|
|
|||||||
|
当前位置：
首页»科研成果» 2014
杨新、李占清在 JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES发表论文
全球院
Increases in thunderstorm activity and relationships with air Xin Yang1,2 and Zhanqing Li1,2 1 College of Global Change and Earth System Sciences, Beijing Normal University, Beijing, China, 2 ESSIC and Department of Atmospheric and Oceanic Science, University of Maryland, College Park, Maryland, USA ABSTRACT This study analyzes 15 years of Tropical Rainfall Measuring Mission (TRMM) satellite data, together with surface observations of thunderstorms and visibility, to study trends and relationships between aerosols and thunderstorms in southeast China. TRMM data used are from the lightning imaging sensor (LIS) and the precipitation radar (PR). Surface data are human-observed thunderstorm occurrence and visibility for the period of 1990–2012 at 70 plain stations and 4 mountain stations. Thunderstorm and lightning activities, as well as PR echo top heights, have all increased significantly over the region during the period under study, while regional mean visibility has decreased greatly at the plain stations. The daily rainfall amount during thunderstorm days has increased significantly, but rainfall without thunderstorms has no trend during this period. In comparison, the four mountain weather stations at elevations greater than 1100 m showed little trend in the number of thunderstorm days during the period of 1990–2012. The ratio of the number of thunderstorm days between plain and mountain stations has increased significantly. The distinct trends seen between plain and mountain stations may originate from large differences in aerosol concentration between the plain and mountain regions. The accumulation of pollution aerosols in the plain region likely invigorates thunderstorms, whereas a lesser, or no, impact on intense convection is found over high-altitude regions. KEY WORDS: thunderstorm, pollution, aerosol, invigoration, China, TRMM PUBLISHED BY: JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 2014, 119 (4): 1835-1844 SOURCE: http://onlinelibrary.wiley.com/doi/10.1002/2013JD021224/abstract |
|||||||
| |||||||