1367 / 2019-08-09 19:41:10

Satellite-derived sea ice flux through Fram Strait and its link with atmosphere circulation

15、冰冻圈科学 > 专题4：海冰变化和过程监测及模拟

Fram Strait is the main gate between Arctic and Atlantic, serving as a major sink for multi-year ice and modulating the fresh water budget. It is also a key region of the interaction between atmosphere-sea ice-ocean. Here, we reconstruct nine years (from 2010 to 2019) sea ice volume export based on the combined retrieval of active (CryoSat-2) and passive (SMOS) satellite data. This new retrieved data alleviates sea ice thickness overestimation over this region caused by limited radar penetration by CryoSat-2. Besides, instead of defining a meridional or zonal gate to estimate sea ice export, we introduce Lagrangian tracking based approach to calculate sea ice volume flux. Compared with traditional method, lower uncertainty is attained for volume flux. Meanwhile, sea ice drift from OSI-SAF and high-resolution sea ice concentration from AMSR-E/2 are adopted. The link between sea ice export during winter time and atmosphere circulation such as Arctic Oscillation, North Atlamtic Oscillation and Arctic Dipole is also discussed.