Zobrazeno 1 - 10
of 42
pro vyhledávání: '"David C. McAdoo"'
Autor:
Sinead L. Farrell, David C. McAdoo, B. C. Elder, Nathan Kurtz, Jacqueline A. Richter-Menge, T. Newman, L. N. Connor
Publikováno v:
Journal of Geophysical Research: Oceans. 119:8578-8602
Knowledge of contemporaneous snow depth on Arctic sea ice is important both to constrain the regional climatology and to improve the accuracy of satellite altimeter estimates of sea ice thickness. We assess new data available from the NASA Operation
Publikováno v:
IEEE Transactions on Geoscience and Remote Sensing. 51:2188-2200
Only in the past eight years has the feasibility of using satellite-borne altimeters to estimate sea ice freeboard and thickness been demonstrated, and these estimates still have uncertainties primarily associated with limited knowledge of snow loadi
Publikováno v:
Journal of Geophysical Research: Oceans. 118:917-930
[1] Precise mappings of sea surface topography, slope, and gravity of the Arctic Ocean are derived from altimeter data collected by Envisat and ICESat. Both altimeters measured instantaneous sea surface height at leads in the sea ice. To reduce conta
Publikováno v:
IEEE Transactions on Geoscience and Remote Sensing. 47:4223-4228
Bathymetric charts are essential for modeling oceanic processes, yet, in remote areas, direct measurements of seafloor depth are often scarce. It is possible to augment sparse depth soundings with dense satellite-derived gravity data to provide addit
Publikováno v:
Remote Sensing of Environment. 113:563-570
Sea ice thickness is a crucial, but very undersampled cryospheric parameter of fundamental importance for climate modeling. Advances in satellite altimetry have enabled the measurement of sea ice freeboard using satellite microwave altimeters. Unfort
Autor:
D. Wallis, David C. McAdoo, Duncan J. Wingham, S. Manizade, R.K. Raney, Carl Leuschen, K. A. Giles, William B. Krabill, Seymour W. Laxon
Publikováno v:
Remote Sensing of Environment. 111:182-194
Knowledge of sea ice thickness is critical for the prediction of future climate, and for assessing the significance of changes in thickness. Sea ice thickness can be calculated from radar or laser satellite altimetry measurements of freeboard. Howeve
Publikováno v:
Journal of Geodesy
Throughout 2004 the GRACE (Gravity Recovery And Climate Experiment) orbit contracted slowly to yield a sparse repeat track of 61 revolutions every 4 days on 19 September 2004. As a result, we show from linear perturbation theory that geopotential inf
Publikováno v:
Journal of Geophysical Research: Solid Earth. 106:8871-8886
New gravity fields from airborne gravimetry and from ERS-1 and -2 satellite altimetry cover extensive portions of the Arctic Ocean. These two data sets may constitute as much as 60% of the data contributions to the Arctic Gravity Project compilation.
Autor:
Seymour W. Laxon, David C. McAdoo
Publikováno v:
Geological Society, London, Special Publications. 108:155-164
A high-resolution gravity field covering virtually all of the Weddell Sea has been derived using a combination of Geosat and ERS-1 data. This field encompasses the entire Weddell Sea region, including areas which are seasonally, as well as areas whic
Autor:
Donghui Yi, Sinead L. Farrell, K. A. Giles, David C. McAdoo, H. Jay Zwally, Andy Ridout, Seymour W. Laxon
Publikováno v:
Geophysical Research Letters. 39
ICESat and Envisat altimetry data provide measurements of the instantaneous sea surface height (SSH) across the Arctic Ocean, using lead and open water elevation within the sea ice pack. First, these data were used to derive two independent mean sea