Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.5194/acp-17-10143-2017 |
CCl4 distribution derived from MIPAS ESA v7 data: intercomparisons, trend, and lifetime estimation | |
Valeri, Massimo1,2; Barbara, Flavio3; Boone, Chris4; Ceccherini, Simone3; Gai, Marco3; Maucher, Guido6; Raspollini, Piera3; Ridolfi, Marco1,3; Sgheri, Luca5; Wetzel, Gerald6; Zoppetti, Nicola3 | |
2017-08-30 | |
发表期刊 | ATMOSPHERIC CHEMISTRY AND PHYSICS
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ISSN | 1680-7316 |
EISSN | 1680-7324 |
出版年 | 2017 |
卷号 | 17期号:16 |
文章类型 | Article |
语种 | 英语 |
国家 | Italy; Canada; Germany |
英文摘要 | Atmospheric emissions of carbon tetrachloride (CCl4) are regulated by the Montreal Protocol due to its role as a strong ozone-depleting substance. The molecule has been the subject of recent increased interest as a consequence of the so-called "mystery of CCl4", the discrepancy between atmospheric observations and reported production and consumption. Surface measurements of CCl4 atmospheric concentrations have declined at a rate almost 3 times lower than its lifetime-limited rate, suggesting persistent atmospheric emissions despite the ban. In this paper, we study CCl4 vertical and zonal distributions in the upper troposphere and lower stratosphere (including the photolytic loss region, 70-20 hPa), its trend, and its stratospheric lifetime using measurements from the Michelson Interferometer for Passive Atmospheric Sounding (MIPAS), which operated onboard the ENVISAT satellite from 2002 to 2012. Specifically, we use the MIPAS data product generated with Version 7 of the Level 2 algorithm operated by the European Space Agency. The CCl4 zonal means show features typical of long-lived species of anthropogenic origin that are destroyed primarily in the stratosphere, with larger quantities in the troposphere and a monotonic decrease with increasing altitude in the stratosphere. MIPAS CCl4 measurements have been compared with independent measurements from other satellite and balloon-borne remote sounders, showing a good agreement between the different datasets. CCl4 trends are calculated as a function of both latitude and altitude. Negative trends of about -10 to -15 pptv decade(-1) (10 to 30% decade(-1)) are found at all latitudes in the upper troposphere-lower stratosphere region, apart from a region in the southern midlatitudes between 50 and 10 hPa where the trend is positive with values around 5-10 pptv decade(-1) (15-20% decade(-1)). At the lowest altitudes sounded by MIPAS, we find trends consistent with those determined on the basis of long-term ground-based measurements (-10 to -13 pptv decade(-1)). For higher altitudes, the trend shows a pronounced asymmetry between the Northern and Southern hemispheres, and the magnitude of the decline rate increases with altitude. We use a simplified model assuming tracer-tracer linear correlations to determine CCl4 lifetime in the lower stratosphere. The calculation provides a global average lifetime of 47 (39-61) years, considering CFC-11 as the reference tracer. This value is consistent with the most recent literature result of 44 (36-58) years. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000408549100002 |
WOS关键词 | CARBON-TETRACHLORIDE CCL4 ; ALTITUDE-DEPENDENT REGULARIZATION ; CFC-12 CCL2F2 MEASUREMENTS ; MICHELSON INTERFEROMETER ; TECHNICAL NOTE ; MEAN AGE ; RETRIEVAL ; AIR ; APPROXIMATIONS ; CIRCULATION |
WOS类目 | Environmental Sciences ; Meteorology & Atmospheric Sciences |
WOS研究方向 | Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/30495 |
专题 | 地球科学 |
作者单位 | 1.Univ Bologna, Dipartimento Fis & Astron, Bologna, Italy; 2.CNR, Ist Sci Atmosfera & Clima, Bologna, Italy; 3.CNR, Ist Fis Applicata Nello Carrara, Florence, Italy; 4.Univ Waterloo, Dept Chem, Waterloo, ON, Canada; 5.CNR, Ist Applicaz Calcolo, Florence, Italy; 6.Karlsruhe Inst Technol, Inst Meteorol & Climate Res, Karlsruhe, Germany |
推荐引用方式 GB/T 7714 | Valeri, Massimo,Barbara, Flavio,Boone, Chris,et al. CCl4 distribution derived from MIPAS ESA v7 data: intercomparisons, trend, and lifetime estimation[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2017,17(16). |
APA | Valeri, Massimo.,Barbara, Flavio.,Boone, Chris.,Ceccherini, Simone.,Gai, Marco.,...&Zoppetti, Nicola.(2017).CCl4 distribution derived from MIPAS ESA v7 data: intercomparisons, trend, and lifetime estimation.ATMOSPHERIC CHEMISTRY AND PHYSICS,17(16). |
MLA | Valeri, Massimo,et al."CCl4 distribution derived from MIPAS ESA v7 data: intercomparisons, trend, and lifetime estimation".ATMOSPHERIC CHEMISTRY AND PHYSICS 17.16(2017). |
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