[1]LUO Xiaoling,LI Yanying,YAN Zhiming,et al.Evolution Characteristics of Sandstorm and Meteorological Influence Factors in Hexi Corridor in Recent 60 Years[J].Research of Soil and Water Conservation,2021,28(05):254-260.
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Evolution Characteristics of Sandstorm and Meteorological Influence Factors in Hexi Corridor in Recent 60 Years
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
28
Number of periods:
2021 05
Page number:
254-260
Column:
Public date:
2021-08-20
- Title:
- Evolution Characteristics of Sandstorm and Meteorological Influence Factors in Hexi Corridor in Recent 60 Years
- Keywords:
- sandstorm; elements evolution characteristics; impact factor; correlation analysis; Hexi Corridor
- CLC:
- P445.4
- DOI:
- -
- Abstract:
- In order to study the evolutionary characteristics and influencing factors of sand-dust storm,the methods of probability statistics,linear tendency rate and sliding t test were used,the spatial and temporal evolution characteristics of sandstorm in Hexi Corrido and its changing regularity were analyzed in detail based on the daily sandstorm data from 13 weather stations from 1960 to 2019 and the atmospheric circulation characteristics provided by the National Climate Center,and the climatic influencing factors of sandstorms were explored by correlation coefficient method. The results showed that the sandstorm had a significant decreasing trend,the interannual trend rate was 3.2 d/decade,and the decreasing trend was mutational,the reduction gradient of sandstorm decrease in the order: spring>summer>winter>autumn. The spatial evolution characteristics was that occurrence frequency of sandstorm was positively correlated with the decreasing level,which was the highest in Minqin and the lowest in Mazong Mountain. The average duration of sandstorm was 119 minutes,the duration frequency of 60～300 minutes was the most,the duration frequency of>300 minutes was the least. The duration showed a significant shortening trend,the interannual trend rate was -7.42 m/decade,the most obvious shortening had been observed in the last 9 years. The average minimum visibility of sandstorm was 0.569 km,the average frequency of general sandstorm with the minimum visibility of 0.5～1.0 km was the most,and the frequency of <0.05 km super-strong sandstorm was the least,the intensity of sandstorm had no obvious change in recent 16 years. The frequency and duration of sandstorms were positively correlated with the Western Pacific Sub Tropical High Western Ridge Point Index,and negatively correlated with the Western Pacific Subtropical High Area and Intensity Index,East Asian Trough Intensity Index,Tibet Plateau Region -1 and -2 Index,Atlantic multi-decadal Oscillation Index. The atmospheric circulation index is one of the important factors that affect the occurrence and development of sand-dust storms.
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Last Update:
2021-08-20