中國西南地區(qū)氣溶膠光學厚度的時空特征

doi:10.3969/2012jms.00**

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中國西南地區(qū)氣溶膠光學厚度的時空特征
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                        10.3969/2012jms.00**
                    
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中圖分類號:P421
基金項目:中國氣象局新技術(shù)推廣項目（CMATG2008M51），國家自然科學基金資助項目（40865002），公益性行業(yè)（氣象）科研專項（GYHY（QX）200806026）

Characteristics of aerosol optical depth distributions over southwest China

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采用MODIS衛(wèi)星遙感產(chǎn)品研究西南地區(qū)氣溶膠季節(jié)變化，并對成都和香格里拉兩站2008年的太陽光度計觀測資料進行分析。結(jié)果表明西南地區(qū)氣溶膠光學厚度（AOD Aerosol Optical Depth）全年呈西低東高的地理分布特征，但東西部季節(jié)變化特征不同：西南地區(qū)東部AOD有春季最大，秋冬次之，夏季最小的演變特征，并且在四川盆地，黔、渝、湘交界和廣西中部有三個明顯的AOD高值區(qū)。西南地區(qū)西部AOD有春季最大，夏秋次之，冬季最小的演變特征，無明顯高值區(qū)。太陽光度計資料分析表明，成都地區(qū)AOD日變化呈準雙峰型，香格里拉AOD日變化呈上升趨勢。

Abstract:

The characteristics and seasonal changes of the aerosol optical depth（AOD）distribution of the southwest China were analyzed by using MODIS products and sun-photometer CE318 observations at Chengdu and Shangrila in 2008. The results showed the main geographical distribution feature of AOD from MODIS that was characterized by higher AOD in the west and lower in the east throughout the year. The seasonal variations are different between the eastern and western parts of southwest China. The AOD value in eastern part has shown the evolution features with the maximum in spring, next in autumn and winter, the minimum in summer. Three obviously high value areas of AOD were located at the Sichuan Basin, the juncture of Guizhou, Chongqing, Hunan provinces and the middle of Guangxi. The AOD in western part has shown the features with the maximum in spring, next in summer and autumn, the minimum in winter, and there were no significantly high value areas. From daily sun photometer data analysis it has been found that the changes of AOD in Chengdu from sunrise to sunset were quasi-bimodal, but there were upward trend in Shangrila region.

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田永麗,張萬誠,陳新梅,和春榮.中國西南地區(qū)氣溶膠光學厚度的時空特征.氣象科學,2010,(6):785-790 Tian Yongli, Zhang Wancheng, Chen Xinmei, He Chunrong. Characteristics of aerosol optical depth distributions over southwest China. Journal of the Meteorological Sciences,2010,(6):785-790

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