First observational investigation on the temporal trends of Vertical Total Electron Content (VTEC) over an equatorial station: Discerning the impacts of Mora and Ockhi – Two tropical cyclones in 2017

IF 2.8 3区地球科学 Q2 ASTRONOMY & ASTROPHYSICS

Advances in Space Research Pub Date : 2025-02-15 DOI:10.1016/j.asr.2024.11.078

Swati Chowdhury, D. Bala Subrahamanyam, R.K. Choudhary

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Abstract

This study examines the impact of two tropical cyclones (Mora and Ockhi, 2017) over the Northern Indian Ocean on vertical total electron content (VTEC) over Trivandrum, by comparing data from similar periods in 2018 and 2019. To ensure accuracy, a precise data-screening method was implemented to exclude the potential effects of geomagnetic storms and other tropical cyclones on VTEC. Results showed a significant depletion in VTEC, ranging from 7% to 19%, which varied based on the intensity of the cyclones and their distance from the measurement site. The period analyzed coincided with the declining phase of the 24th solar cycle, during which VTEC naturally decreased from 2017 to 2019. The present analysis reports a sharp depletion in the VTEC during the passage of the cyclone, the first of its kind, emphasizing the TC-influence on the upper atmosphere, which was seen to extend even after the landfall.

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来源期刊

Advances in Space Research 地学天文-地球科学综合

CiteScore

5.20

自引率

11.50%

发文量

800

审稿时长

5.8 months

期刊介绍： The COSPAR publication Advances in Space Research (ASR) is an open journal covering all areas of space research including: space studies of the Earth''s surface, meteorology, climate, the Earth-Moon system, planets and small bodies of the solar system, upper atmospheres, ionospheres and magnetospheres of the Earth and planets including reference atmospheres, space plasmas in the solar system, astrophysics from space, materials sciences in space, fundamental physics in space, space debris, space weather, Earth observations of space phenomena, etc. NB: Please note that manuscripts related to life sciences as related to space are no more accepted for submission to Advances in Space Research. Such manuscripts should now be submitted to the new COSPAR Journal Life Sciences in Space Research (LSSR). All submissions are reviewed by two scientists in the field. COSPAR is an interdisciplinary scientific organization concerned with the progress of space research on an international scale. Operating under the rules of ICSU, COSPAR ignores political considerations and considers all questions solely from the scientific viewpoint.