Performances of reanalysis products in representing the temperature climatology of Ethiopia

Theoretical and Applied Climatology, Journal Year: 2025, Volume and Issue: 156(1)

Published: Jan. 1, 2025

Language: Английский

---

Consistent Coupled Patterns of Teleconnection Between Rainfall in the Ogooué River Basin and Sea Surface Temperature in Tropical Oceans

Water, Journal Year: 2025, Volume and Issue: 17(5), P. 753 - 753

Published: March 4, 2025

This study investigates teleconnections between rainfall in the Ogooué River Basin (ORB) and sea surface temperature (SST) tropical ocean basins. The Maximum Covariance Analysis (MCA) is used to determine coupled patterns of SST oceans ORB, depicting regions modes dynamics that influence ORB. application MCA fields results three with squared covariance fractions 84.5%, 76.5%, 77.5% for Atlantic, Pacific, Indian basins, respectively. Computation correlations Savitzky–Golay-filtered resulting expansion coefficients reached 0.65, 0.5 0.72, variation identified this can be related Atlantic Meridional Mode El Niño Southern Oscillation Pacific. Over Ocean, it a homogeneous mode over entire basin, instead popular dipole mode. Then, time-dependent correlation method remove any ambiguity on relationships established from MCA.

Language: Английский

---

Evaluating rainfall forecasting capability of multi-source weather (MSWX) product over rainfall regimes of Ethiopia

Geocarto International, Journal Year: 2025, Volume and Issue: 40(1)

Published: March 17, 2025

Language: Английский

---

Evaluating the performances of gridded satellite products in simulating the rainfall characteristics of Abay Basin, Ethiopia

Sustainable Environment, Journal Year: 2024, Volume and Issue: 10(1)

Published: Aug. 2, 2024

Satellite Rainfall Estimates can be an alternative in data-scarce regions like Ethiopia. However, the reliability of estimates need evaluation. In this study, performance Climate Hazard Group Infrared Precipitation with stations version 2.0 (CHIRPS v2.0), Multi-Source Weighted-Ensemble 2.8 (MSWEP v2.8) and Tropical Applications Meteorology using ground-based observations 3.1 (TAMSAT v.3.1) products against observed data were evaluated. Student's t-test analysis at 5% level significance revealed that TAMSAT v3.1 CHIRPS v2.0 have not difference over tropical agro-ecological zone (AEZ), but sub-tropical, temperate, alpine AEZs three rainfall most temporal scales from daily to annual. The detect occurrence tropical, subtropical, temperate AEZs, comparatively they showed low AEZ. MSWEP v2.8 better intensity different class But, sub-tropical AEZ, was preferable classes. On other hand, takes highest degree AEZs. priority total case detecting both equal performance. findings study will play a noteworthy role improve characteristics by best-performing for each AEZ specific scales.

Language: Английский

---

Evaluación del método de análogos para simulación de la precipitación diaria en una región de orografía compleja

Meteorologica, Journal Year: 2024, Volume and Issue: 49, P. 031 - 031

Published: July 1, 2024

Los Modelos Climáticos Globales (GCM) son la principal herramienta disponible para realizar predicciones sobre el clima en escenarios futuros, sin embargo, los mismos presentan un desempeño bajo reproducir local debido a su resolución espacial limitada. Esta característica se acentúa regiones de orografía compleja. En presente trabajo, exploró posibilidad añadir valor agregado al modelado precipitación diaria través método estadístico reducción escala (downscaling) región Andes Centrales. Se utilizó 83 estaciones durante periodo 1981-2015 calibrar análogos utilizando reanálisis ERA-Interim. Las series construidas partir modelos downscaling mostraron resultados más fidedignos comparación con datos crudos del reanálisis, especialmente cálculo valores medios y estadísticos diaria. líneas generales, basados información predictores atmosféricos locales obtuvieron mejor que constituidos gran simplificada base análisis componentes principales. El lo largo dominio no fue uniforme, obteniéndose mejores las chilenas sector sur. Esto posiblemente forzante sinóptico dominante es bien capturado por downscaling. distintos aspectos temporales variabilidad (intraanual, interanual tendencias plazo) fueron hábilmente reproducidos estadísticos.

---