Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1007/s00382-018-4458-y |
Widespread fog over the Indo-Gangetic Plains and possible links to boreal winter teleconnections | |
Hingmire, Dipti1,2; Vellore, Ramesh K.1; Krishnan, R.1; Ashtikar, N. V.3; Singh, Bhupendra B.1; Sabade, Sudhir1; Madhura, R. K.1,4 | |
2019-05-01 | |
发表期刊 | CLIMATE DYNAMICS |
ISSN | 0930-7575 |
EISSN | 1432-0894 |
出版年 | 2019 |
卷号 | 52页码:5477-5506 |
文章类型 | Article |
语种 | 英语 |
国家 | India |
英文摘要 | Boreal wintertime planetary-scale atmospheric circulations and their possible consequences to widespread fog occurrences over the Indo-Gangetic Plains (IGP) region of the Himalayan valley are investigated in this study. Among the different fog types, radiation fog type seen at night or early morning hours favored by large-scale subsidence aloft and strong near-surface inversion is focused in this study. A composite analysis reveals that upper air circulation associated with 105 fog days over the IGP region show a trail linked to circulation anomalies over the Eurasian continents and the Arctic Circle. The findings suggest that there is a footprint of the Arctic Oscillation (AO) and conventional Eurasian (EU) circulation patterns linked to anticyclonic circulation aloft over the IGP region. Although widespread IGP fog occurrences under the large-scale subsidence environment are seen to occur during both phases of AO, the negative AO phase (high pressure environment over the Arctic Circle) portends a greater likelihood for fog occurrences in the IGP region. A coupling of positive mid-tropospheric height anomalies over western Eurasia and the anticyclonic circulation anomalies over the IGP region is evident during the IGP fog periods concomitant with EU positive (height excess over Siberia) phase. Further, anomalous circulation over the IGP region during the fog periods appears to rely more on the strength of the AO negative phase than the circulation strengths over Eurasia. On the contrary, the Eurasian circulation largely appears to influence the subsidence aloft over the IGP region irrespective of the strength of the AO positive phase. It is also noted that upper-air circulation during non-foggy periods over the IGP region has conformity with positive AO phase and rapidly progressing EU pattern. These planetary-scale teleconnection pathways offer new dynamical insights into comprehending widespread IGP fog scenario, which have been hitherto perceived mostly from a regional context. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000465441400023 |
WOS关键词 | RADIATION FOG ; WESTERN DISTURBANCES ; GEOPOTENTIAL HEIGHT ; ARCTIC OSCILLATION ; UNITED-STATES ; IGI AIRPORT ; PART I ; VARIABILITY ; AEROSOL ; DELHI |
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/182599 |
专题 | 气候变化 |
作者单位 | 1.Indian Inst Trop Meteorol, Ctr Climate Change Res, Pune 411008, Maharashtra, India; 2.Savitribai Phule Pune Univ, Dept Atmospher & Space Sci, Pune, Maharashtra, India; 3.Indian Meteorol Dept, Natl Data Ctr, Pune, Maharashtra, India; 4.Modern Coll Arts Sci & Commerce, Dept Phys, Pune, Maharashtra, India |
推荐引用方式 GB/T 7714 | Hingmire, Dipti,Vellore, Ramesh K.,Krishnan, R.,et al. Widespread fog over the Indo-Gangetic Plains and possible links to boreal winter teleconnections[J]. CLIMATE DYNAMICS,2019,52:5477-5506. |
APA | Hingmire, Dipti.,Vellore, Ramesh K..,Krishnan, R..,Ashtikar, N. V..,Singh, Bhupendra B..,...&Madhura, R. K..(2019).Widespread fog over the Indo-Gangetic Plains and possible links to boreal winter teleconnections.CLIMATE DYNAMICS,52,5477-5506. |
MLA | Hingmire, Dipti,et al."Widespread fog over the Indo-Gangetic Plains and possible links to boreal winter teleconnections".CLIMATE DYNAMICS 52(2019):5477-5506. |
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