Increasing pre-monsoon rain days over four stations of Kerala, India

Increasing pre-monsoon rain days over four stations of Kerala, India

The climate of India varies greatly by region, as seen by wind patterns, temperature and rainfall, seasonal rhythms and the degree of wetness or dryness. During the several seasons, the weather conditions change. Changes in meteorological factors (temperature, pressure, wind direction and velocity,...

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Bibliographic Details
Published in:Acta geophysica Vol. 70; no. 2; pp. 963 - 978
Main Authors: Umakanth, Nandivada, Kalyan, S. S. S., Satyanarayana, Gubbala China, Gogineni, Rajesh, Nagarjuna, Ayachithula, Naveen, Ramisetti, Rao, Kokkerapati Ramachandra, Rao, Myla Chimpiri
Format: Journal Article
Language:English
Published: Cham Springer International Publishing 01-04-2022
Springer Nature B.V
Subjects:
Convective available potential energy
Daily rainfall
Dew point
Dew point depression
Earth and Environmental Science
Earth Sciences
Geophysics/Geodesy
Geotechnical Engineering & Applied Earth Sciences
Global precipitation
Humidity
Humidity indexes
Moisture effects
Monsoon rainfall
Monsoons
Potential energy
Precipitable water
Precipitation
Precipitation patterns
Rain
Rainfall
Relative humidity
Research Article - Atmospheric & Space Sciences
Structural Geology
Weather
Weather conditions
Wind
Wind direction
Kerala India
India
Convective system
Precipitation
Dew point depression
Analysis
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Summary:The climate of India varies greatly by region, as seen by wind patterns, temperature and rainfall, seasonal rhythms and the degree of wetness or dryness. During the several seasons, the weather conditions change. Changes in meteorological factors (temperature, pressure, wind direction and velocity, humidity and precipitation, etc.) cause these changes. The pre-monsoon season (PRMS) comprises of March, April and May months. The precipitation patterns observed in PRMS are crucial because it affects a variety of crop-related operations across the country. The lifting index (LI), K index (KI), total totals index (TTI), humidity index (HI), improved k index, improved total totals index, total precipitable water (TPW) and convective available potential energy (CAPE) are studied at four locations in Kerala during PRMS. These variables were examined on rain day (RD)’s and no rain day (NRD)’s. The four stations we chose for our investigation were Thiruvananthapuram, Kochi, Alappuzha and Kannur. The GPM IMERG (Integrated Multi-satellite Retrievals for Global Precipitation Measurement) daily rainfall datasets have been utilized for this analysis. Fifth-generation ECMWF atmospheric reanalysis (ERA5) daily data for the PRMS of 2021 were used to measure all rainfall-related variables. During PRMS, all metrics clearly distinguished the RD and NRD. The rise in relative humidity and observations of dew point depression indicates that there is enough moisture for convective rain. In May, there were more negative VV values than in April.
ISSN:1895-7455
1895-6572
1895-7455
DOI:10.1007/s11600-022-00742-6