Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.5194/acp-17-6825-2017 |
Mean age of stratospheric air derived from AirCore observations | |
Engel, Andreas1; Boenisch, Harald1,3; Ullrich, Markus1; Sitals, Robert1; Membrive, Olivier2; Danis, Francois2; Crevoisier, Cyril2 | |
2017-06-12 | |
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:11 |
文章类型 | Article |
语种 | 英语 |
国家 | Germany; France |
英文摘要 | Mean age of stratospheric air can be derived from observations of sufficiently long-lived trace gases with approximately linear trends in the troposphere. Mean age can serve as a tracer to investigate stratospheric transport and long-term changes in the strength of the overturning Brewer-Dobson circulation of the stratosphere. For this purpose, a low-cost method is required in order to allow for regular observations up to altitudes of about 30 km. Despite the desired low costs, high precision and accuracy are required in order to determine mean age. We present balloon-borne AirCore observations from two midlatitude sites: Timmins in Ontario/Canada and Lindenberg in Germany. During the Timmins campaign, five AirCores sampled air in parallel with a large stratospheric balloon and were analysed for CO2, CH4 and partly CO. We show that there is good agreement between the different AirCores ( better than 0.1 %), especially when vertical gradients are small. The measurements from Lindenberg were performed using small low-cost balloons and yielded very comparable results. We have used the observations to extend our long-term data set of mean age observations at Northern Hemisphere midlatitudes. The time series now covers more than 40 years and shows a small, statistically non-significant positive trend of 0.15 +/- 0.18 years decade(-1). This trend is slightly smaller than the previous estimate of 0.24 +/- 0.22 years decade(-1) which was based on observations up to the year 2006. These observations are still in contrast to strong negative trends of mean age as derived from some model calculations. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000403214200002 |
WOS关键词 | IN-SITU MEASUREMENTS ; LOWERMOST STRATOSPHERE ; UPPER TROPOSPHERE ; POLAR VORTEX ; WATER-VAPOR ; TRANSPORT ; CO2 ; H2O ; CH4 |
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/30793 |
专题 | 地球科学 |
作者单位 | 1.Goethe Univ Frankfurt, Inst Atmospher & Environm Sci, Frankfurt, Germany; 2.Univ Paris Saclay, Ecole Polytech, CNRS, LMD,IPSL, Palaiseau, France; 3.Karlsruhe Inst Technol, Karlsruhe, Germany |
推荐引用方式 GB/T 7714 | Engel, Andreas,Boenisch, Harald,Ullrich, Markus,et al. Mean age of stratospheric air derived from AirCore observations[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2017,17(11). |
APA | Engel, Andreas.,Boenisch, Harald.,Ullrich, Markus.,Sitals, Robert.,Membrive, Olivier.,...&Crevoisier, Cyril.(2017).Mean age of stratospheric air derived from AirCore observations.ATMOSPHERIC CHEMISTRY AND PHYSICS,17(11). |
MLA | Engel, Andreas,et al."Mean age of stratospheric air derived from AirCore observations".ATMOSPHERIC CHEMISTRY AND PHYSICS 17.11(2017). |
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