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DOI | 10.1007/s00382-016-3293-2 |
Investigations of the middle atmospheric thermal structure and oscillations over sub-tropical regions in the Northern and Southern Hemispheres | |
Sharma, Som1; Kumar, Prashant2; Jethva, Chintan1,3; Vaishnav, Rajesh1; Bencherif, Hassan4 | |
2017-06-01 | |
发表期刊 | CLIMATE DYNAMICS |
ISSN | 0930-7575 |
EISSN | 1432-0894 |
出版年 | 2017 |
卷号 | 48期号:11 |
文章类型 | Article |
语种 | 英语 |
国家 | India; France |
英文摘要 | The temperature retrieved from the Sounding of the Atmosphere using Broadband Emission Radiometry (SABER) onboard Thermosphere Ionosphere Mesosphere Energetics and Dynamics (TIMED) satellite during January 2002 to September 2015 are used in this study to delineate the differences of middle atmospheric thermal structure in the Northern Hemisphere (NH) and Southern Hemisphere (SH). Two stations namely Mt. Abu (24.59A degrees N, 72.70A degrees E) in NH and Reunion Island (21.11A degrees S, 55.53A degrees E) in SH are chosen over sub-tropical regions. Temperature climatology from SABER observations suggests that stratopause is warmer, and upper mesosphere is cooler in NH as compared to SH. Three atmospheric models are used to understand the monthly thermal structure differences for different altitudes. Moreover, semi-annual, annual and quasi-biennial oscillations are studied using Lomb Scargle Periodogram and Wavelet transform techniques. Over NH, summer and winter season are warmer (similar to 4 K) and cooler (similar to 3 K) respectively in stratosphere as compared to SH. It is important to note here that Mt. Abu temperature is warmer (similar to 9 K) than Reunion Island in winter but in summer season Mt. Abu temperature is cooler in upper mesosphere and above mesosphere NH shows warming. Results show that annual oscillations are dominated in both hemisphere as compared to semi-annual and quasi-biennial oscillations. In upper mesosphere, strength of annual oscillations is substantial in NH, while semi-annual oscillations are stronger in SH. Wavelet analyses found that annual oscillations are significant in NH near mesopause, while semi-annual oscillations are strengthening in SH. |
英文关键词 | Atmospheric dynamics Middle Atmosphere SABER Atmospheric models |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000402122200014 |
WOS关键词 | MEAN-FLOW INTERACTION ; RAYLEIGH LIDAR OBSERVATIONS ; QUASI-BIENNIAL OSCILLATION ; TEMPERATURE VARIABILITY ; KINETIC TEMPERATURE ; LIMB EMISSION ; SPACED DATA ; WAVE ; CLIMATOLOGY ; VALIDATION |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | 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/35868 |
专题 | 气候变化 |
作者单位 | 1.Phys Res Lab, Ahmadabad 380009, Gujarat, India; 2.Space Applicat Ctr ISRO, Ahmadabad 380015, Gujarat, India; 3.Saurashtra Univ, Dept Phys, Rajkot, Gujarat, India; 4.LACY, Lab Atmosphere & Cyclones, St Denis, Reunion, France |
推荐引用方式 GB/T 7714 | Sharma, Som,Kumar, Prashant,Jethva, Chintan,et al. Investigations of the middle atmospheric thermal structure and oscillations over sub-tropical regions in the Northern and Southern Hemispheres[J]. CLIMATE DYNAMICS,2017,48(11). |
APA | Sharma, Som,Kumar, Prashant,Jethva, Chintan,Vaishnav, Rajesh,&Bencherif, Hassan.(2017).Investigations of the middle atmospheric thermal structure and oscillations over sub-tropical regions in the Northern and Southern Hemispheres.CLIMATE DYNAMICS,48(11). |
MLA | Sharma, Som,et al."Investigations of the middle atmospheric thermal structure and oscillations over sub-tropical regions in the Northern and Southern Hemispheres".CLIMATE DYNAMICS 48.11(2017). |
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