Assessment of dust emissions and their controlling factors on the Hoh Xil, north-central part of the Qinghai-Tibetan plateau

IF 5.4 Q1 ENVIRONMENTAL SCIENCES Environmental and Sustainability Indicators Pub Date : 2024-09-27 DOI:10.1016/j.indic.2024.100487
Yawei Fan , Heqiang Du , Zhiwen Han , Xiufan Liu , Xinlei Liu , Zongxing Li
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Abstract

Dust emissions can lead to a series of environmental hazards and are thus a global concern. However, due to the difficulties of dust source identification, there are still great uncertainties in the calculation of dust yield on a global scale. The Qinghai-Tibetan Plateau presents some challenges for understanding the region's calculation of the global dust budget. To address these issues, the Hoh Xil Plateau, a typical dust source on the Qinghai-Tibetan Plateau, was selected as the study area for analyzing dust emission processes and associated influencing factors via a robust model. The results showed that dust emissions on the Hoh Xil Plateau occurred mainly in spring and winter. The wide distribution of bare land and sandy land on the Hoh Xil Plateau is the main reason for the high dust emissions. Wind speed is the dominant factor influencing annual dust emission, while precipitation and temperature were negatively correlated with the dust emission. The recession of expansive lakes in the region resulted in an increase in sandy lake-shores, which induced a potential increase in dust emissions. In addition, the effects of human activities on dust emissions were evident. Positive and negative effects on dust emission changes coexisted on the Hoh Xil Plateau and depended on the development of the county-level economy and the implementation of ecological engineering measures. We believe that this study will clarify the dust yield of the Qinghai-Tibetan Plateau and provide valuable information for understanding the driving factors that cause variations in aeolian processes on the Qinghai-Tibetan Plateau.
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青藏高原中北部呼日勒地区粉尘排放及其控制因素评估
粉尘排放会导致一系列环境危害,因此是全球关注的问题。然而,由于粉尘源识别困难,全球范围内粉尘产生量的计算仍存在很大的不确定性。青藏高原对了解该地区计算全球沙尘预算提出了一些挑战。针对这些问题,我们选择了青藏高原典型的沙尘源--呼日勒高原作为研究区域,通过稳健模型分析沙尘排放过程和相关影响因素。结果表明,霍希尔高原的沙尘排放主要发生在春季和冬季。呼日勒高原裸露土地和沙化土地分布广泛,是造成高粉尘排放的主要原因。风速是影响年沙尘排放量的主要因素,而降水和温度与沙尘排放量呈负相关。该地区广阔湖泊的退缩导致沙质湖岸的增加,从而诱发了潜在的沙尘排放增加。此外,人类活动对粉尘排放的影响也很明显。对呼市高原粉尘排放变化的积极和消极影响并存,取决于县级经济的发展和生态工程措施的实施。我们相信,这项研究将阐明青藏高原的降尘量,并为了解导致青藏高原风化过程变化的驱动因素提供有价值的信息。
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来源期刊
Environmental and Sustainability Indicators
Environmental and Sustainability Indicators Environmental Science-Environmental Science (miscellaneous)
CiteScore
7.80
自引率
2.30%
发文量
49
审稿时长
57 days
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