Temporal Remote Sensing of Seasonal Inundation and Ice Breakup on Arctic Russian Rivers: Controls on Water, Sediment, and Nutrient Delivery to the Arctic Ocean

该项目旨在更好地了解从陆地表面流向北冰洋的淡水径流的时间、数量和生物地球化学。河流、三角洲和河口经历或影响着与全球变化问题相关的各种过程，如温室气体排放、地表能量平衡、生物地球化学循环，以及向北极大陆架环境输送淡水、沉积物和营养物质。拟议的研究将使用多时相高分辨率合成孔径雷达（SAR）和可见光/近红外卫星数据，结合俄罗斯地面站观测，评估：(1)向北冰洋输送淡水的时间和数量；(2)陆地表面季节性淹没的时间和程度，以及与周围水生生态系统积极交换水、沉积物和营养物质的河流的识别；(3)温度、河流流出量与河流、河口和陆架冰冻结/破裂的关系。

ABSTRACT OPP-9708997 SMITH UNIV. CALIFORNIA, LOS ANGELES This project is designed to achieve a better understanding of the timing, volume, and biogeochemistry of freshwater runoff from the land surface to the Arctic Ocean. Rivers, deltas, and estuaries experience or influence a variety of processes that are relevant to problems of global change, such as greenhouse gas emissions, the surface energy balance, and biogeochemical cycling, and the delivery of freshwater, sediment, and nutrients to the Arctic shelf environment. The proposed study would use multi-temporal high resolution synthetic aperture radar (SAR) and visible/near-infrared satellite data in combination with Russian ground station observations to assess: (1) the timing and volume of freshwater delivery to the Arctic Ocean; (2) the timing and magnitude of seasonal inundation of the land surface, and the indentification of those rivers that actively exchange water, sediment, and nutrients with surrounding aquatic ecosystems; and (3) the relationship between temperature, river outflows, and freeze-up/break-up of river, estuary, and shelf ice.