Suspended sediment and carbonate transport in the Yukon River Basin, Alaska: Fluxes and potential future responses to climate change
Suspended sediment and carbonate transport in the Yukon River Basin, Alaska: Fluxes and potential future responses to climate change
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DOI：
10.1029/2008wr007546
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发表时间：
2009-06-11
影响因子：
5.4
通讯作者：
Striegl, Robert G.
中科院分区：
文献类型：
--
作者：
Dornblaser, Mark M.;Striegl, Robert G.
在2001-2005水年（2000年10月1日至2005年9月30日）的育空地区，塔纳纳，豪猪河在阿拉斯加的三个地点的悬浮泥沙和碳酸盐的负荷和产量进行了测量和建模。每年从育空地区三角洲上游输出的悬浮泥沙和碳酸盐平均分别为68 Mt a（-1）和387 Gg a（-1），其中50%的悬浮泥沙负荷来自塔纳纳河流域，88%的碳酸盐负荷来自怀特河流域。每年约有一半的悬浮泥沙输出发生在春季，一半发生在夏秋季，在冬季输出很少。平均而言，每年至少有11 Mt a（-1）的悬浮沉积物沉积在阿拉斯加州伊格尔市和阿拉斯加州领航站之间的洪泛区，主要是在育空地区平原。由于沉积和溶解的共同作用，史蒂文斯村附近的鹰河和育空地区河之间的碳酸盐负荷损失约为27%，史蒂文斯村和试验站之间的碳酸盐负荷损失约为29%。塔纳纳河的悬移质负荷的比较表明，悬移质产沙量和太平洋年代际振荡之间可能存在联系。
Loads and yields of suspended sediment and carbonate were measured and modeled at three locations on the Yukon, Tanana, and Porcupine Rivers in Alaska during water years 2001-2005 (1 October 2000 to 30 September 2005). Annual export of suspended sediment and carbonate upstream from the Yukon Delta averaged 68 Mt a(-1) and 387 Gg a(-1), respectively, with 50% of the suspended sediment load originating in the Tanana River Basin and 88% of the carbonate load originating in the White River Basin. About half the annual suspended sediment export occurred during spring, and half occurred during summer-autumn, with very little export in winter. On average, a minimum of 11 Mt a(-1) of suspended sediment is deposited in floodplains between Eagle, Alaska, and Pilot Station, Alaska, on an annual basis, mostly in the Yukon Flats. There is about a 27% loss in the carbonate load between Eagle and Yukon River near Stevens Village, with an additional loss of about 29% between Stevens Village and Pilot Station, owing to a combination of deposition and dissolution. Comparison of current and historical suspended sediment loads for Tanana River suggests a possible link between suspended sediment yield and the Pacific decadal oscillation.