WEATHER WATCH


GRACE-Based Root Zone Soil Moisture Drought Indicator April 05, 2021


Wetness percentiles are relative to the period 1948-2012 The root zone is defined as the top 1 meter of soil Cell Resolution 0.25 degrees


Projection of this document is Times (World) https://nasagrace.unl.edu


Scientists at NASA’s Goddard Space Flight Center (GRACE-FO) generate these groundwater and soil moisture drought indicators each week. Tey are based on terrestrial water storage observations derived from GRACE-FO satellite data and integrated with other observations, using a sophisticated numerical model of land surface water and energy processes. Te drought indicators describe current wet or dry conditions, expressed as a percentile showing the probability of occurrence for that particular location and time of year, with lower values (warm colors) meaning dryer than normal, and higher values (blues) meaning wetter than normal. Tese are provided as both images, such as the map above, and binary data files.


Tis information is available on the website https://nasagrace.unl.edu/.


Maps and binary data files are generated showing the Root Zone Soil Moisture Percentile, the Surface Soil Moisture Percentile, and the Groundwater Percentile. Tese are provided for the following areas: Global (as shown above), Contiguous U.S. (CONUS), Africa, Asia, Australia, Europe, North America, and South America. Te Global Land indicators are at 0.25-degree resolution for all areas except CONUS, where indicators are generated at 0.125-degree resolution.


60 TPI Turf News May/June 2021


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