| 利用GRACE监测中国区域干旱及其影响因素分析 |
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| 引用本文： | 李杰,范东明,游为.利用GRACE监测中国区域干旱及其影响因素分析[J].大地测量与地球动力学,2019,39(6):587-595. |
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| 作者姓名： | 李杰 范东明 游为 |
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| 作者单位： | 西南交通大学地球科学与环境工程学院,成都市犀安路999号,611756;西南交通大学地球科学与环境工程学院,成都市犀安路999号,611756;高速铁路运营安全空间信息技术国家地方联合工程实验室,成都市犀安路999号,611756 |
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| 基金项目： | 国家自然科学基金;国家自然科学基金;国家自然科学基金 |
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| 摘 要： | 利用2003-01~2012-12的GRACE时变地球重力场模型计算我国长江中下游平原、西南地区和华北平原陆地水储量变化的时间序列。结果表明，长江中下游平原和华北平原的陆地水储量变化量最低值在2011-05，西南地区最低值在2010-03。根据陆地水储量变化的水平衡原理计算3个区域地下水储量变化情况。结果表明，长江中下游平原和西南地区地下水储量呈缓慢增长的趋势，增长速率分别为0.54 mm/月和0.34 mm/月；华北地区呈缓慢减小的趋势，减小速率为0.33 mm/月。3个区域干旱时期地下水储量的亏损情况分别为：长江中下游平原-21.31 mm/月，华北平原-19.88 mm/月，西南地区-15.72 mm/月。最后，用NOAA发布的月降雨和气温数据对3个区域干旱期间的降雨量和蒸发量进行量化，分析3次干旱产生的原因。结果表明，西南地区2010年春季干旱的主要原因是气温异常，长江中下游平原和华北平原2011年干旱的主要原因是降雨量偏少。
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| 关 键 词： | GRACE时变地球重力场模型 GLDAS 干旱研究 地下水储量 亏损率 |
Using GRACE to Monitor Regional Drought in China and Its Influencing Factors |
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| LI Jie,FAN Dongming,YOU Wei.Using GRACE to Monitor Regional Drought in China and Its Influencing Factors[J].Journal of Geodesy and Geodynamics,2019,39(6):587-595. |
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| Authors: | LI Jie FAN Dongming YOU Wei |
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| Abstract: | In order to study the drought conditions in the middle and lower reaches of the Yangtze river, the southwestern region, and the north China plain, we use the GRACE time-varying earth gravity field model from 2003-01 to 2012-12 to calculate the changes in the terrestrial water reserves of the three regions. The results show the lowest value of land water storage change of the middle and lower reaches of the Yangtze river plain and the north China plain occur in May 2011, and in the southwest region the lowest value is in March 2010. According to the water balance principle of land water reserves change, we calculate the changes of groundwater reserves in the three regions. The groundwater reserves in the middle and lower reaches of the Yangtze river and the southwestern region are slowly increasing with rates of 0.54 mm/month and 0.34 mm/month. The trend reduces to a rate of 0.33 mm/month in the north China plain. The loss of groundwater reserves in the three regions during the dry period are: -21.31 mm/month in the middle and lower reaches of the Yangtze river, -19.88 mm/month in the north China plain, and -15.72 mm/month in the southwest. Finally, we use the monthly rainfall and temperature data released by NOAA to quantify the rainfall and evaporation in the three regions during the drought period. The main cause of drought in the southwestern in the spring 2010 is the temperature anomaly. The main reason for the drought of the north China plain and the middle and lower reaches of the Yangtze river in 2011 is the lack of rainfall. |
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| Keywords: | GRACE time-varying earth gravity field model GLDAS drought research groundwater reserves loss rate |
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