干旱区研究

Arid Zone Research >

2021 , Vol. 38 >Issue 4: 1040 - 1047

DOI: https://doi.org/10.13866/j.azr.2021.04.15

Weather and Climate

Spatiotemporal characteristics and influencing factors of dust weather in Qaidam Basin in recent 60 years

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  • 1. Huangnan Meteorological Bureau of Qinghai Province, Tongren 811399, Qinghai, China
    2. Qinghai Key Laboratory for Disaster Prevention and Mitigation, Xining 810001, Qinghai, China
    3. Meteorological Station of Qinghai Province, Xining 810001, Qinghai, China
    4. Haidong Meteorological Bureau of Qinghai Province, Ping’an 810600, Qinghai, China
    5. Haixi Meteorological Bureau of Qinghai Province, Delingha 817000, Qinghai, China
    6. Climate Center of Qinghai Province, Xining 810001, Qinghai, China

Received date: 2019-09-30

  Revised date: 2020-11-22

  Online published: 2021-08-03

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Abstract

This study analyzes the spatial-temporal variation in sand-dust weather and its influencing factors in Qaidam Basin. Meteorological data on blowing sands, floating dusts, sandstorms, temperature, precipitation, and relative humidity were analyzed for 58 years from nine representative stations in Qaidam Basin using the Mann-Kendall test, wavelet analysis, and other statistical methods. According to the results, the number of days of blowing sands, floating dusts, and sandstorms in the region over the past 58 years has dropped significantly, with the number of days with sand-dust weather being highest in the 1970s and lowest in the 2000s. The number of days of sand-blowing changed abruptly in 1997 and showed a downward trend after the sudden change. The number of sandstorm days had a long period of 10-15 years and a short period of 5-7 years, the number of blowing sand days also had a long period of 10-15 year, and the number of floating dust days had no evident periodicity. There was more sand-dust weather in the southwest of the basin and less in the northeast of the basin. The number of days of blowing sands, floating dusts, and sandstorms were positively correlated with air pressure, gale days, and area and intensity of polar eddies in Asia, and they were negatively correlated with temperature and area and intensity of subtropical highs in the Western Pacific, Tibetan Plateau, Indo-Burma Trough, and Indian Ocean warm pool.

Key words： days of blowing sands; days of floating dusts; days of sandstorm; spatial-temporal variations; Qaidam Basin

Cite this article

CHEN Jing,GUO Xiaoning,BAI Wenjuan,WEN Xia,YANG Yanhua . Spatiotemporal characteristics and influencing factors of dust weather in Qaidam Basin in recent 60 years[J]. Arid Zone Research, 2021 , 38(4) : 1040 -1047 . DOI: 10.13866/j.azr.2021.04.15

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