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Rectified Tidal Currents And Tidal Mixing Fronts Controls On The Ross Ice Shelf Flow And Mass Balance
Download Rectified Tidal Currents And Tidal Mixing Fronts Controls On The Ross Ice Shelf Flow And Mass Balance full books in PDF, epub, and Kindle. Read online Rectified Tidal Currents And Tidal Mixing Fronts Controls On The Ross Ice Shelf Flow And Mass Balance ebook anywhere anytime directly on your device. Fast Download speed and no annoying ads. We cannot guarantee that every ebooks is available!
Book Synopsis Rectified Tidal Currents and Tidal-mixing Fronts: Controls on the Ross Ice-shelf Flow and Mass Balance by : Douglas Reed MacAyeal
Download or read book Rectified Tidal Currents and Tidal-mixing Fronts: Controls on the Ross Ice-shelf Flow and Mass Balance written by Douglas Reed MacAyeal and published by . This book was released on 1983 with total page 274 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Publications Abstracts by : Environmental Research Laboratories (U.S.)
Download or read book Publications Abstracts written by Environmental Research Laboratories (U.S.) and published by . This book was released on 1983 with total page 170 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Environmental Research Laboratories Publication Abstracts by : Environmental Research Laboratories (U.S.)
Download or read book Environmental Research Laboratories Publication Abstracts written by Environmental Research Laboratories (U.S.) and published by . This book was released on 1983 with total page 170 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Dynamics of the West Antarctic Ice Sheet by : C.J. van der Veen
Download or read book Dynamics of the West Antarctic Ice Sheet written by C.J. van der Veen and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 376 pages. Available in PDF, EPUB and Kindle. Book excerpt: Few scientists doubt the prediction that the antropogenic release of carbon dioxide in the atmosphere will lead to some warming of the earth's climate. So there is good reason to investigate the possible effects of such a warming, in dependence of geographical and social economic setting. Many bodies, governmental or not, have organized meetings and issued reports in which the carbon dioxide problem is defined, reviewed, and possible threats assessed. The rate at which such reports are produced still increases. However, while more and more people are getting involved in the 'carbon dioxide business', the number of investigators working on the basic problems grows, in our view, too slowly. Many fundamental questions are still not answered in a satisfactory way, and the carbon dioxide building rests on a few thin pillars. One such fundamental question concerns the change in sea level associated with a climatic warming of a few degrees. A number of processes can be listed that could all lead to changes of the order of tens of centimeters (e. g. thermal expansion, change in mass balance of glaciers and ice sheets). But the picture of the carbon dioxide problem has frequently be made more dramatic by suggesting that the West Antarctic Ice Sheet is unstable, implying a certain probability of a 5 m higher sea-level stand within a few centuries.
Book Synopsis Oceanology of the Antarctic Continental Shelf by : Stanley S. Jacobs
Download or read book Oceanology of the Antarctic Continental Shelf written by Stanley S. Jacobs and published by . This book was released on 1985 with total page 334 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Numerical Model of Interactions Between a Polar Ice Stream, the Ocean and the Solid Earth by : Craig Stanley Lingle
Download or read book A Numerical Model of Interactions Between a Polar Ice Stream, the Ocean and the Solid Earth written by Craig Stanley Lingle and published by . This book was released on 1983 with total page 502 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Environment of West Antarctica, Potential CO2-induced Changes by :
Download or read book Environment of West Antarctica, Potential CO2-induced Changes written by and published by National Academies. This book was released on 1984 with total page 268 pages. Available in PDF, EPUB and Kindle. Book excerpt: Includes 12 presentations made at the workshop, summarizes the thrust of workshop discussion and presents the Committee's initial responses to questions about the probable effects of increasing levels of carbon dioxide on precipitation, summer temperatures and ocean heat flux of west Antarctica.
