Linsha C. L , Reshma T , Hamza Varikoden , Vishnu R
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引用次数: 0
Abstract
The characteristics of thermodynamic parameters at different pressure levels have been studied using radiosonde data for the period 1989–2019 during different seasons incorporating sea-land breeze circulation influences over Kochi, in western peninsular India. It is also observed that the variation in lower tropospheric stability of (LTS) is found to be influenced by other thermodynamic parameters, such as temperature, mixing ratio, potential temperature, equivalent potential temperature, CAPE, and CINE at various pressure levels. The average value of temperature, potential temperature, mixing ratio, and equivalent potential temperature was maximum during the pre-monsoon season. At 700 hPa level, the average value of the mixing ratio was high during the sea breeze circulation of pre-monsoon season. The average value of equivalent potential temperature at 700 hPa level was maximum for the southwest monsoon season. A decreasing trend was observed in lower tropospheric stability (LTS) over the region in all seasons except for the winter season during the sea breeze circulation. The positive trend of LTS was observed during the sea breeze circulation time during the winter season, and it has a strong correlation with the positive trend in temperature and potential temperature at the 700 hPa level. Moreover, the southwest monsoon season exhibited a substantial decrease in LTS, potentially associated with an increasing trend in temperature, potential temperature, mixing ratio, and equivalent potential temperature at the surface level. CAPE has a significant increasing trend only for the sea breeze circulation period during the monsoon season. Additionally, CINE displayed an increasing trend across all seasons, with higher values observed during the winter and post-monsoon seasons.
期刊介绍:
The Journal of Atmospheric and Solar-Terrestrial Physics (JASTP) is an international journal concerned with the inter-disciplinary science of the Earth''s atmospheric and space environment, especially the highly varied and highly variable physical phenomena that occur in this natural laboratory and the processes that couple them.
The journal covers the physical processes operating in the troposphere, stratosphere, mesosphere, thermosphere, ionosphere, magnetosphere, the Sun, interplanetary medium, and heliosphere. Phenomena occurring in other "spheres", solar influences on climate, and supporting laboratory measurements are also considered. The journal deals especially with the coupling between the different regions.
Solar flares, coronal mass ejections, and other energetic events on the Sun create interesting and important perturbations in the near-Earth space environment. The physics of such "space weather" is central to the Journal of Atmospheric and Solar-Terrestrial Physics and the journal welcomes papers that lead in the direction of a predictive understanding of the coupled system. Regarding the upper atmosphere, the subjects of aeronomy, geomagnetism and geoelectricity, auroral phenomena, radio wave propagation, and plasma instabilities, are examples within the broad field of solar-terrestrial physics which emphasise the energy exchange between the solar wind, the magnetospheric and ionospheric plasmas, and the neutral gas. In the lower atmosphere, topics covered range from mesoscale to global scale dynamics, to atmospheric electricity, lightning and its effects, and to anthropogenic changes.