四川温江黑碳气溶胶浓度观测研究  

Observational study of black carbon at Wenjiang, Sichuan Province

作　　者：秦世广[1] 汤洁[2,3] 石广玉[1] 温玉璞[2,3] 

机构地区：[1]中国科学院大气物理研究所 [2]中国气象科学研究院中国气象局大气成分观测与服务中心 [3]中国气象科学研究院中国气象局大气化学重点开放实验室,北京100081

出　　处：《环境科学学报》2007年第8期1370-1376,共7页Acta Scientiae Circumstantiae

基　　金：国家自然科学基金(No.49775274);国家公益性研究专项(No.2001DID10009)~~

摘　　要：结合常规气象资料,对1999年9月至2000年8月在四川温江获得的黑碳气溶胶观测资料进行分析.结果表明,该地黑碳气溶胶浓度变化十分剧烈,日平均浓度在1200～20000 ng·m-3之间.其浓度日变化具有明显的双峰特征;季节变化表现为冬季1月最大,中值接近8000ng·m-3,5月也存在一个浓度高值.黑碳浓度及其变化特征与该地盆地性气候、降水湿清除和局地人为活动的影响有很大关系,由小时平均浓度最大出现频数统计分析得出该地区大气黑碳气溶胶本底浓度约为2850 ng·m-3.Observations of black carbon were made using an aethalometer from September 1999 to August 2000 at Wenjiang, Sichuan province. Black carbon concentrations at Wenjiang varied acutely over a range of 1200 - 20000 ng·m^- 3 in daily mean concentration. The hourly mean of the black carbon concentration showed a diurnal variation characterized by a pronounced double-peak pattern with highs in the morning and evening. The concentration of black carbon was highest in January of winter, with a monthly median close to 8000 ng·m^- 3 and second highest in May. The possible influences of local circulation and local anthropogenic activity on diurnal and seasonal variation are discussed in combination with local meteorological data. Based on lognormal statistics, the background concentration of black carbon in this area was estimated to be approximately 2850 ng·m^- 3.

关 键 词：黑碳 气溶胶 观测 四川盆地 

分 类 号：X513[环境科学与工程—环境工程]