By Robert Massom, Dan Lubin
Polar distant Sensing is a two-volume paintings delivering a accomplished, multidisciplinary dialogue of the functions of satellite tv for pc sensing. quantity 2 specializes in the ice sheets, icebergs, and interactions among ice sheets and the ambience and ocean. It includes information regarding the functions of satellite tv for pc distant sensing in all correct polar similar disciplines, together with glaciology, meteorology, weather and radiation stability and oceanogaraphy. It additionally presents a quick overview of the cutting-edge of every self-discipline, together with present concerns and questions. a number of passive and energetic distant sensor varieties are mentioned, and the ebook then concentrates on particular geophysical functions. Its interdisciplinary strategy signifies that significant advances and courses are highlighted. Polar distant Sensing: Ice Sheets summarizes primary rules of detectors, imaging and geophysical product retrieval encompasses a bankruptcy at the very important new box of satellite tv for pc synthetic-aperture radar interferometry is a "one cease store" for polar distant sensing info includes major new details at the Earth's polar areas describes subtle groundbased distant sensing functions with particular connection with their use in polar areas.
Read Online or Download Polar Remote Sensing: Volume II: Ice Sheets (Springer Praxis Books Geophysical Sciences) (v. 2) PDF
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Extra info for Polar Remote Sensing: Volume II: Ice Sheets (Springer Praxis Books Geophysical Sciences) (v. 2)
2002). 12. html>i) will achieve its scienti®c goals by combining satellite gradiometry with Global Positioning System (GPS) inter-satellite tracking at low altitude. It will result in an improved model, at a spatial resolution of $100 km, of the geoid and Sec. 2 Ice-sheet mass balanceÐbackground information 19 static gravity ®eld to an accuracy of $2 cm and 1 mGal (10À5 m sÀ2 ), respectively. The bene®cial outcomes will be: . . an accurate and uni®ed global height reference for ice sheet and ocean elevations; an improved marine geoid (surface of equal gravitational potential) from which to derive absolute ocean currents from satellite radar altimetry, leading to an improved understanding of global ocean circulation and the transfer of heat; and improved constraints for lithospheric modeling.
Snow accumulation on polar ice sheets is approximately balanced by gravitational ice ¯ow towards the ice-sheet margins, where ice below the equilibrium line seasonally melts or calves into the ocean as icebergs. The equilibrium line marks the location where snow accumulation is exactly balanced by ablation over 1 year. Changes in ice mass result from an imbalance between ice mass gain/ inputs (snowfall, condensation, and occasional rainfall) and loss/outputs (iceberg discharge, melt runo, sublimation/evaporation, and eolian removal of snow).
Up to 100 times faster than the surrounding ice. Ice streams form major conduits between the ice sheet interior and margins (Alley and Whillans, 1991), discharging an estimated 90% of snow accumulating inland (McIntyre, 1985) and mainly feeding into ¯oating ice shelves. The latter comprise $40% of the Antarctic coastline. , 1992). , the Antarctic PeninsulaÐtemperatures typically remain suciently low throughout the year in Antarctica that there is virtually no surface melting. , 2004; Bingham and Rees, 1997; Frezzotti, Sec.