Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1016/j.atmosres.2017.08.026 |
Impact of inter-seasonal solar variability on the association of lower troposphere and cold point tropopause in the tropics: Observations using RO data from COSMIC | |
Kumar, V.1; Dhaka, S. K.1; Ho, Shu-Peng2; Singh, Narendra3; Singh, Vir4; Reddy, K. K.5; Chun, H. -Y.6 | |
2017-12-01 | |
发表期刊 | ATMOSPHERIC RESEARCH |
ISSN | 0169-8095 |
EISSN | 1873-2895 |
出版年 | 2017 |
卷号 | 198 |
文章类型 | Article |
语种 | 英语 |
国家 | India; USA; South Korea |
英文摘要 | Association of lower tropospheric variations with the cold point tropopause (CPT) is examined on inter-seasonal basis over the tropical region (30 degrees N-30 degrees S) during 2007-2010 using COSMIC/FORMOST-3 Radio Occultation (RO) data. Temperature analyses for this association are shown over different regions of the globe having contrast topography namely over Western Pacific sector, Indian sector, and African sector. Correlation coefficient (r), taken as a measurement of association, show specific longitudinal differences between the lower troposphere (from 1 km to 5 km height) and the CPT. The northern and southern hemispheres show contrast coupling of temperature variation between lower tropospheric region and the CPT. Land and ocean effects are found to contribute in a different way to the correlation coefficient. Analyses show symmetrical structure of 'r' on both sides of the equator over the African region, as data include mostly land region on both side of equator. Data represent positive correlation (r similar to 0.5) over 15 degrees-20 degrees latitudes on either side of the equator over the African region, suggesting strong hold of the inter-seasonal variation of solar diabatic heating influence over the tropic of Cancer and tropic of Capricorn. On the other hand, there is a contrast behaviour over the Indian region, 'r' is nearly negative (1.0) each year in the southern hemisphere (SH) and positive (similar to 0.4) in the northern hemisphere (NH) with a maxima near tropic of Cancer. Western Pacific region is found to display a linear increase in 'r' from negative (similar to-1.0) in SH to positive (similar to 0.8) in NH. In general, 'r' (positive) maximizes over the land region around 15 degrees-20 degrees latitudes, suggesting a control of in phase inter-seasonal solar heating on the coupling of boundary layer/lower troposphere and CPT region, whereas it turns negative over water body. Analyses suggest that variabilities in CPT over different regions of globe show significant inter-seasonal association with the lower troposphere. Thus CPT variabilities are not only governed by QBO, ENSO, gravity waves and Kelvin wave system as reported in earlier studies but also considerably affected by inter-seasonal changes taking place in the lower troposphere. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000413281000020 |
WOS关键词 | GPS RADIO OCCULTATION ; GRAVITY-WAVES ; ANNUAL CYCLE ; TEMPERATURE ; REGION ; STRATOSPHERE ; CLIMATE ; LAYER ; RETRIEVALS ; ATMOSPHERE |
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/38105 |
专题 | 地球科学 |
作者单位 | 1.Univ Delhi, Rajdhani Coll, Radio & Atmospher Phys Lab, New Delhi, India; 2.Univ Corp Atmospher Res, COSMIC Program Off, Boulder, CO USA; 3.Aryabhatta Res Inst Observat Sci ARIES, Naini Tal, India; 4.Indian Inst Technol, Dept Phys, Roorkee, Uttar Pradesh, India; 5.Yogi Vemana Univ, Dept Phys, Kadapa, India; 6.Yonsei Univ, Dept Atmospher Sci, Seoul, South Korea |
推荐引用方式 GB/T 7714 | Kumar, V.,Dhaka, S. K.,Ho, Shu-Peng,et al. Impact of inter-seasonal solar variability on the association of lower troposphere and cold point tropopause in the tropics: Observations using RO data from COSMIC[J]. ATMOSPHERIC RESEARCH,2017,198. |
APA | Kumar, V..,Dhaka, S. K..,Ho, Shu-Peng.,Singh, Narendra.,Singh, Vir.,...&Chun, H. -Y..(2017).Impact of inter-seasonal solar variability on the association of lower troposphere and cold point tropopause in the tropics: Observations using RO data from COSMIC.ATMOSPHERIC RESEARCH,198. |
MLA | Kumar, V.,et al."Impact of inter-seasonal solar variability on the association of lower troposphere and cold point tropopause in the tropics: Observations using RO data from COSMIC".ATMOSPHERIC RESEARCH 198(2017). |
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