By using the meteorological data in the pollution boundary layer which was observed in two ground observation sites:coast and land in the river outlet area of Grand Liao River during January-February in 2007,the daily...By using the meteorological data in the pollution boundary layer which was observed in two ground observation sites:coast and land in the river outlet area of Grand Liao River during January-February in 2007,the daily change characteristics of pollute boundary layer in winter in the area were discussed. The results showed that the pollute boundary layer in the river outlet area of Grand Liao River was affected by the sea and land. In the certain weather condition,maybe the sea-land breeze appeared in the low altitude which was below 200 m in the coastal zone. The stability change in the different height in the coastal zone was more stable than in the land zone,and the wind field change in the area was mainly in 300 m low altitude. At night,the temperature inversion often appears in the area,and the thickness of temperature inversion layer is stably during 200-300 m. The thermal internal boundary layer penetrated deeply into the land about 10 km,and the height could reach 800 m. The atmospheric diffusion ability in the coastal area was weaker and stronger in the land area.展开更多
利用2006年Global emissions data和2011年NCEP Final Analysis资料作为WRF-chem3．0模式的初、边值条件，模拟了2011年4月25日-5月25日南海夏季风爆发前后一个月，区域为70～160°E，0～40°N范围内的季风区海盐、PM10、COx、...利用2006年Global emissions data和2011年NCEP Final Analysis资料作为WRF-chem3．0模式的初、边值条件，模拟了2011年4月25日-5月25日南海夏季风爆发前后一个月，区域为70～160°E，0～40°N范围内的季风区海盐、PM10、COx、SO2、NOx及O3等各种大气化学污染物的三维空间基本分布情况，结果发现在近地面950hPa和400hPa高度附近，由季风爆发引起的南海地区偏西和偏南风分量加强等风场形势的改变，导致了相应各种污染物浓度在分布上的较大变化，尤其在南海地区，由于出现较强风场辐合导致该地区的污染物浓度明显高于其它区域。还发现在垂直方向上，各种污染物的分布都分别受到了由季风爆发期间引起的偏西和偏南风分量变化的影响较明显。同时，季风爆发前陆地上的污染物浓度明显大于海洋上的污染物浓度，而随着季风爆发，大部分污染物的这种海陆浓度差异会大幅减小。展开更多
基金Supported by The Special Project of Public Welfare Industry(Meteorology)of Science and Technology Ministry(GYHY200806020)The National Natural Science Fund(40975084)The Science Research Fund of Liaoning Meteorological Bureau(2008008)
文摘By using the meteorological data in the pollution boundary layer which was observed in two ground observation sites:coast and land in the river outlet area of Grand Liao River during January-February in 2007,the daily change characteristics of pollute boundary layer in winter in the area were discussed. The results showed that the pollute boundary layer in the river outlet area of Grand Liao River was affected by the sea and land. In the certain weather condition,maybe the sea-land breeze appeared in the low altitude which was below 200 m in the coastal zone. The stability change in the different height in the coastal zone was more stable than in the land zone,and the wind field change in the area was mainly in 300 m low altitude. At night,the temperature inversion often appears in the area,and the thickness of temperature inversion layer is stably during 200-300 m. The thermal internal boundary layer penetrated deeply into the land about 10 km,and the height could reach 800 m. The atmospheric diffusion ability in the coastal area was weaker and stronger in the land area.
文摘利用2006年Global emissions data和2011年NCEP Final Analysis资料作为WRF-chem3．0模式的初、边值条件，模拟了2011年4月25日-5月25日南海夏季风爆发前后一个月，区域为70～160°E，0～40°N范围内的季风区海盐、PM10、COx、SO2、NOx及O3等各种大气化学污染物的三维空间基本分布情况，结果发现在近地面950hPa和400hPa高度附近，由季风爆发引起的南海地区偏西和偏南风分量加强等风场形势的改变，导致了相应各种污染物浓度在分布上的较大变化，尤其在南海地区，由于出现较强风场辐合导致该地区的污染物浓度明显高于其它区域。还发现在垂直方向上，各种污染物的分布都分别受到了由季风爆发期间引起的偏西和偏南风分量变化的影响较明显。同时，季风爆发前陆地上的污染物浓度明显大于海洋上的污染物浓度，而随着季风爆发，大部分污染物的这种海陆浓度差异会大幅减小。
