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Sunday, August 9, 2020 | History

1 edition of Surface topography of the Greenland ice sheet from satellite radar altimetry found in the catalog.

Surface topography of the Greenland ice sheet from satellite radar altimetry

Surface topography of the Greenland ice sheet from satellite radar altimetry

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Published by National Aeronautics and Space Administration, Office of Management, Scientific and Technical Information Division in Washington, DC .
Written in English

    Places:
  • Greenland
    • Subjects:
    • Ice sheets -- Greenland -- Maps.,
    • Ice sheets -- Greenland -- Remote sensing.,
    • Greenland -- Maps, Physical.

    • Edition Notes

      StatementRobert A. Bindschadler ... [et al.].
      GenreMaps., Maps, Physical.
      SeriesNASA SP ;, 503
      ContributionsBindschadler, R. A.
      Classifications
      LC ClassificationsGB2596.5 .S87 1989
      The Physical Object
      Paginationiii, 105 p. :
      Number of Pages105
      ID Numbers
      Open LibraryOL1811321M
      LC Control Number89600282

      volume scattering to derive surface roughness from radar altimetry over the inland parts of the East Antarctic Ice Sheet. More recently, Yi et al. [] used 8 day repeat orbit data from the Ice, Cloud, and land Elevation Satellite (ICESat) to produce a map of surface roughness for the entire Greenland Ice Sheet. Simultaneous multiangular.   Abstract: Spatial-temporal variability and changes of Greenland ice sheet elevation from to are analyzed from merged ERS-1, ERS-2, and Envisat satellite radar altimeter data. A methodology for determining intersatellite biases was developed and applied in order to merge measurements from these different satellites and to create continuous and consistent time series.

      A new methodology for detecting ice sheet surface elevation changes from laser altimetry data. IEEE Transactions on Geoscience and Remote Sensing, – Thomsen, H., et al. The Nioghalvfjerdsfjorden glacier project, north-east Greenland: a study of ice sheet response to climatic change, Geology of Greenland Survey Bulletin, Ice Sheet Topography, Slopes, and Flow Directions from ERS Altimetry H. J. Zwally (1), Anita Brenner (2),John DiMarzio(2), and Mario Giovinetto(3) (1)NASA Goddard Space Flight Center Code Greenbelt, MD (2)Hughes STX Greenbelt Rd. Suite Greenbelt, MD (3) University of Calgary Calgary, Canada.

        Earth's ice sheets are melting and sea levels are rising, so it behooves us to understand better which climate processes are responsible for how much of the mass loss. Smith et al. estimated grounded and floating ice mass change for the Greenland and Antarctic ice sheets from to using satellite laser altimetry data from NASA's ICESat and ICESat-2 satellites. * Correspondence: [email protected]; Tel.: + Received: 19 May ; Accepted: 13 July ; Published: 19 July Abstract: Radar altimetry provides valuable measurements to characterize the state and the evolution of the ice sheet cover of Antartica and Greenland. Global Navigation Satellite System Reflectometry.


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Surface topography of the Greenland ice sheet from satellite radar altimetry Download PDF EPUB FB2

Get this from a library. Surface topography of the Greenland ice sheet from satellite radar altimetry. [R A Bindschadler;] -- This document describes the process of production of maps of the surface of the Greenland ice sheet from data from remote sensing by a Seasat satellite, and defines ice flow directions, together with.

Surface Topography of the Greenland Ice Sheet from Satellite Radar Altimetry. NASA SP R. A., Zwally, H. Jay., Major, Judith A., and Brenner, Anita C. BindschadlerSeller Rating: % positive. The surface and bottom topography of the central Greenland ice sheet was determined from airborne ice-radar soundings over a km by km grid centered on the “Summit” site (lat.

Surface elevation maps of the southern half of the Greenland subcontinent are produced from radar altimeter data acquired by the Seasat satellite. A summary of the processing procedure and examples of return waveform data are given. The elevation data are used to generate a regular grid which is then computer contoured to provide an elevation contour by:   The surface elevation of the southern Greenland ice sheet and surface features of the ice flow are obtained from the radar altimeter on the GEOS 3 satellite.

The achieved accuracy in surface Cited by:   The Greenland Ice Sheet has been a major contributor to global sea-level rise in recent decades 1,2, and it is expected to continue to be so gh increases in glacier flow 4,5,6 and surface.

