A climatic index for aeolian desertification in northern China and its application to dust storm frequency
A climatic index for aeolian desertification in northern China and its application to dust storm frequency
复制标题
中国北方风沙化气候指数及其在沙尘暴频率中的应用
DOI：
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发表时间：
2021
期刊：
影响因子：
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通讯作者：
Yu Ren
中科院分区：
文献类型：
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作者：
Zhen-Ting Wang;Ying-Ying Wu;Yu Ren
风沙化是我国北方主要的荒漠化类型。在利用气候模型预测未来荒漠化趋势时，必须建立气候变量与荒漠化指标之间的可靠关系。植被对气候变化和荒漠化同时敏感。中国北方风沙化过程的一个基本特征是风沙活动在当年进行植被生长季。在这项研究中，这种滞后效应的荒漠化对气候变化的风蚀和植被生长模型来描述。建立了由风速、降水和温度组成的无量纲风沙化指数。沙尘源区沙尘暴频率的时间变化趋势证实了该方法的适用性。
Aeolian desertification is the dominant desertification type in northern China. The robust relations between climate variables and desertification indicators must be established while predicting the future desertification trends by using climate models. Vegetations are sensitive to climate change and desertification simultaneously. A basic feature of aeolian desertification process in northern China is that aeolian sand and dust activities proceed the vegetation growth season in the same year. In this study, such a lagging effect of desertification to climate change is described by the wind erosion and vegetation growth models. A non-dimensional aeolian desertification index composed of wind speed, precipitation and temperature is constructed. Its applicability is confirmed by the temporal trends of dust storm frequency in the dust source regions.