Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1016/j.atmosres.2018.03.012 |
Diurnal and long-term variation of instability indices over a tropical region in India | |
Chakraborty, Rohit; Basha, Ghouse; Ratnam, M. Venkat | |
2018-07-15 | |
发表期刊 | ATMOSPHERIC RESEARCH
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ISSN | 0169-8095 |
EISSN | 1873-2895 |
出版年 | 2018 |
卷号 | 207页码:145-154 |
文章类型 | Article |
语种 | 英语 |
国家 | India |
英文摘要 | Climatology of atmospheric instability is studied over Gadanki using high-resolution radiosonde launched daily during April 2006 to April 2017. The diurnal and seasonal variation of instability parameters is discussed in relation with surface meteorological parameters. Seasonal variations depict strong variability in instability which is masked by stronger diurnal variation with descending Lifting Condensation Level (LCL) and Level of Free Convection (LFC) between 11 and 18 IST resulting in high Convective Available Potential Energy (CAPE) values and heavy rainfall. On a seasonal basis, parcel parameters are high during the late monsoon and post monsoon while the instability parameters like Total Totals index (TT) and Vertical Totals index (VT) show highest values in the pre-monsoon associated with strong convection. LFC and LCL start descending with ascent in Equilibrium Level (EL) before the monsoon onset. However after the onset, atmospheric instability falls sharply as supported by decreasing TT, VT and CAPE with increasing LI. The 11-year long-term variation depicts slightly elevated LFC and LCL and declining EL values indicating a decrease in the instability with a decrease in CAPE and K Index (KI) and increase in Lifted Index (LI) and Convective Inhibition (CIN). |
英文关键词 | Instability Radiosonde Seasonal diurnal variation Monsoon onset Long-term trend |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000430901800012 |
WOS关键词 | URBAN METROPOLIS ; RADIOSONDE ; SATELLITE ; SOUNDINGS ; RAINFALL ; ASSOCIATION ; TEMPERATURE ; VARIABILITY ; CONVECTION ; STABILITY |
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/37953 |
专题 | 地球科学 |
作者单位 | Natl Atmospher Res Lab, Tirupati 517502, Andhra Pradesh, India |
推荐引用方式 GB/T 7714 | Chakraborty, Rohit,Basha, Ghouse,Ratnam, M. Venkat. Diurnal and long-term variation of instability indices over a tropical region in India[J]. ATMOSPHERIC RESEARCH,2018,207:145-154. |
APA | Chakraborty, Rohit,Basha, Ghouse,&Ratnam, M. Venkat.(2018).Diurnal and long-term variation of instability indices over a tropical region in India.ATMOSPHERIC RESEARCH,207,145-154. |
MLA | Chakraborty, Rohit,et al."Diurnal and long-term variation of instability indices over a tropical region in India".ATMOSPHERIC RESEARCH 207(2018):145-154. |
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