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Dynamical delimitation of the Central American Dry Corridor (CADC) using drought indices and aridity values

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Dynamical delimitation of the Central America Dry Corridor (CADC) using drought indices and aridity values.pdf (1.478Mb)
Date
2019
Author
Quesada Hernández, Luis Eduardo
Calvo Solano, Oscar David
Hidalgo León, Hugo G.
Pérez Briceño, Paula M.
Alfaro Martínez, Eric J.
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Abstract
The Central American Dry Corridor (CADC) is a sub-region in the isthmus that is relatively drier than the rest of the territory. Traditional delineations of the CADC’s boundaries start at the Pacific coast of southern Mexico, stretching south through Central America’s Pacific coast down to northwestern Costa Rica (Guanacaste province). Using drought indices (Standardized Precipitation Index, Modified Rainfall Anomaly Index, Palmer Drought Severity Index, Palmer Hydrological Drought Index, Palmer Drought Z-Index and the Reconnaissance Drought Index) along with a definition of aridity as the ratio of potential evapotranspiration (representing demand of water from the atmosphere) over precipitation (representing the supply of water), we proposed a CADC delineation that changes for normal, dry and wet years. The identification of areas that change their classification during extremely dry conditions is important because these areas may indicate the ocation of future expansion of aridity associated with climate change. In the same way, the delineation of the CADC during wet extremes allows the identification of locations that remain part of the CADC even during the wettest years and that may require special attention from the authorities.
URI
http://hdl.handle.net/10669/79912
External link to the item
10.1177/0309133319860224
https://journals.sagepub.com/doi/10.1177/0309133319860224
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