Carbonyl Sulphide (OCS) Variability with Latitude in the Atmosphere

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2015-01-01 DOI:10.1080/07055900.2013.876609

G. Krysztofiak, Y. Té, V. Catoire, G. Berthet, G. Toon, F. Jégou, P. Jeseck, C. Robert

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引用次数: 27

Abstract

Abstract Carbonyl sulphide (OCS) is an important precursor of sulphate aerosols and consequently a key species in stratospheric ozone depletion. The SPectromètre InfraRouge d'Absorption à Lasers Embarqués (SPIRALE) and shortwave infrared (SWIR) balloon-borne instruments have flown in the tropics and in the polar Arctic, and ground-based measurements have been performed by the Qualité de l'Air (QualAir) Fourier Transform Spectrometer in Paris. Partial and total columns and vertical profiles have been obtained to study OCS variability with altitude, latitude, and season. The annual total column variation in Paris reveals a seasonal variation with a maximum in April–June and a minimum in November–January. Total column measurements above Paris and from SWIR balloon-borne instrument are compared with several MkIV measurements, several Network for the Detection of Atmospheric Composition Change (NDACC) stations, aircraft, ship, and balloon measurements to highlight the OCS total column decrease from tropical to polar latitudes. OCS high-resolution in situ vertical profiles have been measured for the first time in the altitude range between 14 and 30 km at tropical and polar latitudes. OCS profiles are compared with Atmospheric Chemistry Experiment (ACE) satellite measurements and show good agreement. Using the correlation between OCS and N2O from SPIRALE, the OCS stratospheric lifetime has been accurately determined. We find a stratospheric lifetime of 68 ± 20 years at polar latitudes and 58 ± 14 years at tropical latitudes leading to a global stratospheric sink of 49 ± 14 Gg S y−1.

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大气中羰基硫化物(OCS)随纬度的变化

羰基硫化物(OCS)是硫酸盐气溶胶的重要前体，因此是平流层臭氧消耗的关键物质。红外吸收激光器(SPIRALE)和短波红外(SWIR)气球载仪器已在热带和极地北极飞行，地面测量由巴黎的qualit de l'Air (QualAir)傅立叶变换光谱仪进行。研究了OCS随海拔、纬度和季节的变化规律。巴黎年总柱变化呈季节性变化，4 - 6月最大，11 - 1月最小。将巴黎上空和SWIR气球载仪器的总柱测量值与若干MkIV测量值、若干大气成分变化探测网络(NDACC)站、飞机、船舶和气球测量值进行比较，以突出OCS总柱从热带到极地纬度的减少。OCS高分辨率原位垂直剖面首次在热带和极地纬度14至30公里的高度范围内进行了测量。将OCS剖面与大气化学实验(ACE)卫星测量结果进行了比较，结果吻合较好。利用SPIRALE的OCS与N2O的相关性，可以准确地确定OCS的平流层寿命。我们发现，平流层寿命在极纬为68±20年，在热带纬为58±14年，导致全球平流层汇为49±14 Gg S y−1。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.