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DOI | 10.1029/2018GL078968 |
On the Responses of Mesosphere and Lower Thermosphere Temperatures to Geomagnetic Storms at Low and Middle Latitudes | |
Li, Jingyuan1,2; Wang, Wenbin2; Lu, Jianyong1; Yuan, Tao3; Yue, Jia4,5; Liu, Xiao6,7; Zhang, Kedeng8; Burns, Alan G.2; Zhang, Yongliang9; Li, Zheng1,2 | |
2018-10-16 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS |
ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2018 |
卷号 | 45期号:19页码:10128-10137 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China; USA |
英文摘要 | Observations from lidars and satellites have shown that large neutral temperature increases and decreases occur in the middle and low latitudes of the mesosphere and lower thermosphere region during geomagnetic storms. Here we undertake first-principles simulations of mesosphere and lower thermosphere temperature responses to storms using the Thermosphere Ionosphere Mesosphere Electrodynamics General Circulation Model to elucidate the nature and causes of these changes. Temperature variations were not uniform; instead, nighttime temperatures changed earlier than daytime temperatures, and temperatures changed earlier at high latitudes than at low ones. Furthermore, temperatures increased in some places/times and decreased in others. As the simulation behaves similar to observations, it provides an opportunity to understand physical processes that drive the observed changes. Our analysis has shown that they were producedmainly by adiabatic heating/cooling that was associated with vertical winds resulting from general circulation changes, with additional contributions from vertical heat advection. Plain Language Summary Both ground-and space-based observations have showed that storm time temperature have strong variations in the mesosphere and lower thermosphere (MLT) region. However, the possible physical mechanisms causing these storm time thermal responses have not been fully understood. Therefore, in this paper, we use the Thermosphere Ionosphere Mesosphere Electrodynamics General Circulation Model to investigate the possible mechanisms for the observed storm time temperature changes in the MLT region. As the simulation behaves similar to observations, it provides an opportunity to understand physical processes that drive the observed changes. By analyzing Thermosphere Ionosphere Mesosphere Electrodynamics General Circulation Model results, we found storm time adiabatic heating/cooling and vertical heat advection, both associated with changes in vertical winds, are the MLT-dominant heating processes in the MLT region at middle latitudes. Horizontal heat advection and radiative cooling also contribute to temperature changes, but they occur later than the other major heating terms. At middle and low latitudes, MLT changes are first seen in the vertical winds, followed by temperature changes; horizontal winds change later. The changes of vertical winds in the MLT region are associated with those occurring at higher altitudes. There is no direct contribution of auroral Joule heating and particle heating to the storm time MLT temperature changes at middle latitudes. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000448656800013 |
WOS关键词 | NEUTRAL WINDS ; IONOSPHERE ; MODEL ; JOULE |
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/28612 |
专题 | 气候变化 |
作者单位 | 1.Nanjing Univ Informat Sci & Technol, Coll Math & Stat, Inst Space Weather, Nanjing, Jiangsu, Peoples R China; 2.Natl Ctr Atmospher Res, High Altitude Observ, POB 3000, Boulder, CO 80307 USA; 3.Utah State Univ, Ctr Atmospher & Space Sci, Logan, UT 84322 USA; 4.Hampton Univ, Atmospher & Planetary Sci, Hampton, VA 23668 USA; 5.Univ Maryland, ESSIC, College Pk, MD 20742 USA; 6.Henan Normal Univ, Sch Math & Informat Sci, Henan Engn Lab Big Data Stat Anal & Optimal Contr, Xinxiang, Peoples R China; 7.Chinese Acad Sci, Natl Space Sci Ctr, State Key Lab Space Weather, Beijing, Peoples R China; 8.Wuhan Univ, Sch Elect Informat, Dept Space Phys, Wuhan, Hubei, Peoples R China; 9.Johns Hopkins Univ, Appl Phys Lab, Laurel, MD USA |
推荐引用方式 GB/T 7714 | Li, Jingyuan,Wang, Wenbin,Lu, Jianyong,et al. On the Responses of Mesosphere and Lower Thermosphere Temperatures to Geomagnetic Storms at Low and Middle Latitudes[J]. GEOPHYSICAL RESEARCH LETTERS,2018,45(19):10128-10137. |
APA | Li, Jingyuan.,Wang, Wenbin.,Lu, Jianyong.,Yuan, Tao.,Yue, Jia.,...&Li, Zheng.(2018).On the Responses of Mesosphere and Lower Thermosphere Temperatures to Geomagnetic Storms at Low and Middle Latitudes.GEOPHYSICAL RESEARCH LETTERS,45(19),10128-10137. |
MLA | Li, Jingyuan,et al."On the Responses of Mesosphere and Lower Thermosphere Temperatures to Geomagnetic Storms at Low and Middle Latitudes".GEOPHYSICAL RESEARCH LETTERS 45.19(2018):10128-10137. |
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