期刊
GLOBAL AND PLANETARY CHANGE
卷 126, 期 -, 页码 35-45出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.gloplacha.2015.01.002
关键词
Water storage anomalies; Drought; Yangtze River Basin; GRACE; ENSO
资金
- National Key Basic Research Program of China [2012CB957703, 2013CB733302]
- National Nature Science Foundation of China [41274025, 41321063, 41228004]
- Nature Science Foundation of Hubei [2011CDB400]
- National Science Council of Taiwan [101-2116-M-001-034-MY2]
Two severe drought events occurred in the Yangtze River Basin (YRB) of China in the summer of 2006 and the spring of 2011. We examine terrestrial water storage (TWS) changes in the YRB for these events using time-variable gravity data from the GRACE satellite mission, in combination with observations made by TRMM satellite and in situ river gauges, along with hydrological models GLDAS and WGHM. GRACE TWS deficit estimates clearly quantify these YRB droughts, and a normalized GRACE-based TWS anomaly provides an alternative and useful hydro-climatological index in the YRB. We find that an El Nino (La Nina) event is significantly correlated with high (low) TWS in the YRB with a phase lead of similar to 7-8 months, and the lower YRB is more sensitive to ENSO variability than the upper basin. The possible linkage between TWS anomaly and ENSO is raised in terms of physical mechanisms of influencing the precipitation over the YRB. (C) 2015 Elsevier B.V. All rights reserved.
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