Samples of cloudwater, rainwater and ambient aerosol were collected over Maoer Mountain in the northeast of Guangxi Province in March 1988. The pH value of cloudwater ranged from 3.37 to 6.20 with a mean value of 4.34...Samples of cloudwater, rainwater and ambient aerosol were collected over Maoer Mountain in the northeast of Guangxi Province in March 1988. The pH value of cloudwater ranged from 3.37 to 6.20 with a mean value of 4.34. SO42- , NO3- , NH4+, Ca2+ and H+ were the principal ionic species of cloudwater. The advance of cold fronts into Maoer Mountain appeared to lead to higher major ionic concentration and acidity than that of warm fronts. The relative acidity and concentration of NO3- of cloudwater were much greater than that of aerosol samples. With the exception of. NO3- and H+, most of the concentration of SO42- and NH4+ in cloudwater came from the nucleation scavenging of aerosol. Gaseous nitric acid and organic acid from local may be one of the important source of cloudwater acidity. Compared with other sites, Maoer Mountain can be as a clean contrast station for studying acidic precipitation in Guangdong and Guangxi provinces.展开更多
Cloud chemistry is one of the important parts of environmental sciences and atmospheric chemistry. Measurement of cloudwater chemistry is receiving growing attention. This note is to present some results and discussio...Cloud chemistry is one of the important parts of environmental sciences and atmospheric chemistry. Measurement of cloudwater chemistry is receiving growing attention. This note is to present some results and discussion of measurement of the cloudwater chemistry in severe acid rain regions of China. Plane was used as sampling platform and two passive rod-slot cloudwater collectors made in our institute were used to collect cloudwater.The sampling method was introduced by Shen. The object clouds measured were mostly precipitus stratiform clouds, and the sample altitude was from 1 to 4 km above the sea level.展开更多
文摘Samples of cloudwater, rainwater and ambient aerosol were collected over Maoer Mountain in the northeast of Guangxi Province in March 1988. The pH value of cloudwater ranged from 3.37 to 6.20 with a mean value of 4.34. SO42- , NO3- , NH4+, Ca2+ and H+ were the principal ionic species of cloudwater. The advance of cold fronts into Maoer Mountain appeared to lead to higher major ionic concentration and acidity than that of warm fronts. The relative acidity and concentration of NO3- of cloudwater were much greater than that of aerosol samples. With the exception of. NO3- and H+, most of the concentration of SO42- and NH4+ in cloudwater came from the nucleation scavenging of aerosol. Gaseous nitric acid and organic acid from local may be one of the important source of cloudwater acidity. Compared with other sites, Maoer Mountain can be as a clean contrast station for studying acidic precipitation in Guangdong and Guangxi provinces.
基金Project supported by Program of National ScientificTechnical Strategy of the Seventh Five-Year Planthe Eighth Five-Year Plan.
文摘Cloud chemistry is one of the important parts of environmental sciences and atmospheric chemistry. Measurement of cloudwater chemistry is receiving growing attention. This note is to present some results and discussion of measurement of the cloudwater chemistry in severe acid rain regions of China. Plane was used as sampling platform and two passive rod-slot cloudwater collectors made in our institute were used to collect cloudwater.The sampling method was introduced by Shen. The object clouds measured were mostly precipitus stratiform clouds, and the sample altitude was from 1 to 4 km above the sea level.
