Satellite gravimetry-based analysis of terrestrial water storage and its relationship with run-off from the Lena River in eastern Siberia
Satellite gravimetry-based analysis of terrestrial water storage and its relationship with run-off from the Lena River in eastern Siberia
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DOI：
10.1080/01431161.2016.1165890
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发表时间：
2016-04
影响因子：
3.4
通讯作者：
Kazuyoshi Suzuki;K. Matsuo;T. Hiyama
中科院分区：
文献类型：
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作者：
Kazuyoshi Suzuki;K. Matsuo;T. Hiyama
摘要我们使用了从2002年4月到2015年8月的重力恢复和气候实验（GRACE）的146个月数据来分析勒拿河流域的陆地水储存（TWS）。我们研究了TWS值和勒拿河的年径流量之间的滞后相关性，并发现一个给定的一年的河流径流量和TWS在11月的前一年之间有很强的线性关系。这种关系持续了整个冬天，直到次年5月。我们还发现了一个负面的趋势TWS在下游部分的勒拿河流域，这可能是由增加蒸散量与夏季气温变暖。更好地了解北极淡水循环将需要更多的GRACE数据和河流径流数据。
ABSTRACT We used 146 months of data from the Gravity Recovery and Climate Experiment (GRACE) spanning the period from April 2002 to August 2015 to analyse terrestrial water storage (TWS) in the Lena River basin. We examined the lag correlation between TWS values and the annual run-off from the Lena River and found a strong linear relationship between a given year’s river run-off and the TWS during November of the previous year. This relationship persisted throughout the winter until the following May. We also found a negative trend in TWS in the downstream portion of the Lena River basin, which might be explained by increasing evapotranspiration associated with warming summer air temperatures. A better understanding of the Arctic freshwater cycle will require additional GRACE data and river run-off data.