Remote Sensing Research
Mapping and Characterization of Recurring Spring Leads and Landfast Ice in the Beaufort and Chukchi Seas
The aim of this project is to map and document changes in the spatial and temporal distribution of recurring lead systems and coastal polynyas off the coast of northern Alaska in the Chukchi Sea between Wainwright and Barrow and the Beaufort Sea between Barrow and the Mackenzie River Delta.
Linkages Between Riverine Freshwater Dispersal, Sea-ice Formation and Large-scale sediment transport in the Central and East Siberian Arctic
Entrainment and transport of sediments by sea ice were investigated in the Siberian Arctic based on field measurements, remote sensing and numerical modeling. Freshwater dispersal from the Lena and other major rivers was found to contribute substantially to the fast ice cover, impacting entrainment of sediments and shelf hydrography. Sediment entrainment depended on river discharge and meteorological conditions controlling vertical mixing and dispersion of low-salinity water over the shallow shelf. The fraction of sediment-laden ice that is exported from the shelf is an important term in the sediment and organic carbon budget of the deeper basins.