气候变化领域集成服务门户(CCPortal): Biological crust in sand and dust storm source areas of Asia and its impact on dust emission

CCPortal

DOI	10.1016/j.accre.2021.05.007
	Biological crust in sand and dust storm source areas of Asia and its impact on dust emission
	Zhang J.; Zhou C.-H.; Gui H.-L.; Zhang X.-Y.
发表日期	2021
ISSN	1674-9278
起始页码	395
结束页码	408
卷号	12 期号:3
英文摘要	Even though the biological crusts are critical to dust emissions, no sand and dust forecast model have considered the impacts of the biological crust in dust emission scheme. This situation mainly comes from two scientific difficulties: there is no large scale regional biological crust data available that can be used in the forecast model; there is no quantification of how biological crusts impact on sand emission. In this way, we studied the distribution of biological soil crust in sand and dust storm source areas of Central and East Asia using Moderate Resolution Imaging Spectroradiometer satellite surface reflectance data collected in 2000–2019 to determine its potential impact on dust emission according to two empirical schemes. We further evaluated the relationships between soil crust coverage, roughness length, and dust emission to study SDS source areas. We found that biological crust is widely distributed in SDS source areas of Central and East Asia, with coverage rates of 19.8% in Central Asian deserts, 23.1% in the Gobi Desert, and 17.3%–32.8% in Chinese deserts (p > 0.05). Cyanobacteria and lichen coverage has increased in Chinese deserts, reflecting the recent impacts of the Project of Returning Farmland to Grassland and Farmland to Forests. However, biological soil crust coverage has not increased in Central Asian deserts or the Gobi Desert, and that in Central Asian deserts continues to decrease, demonstrating the complexity of the combined effects of human activities and climate change on its distribution. Biological soil crust increased the roughness length of Central and East Asian SDS source areas by 0.14–0.62 mm. The suppression of dust emission due to biological soil crust did not change among years during the study period. The horizontal and vertical dust flux inhibition coefficient (DFIC) were 2.0–11.0 and 1.7–2.9 (p > 0.05), respectively, clearly showing a suppressive effect. Improvement of the ecological environment in some deserts can lead to the ability of these crusts to inhibit dust erosion errors that must be considered in the dust emission scheme for areas where crust coverage has improved. © 2021 The Authors
英文关键词	Biological soil crust; Central and East Asia; Dust emission; Sand and dust storm source; Satellite retrieval
来源期刊	Advances in Climate Change Research
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/236474
作者单位	State Key Laboratory of Severe Weather and Key Laboratory of Atmospheric Chemistry of China Meteorological Administration & Institute of Atmospheric Composition, Chinese Academy of Meteorological Sciences, Beijing, 100081, China; National Meteorological Center, China Meteorological Administration, Beijing, 100081, China; Center for Excellence in Regional Atmospheric Environment, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, 361021, China
推荐引用方式 GB/T 7714	Zhang J.,Zhou C.-H.,Gui H.-L.,et al. Biological crust in sand and dust storm source areas of Asia and its impact on dust emission[J],2021,12(3).
APA	Zhang J.,Zhou C.-H.,Gui H.-L.,&Zhang X.-Y..(2021).Biological crust in sand and dust storm source areas of Asia and its impact on dust emission.Advances in Climate Change Research,12(3).
MLA	Zhang J.,et al."Biological crust in sand and dust storm source areas of Asia and its impact on dust emission".Advances in Climate Change Research 12.3(2021).