Inter-comparison of snow depth over Arctic sea ice from reanalysis reconstructions and satellite retrieval Journal Article uri icon

Overview

abstract

  • Abstract. In this study, we compare eight recently developed snow depth products over Arctic sea ice, which; use satellite observations, modeling, or a combination of satellite and modeling approaches. These; products are further compared against various ground-truth observations, including those from ice; mass balance observations and airborne measurements. Large mean snow depth discrepancies are; observed over the Atlantic and Canadian Arctic sectors. The differences between climatology and; the snow products early in winter could be in part a result of the delaying in Arctic ice; formation that reduces early snow accumulation, leading to shallower snowpacks at the start of; the freeze-up season. These differences persist through spring despite overall more winter snow; accumulation in the reanalysis-based products than in the climatologies. Among the products; evaluated, the University of Washington (UW) snow depth product produces the deepest spring; (March–April) snowpacks, while the snow product from the Danish Meteorological Institute (DMI); provides the shallowest spring snow depths. Most snow products show significant correlation with; snow depths retrieved from Operational IceBridge (OIB) while correlations are quite low against; buoy measurements, with no correlation and very low variability from University of Bremen and DMI; products. Inconsistencies in reconstructed snow depth among the products, as well as differences; between these products and in situ and airborne observations, can be partially attributed to; differences in effective footprint and spatial–temporal coverage, as well as insufficient; observations for validation/bias adjustments. Our results highlight the need for more targeted; Arctic surveys over different spatial and temporal scales to allow for a more systematic; comparison and fusion of airborne, in situ and remote sensing observations.;

publication date

  • January 27, 2021

Date in CU Experts

  • June 28, 2021 10:09 AM

Full Author List

  • Zhou L; Stroeve J; Xu S; Petty A; Tilling R; Winstrup M; Rostosky P; Lawrence IR; Liston GE; Ridout A

author count

  • 12

Other Profiles

Electronic International Standard Serial Number (EISSN)

  • 1994-0424

Additional Document Info

start page

  • 345

end page

  • 367

volume

  • 15

issue

  • 1