荒漠化导致的中国潜在风尘释放量时空变化特征数据集（1970-2015年）

揭示土地荒漠化（沙漠化）过程中沙化地表沙尘释放量的时空变化特征，并与戈壁地表沙尘释放量进行了对比。风洞试验揭示了沙漠化土地和戈壁地表对于不同粒径风尘颗粒的释放能力，证明沙漠化土地风尘释放能力高于戈壁地表，2000后戈壁地表沙尘释放率有所上升；与1970s相比，2000年后沙漠化地表和戈壁地表的PM50释放量分别降低了75%和71%。研究表明1970s以来，中国北方潜在风尘源区及风尘释放强度都发生了显著的时空变化。

This research unveils the spatiotemporal variation characteristics of dust emissions from desertified lands during the process of land desertification, and makes a comparative analysis with dust emissions from Gobi surfaces. Wind tunnel experiments reveal the dust emission capacities of desertified lands and Gobi surfaces for dust particles of different sizes, proving that the dust emission capacity of desertified lands is higher than that of Gobi surfaces, and the dust emission rate of Gobi surfaces has increased post-2000. Compared with the levels in the 1970s, the PM50 emissions from desertified lands and Gobi surfaces post-2000 decreased by 75% and 71%, respectively. The findings indicate that since the 1970s, both the potential dust source areas and dust emission intensities in northern China have undergone significant spatiotemporal changes.