| GRACE估算陆地水储量季节和年际变化 |
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| 引用本文： | 杨元德,鄂栋臣,晁定波,汪海洪.GRACE估算陆地水储量季节和年际变化[J].地球物理学报,2009,52(12):2987-2992. |
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| 作者姓名： | 杨元德 鄂栋臣 晁定波 汪海洪 |
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| 作者单位： | 1.武汉大学测绘学院中国南极测绘研究中心，武汉 430079;2.武汉大学测绘学院，武汉 430079 |
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| 基金项目： | 国家高技术研究发展计划(863)专题课题，国家973计划项目，国家测绘局南极考察地区基础测绘项目，国家科技支撑计划项目 |
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| 摘 要： | 利用最新公布的GRACE GFZ RL04数据，分析了2003年1月～2007年12月全球27条流域和陆地水储量的季节性和年际变化.结果表明，相近流域季节性变化相位接近.2003年1月～2007年12月陆地水储量季节性变化为1572.4 km3，其中变化最大流域为亚马逊河，其次分别为鄂毕河、尼罗河和尼日尔河等流域.5年来 GRACE陆地水储量的年际变化为-75.4±40.3 km3/a，其中亚马逊河、勒拿河和马更些河等流域的年际变化呈现正增长，而刚果河、密西西比河、恒河、育空河和雅鲁藏布江等流域则相反.GRACE与GLDAS数据均表明2006年后陆地水储量年际变化存在明显增加.
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| 关 键 词： | GRACE 陆地水储量 GLDAS 季节性变化 年际变化 |
| 收稿时间： | 2008-11-11 |
| 修稿时间： | 2009-11-27 |
Seasonal and inter-annual change in land water storage from GRACE |
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| YANG Yuan-De,E Dong-Chen,CHAO Ding-Bo,WANG Hai-Hong.Seasonal and inter-annual change in land water storage from GRACE[J].Chinese Journal of Geophysics,2009,52(12):2987-2992. |
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| Authors: | YANG Yuan-De E Dong-Chen CHAO Ding-Bo WANG Hai-Hong |
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| Affiliation: | 1.Chinese Antarctic Center of Surveying and Mapping, School of Geodesy and Geomatics，Wuhan University, Wuhan 430079, China;2.School of Geodesy and Geomatics，Wuhan University, Wuhan 430079, China |
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| Abstract: | Land water storage changes over 27 large river basins worldwide are calculated from updated monthly RL04 GRACE geoid solutions computed at GFZ from January 2003 to December 2007. Neighborhood basins show similar seasonal phase. The results indicate that the seasonal amplitude in land water storage is 1572.4 km3 from January 2003 to December 2007. The largest annual water volume change is found in the Amazon basin, followed by the Ob, Nile and Niger. Over the 5-year time span, the inter-annual change is about -75.4±40.3 km3/a, while positive trends shown in the Amazon, Lena and Mckenzie basins, and negative in Congo, Mississippi, Yukon, Ganges and Yarlung Zangbo basins. The inter-annual change in land water storage has been increasing since 2006 from both GRACE and GLDAS. |
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| Keywords: | GRACE Land water storage GLDAS Seasonal change Inter-annual change |
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