TY - JOUR
T1 - A study of the atmospheric boundary layer using radon and air pollutants as tracers
AU - Kataoka, Toshio
AU - Yunoki, Eiji
AU - Shimizu, Mitsuo
AU - Mori, Tadashige
AU - Tsukamoto, Osamu
AU - Ohashi, Yukitaka
AU - Sahashi, Ken
AU - Maitani, Toshihiko
AU - Miyashita, Koh’ichi
AU - Iwata, Toru
AU - Fujikawa, Yoko
AU - Kudo, Akira
AU - Shaw, Roger H.
PY - 2001/1/1
Y1 - 2001/1/1
N2 - Concentrations of radon 222Rn and air pollutants, meteorological parameters near the surface and vertical profiles of meteorological elements were measured at Uchio (Okayama City, Okayama Prefecture, Japan) 12 km north from the coast of the Inland Sea of Japan. In the nighttime, the 222Rn concentration increased in the case of weak winds, but did not increase as much in the case of moderate or strong winds, as had been expected. In the daytime, the 222Rn concentration held at a slightly higher than average level for the period from sunrise to about 1 100 JST. It is considered that this phenomenon is due to a period of morning calm, that is, a transition period from land breeze to sea breeze. NO, which is sensitive to traffic volume, brought information concerning advection. Oxidant concentrations, which reflect the availability of sunlight, acted in the reverse manner to 222Rn concentrations. Thus, a set of 222Rn and air pollutants could provide useful information regarding the local conditions of the atmospheric boundary layer.
AB - Concentrations of radon 222Rn and air pollutants, meteorological parameters near the surface and vertical profiles of meteorological elements were measured at Uchio (Okayama City, Okayama Prefecture, Japan) 12 km north from the coast of the Inland Sea of Japan. In the nighttime, the 222Rn concentration increased in the case of weak winds, but did not increase as much in the case of moderate or strong winds, as had been expected. In the daytime, the 222Rn concentration held at a slightly higher than average level for the period from sunrise to about 1 100 JST. It is considered that this phenomenon is due to a period of morning calm, that is, a transition period from land breeze to sea breeze. NO, which is sensitive to traffic volume, brought information concerning advection. Oxidant concentrations, which reflect the availability of sunlight, acted in the reverse manner to 222Rn concentrations. Thus, a set of 222Rn and air pollutants could provide useful information regarding the local conditions of the atmospheric boundary layer.
KW - Concentration of air pollutants
KW - Inversion layer
KW - Land and sea breezes
KW - Mixing layer
KW - Morning and evening calms
KW - Rn concentration
UR - http://www.scopus.com/inward/record.url?scp=17944376343&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=17944376343&partnerID=8YFLogxK
U2 - 10.1023/A:1019219708361
DO - 10.1023/A:1019219708361
M3 - Article
AN - SCOPUS:17944376343
SN - 0006-8314
VL - 101
SP - 131
EP - 155
JO - Boundary-Layer Meteorology
JF - Boundary-Layer Meteorology
IS - 2
M1 - 350414
ER -