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DOI10.1007/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
ISSN0930-7575
EISSN1432-0894
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
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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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