| DOI: | 10.1016/j.atmosenv.2014.10.019
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| Scopus记录号: | 2-s2.0-84910095532
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| 论文题名: | Carbon monoxide over Indian region as observed by MOPITT |
| 作者: | Girach I; A; , Nair P; R
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| 刊名: | Atmospheric Environment
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| ISSN: | 0168-2563
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| EISSN: | 1573-515X
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| 出版年: | 2014
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| 卷: | 99 | | 起始页码: | 599
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| 结束页码: | 609
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| 语种: | 英语
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| 英文关键词: | Biomass burning
; Carbon monoxide
; Long-term trend
; Seasonal variation
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| Scopus关键词: | Biomass-burning
; Long-term trend
; Seasonal variation
; Carbon monoxide
; carbon monoxide
; atmospheric convection
; atmospheric pollution
; biomass burning
; carbon monoxide
; MOPITT
; regional climate
; seasonal variation
; troposphere
; air pollution
; altitude
; Article
; biomass
; geographic distribution
; India
; measurement of pollution in the troposphere
; oceanic regions
; pollution monitoring
; seasonal variation
; summer
; thermodynamics
; trend study
; troposphere
; water vapor
; winter
; India
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| Scopus学科分类: | Environmental Science: Water Science and Technology
; Earth and Planetary Sciences: Earth-Surface Processes
; Environmental Science: Environmental Chemistry
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| 英文摘要: | A comprehensive study has been carried out on tropospheric carbon monoxide (CO) over the Indian land mass and surrounding oceanic region using the CO retrievals from MOPITT (Measurements of Pollution in the Troposphere) for a period of ~14 years (2000-2014). The lower-tropospheric CO maximises during winter and shows a broad minimum during summer-monsoon over most of the regions, but with regionally varying seasonal amplitudes. Tropospheric column CO also exhibits a seasonal pattern similar to lower-tropospheric CO. But the upper-tropospheric CO shows an opposite seasonal pattern which peaks during summer monsoon. Columnar CO showed strong positive correlation with fire counts over west, east and north-east India, indicating the dominant role of biomass burning in controlling the seasonal variation of CO. The lower-tropospheric and columnar CO showed decreasing trend of 2.0-3.4ppbyear-1 (1.1-2.0%year-1) and 6.0-13.6×1015moleculescm-2year-1 (0.3-0.6%year-1) respectively over most of the regions. However, over many land regions trend in columnar CO is not significant. Most strikingly, the upper tropospheric CO showed increasing trend of 1.4-2.4ppbyear-1 (1.8-3.2%year-1). The analysis of biases in the estimated trends due to temporal changes in the MOPITT averaging kernels shows that magnitude of the realistic trend may change depending upon the bias but the sign (positive or negative) of trend remains the same. The decreasing trend in lower tropospheric and columnar CO could be attributed partly to increase in lower tropospheric water vapour and/or tropospheric ozone. The strengthening of convective activity, uplifting the CO to higher altitudes, could be a reason for increasing trend in the upper-tropospheric CO. © 2014 Elsevier Ltd. |
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/80569
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| Appears in Collections: | 气候变化事实与影响
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作者单位: | Space Physics Laboratory, Vikram Sarabhai Space Centre, ISRO, Thiruvananthapuram, India
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| Recommended Citation: | |
Girach I,A,, Nair P,et al. Carbon monoxide over Indian region as observed by MOPITT[J]. Atmospheric Environment,2014-01-01,99
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