Estimation on the dust lift amount and source contribution of the heavy dust weather in mid-March 2021 over Central East Asia

doi:10.7522/j.issn.1000-694X.2021.00144

Journal of Desert Research ›› 2022, Vol. 42 ›› Issue (1): 79-86.DOI: 10.7522/j.issn.1000-694X.2021.00144

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Estimation on the dust lift amount and source contribution of the heavy dust weather in mid-March 2021 over Central East Asia

Benli Liu¹^,²(), Wanyue Peng¹^,³, Shulin Liu¹, Ting Yang⁴

^1.Key Laboratory of Desert and Desertification /, Northwest Institute of Eco-Environment and Resources，Chinese Academy of Sciences，Lanzhou 730000，China
^2.Research Station of Gobi Desert Ecology and Environment in Dunhuang of Gansu Province, Northwest Institute of Eco-Environment and Resources，Chinese Academy of Sciences，Lanzhou 730000，China
^3.University of Chinese Academy of Sciences，Beijing 100049，China
^4.State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry，Institute of Atmospheric Physics，Chinese Academy of Sciences，Beijing 100029，China

Received:2021-08-23 Revised:2021-10-18 Online:2022-01-20 Published:2022-01-28

Abstract

Abstract:

In the middle of March 2021， a persistent dust weather broke out in central East Asia including most parts of northern China， which aroused people's high attention to the dust source area and the benefit of the ecological construction project. Using high precision and large range of meteorological data， this paper calculated the dust driving conditions on the ground and the sand transport conditions during the strong wind process， and estimated the dust lift amounts at different hours. Then， the dust contribution rates of Mongolia and northern China were obtained for the days of 14th and 15th. The results show that， compared with the past ten years， northern China is not prone to emit dust， while desert areas in central and eastern Mongolia tend to rise more dust due to significant temperature increase and decreased precipitation. It shows that 75% of the dust in the strong dust storm in Beijing on March 15 was raised on the 14th in Mongolia， while 84% of the dust in the followed larger storm on the 16th and 17th was raised from North and Northwest China on the 15th. The total dust amounts inside and outside the border are basically the same.

Key words: dust storm, Central East Asia, dust lift amount, climate change

CLC Number:

P458.11

Benli Liu, Wanyue Peng, Shulin Liu, Ting Yang. Estimation on the dust lift amount and source contribution of the heavy dust weather in mid-March 2021 over Central East Asia[J]. Journal of Desert Research, 2022, 42(1): 79-86.

Figures/Tables 7

Fig.1 Infrared difference dust index （IDDI） from FY-2 meteorological satellite across central East Asia on the day of Mar 15 （A） and Mar 17 （B）

Fig.2 Changes of climatic factors at March 2021 compared to the average values of the past 10 years

Fig.3 The dune activity indexes at March 2021 （A） and their variations compared to the average of past 10 years （B）

Fig.4 Sand drift potentials （kg·m-1·h-1） across central East Asia at representative hours of March 14 and 15

Fig.5 Dust lift amount （kg·m-1） at different hours of March 14

Fig.6 Dust lift amount （kg·m-1） at different hours of March 15

Fig.7 Overgrazing at Altai Province （A， photo taken on Jun 4， 2019） and land desertification at Ovorhangay Province （B， photo taken on Jun 4， 2019） of Mongolia

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Estimation on the dust lift amount and source contribution of the heavy dust weather in mid-March 2021 over Central East Asia

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