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Caribbean Evaporative Demand Drought Index

posted on 2023-09-28, 13:00 authored by Craig RamseyerCraig Ramseyer

ERA5-Land derived pentad evaporative demand drought index (EDDI) for the Caribbean from 1981-2021. EDDI is calculated following Hobbins et al. 2016 and the underlying input data are acquired from ERA5-Land (Muñoz-Sabater 2021). This version of EDDI calculates hourly ASCE reference evapotranspiration for a short reference surface following Allen et al. 2005. Leap days have been removed.

This dataset was produced by first creating hourly reference evapotranspiration for a short reference crop for every grid point in the study domain following the equations laid out in Allen et al. 2005.

Allen, R. G., I. A. Walter, R. L. Elliott, T. A. Howell, D. Itenfisu, M. E. Jensen, and R. L. Snyder, eds., 2005: The ASCE Standardized Reference Evapotranspiration Equation. American Society of Civil Engineers. 

EDDI was calculated using 5-day (e.g. pentad) accumulated reference ET following Hobbins et al. 2016.

Hobbins, M. T., Wood, A., McEvoy, D. J., Huntington, J. L., Morton, C., Anderson, M., & Hain, C. (2016). The Evaporative Demand Drought Index. Part I: Linking Drought Evolution to Variations in Evaporative Demand, Journal of Hydrometeorology, 17(6), 1745-1761. 

For more information regarding the hourly ERA5-Land inputs to the reference ET equations, please see Munoz-Sabater et al. 2021.

J. Muñoz-Sabater, Dutra, E., Agustí-Panareda, A., Albergel, C., Arduini, G., Balsamo, G., Boussetta, S., Choulga, M., Harrigan, S., Hersbach, H., Martens, B., Miralles, D. G., Piles, M., Rodríguez-Fernández, N. J., Zsoter, E., Buontempo, C., and Thépaut, J.-N.: ERA5-Land: A state-of-the-art global reanalysis dataset for land applications, Earth Syst. Sci. Data,13, 4349–4383, 2021.


Understanding the Mechanisms Leading to Early Warning of Meteorological and Hydrological Drought in the U.S. Caribbean

National Oceanic and Atmospheric Administration

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Craig Ramseyer

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Files/Folders in Dataset and Description Contains pentad EDDI derived from hourly reference ET using a short crop reference surface. Marine grid points are tagged as NaN.