@inproceedings{da4b16601d864d369687b83c18e47047,
title = "Using enhanced GRACE water storage data to improve drought detection by the U.S. and North American Drought Monitors",
abstract = "NASA's Gravity Recovery and Climate Experiment (GRACE) satellites measure time variations of the Earth's gravity field enabling reliable detection of spatio-temporal variations in total terrestrial water storage (TWS), including groundwater. The U.S. and North American Drought Monitors rely heavily on precipitation indices and do not currently incorporate systematic observations of deep soil moisture and groundwater storage conditions. Thus GRACE has great potential to improve the Drought Monitors by filling this observational gap. GRACE TWS data were assimilating into the Catchment Land Surface Model using an ensemble Kalman smoother enabling spatial and temporal downscaling and vertical decomposition into soil moisture and groundwater components. The Drought Monitors combine several short- and long-term drought indicators expressed in percentiles as a reference to their historical frequency of occurrence. To be consistent, we generated a climatology of estimated soil moisture and ground water based on a 60-year Catchment model simulation, which was used to convert seven years of GRACE assimilated fields into drought indicator percentiles. At this stage we provide a preliminary evaluation of the GRACE assimilated moisture and indicator fields.",
keywords = "Data assimilation, Drought indicators, Drought monitor, GRACE, Terrestrial water storage",
author = "Rasmus Houborg and Matthew Rodell and Jay Lawrimore and Bailing Li and Rolf Reichle and Richard Heim and Matthew Rosencrans and Rich Tinker and Famiglietti, {James S.} and Mark Svoboda and Brian Wardlow and Zaitchik, {Benjamin F.}",
year = "2010",
doi = "10.1109/IGARSS.2010.5654237",
language = "English (US)",
isbn = "9781424495658",
series = "International Geoscience and Remote Sensing Symposium (IGARSS)",
publisher = "Institute of Electrical and Electronics Engineers Inc.",
pages = "710--713",
booktitle = "2010 IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2010",
address = "United States",
note = "2010 30th IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2010 ; Conference date: 25-07-2010 Through 30-07-2010",
}