摘要
使用中国东部及其邻近地区各主要台站１９９２年全年００点和１２点（ＧＭＴ）地面及探空资料，由中尺度气象预报模式ＭＭ４产生中国东部地区地面以上大约４０ｍ高度（最低模式层）处二维温度、湿度和风场，使用污染物干沉降模块及该地区下垫面类型资料，计算出了该地区ＳＯ２，ＳＯ＝４和ＨＮＯ３（ｇ）全年干沉降速度的区域分布和季节变化。结果表明，由于受气象条件和下垫面类型的综合影响，３种污染物的干沉降速度有明显的变化。对ＳＯ２，全年区域平均极小值为０．０８８ｃｍ／ｓ，极大值为１．２７５ｃｍ／ｓ，平均值为０．４３０ｃｍ／ｓ；对ＳＯ＝４，分别为０．０１４ｃｍ／ｓ，０．２８７ｃｍ／ｓ和０．１１８ｃｍ／ｓ；对ＨＮＯ３（ｇ），分别为０．０６０ｃｍ／ｓ，５．２５０ｃｍ／ｓ和１．１２３ｃｍ／ｓ。ＳＯ２干沉降速度极大值分布在巴丹吉林沙漠和腾格里沙漠一带，对ＳＯ＝４和ＨＮＯ３（ｇ），除在上述沙漠地带有一极大值区域外，在靠近四川的云贵高原尚有另一极大区。对１９９２年全年来说，ＳＯ２和ＨＮＯ３（ｇ）干沉降速度极大值均出现在七月份，分别为０．５５２ｃｍ／ｓ和１．５１８ｃｍ／ｓ；而对ＳＯ＝４，干沉降速度极大值出现在九月份，其值为０．０９６ｃｍ／ｓ。这些值?
SO 2,SO = 4 and HNO 3(g) dry deposition velocities and their seasonal variations at a height of approximately 40m above sruface over eastern China were calculated using MM4 mesescale meteorological model by combining detailed landuse data with meteorological information throughout 1992. It was found that spatial and time variations of SO 2,SO = 4 and HNO 3(g) dry deposition velocities are very notable because of the combining influences of meteorological conditions and landuse. SO 2,SO = 4 and HNO 3(g) domain averaged dry deposition velocities vary among 0 088-1 275cm/s, 0.014-0 287cm/s and 0 060-5 250cm/s, respectively, the averaged values are 0.430cm/s,0.118cm/s and 1.123cm/s, respectively. There was a maximun value region of domain averaged SO 2 deposition velocity in Badain Jarain Desert and Tengger Desert, but for SO = 4 and HNO 3(g),there was also an other maximum value region in northern part of Yun Gui Plateau except above mentioned areas. For one year period, SO 2 and HNO 3(g) maximum domain averaged dry deposition velocities appeared in July 1992,which was 0.552cm/s and 1.518cm/s, respectively, but for SO = 4, that appeared in September, and was 0.096cm/s. These values were all in the field measurement scope.
出处
《气象学报》
CSCD
北大核心
1997年第5期545-562,共18页
Acta Meteorologica Sinica
基金
国家85科技攻关85-912-01-04
