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

拉普捷夫海和东西伯利亚海的大气强迫、径流和条件之间的联系

• 批准号: 0230455
• 负责人: Igor Semiletov
• 金额: $ 18.74万
• 依托单位: University of Alaska Fairbanks Campus
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2003
• 资助国家: 美国
• 起止时间: 2003-01-01 至 2004-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0230455&HistoricalAwards=false
• 关键词: Connections; Among; Atmospheric; Forcing; Runoff

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.

本研究建议评估大气强迫的作用，在连接土地水文流域的Lena，Yana，Indigirka和科雷马河的河流沃茨的运输和命运的拉普捷夫和东西伯利亚海。 基本假设将北极气候变化的要素，如气旋频率和变暖，与永久冻土融化和河流径流增加结合起来，这反过来又导致溶解和固体陆地物质流入陆架海的流量增加。 据推测，此外，在北极中部的大气环流的气旋和反气旋模式之间的转变，在响应北极涛动（AO）的定相，驱动环境的变化在拉普捷夫和东西伯利亚海。 这些假设将通过获取，合成和分析大气，陆地和海洋水文，水化学数据的Lena河，拉普捷夫海和东西伯利亚大陆架系统进行测试。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套现有的冰冻水、沉积物和颗粒物质样本。