Book Synopsis Dissertation Abstracts International by :
Download or read book Dissertation Abstracts International written by and published by . This book was released on 1983-10 with total page 520 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Iceberg Research written by and published by . This book was released on with total page 436 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Recent Polar and Glaciological Literature by :
Download or read book Recent Polar and Glaciological Literature written by and published by . This book was released on 1984 with total page 562 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Skrifter om Svalbard og Nordishavet by :
Download or read book Skrifter om Svalbard og Nordishavet written by and published by . This book was released on 1986 with total page 416 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Skrifter written by and published by . This book was released on 1986 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Ice Shelf-ocean Interactions in a General Circulation Model by : Véronique Dansereau
Download or read book Ice Shelf-ocean Interactions in a General Circulation Model written by Véronique Dansereau and published by . This book was released on 2012 with total page 123 pages. Available in PDF, EPUB and Kindle. Book excerpt: Interactions between the ocean circulation in sub-ice shelf cavities and the overlying ice shelf have received considerable attention in the context of observed changes in flow speeds of marine ice sheets around Antarctica. Modeling these interactions requires parameterizing the turbulent boundary layer processes to infer melt rates from the oceanic state at the ice-ocean interface. Here we explore two such parameterizations in the context of the MIT ocean general circulation model coupled to the z-coordinates ice shelf cavity model of Losch (2008). We investigate both idealized ice shelf cavity geometries as well as a realistic cavity under Pine Island Ice Shelf (PIIS), West Antarctica. Our starting point is a three-equation melt rate parameterization implemented by Losch (2008), which is based on the work of Hellmer and Olbers (1989). In this form, the transfer coefficients for calculating heat and freshwater fluxes are independent of frictional turbulence induced by the proximity of the moving ocean to the fixed ice interface. More recently, Holland and Jenkins (1999) have proposed a parameterization in which the transfer coefficients do depend on the ocean-induced turbulence and are directly coupled to the speed of currents in the ocean mixed layer underneath the ice shelf through a quadratic drag formulation and a bulk drag coefficient. The melt rate parameterization in the MITgcm is augmented to account for this velocity dependence. First, the effect of the augmented formulation is investigated in terms of its impact on melt rates as well as on its feedback on the wider sub-ice shelf circulation. We find that, over a wide range of drag coefficients, velocity-dependent melt rates are more strongly constrained by the distribution of mixed layer currents than by the temperature gradient between the shelf base and underlying ocean, as opposed to velocity-independent melt rates. This leads to large differences in melt rate patterns under PIIS when including versus not including the velocity dependence. In a second time, the modulating effects of tidal currents on melting at the base of PIIS are examined. We find that the temporal variability of velocity-dependent melt rates under tidal forcing is greater than that of velocity-independent melt rates. Our experiments suggest that because tidal currents under PIIS are weak and buoyancy fluxes are strong, tidal mixing is negligible and tidal rectification is restricted to very steep bathymetric features, such as the ice shelf front. Nonetheless, strong tidally-rectified currents at the ice shelf front significantly increase ablation rates there when the formulation of the transfer coefficients includes the velocity dependence. The enhanced melting then feedbacks positively on the rectified currents, which are susceptible to insulate the cavity interior from changes in open ocean conditions.
Author :National Research Council (U.S.). Polar Research Board Publisher :National Academies ISBN 13 : Total Pages :118 pages Book Rating :4.1/5 (226 download)
Book Synopsis Report on United States Antarctic Research Activities by : National Research Council (U.S.). Polar Research Board
Download or read book Report on United States Antarctic Research Activities written by National Research Council (U.S.). Polar Research Board and published by National Academies. This book was released on 1989 with total page 118 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Antarctic Bibliography written by and published by . This book was released on 1989 with total page 670 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis American Doctoral Dissertations by :
Download or read book American Doctoral Dissertations written by and published by . This book was released on 1982 with total page 564 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis DEM Generation and Ocean Tide Modeling Over Sulzberger Ice Shelf, West Antarctica, Using Synthetic Aperture Radar Interferometry by : Sang-Ho Baek
Download or read book DEM Generation and Ocean Tide Modeling Over Sulzberger Ice Shelf, West Antarctica, Using Synthetic Aperture Radar Interferometry written by Sang-Ho Baek and published by . This book was released on 2006 with total page 144 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: Accurate knowledge of the Antarctic ice sheet mass balance plays an important role on the global sea level change. Ocean tides (barotropic and baroclinic) and tidal currents cause basal melting and migration of grounding lines, which are all critical to the accurate determination of ice sheet or ice stream mass balance. Ocean tides in the Antarctic Ocean, especially underneath ice shelves or sea ice, are poorly known primarily due to lack of observations with adequate resolution and knowledge of the bathymetry and ice shelf bottom roughness. InSAR has been used to measure the ice sheet mass balance, ice topography, ice stream velocity, and the location of the grounding lines. To properly use InSAR measurements for ice mass balance and because of their high spatial resolution (tens of meters), knowledge of ocean tides underneath the ice shelves needs to be accurately known and with commensurate resolution. Here two-pass differential InSAR (DInSAR) technique is applied for tidal signal modeling underneath the Sulzberger ice shelf, West Antarctica. The fine resolution (60-m) Digital Elevation Model (DEM) over grounded ice and ice shelf, obtained by combining ERS-1/2 tandem InSAR and ICESat laser altimetry, has been used to correct the topography phase from interferograms, resulting in a more accurate time series of vertical deformation measurements. In this study, it is demonstrated for the first time, that observable tidal constituents can be estimated underneath an ice shelf using an InSAR time series. In particular, it is shown that the time series of observed tidal differences from InSAR agrees well with a number of global/regional ocean tide models such as NAO. 99b, TPXO. 6.2, GOT00.2, CATS02.01, and FES2004, with the regional model, CATS02.01, having the best agreement. The technique developed here can be applied to other ice shelf regions where tide modeling is poor in accuracy and resolution.
