TSP and O{sub 3} concentrations under the influences of internal gravity wave in the mountainous coastal regions

Conference · Tue Dec 31 04:00:00 EST 1996

OSTI ID:466113

Choi, Hyo ^[1]

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1. Kangnung National Univ., Kangwando (Korea, Republic of)

Under the synoptic scale strong westerly winds flowing over the large steep mountains in the eastern coastal region, the strong down slope wind storm such as internal gravity waves should be generated in the lee-side of mountain. In the daytime a sea breeze circulation induced by meso-scale thermal forcing from sea toward inland confines to the offshore side of coastal sites due to the eastward internal gravity waves. Evidently, two different kinds of atmospheric circulations such as an internal gravity wave circulation with westerly wind and a sea breeze circulation with both easterly wind near the sea surface and westerly in the upper level were apparently produced. Thus, surface winds near the coastal seas were relatively weaker than those in the open sea or the inland sites. Under this situation the atmospheric pollutants at Kangnung city should be trapped by two different circulations in the opposite directions and resulted in the high concentrations of Total Suspended Particles (TSP) and ozone (O{sub 3}). At night a meso-scale land breeze from the inland toward the coastal sea could be associated with the existed eastward down slope wind and induced the more intensification of westerly winds in the coastal regions. The concentrations of TSP controlled by the strong surface winds blowing from the mountain side toward the coastal sea were relatively higher at night than those in the daytime case and the concentrations of O{sub 3} due to the downward transport of Ozone from the upper atmosphere toward the surface were also much higher at night than during the day. Consequently, the atmospheric pollutant concentrations in the mountain coastal region under the strong down slope wind, that is, wind storms were higher than those after and before the occurrences of wind storms.

• OSTI ID: 466113
• Report Number(s): CONF-9606185--
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
AIR POLLUTION
COASTAL REGIONS
ECOLOGICAL CONCENTRATION
GRAVITY WAVES
MOUNTAINS
OZONE
REPUBLIC OF KOREA
RESPONSE MODIFYING FACTORS
TOTAL SUSPENDED PARTICULATES