The analysis of 25 years of satellite radar altimetry data reveals significant changes in the Greenland Ice Sheet surface elevation (Fig. 2 and supporting material). The early s show only areas of modest elevation changes, with no clear spatial pattern of thinning or thickening although the accumulated volume change shows a small growth.

Sincethe altimeters of the ERS European Satellites allow the observation of 80% of the Antarctica ice sheet and the whole Greenland ice sheet: They thus offer for the first time a unique vision of polar ice caps.

Indeed, surface topography is an essential data thanks to its capacity to highlight the physical processes which control the. Surface topography is one of the most pertinent parameters for monitoring the ice cap, but also for the constraint of ice flow models.

Radar altimetry on high latitude polar zones started in with the launch of the ERS-1 mission by the European Space Agency, the first mission using specialized instruments on board for the studying of poles.

Products. Sea surface height products; Value-added products; Wind/wave products; Auxiliary products; Altimetry Sea Ice products; Ocean indicators products. The surface topography of the Greenland and Antarctic ice sheets is the principal ice parameter ob­ tainable from satellite radar altimetry.

The improved ability of the GEOSA T altimeter to follow irregu­ The ice-sheet surface typically has irregularities varying from. BibTeX @MISC{I_surfacetopography, author = {Altimetry (nas I and Robert A.

Bindschadler and H. Jay Zwally and Judith A. Major and Anita C. Brenner}, title = {Surface Topography of the Greenland Ice Sheet from Satellite Radar Altimetry}, year = {}}. We reconstruct the mass balance of the Greenland Ice Sheet for the past 46 years by comparing glacier ice discharge into the ocean with interior accumulation of snowfall from regional atmospheric climate models over drainage basins.

The mass balance started to deviate from its natural range of variability in the s. The mass loss has increased sixfold since the s. Mountain Glaciers. Satellite altimetry has been used extensively in the past few decades to observe changes affecting large and remote regions covered by land ice such as the Greenland and Antarctic ice sheets.

Glaciers and ice caps have been studied less extensively due to the limitation of altimetry over complex topography. However, their role in current sea-level budgets is significant and. Altimetry is probably one of the most powerful tools for ice sheet observation.

Our vision of the Antarctic ice sheet has been deeply transformed since the launch of the ERS1 satellite in The SEASAT‐I radar altimeter data set acquired over both the Antarctic and Greenland continental ice sheets is analyzed to obtain corrected ranges to the ice surface. The radar altimeter functional response over the continental ice sheets is considerably more complex than over the oceans.

A variety of parameters may be inferred via radar altimeter measurements, including sea surface height and ocean topography, the lateral extent of sea ice and the altitude of large icebergs above sea-level, the topography of land and ice sheets and even that of the sea floor - the shape of the sea surface influenced by seafloor bathymetry.

Abstract: A new analysis of Seasat and Geosat satellite radar altimeter measurements over the Greenland ice sheet was performed to determine surface elevation change. The new analysis includes twice as many measurements and has 50% greater spatial coverage than the authors' previous study.

In addition, a precise global ocean reference network created from four years of Topex/Poseidon. On the other hand, except for a few isolated lines and small areal surveys, gravity data is almost totally lacking over the interior of Greenland.

Satellite altimetry from SEASAT and GEOSAT provided topographic data over much of the interior of the island south of 72° N (Bindschadler et al., ) and this should be extended to the northern.

Surface melt in the ablation zone of Greenland varies considerably, with increasing rates over the satellite observational period. Prior to airborne and satellite altimetry studies, the record is primarily based on point measurements.

Here, we develop an independent method of estimating supraglacial melt from satellite images to produce a broad spatial record of mass balance in west Greenland. Repeated laser‐altimeter surveys and modelled snowfall/summer melt show average ice loss from Greenland between and was 80 ± 12 km3 yr−1, compared to about 60 km3 yr−1 for /4–/9.

Ha. Keywords: Greenland Ice Sheet, CryoSat, ice loss, radar altimetry, lidar altimetry, radar penetration, IceBridge. Citation: Gray L, Burgess D, Copland L, Langley K, Gogineni P, Paden J, Leuschen C, van As D, Fausto R, Joughin I and Smith B () Measuring Height Change Around the Periphery of the Greenland Ice Sheet With Radar Altimetry.

Front.The surface elevation of the southern Greenland ice sheet and surface features of the ice flow are obtained from the radar altimeter on the GEOS 3 satellite. The achieved accuracy in surface elevation is???2 m.

As changes in surface elevation are indicative of changes in ice volume, the mass balance of the present ice sheets could be determined by repetitive mapping of the surface elevation.