摘要
用Bigg型混合云室对 2 0 0 1年 8月黄河上游青海省河南县的地面大气冰核浓度进行了观测 ,分析发现 :(1 )青海省河南县冰核浓度低于北京 2 0世纪 90年代的测值 ,但高于大连、西安和兰州 (2 0世纪 60年代 )等地的测值 ,同时也高于黄河上游的玛曲 (2 0 0 0年 )、西宁(1 989年 )两地的测值 ,高温核尤其偏高。 (2 )降水时大气冰核浓度减少 ,降水的冲刷可能是其主要原因。 (3)当地冰核浓度和气压成正相关。 (4)大气冰核浓度受风向的影响 ,无风时测值较小 ,偏东风时测值较大 ,高温核浓度增加明显。
The content of ice nuclei in the atmosphere in Henan County of Qinghai Province was observed with a mixing chamber in August 2002. The main analysis results are as follows: (1) The average number of ice nuclei in Henan, Qinghai is lower than the observed results of Beijing in the 1990s, but higher than that of Dalian, Xi'an and Lanzhou in the 1960s. They are also higher than the results of Maqu in 2000 and Xining in 1989 in the same area, especially the nuclei activated at warmer temperature. (2) The number of ice nuclei can be reduced by rains. (3) The number of ice nuclei is generally in positive correlation with atmosphere pressure. (4) The number of ice nuclei is also affected by wind direction, greater in east winds and less in calm.
出处
《应用气象学报》
CSCD
北大核心
2003年第b03期41-48,共8页
Journal of Applied Meteorological Science
基金
国家重点科技攻关项目 ( 96 90 8 0 7)
( 2 0 0 1BA6 10 0 6 0 1)共同资助。
