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DOI | 10.5194/acp-18-1457-2018 |
Assessing the ability to derive rates of polar middle-atmospheric descent using trace gas measurements from remote sensors | |
Ryan, Niall J.1; Kinnison, Douglas E.2; Garcia, Rolando R.2; Hoffmann, Christoph G.3; Palm, Mathias1; Raffalski, Uwe4; Notholt, Justus1 | |
2018-02-02 | |
发表期刊 | ATMOSPHERIC CHEMISTRY AND PHYSICS
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ISSN | 1680-7316 |
EISSN | 1680-7324 |
出版年 | 2018 |
卷号 | 18期号:3页码:1457-1474 |
文章类型 | Article |
语种 | 英语 |
国家 | Germany; USA; Sweden |
英文摘要 | We investigate the reliability of using trace gas measurements from remote sensing instruments to infer polar atmospheric descent rates during winter within 46-86 km altitude. Using output from the Specified Dynamics Whole Atmosphere Community Climate Model (SD-WACCM) between 2008 and 2014, tendencies of carbon monoxide (CO) volume mixing ratios (VMRs) are used to assess a common assumption of dominant vertical advection of tracers during polar winter. The results show that dynamical processes other than vertical advection are not negligible, meaning that the transport rates derived from trace gas measurements do not represent the mean descent of the atmosphere. The relative importance of vertical advection is lessened, and exceeded by other processes, during periods directly before and after a sudden stratospheric warming, mainly due to an increase in eddy transport. It was also found that CO chemistry cannot be ignored in the mesosphere due to the night-time layer of OH at approximately 80km altitude. CO VMR profiles from the Kiruna Microwave Radiometer and the Microwave Limb Sounder were compared to SD-WACCM output, and show good agreement on daily and seasonal timescales. SD-WACCM CO profiles are combined with the CO tendencies to estimate errors involved in calculating the mean descent of the atmosphere from remote sensing measurements. The results indicate errors on the same scale as the calculated descent rates, and that the method is prone to a misinterpretation of the direction of air motion. The "true" rate of atmospheric descent is seen to be masked by processes, other than vertical advection, that affect CO. We suggest an alternative definition of the rate calculated using remote sensing measurements: not as the mean descent of the atmosphere, but as an effective rate of vertical transport for the trace gas under observation. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000424049100001 |
WOS关键词 | ENERGETIC PARTICLE-PRECIPITATION ; CARBON-MONOXIDE ; OZONE LOSS ; CO ; TRANSPORT ; VORTEX ; KIRUNA ; MLS ; VARIABILITY ; 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/26138 |
专题 | 地球科学 |
作者单位 | 1.Univ Bremen, Inst Environm Phys, D-28359 Bremen, Germany; 2.Natl Ctr Atmospher Res, Atmospher Chem Observat & Modeling Lab, POB 3000, Boulder, CO 80307 USA; 3.Ernst Moritz Arndt Univ Greifswald, Inst Phys, Felix Hausdorff Str 6, D-17489 Greifswald, Germany; 4.Swedish Inst Space Phys, Box 812, S-98128 Kiruna, Sweden |
推荐引用方式 GB/T 7714 | Ryan, Niall J.,Kinnison, Douglas E.,Garcia, Rolando R.,et al. Assessing the ability to derive rates of polar middle-atmospheric descent using trace gas measurements from remote sensors[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2018,18(3):1457-1474. |
APA | Ryan, Niall J..,Kinnison, Douglas E..,Garcia, Rolando R..,Hoffmann, Christoph G..,Palm, Mathias.,...&Notholt, Justus.(2018).Assessing the ability to derive rates of polar middle-atmospheric descent using trace gas measurements from remote sensors.ATMOSPHERIC CHEMISTRY AND PHYSICS,18(3),1457-1474. |
MLA | Ryan, Niall J.,et al."Assessing the ability to derive rates of polar middle-atmospheric descent using trace gas measurements from remote sensors".ATMOSPHERIC CHEMISTRY AND PHYSICS 18.3(2018):1457-1474. |
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