Connections Among Atmospheric Forcing, Runoff and Conditions in the Laptev and East-Siberian Seas

本研究拟评估大气强迫在连系勒拿河、亚纳河、印季尔卡河和科雷马河流域的陆地水文与河流水向拉普捷夫海和东西伯利亚海的输送和命运方面的作用。潜在的假设将北极气候变化的因素，如飓风频率和变暖，与永久冻土融化和河流径流增加相结合，进而导致溶解和固体陆地物质增加到大陆架海洋。此外，据推测，北极中部大气环流的气旋和反气旋模式之间的变化，响应于北极涛动（AO）的分阶段，驱动了拉普捷夫海和东西伯利亚海的环境变化。将通过获取、综合和分析列拿河-拉普捷夫海和东西伯利亚陆架系统的大气、陆地和海洋水文以及水化学数据来检验这些假设。这项研究将包括分析2000年和2002年从拉普捷夫海和东西伯利亚海获得的两组现有的冷冻水、沉积物和颗粒物样本。

This research proposes to assess the role of atmospheric forcing in linking land hydrology in the watersheds of the Lena, Yana, Indigirka and Kolyma rivers with the transport and fate of riverine waters to the Laptev and East Siberian seas. The underlying hypothesis couples elements of Arctic climate change, such as cyclone frequency and warming, with permafrost melting and increased river runoff that lead, in turn, to increased flux of dissolved and solid terrestrial matter to the shelf seas. It is hypothesized, additionally, that shifts between the cyclonic and anticyclonic modes of atmospheric circulation over the central Arctic, in response to the phasing of the Arctic Oscillation (AO), drive environmental shifts in the Laptev and East Siberian seas. These hypotheses will be tested through acquisition, syntheses and analyses of atmospheric, land and ocean hydrological, and hydrochemical data for the Lena River-Laptev Sea and East Siberian land-shelf systems. The research will involve analyses of two existing sets of frozen water, sediment and particulate matter samples obtained in 2000 and 2002 from the Laptev and East Siberian seas.