Does the Green Great Wall effectively decrease dust storm intensity in China? A study based on NOAA NDVI and weather station data
Does the Green Great Wall effectively decrease dust storm intensity in China? A study based on NOAA NDVI and weather station data
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DOI：
10.1016/j.landusepol.2014.10.017
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发表时间：
2015-02
期刊：
影响因子：
7.1
通讯作者：
M. Tan;Xiubing Li
中科院分区：
文献类型：
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作者：
M. Tan;Xiubing Li
中国于1978年启动了“绿色长城”计划。然而，该计划的影响受到激烈的辩论。本研究比较了GGW计划实施地区与未实施地区植被指数的变化。随后，一个测量沙尘暴强度（DSI）的定义被提出，它更好地计算了沙尘事件的强度;它考虑了沙尘事件的频率，能见度和持续时间。结果表明，在GGW区，植被有很大的改善，而它的GGW区以外的变化显着。20世纪80年代中期，DSI显著下降，与研究区沙尘暴频率的变化不同。在扣除气候变化和人为压力的影响后，结果表明，GGW计划大大提高了植被指数，有效地降低了北方地区的DSI。
China launched its “Green Great Wall” (GGW) program in 1978. However, the effects of this program are subject to intense debate. This study compares changes in the vegetation index in regions where the GGW program has been implemented with those where it has not. Subsequently, a definition to measure dust storm intensity (DSI) was proposed that better calculates the intensity of dust events; it considers the frequency, visibility, and duration of dust events. The results show that in the GGW region, vegetation has greatly improved, while it varied dramatically outside the GGW region. In the mid-1980s, DSI decreased significantly, different from the changes in dust storm frequency in the study region. By discounting the effects of climatic change and human pressures, the results show that the GGW program greatly improved the vegetation index and effectively reduced DSI in northern China.