Spatiotemporal analysis of meteorological drought in El Niño years over Oromia region, Ethiopia

Authors

  • GEZAHEGN MERGIA Ethiopian Meteorology Institute, Eastern and Central Oromia Meteorological Service Centre , Arba Minch University, Water Technology Institute, Faculty of Meteorology and Hydrology, Ethiopia

DOI:

https://doi.org/10.54386/jam.v26i1.2329

Keywords:

Meteorological drought, Standardized Precipitation Index, El nino, Strong El nino, Moderate El nino

Abstract

Drought is one of the most common natural disasters globally, having major impacts on environmental, economic, and social conditions and Ethiopia is no exception particularly the Oromia region. In order to evaluate and characterize the meteorological droughts associated with El Niño years over the Oromia region, the satellite data CHIRPS was used. The monthly time series data for the period from 1991 to 2020 was used for temporal and spatial analysis of meteorological drought using standardized precipitation index (SPI) across SPI3, SPI6, SPI9 and SPI12 indices using GeoCLIM, GIS, and Python tools. The results of this study show that meteorological droughts during the El Niño years indicated an increment across weak, moderate, and strong El Niño events over the Oromia region. The dryness was visualized with frequency and duration in time-scale across short-term drought indices in time steps. The time-scale temporal meteorological drought indices in three to twelve months show that the drought indices varied in magnitude, duration, and frequency in meteorological droughts. In general, the meteorological drought severity of correlation for the remaining zones analysis between SPI3 and SPI6, SPI6 and SPI12, and SPI9 and SPI12 indices was dominated by an increment of the correlation values over short to long timescales over the study area.

References

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Published

01-03-2024

How to Cite

MERGIA, G. (2024). Spatiotemporal analysis of meteorological drought in El Niño years over Oromia region, Ethiopia . Journal of Agrometeorology, 26(1), 109–114. https://doi.org/10.54386/jam.v26i1.2329

Issue

Vol. 26 No. 1 (2024): March

Section

Research Paper

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