Bias-corrected high-resolution precipitation datasets assessment over a tropical mountainous region in Colombia: A case of study in Upper Cauca River Basin

Romero-Hernández, Clara Marcela; Avila-Diaz, Alvaro; Quesada, Benjamin; Medeiros, Felipe; Cerón, Wilmar L.; Guzman-Escalante, Juan; Ocampo-Marulanda, Camilo; Rodrigues Torres, Roger; Zuluaga, Cristian Felipe

doi:10.1016/j.jsames.2024.104898

Journal of South American Earth Sciences

2024

DOI: 10.1016/j.jsames.2024.104898

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Bias-corrected high-resolution precipitation datasets assessment over a tropical mountainous region in Colombia: A case of study in Upper Cauca River Basin

Clara Marcela Romero-Hernández,

Alvaro Avila-Diaz,

Benjamin Quesada

et al.

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Historical and future extreme climate events in highly vulnerable small Caribbean Islands

Esteban-Cantillo,

Clerici,

Avila-Diaz

et al. 2024

Clim Dyn

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Small Caribbean islands are on the frontline of climate change because of sea level rise, extreme rainfall and temperature events, and heavy hurricanes. The Archipelago of San Andrés, Providencia, and Santa Catalina (SAI), are Caribbean islands belonging to Colombia and declared a Biosphere Reserve by UNESCO. SAI is highly vulnerable to climate change impacts but no hydroclimatological study quantified the extreme climatic changes yet. This study analyzes historical (1960s-2020, 7 stations) and future (2071–2100, CMIP6 multi-model ensemble, for four scenarios: SSP1-2.6, SSP2-4.5, SSP3-7.0, and SSP5-8.5) trends in mean and extreme precipitation and temperature duration, frequency, and intensity. We find that heatwaves have more than tripled in frequency and doubled their maximum duration since the end of the ‘80 s. Precipitation is historically reduced by 5%, with a reduction recorded in 5 stations and an increase in 2, while extreme rainfall events significantly increased in frequency and intensity in most stations. The hotter-and-drier climate is amplified in the future for all scenarios, with much drier extremes (e.g., -0.5─-17% wet days, +8%─30% consecutive dry days, and +60%─89% in hot days). Although we show that hurricanes Categories IV and V near SAI (< 600 km) more than doubled since the’60 s, only a small fraction of extreme rainfall in the archipelago is associated with hurricanes or tropical storms. La Niña events also have no substantial influence on extreme precipitation. Interestingly, opposite and heterogeneous historical extreme rainfall trends are found across such small territory (< 30 km2). Thus, downscaled hydrometeorological data and model simulations are essential to investigate future extreme climatic events and strengthen small Caribbean islands' climate change adaptation efforts.

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Historical and future extreme climate events in highly vulnerable small Caribbean Islands

Esteban-Cantillo,

Clerici,

Avila-Diaz

et al. 2024

Clim Dyn

View full text Add to dashboard Cite

show abstract

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Bias-corrected high-resolution precipitation datasets assessment over a tropical mountainous region in Colombia: A case of study in Upper Cauca River Basin

Cited by 1 publication

References 71 publications

Historical and future extreme climate events in highly vulnerable small Caribbean Islands

Historical and future extreme climate events in highly vulnerable small Caribbean Islands

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