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首页> 外文期刊>Geophysical Research Letters >Multidecadal increases in the Yukon River Basin of chemical fluxes as indicators of changing flowpaths, groundwater, and permafrost
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Multidecadal increases in the Yukon River Basin of chemical fluxes as indicators of changing flowpaths, groundwater, and permafrost

机译：育空河流域化学流量的数十年增加是流径，地下水和多年冻土变化的指标

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摘要

The Yukon River Basin, underlain by discontinuous permafrost, has experienced a warming climate over the last century that has altered air temperature, precipitation, and permafrost. We investigated a water chemistry database from 1982 to 2014 for the Yukon River and its major tributary, the Tanana River. Significant increases of Ca, Mg, and Na annual flux were found in both rivers. Additionally, SO4 and P annual flux increased in the Yukon River. No annual trends were observed for dissolved organic carbon (DOC) from 2001 to 2014. In the Yukon River, Mg and SO4 flux increased throughout the year, while some of the most positive trends for Ca, Mg, Na, SO4, and P flux occurred during the fall and winter months. Both rivers exhibited positive monthly DOC flux trends for summer (Yukon River) and winter (Tanana River). These trends suggest increased active layer expansion, weathering, and sulfide oxidation due to permafrost degradation throughout the Yukon River Basin.
机译：育空河流域被不连续的多年冻土所覆盖，上个世纪经历了气候变暖，改变了气温，降水和多年冻土。我们调查了1982年至2014年育空河及其主要支流塔纳纳河的水化学数据库。两条河流中的Ca，Mg和Na年通量均显着增加。此外，育空河的SO4和P年通量增加。从2001年到2014年，没有观察到溶解有机碳（DOC）的年度趋势。在育空河中，全年Mg和SO4流量增加，而Ca，Mg，Na，SO4和P流量的一些最积极的趋势。发生在秋季和冬季。两条河流在夏季（育空河）和冬季（塔纳纳河）均表现出月度DOC流量的正趋势。这些趋势表明，由于整个育空河流域的多年冻土退化，活动层膨胀，风化和硫化物氧化作用增加。

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