DOI: 10.1016/j.atmosenv.2015.04.028
Scopus记录号: 2-s2.0-84929485753
论文题名: Analysis of 20 years of tropospheric ozone vertical profiles by lidar and ECC at Observatoire de Haute Provence (OHP) at 44°N, 6.7°E
作者: Gaudel A ; , Ancellet G ; , Godin-Beekmann S
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2015
卷: 113 起始页码: 78
结束页码: 89
语种: 英语
英文关键词: Data analysis
; Lidar
; Ozone
; Ozonesonde
; Transport
; Trend
Scopus关键词: Atmospheric pressure
; Data reduction
; Meteorological instruments
; Mixing
; Observatories
; Optical radar
; Ozone
; Surface measurement
; Troposphere
; Differential absorption lidars
; Electrochemical concentration
; North Atlantic oscillations
; Ozone sondes
; Stratosphere-troposphere exchange
; Transport
; Trend
; Western Mediterranean basin
; Ozone layer
; ozone
; air mass
; data interpretation
; electrochemistry
; lidar
; mixed layer
; North Atlantic Oscillation
; ozone
; ozonesonde
; stratosphere
; trend analysis
; troposphere
; vertical profile
; altitude
; Article
; climate
; geographic origin
; mass
; meteorology
; North Atlantic oscillation
; priority journal
; sea level
; seasonal variation
; spring
; summer
; surface property
; troposphere
; Mediterranean Sea
; Mediterranean Sea (West)
; North America
; Western Europe
Scopus学科分类: Environmental Science: Water Science and Technology
; Earth and Planetary Sciences: Earth-Surface Processes
; Environmental Science: Environmental Chemistry
英文摘要: ECC (Electrochemical Concentration Cell) ozonesondes and UV DIAL (DIfferential Absorption Lidar) lidar measurements have been carried out simultaneously at OHP (Observatoire de Haute Provence, 44°N, 6.7°E, 690m) since 1991 and provide: (i) a good basis for long-term trend assessment by two different instruments at the same location and (ii) a 20-year climatology of tropospheric ozone in the Western Mediterranean basin. Air mass trajectories and mixing layer height (MLH) have been calculated for all the ozone observations available at OHP. The bias between the seasonal mean calculated with lidar and ECC ozone vertical profiles for 4 time-periods of 5 years is ~0.6. ppbv in the free troposphere (4-8km). Larger differences (≥10. ppbv) are explained by the need for clear sky conditions during lidar observations. Measurements of both instruments have been combined to decrease the impact of short-term atmospheric variability on the trend estimate. In the upper and the mid-troposphere, the spring maximum decreases by 5ppbv during the 20-year period. In the mid-troposphere, the summer average decreases by 3ppbv during the 20-year period. At altitude above 4km, the variability of ozone attributed to different source regions can be in the range of 5-10ppbv over 20 years and is mitigated by transport variability. In the lower troposphere and after year 2000, there is a sharp 5ppbv decrease of the spring and summer averages of the surface measurements and of the ECC observations made in the 0.6-4km altitude range. There is also a decrease of the lowermost troposphere ozone vertical gradient which is explained by the variability of the MLH (mixing layer height). The trends of ozone annual mean show significant decrease of 3 and 4ppbv/decade from 1998 to 2010at the surface and at the 2-4km altitude range, while no significant trends are observed at higher altitude. Positive North Atlantic Oscillation (NAO) periods correspond to positive yearly mean ozone anomalies in the upper troposphere in relation with stratosphere-troposphere exchange. A negative NAO period in 2010 corresponds to an increase of the yearly mean ozone anomaly in the lower troposphere due to a more suitable transport of ozone precursors from Northern America and Western Europe. © 2015 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/81726
Appears in Collections: 气候变化事实与影响
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作者单位: Sorbonne Université, UPMC, Université Versailles St-Quentin, CNRS/INSU, LATMOS, Paris, France
Recommended Citation:
Gaudel A,, Ancellet G,, Godin-Beekmann S. Analysis of 20 years of tropospheric ozone vertical profiles by lidar and ECC at Observatoire de Haute Provence (OHP) at 44°N, 6.7°E[J]. Atmospheric Environment,2015-01-01,113