Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/2017GL075643 |
Evidence of the Lower Thermospheric Winter-to-Summer Circulation From SABER CO2 Observations | |
Qian, Liying1; Burns, Alan1; Yue, Jia2,3 | |
2017-10-28 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS |
ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2017 |
卷号 | 44期号:20 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | Numerical studies have shown that there is a lower thermospheric winter-to-summer circulation that is driven by wave dissipation and that it plays a significant role in trace gas distributions in the mesosphere and lower thermosphere, and in the composition of the thermosphere. However, the characteristics of this circulation are poorly known. Direct observations of it are difficult, but it leaves clear signatures in tracer distributions. The Sounding of the Atmosphere using Broadband Emission Radiometry (SABER) onboard the Thermosphere Ionosphere Mesosphere Energetics and Dynamics satellite has obtained CO2 concentration from 2002 to present. This data set, combined with simulations by the Whole Atmosphere Community Climate Model, provides an unprecedented opportunity to infer the morphology of this circulation in both the summer and winter hemispheres. Our study show that there exists a maximum vertical gradient of CO2 at summer high latitudes, driven by the convergence of the upwelling of the mesospheric circulation and the downwelling of the lower thermospheric circulation; in the winter hemisphere, the maximum vertical gradient of CO2 is located at a higher altitude, driven by the convergence of the upwelling of the lower thermospheric circulation and the downwelling of the solar-driven thermospheric circulation; the bottom of the lower thermospheric circulation is located between similar to 95 km and 100 km, and it has a vertical extent of similar to 10 km. Analysis of the SABER CO2 and temperature at summer high latitudes showed that the bottom of this circulation is consistently higher than the mesopause height by similar to 10 km. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000416761600002 |
WOS关键词 | LATENT-HEAT RELEASE ; GRAVITY-WAVE ; MESOSPHERE ; BREAKING ; MIDDLE ; TIDES |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
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/27665 |
专题 | 气候变化 |
作者单位 | 1.Natl Ctr Atmospher Res, High Altitude Observ, Pob 3000, Boulder, CO 80307 USA; 2.Hampton Univ, Ctr Atmospher Sci, Hampton, VA 23668 USA; 3.Univ Maryland, ESSIC, College Pk, MD 20742 USA |
推荐引用方式 GB/T 7714 | Qian, Liying,Burns, Alan,Yue, Jia. Evidence of the Lower Thermospheric Winter-to-Summer Circulation From SABER CO2 Observations[J]. GEOPHYSICAL RESEARCH LETTERS,2017,44(20). |
APA | Qian, Liying,Burns, Alan,&Yue, Jia.(2017).Evidence of the Lower Thermospheric Winter-to-Summer Circulation From SABER CO2 Observations.GEOPHYSICAL RESEARCH LETTERS,44(20). |
MLA | Qian, Liying,et al."Evidence of the Lower Thermospheric Winter-to-Summer Circulation From SABER CO2 Observations".GEOPHYSICAL RESEARCH LETTERS 44.20(2017). |
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