.5194/nhess-19-1067-2019.
Повний текст джерелаTozer, Carly R., James S. Risbey, Didier P. Monselesan, Dougal T. Squire, Matthew A. Chamberlain, Richard J. Matear, and Tilo Ziehn. "Assessing the Representation of Australian Regional Climate Extremes and Their Associated Atmospheric Circulation in Climate Models." Journal of Climate 33, no. 4 (February 15, 2020): 1227–45. http://dx.doi.org/10.1175/jcli-d-19-0287.1.
Повний текст джерелаCai, Wenju, Tim Cowan, Arnold Sullivan, Joachim Ribbe, and Ge Shi. "Are Anthropogenic Aerosols Responsible for the Northwest Australia Summer Rainfall Increase? A CMIP3 Perspective and Implications." Journal of Climate 24, no. 10 (May 15, 2011): 2556–64. http://dx.doi.org/10.1175/2010jcli3832.1.
Повний текст джерелаJohnson, Fiona, and Ashish Sharma. "A Comparison of Australian Open Water Body Evaporation Trends for Current and Future Climates Estimated from Class A Evaporation Pans and General Circulation Models." Journal of Hydrometeorology 11, no. 1 (February 1, 2010): 105–21. http://dx.doi.org/10.1175/2009jhm1158.1.
Повний текст джерелаBates, Bryson C., Andrew J. Dowdy, and Richard E. Chandler. "Lightning Prediction for Australia Using Multivariate Analyses of Large-Scale Atmospheric Variables." Journal of Applied Meteorology and Climatology 57, no. 3 (March 2018): 525–34. http://dx.doi.org/10.1175/jamc-d-17-0214.1.
Повний текст джерелаHorenko, Illia. "On Robust Estimation of Low-Frequency Variability Trends in Discrete Markovian Sequences of Atmospheric Circulation Patterns." Journal of the Atmospheric Sciences 66, no. 7 (July 1, 2009): 2059–72. http://dx.doi.org/10.1175/2008jas2959.1.
Повний текст джерелаGibson, Peter B., Andrew J. Pitman, Ruth Lorenz, and Sarah E. Perkins-Kirkpatrick. "The Role of Circulation and Land Surface Conditions in Current and Future Australian Heat Waves." Journal of Climate 30, no. 24 (December 2017): 9933–48. http://dx.doi.org/10.1175/jcli-d-17-0265.1.
Повний текст джерелаCharles, S. P., B. C. Bates, and N. R. Viney. "Linking atmospheric circulation to daily rainfall patterns across the Murrumbidgee River Basin." Water Science and Technology 48, no. 7 (October 1, 2003): 233–40. http://dx.doi.org/10.2166/wst.2003.0445.
Повний текст джерелаSpinoni, Jonathan, Paulo Barbosa, Edoardo Bucchignani, John Cassano, Tereza Cavazos, Jens H. Christensen, Ole B. Christensen, et al. "Future Global Meteorological Drought Hot Spots: A Study Based on CORDEX Data." Journal of Climate 33, no. 9 (May 1, 2020): 3635–61. http://dx.doi.org/10.1175/jcli-d-19-0084.1.
Повний текст джерелаДисертації з теми "Atmospheric circulation Australia Mathematical models"
Dionne, Pierre 1962. "Numerical simulation of blocking by the resonance of topographically forced waves." Thesis, McGill University, 1986. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=65542.
Повний текст джерелаJia, XiaoJing 1977. "The mechanisms and the predictability of the Arctic oscillation and the North Atlantic oscillation /." Thesis, McGill University, 2007. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=103026.
Повний текст джерелаHang, Jian, and 杭建. "Wind conditions and urban ventilation in idealized city models." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2009. http://hub.hku.hk/bib/B42841471.
Повний текст джерелаKaspi, Yohai. "Turbulent convection in the anelastic rotating sphere : a model for the circulation on the giant planets." Thesis, Massachusetts Institute of Technology, 2008. http://hdl.handle.net/1721.1/45780.
Повний текст джерелаIncludes bibliographical references (p. 207-221).
This thesis studies the dynamics of a rotating compressible gas sphere, driven by internal convection, as a model for the dynamics on the giant planets. We develop a new general circulation model for the Jovian atmosphere, based on the MITgcm dynamical core augmenting the nonhydrostatic model. The grid extends deep into the planet's interior allowing the model to compute the dynamics of a whole sphere of gas rather than a spherical shell (including the strong variations in gravity and the equation of state). Different from most previous 3D convection models, this model is anelastic rather than Boussinesq and thereby incorporates the full density variation of the planet. We show that the density gradients caused by convection drive the system away from an isentropic and therefore barotropic state as previously assumed, leading to significant baroclinic shear. This shear is concentrated mainly in the upper levels and associated with baroclinic compressibility effects. The interior flow organizes in large cyclonically rotating columnar eddies parallel to the rotation axis, which drive upgradient angular momentum eddy fluxes, generating the observed equatorial superrotation. Heat fluxes align with the axis of rotation, contributing to the observed flat meridional emission. We show the transition from weak convection cases with symmetric spiraling columnar modes similar to those found in previous analytic linear theory, to more turbulent cases which exhibit similar, though less regular and solely cyclonic, convection columns which manifest on the surface in the form of waves embedded within the superrotation. We develop a mechanical understanding of this system and scaling laws by studying simpler configurations and the dependence on physical properties such as the rotation period, bottom boundary location and forcing structure. These columnar cyclonic structures propagate eastward, driven by dynamics similar to that of a Rossby wave except that the restoring planetary vorticity gradient is in the opposite direction, due to the spherical geometry in the interior.
