Nurlatifah, Amalia
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VOL. 17 NO. 1 DESEMBER 2019 Nurlatifah, Amalia
Jurnal Sains Dirgantara Vol 17, No 1 (2020): Vol. 17 No. 1 Desember 2019
Publisher : Lembaga Penerbangan dan Antariksa Nasional

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (7013.226 KB) | DOI: 10.30536/j.jsd.2020.v17.a3340

Abstract

Trend of Halmahera Eddy and Mindanao Eddy Martono, Martono; Santoso, Heru; Nurlatifah, Amalia; Felix, Mark Jayson
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 29, No 2 (2024): Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/ik.ijms.29.2.261-272

Abstract

Global warming, due to increasing greenhouse gases, has increased the frequency of El Niño Southern Oscillation events and influenced ocean dynamics. This research determined the trends of Mindanao Eddy’s and Halmahera Eddy’s over 28 years (1993–2020). The data used in this research consist of sea surface currents, surface wind, sea surface height, and NIŇO3.4 index. Determination of eddy currents was done using the Automated Eddies Detection method. The results showed that the Asian-Australian monsoon and El Niño Southern Oscillation events influence the characteristics of the Mindanao Eddy and Halmahera Eddy. During the Asian monsoon, the position of the Mindanao Eddy and Halmahera Eddy shifts southward, while during the Australian monsoon, it shifts northward. During El Niño, the position of the Mindanao Eddy turns eastward with a smaller diameter, but the position of the Halmahera Eddy does not shift. Conversely, during La Niña, the position of the Halmahera Eddy turns northwestward with a smaller diameter, while the position of the Mindanao Eddy remains unchanged. The shift of the Mindanao Eddy during the El Niño event is closely related to the weakening of the North Equatorial Current and the strengthening of the North Equatorial Countercurrent. On the other hand, the shift of the Halmahera Eddy during the La Niña event is related to the strengthening of the South Equatorial Current as a source of water masses for the New Guinea Coastal Current. The velocity of the Mindanao Eddy and Halmahera Eddy experienced an increasing trend in 1993-2020.
TRACING THE SOURCES AND TRANSPORT PATHWAYS OF PARTICULATE IN JAKARTA USING THE WRF-HYSPLIT MODEL DURING THE JULY 2023 POLLUTION EPISODE Batubara, Ririn Anggina; Pratama, Alvin; Nurlatifah, Amalia
Jurnal Reka Lingkungan Vol 14, No 1 (2026)
Publisher : Institut Teknologi Nasional, Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26760/rekalingkungan.v14i1.13-26

Abstract

PM2.5 pollution remains a critical environmental and public health issue in Jakarta, particularly during the dry season when unfavorable meteorological conditions enhance pollutant accumulation. This study examines the sources and transport pathways of PM2.5 during a severe pollution episode in July 2023, utilizing a combined Weather Research and Forecasting (WRF) and Hybrid Single-Particle Lagrangian Integrated Trajectory (HYSPLIT) modeling approach. Meteorological simulations were evaluated against surface observations, while backward trajectory analyses were conducted using multiple meteorological datasets to assess the consistency of transport. The results indicate that PM2.5 transport into Jakarta was predominantly influenced by air masses originating from the east and southeast, associated with industrial activities, power plants, and local fire events in surrounding regions. The presence of the southeast monsoon contributed to reduced atmospheric dispersion, resulting in prolonged pollutant residence times over the urban area. Despite some limitations in wind speed simulation, the WRF model adequately represented key meteorological parameters relevant to trajectory analysis. These findings highlight that Jakarta’s air pollution is driven by the combined effects of local emissions and regional transport processes, emphasizing the need for integrated air quality management strategies that extend beyond administrative boundaries.