DOI: 10.1002/jgrd.50348
论文题名: Ozone variations over the northern subtropical region revealed by ozonesonde observations in Hanoi
作者: Ogino S.-Y. ; Fujiwara M. ; Shiotani M. ; Hasebe F. ; Matsumoto J. ; Hoang T.H.T. ; Nguyen T.T.T.
刊名: Journal of Geophysical Research Atmospheres
ISSN: 21698996
出版年: 2013
卷: 118, 期: 8 起始页码: 3245
结束页码: 3257
语种: 英语
英文关键词: Asian monsoon
; Indochina Peninsula
; Ozone
; Ozonesonde
; Rossby wave breaking
; Stratosphere-troposphere exchange
Scopus关键词: Meteorological instruments
; Ocean currents
; Ozone
; Statistics
; Asian monsoon
; Indochina Peninsula
; Ozone sondes
; Rossby wave
; Stratosphere-troposphere exchange
; Troposphere
; air mass
; anticyclone
; atmospheric pollution
; biomass burning
; mixing ratio
; ozone
; ozonesonde
; Rossby wave
; seasonal variation
; stratosphere-troposphere interaction
; subtropical region
; Hanoi
; Indochina
; Viet Nam
英文摘要: Seasonal and subseasonal variations in the ozone mixing ratio (OMR) are investigated by using continuous 7 year ozonesonde data from Hanoi (21°N, 106°E), Vietnam. The mean seasonal variations for the 7 years show large amplitude at the upper troposphere and lower stratosphere (UTLS) region (10-18 km) and at the lower troposphere (around 3 km) with standard deviations normalized by the annual mean value of about 30% for both regions. In the UTLS region, the seasonal variation in the OMR shows a minimum in winter and a maximum in spring to summer. The variation seems to be caused by the seasonal change in horizontal transport. Low OMR air masses are transported from the equatorial troposphere in winter by the anticyclonic flow associated with the equatorial convections, and high OMR air masses are transported from the midlatitude stratosphere in summer possibly due to Rossby wave breakings in the UT region and anticyclonic circulation associated with the Tibetan High in the LS region. In the lower troposphere, a spring maximum is found at 3 km height. Biomass burning and tropopause foldings are suggested as possible causes of this maximum. Subseasonal variations in the OMR show large amplitude in the UTLS region (at around 15 km) and in the boundary layer (below 1 km) with the standard deviations normalized by the annual mean larger than 40%. The OMR variations in the winter UTLS region have a negative correlation with the meridional wind. This relation indicates that the low OMRs observed at Hanoi has been transported from the equatorial region. ©2013. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/63799
Appears in Collections: 影响、适应和脆弱性 气候减缓与适应
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作者单位: Research Institute for Global Change (RIGC), Japan Agency for Marine-Earth Science and Technology (JAMSTEC), 2-15, Natsushima-cho, Yokosuka 237-0061, Japan; Graduate School of Science, Kobe University, Kobe, Japan; Faculty of Environmental Earth Science, Hokkaido University, Sapporo, Japan; Research Institute for Sustainable Humanosphere, Kyoto University Kyoto, Uji, Japan; Department of Geography, Tokyo Metropolitan University, Hachioji, Japan; Aero-Meteorological Observatory, National Hydrometeorological Service, Ministry of Natural Resources and Environment, Hanoi, Viet Nam
Recommended Citation:
Ogino S.-Y.,Fujiwara M.,Shiotani M.,et al. Ozone variations over the northern subtropical region revealed by ozonesonde observations in Hanoi[J]. Journal of Geophysical Research Atmospheres,2013-01-01,118(8)