Published February 24, 2021 | Version 1.0
Dataset Open

Global estimates of drought stress in soils using SMAP

Authors/Creators

  • 1. Water Management and Hydrological Science, Texas A&M University, College Station, TX, USA
  • 2. Department of Crop and Soil Sciences, University of Georgia, Athens, GA, USA
  • 3. Biological and Agricultural Engineering, Texas A&M University, College Station, TX, USA

Description

This resource provides the global estimates of Flash Drought Stress Index (FDSI) from 31st Match 2015 through 19th March 2019 at a daily time-step at 36-km spatial resolution. FDSI non-linearly combines Soil Moisture Stress (SMS, drought stress) and the Relative Rate of Drydown (RRD, drought stress intensification rate). SMS and RRD are developed using SMAP θRS (March 2015-2019) and footprint-scale seasonal soil water retention parameters and land-atmospheric coupling strength. The value of FDSI ranges between (0, 1) with values >0.71 indicates flash drought conditions. For details, the readers are referred to the read.me.pdf. 

Notes

The authors acknowledge the funding support from NASA SMAP projects (NNX16AQ58G, 80NSSC20K1807). We thank the Texas A&M High-Performance Research Computing (https://hprc.tamu.edu/) for providing computing resources for this research.

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read_me.pdf

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Additional details

References

  • Sehgal, V., Gaur, N., & Mohanty, B. P. (2020) "Global Surface Soil Moisture Drydown Patterns." Water Resources Research: 57 (1). doi: 10.1029/2020WR027588
  • Sehgal, V., Gaur, N., & Mohanty, B. P. (2021)" Global Flash Drought Monitoring using Surface Soil Moisture." (Under review) Preprint available at: Earth and Space Science Open Archive