Temporal-spatial distribution of sand dust intensity during 1960-2020 in Liaoning

doi:10.7522/j.issn.1000-694X.2021.00130

Journal of Desert Research ›› 2022, Vol. 42 ›› Issue (2): 113-120.DOI: 10.7522/j.issn.1000-694X.2021.00130

Temporal-spatial distribution of sand dust intensity during 1960-2020 in Liaoning

Ming Zhao¹(), Chunxiao Zhou¹, Chong Li², Shuo Liu¹, Hujia Zhao³()

^1.Liaoning Meteorological Observatory，Shenyang 110166，China
^2.Shenyang Meteorological Observatory，Shenyang 110166，China
^3.Institute of Atmospheric Environment，China Meteorological Administration，Shenyang 110166，China

Received:2021-08-10 Revised:2021-09-30 Online:2022-03-20 Published:2022-03-30
Contact: Hujia Zhao

Abstract

Abstract:

Based on the surface observation data from 56 meteorological stations during 1960-2020 in Liaoning， the sand dust intensity index is used to analyze the dust weather of Liaoning. Applying regression equation， Mann-Kendall Test and correlation analysis， the paper investigate the spatial and temporal distribution of dust weather. The results indicate that the main dust weather affecting Liaoning is blowing dust， followed by floating dust and sand storms. The main dust weather is floating dust in the southeast and south part， while the other area is floating dust. The sand dust intensity in Liaoning has decreased significantly， especially since 2010. The strongest period is 1960-1979. The mutation occurred in 1988. The strongest monthly average sand dust intensity is in April. The high value areas of the sand dust intensity are in the northwest part in higher altitudes， with the fastest decrease， while the low value areas are in the southeast part in low altitudes. The intensity of sand dust is the strongest in spring， with the fastest decrease rate. The intensity of sand dust at Benxi has an increase rate in autumn， while other stations show a decreasing rate in all seasons. The decrease of the wind speed and the gale days， and the rise of the minimum temperature are the main reasons for the weakening of dust intensity in Liaoning.

Key words: dust weather, sand dust intensity index, temporal-spatial evolution, meteorological factors, Liaoning

CLC Number:

P458.11

Ming Zhao, Chunxiao Zhou, Chong Li, Shuo Liu, Hujia Zhao. Temporal-spatial distribution of sand dust intensity during 1960-2020 in Liaoning[J]. Journal of Desert Research, 2022, 42(2): 113-120.

Figures/Tables 8

Fig.1 Annual （A） and monthly mean （B）variation of floating dust， blowing dust and dust storm in Liaoning from 1960 to 2020

Fig.2 Annual （A） and monthly mean （B） variation of sand dust intensity in Liaoning from 1960 to 2020

Fig.3 Spatial distribution of average sand dust weather （A）， floating dust （B）， blowing dust （C）， dust storm （D） in Liaoning from 1960 to 2020

Fig.4 Spatial distribution of annual mean （A） and interannual rate（B）of sand dust intensity in Liaoning from 1960 to 2020

Fig.5 Spatial distribution of average sand dust intensity in spring （A）， summer （B）， autumn （C）， winter （D） in Liaoning from 1960 to 2020

Fig.6 Spatial distribution of interannual rate of dust intensity in spring （A）， summer （B）， autumn （C）， winter （D） in Liaoning from 1960 to 2020

Fig.7 Mann-Kendall mutation test of sand dust intensity in Liaoning from 1960 to 2020

Table 1 Influencing factors of sand dust intensity

影响因子	相关系数	年代气候倾向率
平均气温	-0.59^*	0.26 ℃^**
最高气温	-0.43^*	0.22 ℃^**
最低气温	-0.73^*	0.34 ℃^**
相对湿度	-0.07	-0.12%
年降水量	-0.05	-5.58 mm
3—5月降水量	-0.30^*	3.81 mm
平均风速	0.91^**	-0.20 m·s^{-1 **}
大风日数	0.87^**	-11.17 d^**

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Temporal-spatial distribution of sand dust intensity during 1960-2020 in Liaoning

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