| Analysis on the decadal scale variation of the dust storm in North China |
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| 作者姓名： | KANG Dujuan & WANG Huijun . NZC/LASG Institute of Atmospheric Physics Chinese Academy of Sciences Beijing China . Environmental Fluid Mechanics Laboratory Stanford University Stanford CA USA |
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| 作者单位： | KANG Dujuan1，2 & WANG Huijun1 1. NZC/LASG，Institute of Atmospheric Physics，Chinese Academy of Sciences，Beijing 100871，China; 2. Environmental Fluid Mechanics Laboratory，Stanford University，Stanford CA 94305，USA |
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| 基金项目： | 国家自然科学基金，中国科学院资助项目 |
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| 摘 要： | Dust storm is a disastrous weather that can cause serious environmental consequences and hazards. It causes excessive soil mass and nutrient loss in source areas, and air pollution in deposition area, which result in bad influence on agriculture, industry, traffic, and peoples’ daily life1-4]. Dust storm can also affect the thermal balance of planetary radiation and then lead to meso- to macroscale climatic modification5-7]. North- west China and North China are two high-frequency centers …
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| 收稿时间： | 14 October 2008 |
Analysis on the decadal scale variation of the dust storm in North China |
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| KANG Dujuan, & WANG Huijun . NZC/LASG,Institute of Atmospheric Physics,Chinese Academy of Sciences,Beijing ,China, . Environmental Fluid Mechanics Laboratory,Stanford University,Stanford CA ,USA.Analysis on the decadal scale variation of the dust storm in North China[J].Science in China(Earth Sciences),2005,48(12):2260-2266. |
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| Authors: | Email author" target="_blank">Dujuan?KangEmail author Huijun?Wang |
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| Institution: | 1. NZC/LASG, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100871, China;Environmental Fluid Mechanics Laboratory, Stanford University, Stanford CA 94305, USA
2. NZC/LASG, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100871, China |
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| Abstract: | In this paper, the temporal variation characteristics of the dust storm in North China are investigated. Based on power spectrum
analysis and wavelet analysis, 1956-1970 and 1985-1999 are chosen as the high-frequency and low-frequency dust storm decades
respectively. Analysis results clearly show that the spring and wintertime anomalous atmospheric circulation between these
two decades are significantly different. Compared with the former decade, there are a strengthened polar vortex, enhanced
westerlies near 50°N, and a weak East Asian major though in the winter of the latter decade. The north and center parts of
the Siberian high and the Aleutian low become weak. The southerly and easterly wind anomalies appear over the north and east
parts of China, which implies the weakening of East Asian winter monsoon. Meanwhile, northern China experiences warmer winters
and wetter springs, which are in favor of the weakening of dust storm intensity in North China. There are significant out-of-phase
relationships between dust frequency and wintertime westerly intensity, as well as between dust frequency and Arctic Oscillation.
It is also found that the frequency of dust weather is strongly related to winter-springtime East Asian monsoon intensity. |
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| Keywords: | dust storm climate anomaly decadal scale variability East Asian monsoon AO |
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