Atmospheric form drag coefficients over Arctic sea ice using remotely sensed ice topography data, spring 2009–2015

摘要: Sea ice topography significantly impacts turbulent energy/momentum exchange, e.g., atmospheric (wind) drag, over Arctic sea ice. Unfortunately, observational estimates of this contribution to drag variability are spatially and temporally limited. Here we present new the neutral form coefficient in early spring, using high-resolution Airborne Topographic Mapper elevation data from NASA's Operation IceBridge mission. We utilize a three-dimensional set combine with an existing parameterization scheme linking surface feature height spacing drag. To be consistent previous studies investigating compare these results those produced linear profiling set. The shows lower values ( 0.5–1 ×10−3) more deformed regimes Central (north Greenland Canadian Archipelago), which increase coastline proximity. show moderate interannual variability, including strong 2013 2014/2015 north Archipelago. extrapolated across Advanced Scatterometer satellite radar backscatter data, further highlighting regional/interannual variability. Finally, parameterizations floe edges (a function concentration) skin produce, our knowledge, first pan-Arctic total (in spring) 2009 2015.