(cont.) We further study these interior dynamics using a simplified barotropic annulus model, which shows that the planetary vorticity radial variation causes the eddy angular momentum flux divergence, which drives the superrotating equatorial flow. In addition we study the interaction of the interior dynamics with a stable exterior weather layer, using a quasigeostrophic two layer channel model on a beta plane, where the columnar interior is therefore represented by a negative beta effect. We find that baroclinic instability of even a weak shear can drive strong, stable multiple zonal jets. For this model we find an analytic nonlinear solution, truncated to one growing mode, that exhibits a multiple jet meridional structure, driven by the nonlinear interaction between the eddies. Finally, given the density field from our 3D convection model we derive the high order gravitational spectra of Jupiter, which is a measurable quantity for the upcoming JUNO mission to Jupiter.
by Yohai Kaspi.
Ph.D.
Zhai, Ping Ph D. Massachusetts Institute of Technology. "Buoyancy-driven circulation in the Red Sea." Thesis, Massachusetts Institute of Technology, 2014. http://hdl.handle.net/1721.1/95561.
Повний текст джерелаCataloged from PDF version of thesis.
Includes bibliographical references (pages 175-180).
This thesis explores the buoyancy-driven circulation in the Red Sea, using a combination of observations, as well as numerical modeling and analytical method. The first part of the thesis investigates the formation mechanism and spreading of Red Sea Overflow Water (RSOW) in the Red Sea. The preconditions required for open-ocean convection, which is suggested to be the formation mechanism of RSOW, are examined. The RSOW is identified and tracked as a layer with minimum potential vorticity and maximum chlorofluorocarbon-12. The pathway of the RSOW is also explored using numerical simulation. If diffusivity is not considered, the production rate of the RSOW is estimated to be 0.63 Sv using Walin's method. By comparing this 0.63 Sv to the actual RSOW transport at the Strait of Bab el Mandeb, it is implied that the vertical diffusivity is about 3.4 x10-5 m 2 s-1. The second part of the thesis studies buoyancy-forced circulation in an idealized Red Sea. Buoyancy-loss driven circulation in marginal seas is usually dominated by cyclonic boundary currents on f-plane, as suggested by previous observations and numerical modeling. This thesis suggests that by including [beta]-effect and buoyancy loss that increases linearly with latitude, the resultant mean Red Sea circulation consists of an anticyclonic gyre in the south and a cyclonic gyre in the north. In mid-basin, the northward surface flow crosses from the western boundary to the eastern boundary. The observational support is also reviewed. The mechanism that controls the crossover of boundary currents is further explored using an ad hoc analytical model based on PV dynamics. This ad hoc analytical model successfully predicts the crossover latitude of boundary currents. It suggests that the competition between advection of planetary vorticity and buoyancy-loss related term determines the crossover latitude. The third part of the thesis investigates three mechanisms that might account for eddy generation in the Red Sea, by conducting a series of numerical experiments. The three mechanisms are: i) baroclinic instability; ii) meridional structure of surface buoyancy losses; iii) cross-basin wind fields.
by Ping Zhai.
Ph. D.
Yang, Lina, and 阳丽娜. "City ventilation of Hong Kong by thermal buoyancy." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2009. http://hub.hku.hk/bib/B42841380.
Повний текст джерелаLuo, Zhiwen, and 罗志文. "City ventilation by slope wind." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2010. http://hub.hku.hk/bib/B46089962.
Повний текст джерелаMazloff, Matthew R. "Production and analysis of a Southern Ocean state estimate." Thesis, Online version, 2006. http://hdl.handle.net/1912/1282.
Повний текст джерела"September 2006." Bibliography: p. 97-106.
Dail, Holly Janine. "Atlantic Ocean circulation at the last glacial maximum : inferences from data and models." Thesis, Massachusetts Institute of Technology, 2012. http://hdl.handle.net/1721.1/78367.
Повний текст джерелаThis electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.
Cataloged from student-submitted PDF version of thesis.
Includes bibliographical references (p. 221-236).
