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| Drought Change Trend Using MODIS TVDI and Its Relationship with Climate Factors in China from 2001 to 2010 |
| LIANG Liang, ZHAO Shu-he, QIN Zhi-hao, HE Ke-xun, CHEN Chong, LUO Yun-xiao |
1、School of Geographic and Oceanographic Sciences, Nanjing University, Nanjing 210023, P.R.China
2、School of Geodesy and Geomatics, Jiangsu Normal University, Xuzhou 221116, P.R.China
3、Jiangsu Provincial Key Laboratory of Geographic Information Science and Technology, Nanjing University, Nanjing 210023, P.R.China
4、Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, P.R.China |
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摘要 Changes in drought trends and its relationship with climate change in China were examined in this study. The temperature vegetation drought index (TVDI) datasets recorded during 2001 to 2010 in China were constructed by using the moderateresolution imaging spectroradiometer (MODIS) data, and the temporal and spatial variations in drought were analyzed. In addition, the mean temperature, mean precipitation, mean relative humidity, and mean sunshine duration data collected from 557 local weather stations in China were analyzed. The relationships between drought and these climate factors were also analyzed by using correlation analysis and partial correlation analysis. Changes in drought tendency were shown to differ among four regions throughout the country. The fluctuations in climate in the regions of northeastern China, Qinling-Huaihe, and central Qinghai were caused by the increase in soil moisture, and that in southern Tibet was caused by the intensification of drought. Meteorological factors exhibited varied effects on drought among the regions. In southern China, the main influential factor was temperature; other factors only showed minimal effects. That in the northern and northwestern regions was sunshine duration, and those in the Qinghai-Tibet Plateau were relative humidity and temperature.
Abstract Changes in drought trends and its relationship with climate change in China were examined in this study. The temperature vegetation drought index (TVDI) datasets recorded during 2001 to 2010 in China were constructed by using the moderateresolution imaging spectroradiometer (MODIS) data, and the temporal and spatial variations in drought were analyzed. In addition, the mean temperature, mean precipitation, mean relative humidity, and mean sunshine duration data collected from 557 local weather stations in China were analyzed. The relationships between drought and these climate factors were also analyzed by using correlation analysis and partial correlation analysis. Changes in drought tendency were shown to differ among four regions throughout the country. The fluctuations in climate in the regions of northeastern China, Qinling-Huaihe, and central Qinghai were caused by the increase in soil moisture, and that in southern Tibet was caused by the intensification of drought. Meteorological factors exhibited varied effects on drought among the regions. In southern China, the main influential factor was temperature; other factors only showed minimal effects. That in the northern and northwestern regions was sunshine duration, and those in the Qinghai-Tibet Plateau were relative humidity and temperature.
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Received: 11 September 2013
Accepted:
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| Fund: This research is supported by the National Basic Research Program of China (2010CB951503), the China Postdoctoral Science Foundation (2013M531329) and the Natural Science Foundation of Jiangsu Province, China (BK2012145). |
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Corresponding Authors:
ZHAO Shu-he, Tel: +86-25-89681015, E-mail: zhaosh@nju.edu.cn; QIN Zhi-hao, Mobile: 13521350214, E-mail: zhihaoqin@163.com
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Cite this article:
LIANG Liang, ZHAO Shu-he, QIN Zhi-hao, HE Ke-xun, CHEN Chong, LUO Yun-xiao.
2014.
Drought Change Trend Using MODIS TVDI and Its Relationship with Climate Factors in China from 2001 to 2010. Journal of Integrative Agriculture, 13(7): 1501-1508.
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