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All Journal Jurnal Widya Climago Journal of Geosciences and Environmental Studies
Nugroho, Anendha Destantyo
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Humanities Astronomy Earth & Planetary Sciences Education Energy Environmental Science Social Sciences Other

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PENGARUH PANDEMIK COVID-19 TERHADAP KUALITAS UDARA DI BEBERAPA KOTA BESAR DI INDONESIA MEMANFAATKAN DATA PERMODELAN CUACA Nugroho, Anendha Destantyo
Jurnal Widya Climago Vol 2 No 2 (2020): Adaptasi Kebiasaan Baru
Publisher : Pusdiklat BMKG

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Abstract

In the early 2020s, the world was shocked by the coronavirus outbreak (Covid-19) which infected almost alcountries in the world. As the rapid spreading of the virus and its impact on respiratory disorders and itcomplications with other diseases causes the world health organization or WHO declared Covid-19 to be apandemic on March 11. The policies in many countries imposed lockdown or social distancing to preventransmission of this virus which results in limited human activities. However, policies that are not concurrent ineach country and even cities caused the reduction of pollutants will vary. The purpose of this research is to findout the differences density of air pollutants in the atmosphere before and after the Covid-19 in big cities inIndonesia using weather modeling data with Particulate Matter (PM) parameters of less than 10 µm. The resultshowed that the most significant decreased pollutant intensity in the Special Capital Region of Jakarta, the Cityof Bandung, and the City of Semarang. However, the reduction of pollutant density was less significant in the City of Surabaya.
Potential of Ocean Wave Energy in the Northern Waters of Central Java as a Renewable Energy Source Nugroho, Anendha Destantyo
Journal of Geosciences and Environmental Studies Vol. 2 No. 3 (2025): November
Publisher : Indonesian Journal Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53697/ijgaes.v2i3.4973

Abstract

Global efforts to reduce reliance on fossil fuels and greenhouse gas emissions increasingly emphasize the potential of marine energy as a renewable resource. This study analyzes the characteristics of significant wave height and estimates of wave energy and wave power in the northern waters of Central Java, Indonesia, during 2024. ERA5 reanalysis data from the European Centre for Medium-Range Weather Forecasts (ECMWF) were processed using Python to generate monthly maps of wave height and wave energy, daily time series of energy and power, and boxplots of monthly wave-energy distribution. The annual significant wave height ranged from 0.1 to 1.6 m, with the highest values occurring in December and March and the lowest in April and November. Monthly wave energy exceeded 1,200 J m⁻², while daily wave-energy density reached up to 3,000 J m⁻² and daily wave power peaked near 6 kW m⁻¹ during the west monsoon season. The highest variability occurred in March and December, reflecting the influence of monsoonal wind forcing. These findings demonstrate that the northern Central Java Sea has promising, relatively stable wave-energy potential, particularly during the west monsoon. They may contribute to Indonesia’s clean-energy transition, coastal resilience, and small-island electrification, in alignment with Sustainable Development Goals 7 and 13.
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