This thesis focuses on ocean circulation and atmospheric forcing in the Atlantic Ocean at the Last Glacial Maximum (LGM, 18-21 thousand years before present). Relative to the pre-industrial climate, LGM atmospheric CO₂ concentrations were about 90 ppm lower, ice sheets were much more extensive, and many regions experienced significantly colder temperatures. In this thesis a novel approach to dynamical reconstruction is applied to make estimates of LGM Atlantic Ocean state that are consistent with these proxy records and with known ocean dynamics. Ocean dynamics are described with the MIT General Circulation Model in an Atlantic configuration extending from 35°S to 75°N at 1° resolution. Six LGM proxy types are used to constrain the model: four compilations of near sea surface temperatures from the MARGO project, as well as benthic isotope records of [delta]¹⁸O and [delta]¹³C compiled by Marchal and Curry; 629 individual proxy records are used. To improve the fit of the model to the data, a least-squares fit is computed using an algorithm based on the model adjoint (the Lagrange multiplier methodology). The adjoint is used to compute improvements to uncertain initial and boundary conditions (the control variables). As compared to previous model-data syntheses of LGM ocean state, this thesis uses a significantly more realistic model of oceanic physics, and is the first to incorporate such a large number and diversity of proxy records. A major finding is that it is possible to find an ocean state that is consistent with all six LGM proxy compilations and with known ocean dynamics, given reasonable uncertainty estimates. Only relatively modest shifts from modern atmospheric forcing are required to fit the LGM data. The estimates presented herein succesfully reproduce regional shifts in conditions at the LGM that have been inferred from proxy records, but which have not been captured in the best available LGM coupled model simulations. In addition, LGM benthic [delta]¹⁸O and [delta]¹³C records are shown to be consistent with a shallow but robust Atlantic meridional overturning cell, although other circulations cannot be excluded.
by Holly Janine Dail.
Ph.D.
Comer, Neil Thomas. "Validation and heterogeneity investigation of the Canadian Land Surface Scheme (CLASS) for wetland landscapes." Thesis, McGill University, 2001. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=38173.
Повний текст джерелаCLASS was then tuned for a specific bog location found in the Hudson Bay Lowland (HBL) during the Northern Wetlands Study (NOWES). With bog surfaces better described within the model, testing of CLASS over a highly heterogeneous 169 km2 HBL region is then undertaken. The model is first modified for lake and pond surfaces and then separate runs for bog, fen, lake and tree/shrub categories is undertaken. Using a GIS, the test region under which airborne flux measurements are available is divided into 104 grid cells and proportions of each surface type are calculated within each cell. Findings indicate that although the modelled grid average radiation and flux values are reasonably well reproduced (4% error for net radiation, 10% for latent heat flux and 30% for sensible heat flux), spatial agreement between modelled and observed grid cells is disappointing. (Abstract shortened by UMI.)
Книги з теми "Atmospheric circulation Australia Mathematical models"
Whetton, Peter. Australian Region intercomparison of the results of some general circulation models used in enhanced greenhouse experiments. Australia: CSIRO, 1991.
Знайти повний текст джерелаEnting, I. G. A strategy for calibrating atmospheric transport models. Melbourne: Commonwealth Scientific and Industrial Research Organization, Australia, 1985.
Знайти повний текст джерелаTschuck, Peter. Atmospheric blocking in a general circulation model. Zürich: Geographisches Institut ETH, 1998.
Знайти повний текст джерелаMansbridge, J. V. Sensitivity studies in a two-dimensional atmospheric transport model. Australia: CSIRO, 1989.
Знайти повний текст джерелаEnting, I. G. Preliminary studies with a two-dimensional model using transport fields derived from a GCM. Melbourne: Commonwealth Scientific and Industrial Research Organization, Australia, 1987.
Знайти повний текст джерелаBerner, Judith. Detection and stochastic modeling of nonlinear signatures in the geopotential height field of an atmospheric general circulation model. St. Augustin [Germany]: Asgard Verlag, 2003.
Знайти повний текст джерелаSempf, Mario. Nichtlineare Dynamik atmosphärischer Zirkulationsregime in einem idealisierten Modell: Nonlinear dynamics of atmospheric circulation regimes in an idealized model. Bremerhaven: Alfred-Wegener-Institut für Polar- und Meeresforschung, 2006.
Знайти повний текст джерелаWeisheimer, Antje. Niederfrequente Variabilität grossräumiger atmosphärischer Zirkulationsstrukturen in spektralen Modellen niederer Ordnung =: Ultra-low-frequency variability of large scale atmospheric circulation patterns in spectral low-order models. Bremerhaven: Alfred-Wegener-Institut für Polar- und Meeresforschung, 2000.
Знайти повний текст джерелаEnting, I. G. Preliminary studies with a two-dimensional model using transport fields derived from a GCM. Melbourne: CISRO Australia, 1987.
Знайти повний текст джерелаDonner, Leo Joseph, Richard Somerville, and Wayne H. Schubert. The development of atmospheric general circulation models: Complexity, synthesis, and computation. Cambridge: Cambridge University Press, 2011.
Знайти повний текст джерелаЧастини книг з теми "Atmospheric circulation Australia Mathematical models"
Lenhard, Johannes. "Experiment and Artificiality." In Calculated Surprises, 17–45. Oxford University Press, 2019. http://dx.doi.org/10.1093/oso/9780190873288.003.0002.
Повний текст джерелаТези доповідей конференцій з теми "Atmospheric circulation Australia Mathematical models"
Babanin, Alexander V. "Wave-Induced Turbulence, Linking Metocean and Large Scales." In ASME 2020 39th International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/omae2020-18373.
Повний текст джерела