DOI: 10.1016/j.atmosenv.2014.01.031
Scopus记录号: 2-s2.0-84897648542
论文题名: On the processes influencing the vertical distribution of ozone over the central Himalayas: Analysis of yearlong ozonesonde observations
作者: Ojha N ; , Naja M ; , Sarangi T ; , Kumar R ; , Bhardwaj P ; , Lal S ; , Venkataramani S ; , Sagar R ; , Kumar A ; , Chandola H ; C
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2014
卷: 88 起始页码: 201
结束页码: 211
语种: 英语
英文关键词: Biomass-burning
; Central Himalayas
; Indo-Gangetic Plain
; Ozonesonde
; Regional pollution
; Stratospheric intrusion
Scopus关键词: Biomass-burning
; Himalayas
; Indo-Gangetic Plains
; Ozone sondes
; Regional pollution
; Stratospheric intrusion
; Atmospheric thermodynamics
; Biomass
; Meteorological instruments
; Ozone
; Troposphere
; Air pollution
; iodide ion
; ozone
; anthropogenic effect
; ground-based measurement
; ozone
; parameterization
; pollution monitoring
; seasonal variation
; troposphere
; vertical distribution
; article
; burn
; India
; meteorology
; photochemistry
; priority journal
; seasonal variation
; spring
; troposphere
; velocity
; wind
; winter
; Himalayas
; India
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: First yearlong (2011) balloon-borne measurements of ozone vertical distribution (EN-SCI 2ZV7 ECC Ozonesonde) and meteorological parameters (iMet-1-RSB 403MHz GPS Radiosonde) over Nainital (79.5°E, 29.4°N, 1958mamsl) in the central Himalayas are presented. Lower tropospheric ozone shows a prominent seasonality with highest levels during spring (~70-110ppbv in May) and lowest levels during summer-monsoon (~20-50ppbv), which is consistent with the ground-based observations. The lower tropospheric ozone minimum coincides with highest values of relative humidity (80-100%) during the summer-monsoon. However, ozone mixing ratios in the middle-upper troposphere show less pronounced and different seasonality. Influences of subtropical jets are observed (wind speed: ~40-80ms-1) in the middle-upper troposphere, particularly during winter. A stratospheric intrusion event during winter is observed, which enhances the ozone levels by ~180% in the middle-upper troposphere. A noticeable feature of secondary ozone peaks (~140-250ppbv) is observed in the middle troposphere (~8-12km), more frequently during spring. Ozone levels in 2-4km altitude range are higher by 19.9±4.6ppbv during the springtime high fire activity period over the northern India. Moreover, the lower tropospheric ozone levels over Nainital during spring are found to be considerably (~30ppbv) higher than those over Ahmedabad in the western India. This ozone enhancement is attributed mainly to the regional pollution of the Indo-Gangetic Plain (IGP) supplemented with the northern Indian biomass burning. It is suggested that regional photochemistry and biomass burning processes play controlling role in the lower troposphere, while, the middle-upper tropospheric variations are driven by dynamical processes including advection and stratospheric intrusion. © 2014 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/80685
Appears in Collections: 气候变化事实与影响
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作者单位: Aryabhatta Research Institute of Observational Sciences (ARIES), Nainital, India; Department of Physics, Kumaun University, Nainital, India; Atmospheric Chemistry Division, National Center for Atmospheric Research (NCAR), Boulder, United States; Physical Research Laboratory (PRL), Ahmedabad, India
Recommended Citation:
Ojha N,, Naja M,, Sarangi T,et al. On the processes influencing the vertical distribution of ozone over the central Himalayas: Analysis of yearlong ozonesonde observations[J]. Atmospheric Environment,2014-01-01,88