Flash Drought as Captured by Reanalysis Data: Disentangling the Contributions of Precipitation Deficit and Excess Evapotranspiration

Koster, R. D.; Schubert, S. D.; Wang, H.; Mahanama, S. P.; DeAngelis, Anthony M.

doi:10.1175/JHM-D-18-0242.1

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Flash Drought as Captured by Reanalysis Data: Disentangling the Contributions of Precipitation Deficit and Excess Evapotranspiration

2019
By Koster, R. D. ; Schubert, S. D. ; Wang, H. ; ...
Source: Journal of Hydrometeorology, 20(6), 1241–1258

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Journal Title:

Journal of Hydrometeorology
Personal Author:

Koster, R. D. ; Schubert, S. D. ; Wang, H. ; Mahanama, S. P. ; DeAngelis, Anthony M.

Koster, R. D. ; Schubert, S. D. ; Wang, H. ; Mahanama, S. P. ; DeAngelis, Anthony M. Less -
NOAA Program & Office:

OAR (Oceanic and Atmospheric Research) ; CPO (Climate Program Office)

OAR (Oceanic and Atmospheric Research) ; CPO (Climate Program Office) Less -
Description:

Flash droughts—uncharacteristically rapid dryings of the land system—are naturally associated with extreme precipitation deficits. Such precipitation deficits, however, do not tell the whole story, for land surface drying can be exacerbated by anomalously high evapotranspiration (ET) rates driven by anomalously high temperatures (e.g., during heat waves), anomalously high incoming radiation (e.g., from reduced cloudiness), and other meteorological anomalies. In this study, the relative contributions of precipitation and ET anomalies to flash drought generation in the Northern Hemisphere are quantified through the analysis of diagnostic fields contained within the MERRA-2 reanalysis product.
Keywords:

[+]

Drought Evapotranspiration Hydrology Intraseasonal Variability Modeling, Analysis, Predictions, And Projections (MAPP) Program Reanalysis Data
Source:

Journal of Hydrometeorology, 20(6), 1241–1258
DOI:

https://doi.org/10.1175/JHM-D-18-0242.1
Document Type:

Journal Article
Funding:

Grant no. NA17OAR4310130
Place as Subject:

North America
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Submitted
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urn:sha256:7fb25f76fa2b1753fb04f378db8414252086ed0ca06c4301215d0d8ec3bc5cd9
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https://repository.library.noaa.gov/view/noaa/36911/noaa_36911_DS1.pdf
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Flash Drought as Captured by Reanalysis Data: Disentangling the Contributions of Precipitation Deficit and Excess Evapotranspiration

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