A global long-term daily reanalysis of reference evapotranspiration for drought and food-security monitoring

Mike Hobbins; Timen Jansma; Daniel Sarmiento; Amy McNally; Tamuka Magadzire; Harikishan Jayanthi; Will Turner; Andrew Hoell; Greg Husak; Gabriel B. Senay; Olena Boiko; Michael Budde; Pamella Magone; Candida Dewes

doi:10.1038/s41597-023-02648-4

A global long-term daily reanalysis of reference evapotranspiration for drought and food-security monitoring

Nature Scientific Data

By: Mike Hobbins, Timen Jansma, Daniel Sarmiento, Amy McNally, Tamuka Magadzire, Harikishan Jayanthi, Will Turner, Andrew Hoell, Greg Husak, Gabriel B. Senay, Olena Boiko, Michael Budde, Pamella Magone, and Candida Dewes

https://doi.org/10.1038/s41597-023-02648-4

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Abstract

NOAA has developed a global reference evapotranspiration (ET₀) reanalysis using the UN Food and Agriculture Organization formulation (FAO-56) of the Penman-Monteith equation forced by MERRA phase 2 (MERRA2) meteorological and radiative drivers. The NOAA ET₀ reanalysis is provided daily from January 1, 1980 to the near-present at a resolution of 0.5° latitude × 0.625° longitude. The reanalysis is verified against station data across southern Africa, a region presenting both significant challenges regarding hydroclimatic variability and observational quantity and quality and significant potential benefits to food-insecure populations. These data are generated from observations from the Southern African Science Service Centre for Climate Change and Adaptive Land Management (SASSCAL) network. We further verified globally against spatially distributed ET₀ derived from two reanalyses–the Global Data Assimilation System (GDAS) and Princeton Global Forcing (PGF)–and these verifications produced similar results, yet demonstrated wide regional and seasonal differences. We also present cases that verify the operational applicability of the reanalysis in long-established drought, famine, crop- and pastoral-stress metrics, and in predictability assessments of drought forecasts.

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Additional publication details
Publication type	Article
Publication Subtype	Journal Article
Title	A global long-term daily reanalysis of reference evapotranspiration for drought and food-security monitoring
Series title	Nature Scientific Data
DOI	10.1038/s41597-023-02648-4
Volume	10
Year Published	2023
Language	English
Publisher	Springer
Contributing office(s)	Earth Resources Observation and Science (EROS) Center
Description	746, 16 p.
Other Geospatial	Southern Africa
Google Analytic Metrics	Metrics page