Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/2016JD026183 |
Statistical Characteristics of Convective Clouds over the Western Ghats Derived from Weather Radar Observations | |
Utsav, Bhowmik1,2; Deshpande, Sachin M.1; Das, Subrata K.1; Pandithurai, Govindan1 | |
2017-09-27 | |
发表期刊 | JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES |
ISSN | 2169-897X |
EISSN | 2169-8996 |
出版年 | 2017 |
卷号 | 122期号:18 |
文章类型 | Article |
语种 | 英语 |
国家 | India |
英文摘要 | X-band radar observations at Mandhardev (18.04 degrees N, 73.85 degrees E) are used to investigate statistics of convective clouds over the Western Ghats during monsoon season (June-September 2014). Convective storms (cells) are identified using an objective-tracking method to examine their spatiotemporal variability, thus quantifying the time-continuous aspects of convective cloud population over the region for the first time. An increased frequency of storm location and initiation along the windward mountains compared to coastal and lee side highlights orographic response to southwesterly flow, with superimposed diurnal cycle. An eastward progression of convective activity from upstream the barrier through windward slopes of mountains over to the lee side is observed. Storm area, height, and duration follow lognormal distributions; wherein, small-sized storms contribute more to total population and unimodal distribution of 35 dBZ top heights (peaking at 5.5 km) depicts the dominance of shallow convection. Storms exhibit a pronounced diurnal cycle with a peak in afternoon hours, while the convective area maximum is delayed by several hours to that of precipitation flux. Cell lifetime and propagation show that cells move with slow speeds and have mean duration of 46 min. They align east-west nearly parallel to mountain ridges, and their direction of movement is steered mostly by large-scale winds at lower levels. Based on top heights, convective cells are further classified into cumulus, congestus, and deep clouds. In general, congestus (deep) cells are most abundant in the windward (leeward) side. A lead-lag relationship between congestus and deep cells indicates midtroposphere moistening by congestus cells prior to deep convection. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000416388000029 |
WOS关键词 | WARM-SEASON PRECIPITATION ; TROPICAL CONVECTION ; ASIAN MONSOON ; DEEP CUMULONIMBUS ; SUMMER MONSOON ; SYDNEY AREA ; TOGA COARE ; STORMS ; RAIN ; ENVIRONMENT |
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/33102 |
专题 | 气候变化 |
作者单位 | 1.Indian Inst Trop Meteorol, Pune, Maharashtra, India; 2.Savitribai Phule Pune Univ, Dept Atmospher & Space Sci, Pune, Maharashtra, India |
推荐引用方式 GB/T 7714 | Utsav, Bhowmik,Deshpande, Sachin M.,Das, Subrata K.,et al. Statistical Characteristics of Convective Clouds over the Western Ghats Derived from Weather Radar Observations[J]. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,2017,122(18). |
APA | Utsav, Bhowmik,Deshpande, Sachin M.,Das, Subrata K.,&Pandithurai, Govindan.(2017).Statistical Characteristics of Convective Clouds over the Western Ghats Derived from Weather Radar Observations.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,122(18). |
MLA | Utsav, Bhowmik,et al."Statistical Characteristics of Convective Clouds over the Western Ghats Derived from Weather Radar Observations".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 122.18(2017). |
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