TY - JOUR
T1 - Estimates of the contribution of below-cloud scavenging to the pollutant loadings of rain in Taipei, Taiwan
AU - Lin, Neng Huei
AU - Peng, Chi Ming
PY - 1999/12
Y1 - 1999/12
N2 - In this study, we use a simple and semi-quantitative scheme to estimate the contribution (denoted as f) of below-cloud scavenging of pollutants by raindrops, based on the precipitation chemistry collected in Taipei City and the cloud chemistry observed at the peak of the Mt. Bamboo (around 1100 m MSL) in the winters of 1996-1998. The magnitudes of f (nss (non-sea salt)-SO42-), f(NO3-) and f(NH4+) were estimated to range between 0.31-0.88, 0.25-0.88 and 0.54-96, respectively. For instance, 54-96% of the NH4+ ions in rainwater arose by below-cloud scavenging, reflecting their origins from local sources. For most of the cases, at least 75% of the NO3- was accounted for by the same scavenging mechanism, whereas more than 25% of nss-SO42- resulted from in-cloud scavenging. In comparison with NH4+ and NO3-, relatively higher amounts of nss-SO42- obviously derived from long-range transport.
AB - In this study, we use a simple and semi-quantitative scheme to estimate the contribution (denoted as f) of below-cloud scavenging of pollutants by raindrops, based on the precipitation chemistry collected in Taipei City and the cloud chemistry observed at the peak of the Mt. Bamboo (around 1100 m MSL) in the winters of 1996-1998. The magnitudes of f (nss (non-sea salt)-SO42-), f(NO3-) and f(NH4+) were estimated to range between 0.31-0.88, 0.25-0.88 and 0.54-96, respectively. For instance, 54-96% of the NH4+ ions in rainwater arose by below-cloud scavenging, reflecting their origins from local sources. For most of the cases, at least 75% of the NO3- was accounted for by the same scavenging mechanism, whereas more than 25% of nss-SO42- resulted from in-cloud scavenging. In comparison with NH4+ and NO3-, relatively higher amounts of nss-SO42- obviously derived from long-range transport.
KW - Below-cloud scavenging
KW - Cloud chemistry
KW - Precipitation chemistry
KW - Sulfate and nitrate
UR - http://www.scopus.com/inward/record.url?scp=0039257227&partnerID=8YFLogxK
U2 - 10.3319/TAO.1999.10.4.693(A)
DO - 10.3319/TAO.1999.10.4.693(A)
M3 - 期刊論文
AN - SCOPUS:0039257227
SN - 1017-0839
VL - 10
SP - 693
EP - 704
JO - Terrestrial, Atmospheric and Oceanic Sciences
JF - Terrestrial, Atmospheric and Oceanic Sciences
IS - 4
ER -