两种方法计算河北不同地形混合层高度及其与细颗粒物的相关性研究  

Study on the Correlations between Atmospheric Mixing Layer Height and Fine Particulate Matters by Two Methods in Hebei

作　　者：庞杨 朱锐 熊险平 李二杰 PANG Yang;ZHU Rui;XIONG Xian-ping;LI Er-jie(Cangzhou Meteorological Bureau,Cangzhou Hebei 061000,China;不详)

机构地区：[1]沧州市气象局,河北沧州061000 [2]河北省气象局,河北石家庄050000

出　　处：《环境科学导刊》2022年第5期49-53,共5页Environmental Science Survey

摘　　要：采用2017—2019年河北沿山、平原、沿海地区5个国家基本(准)站的观测数据,分别利用国标法、罗氏法对河北不同地形下各区域的混合层高度进行计算分析,结果表明:各地日变化均呈单峰型变化特征,其中罗氏法的计算高度在时间变化规律上更接近现实。国标法计算的混合层高度主要与10 m风速相关;罗氏法计算的混合层高度不但与10 m风速相关,同样与湿度有80%以上的负相关性。东部沿海地区混合层高度高于西部沿山地区,西部沿山地区混合层高度高于南部平原地区。罗氏法计算得到的混合层高度频率分布较国标法更均匀,分布区域也更大。罗氏法计算混合层高度与细颗粒物PM_(2.5)浓度相关性更大,由混合层高度与PM_(2.5)浓度拟合的PM_(2.5)浓度计算公式更适用于河北平原地区,沿海、山区并不适用。The observation data of five national basic(quasi) stations in Hebei from 2017 to 2019 were used.Both national standard method and NOZAKI method were used to calculate and analyze the height of mixed layers.The results showed that the mixing layer height was the lowest in the mountainous area.It was higher in the coastal area,and the highest was found in the southern plain area.Compared with the national standard method,the height and frequency distribution of the mixed layer calculated by NOZAKI method was more uniform and the distribution area was larger.The height of mixing layer calculated by the national standard method was mainly related to the wind speed of 10 meters.The height of mixing layer calculated by NOZAKI method was not only related to wind speed,but also has a negative correlation with humidity of over 80%.The daily variation of each region was of single peak type,and the calculated height by NOZAKI method was closer to the reality in terms of time variation rule.The distribution frequency of the height by NOZAKI method seemed more even with wider area.There was a higher correlation between the height and the PM_(2.5) concentration.The formula of PM_(2.5) concentration calculation fitted from the mixing layer height and PM_(2.5) concentration was more suitable in the plain area,rather than the costal and mountainous area.

关 键 词：大气混合层高度 国标法 罗氏法 细颗粒物浓度 河北 

分 类 号：X51[环境科学与工程—环境工程]