NASA MEaSUREs ESESES Project
Water Storage: Level 4 products

References:
http://sopac-csrc.ucsd.edu/wp-content/uploads/2021/08/ESESES-ATBD.pdf (Chapter 9)
Argus, D.F., Landerer, F.W., Wiese, D.N., Martens, H.R., Fu, Y., Famiglietti, J.S., Thomas, B.F., Farr, T.G., Moore, A.W. and Watkins, M.M. (2017), 
Sustained water loss in California’s mountain ranges during severe drought from 2012 to 2015 inferred from GPS, 
Journal of Geophysical Research: Solid Earth, 122. https://urldefense.proofpoint.com/v2/url?u=https-3A__doi.org_10.1002_2017JB014424&d=DwIFaQ&c=-35OiAkTchMrZOngvJPOeA&r=rTSj9RMEB8TwPr0c1AOIEArlHzHG0c--69_MekFEBfQ&m=k5-JYdq_jVhp1f1y2GscItlQG9trS26JnAI3Il2auY4&s=LbBw2UdbRpZhceK4mRhrTws0zz1YCWmDXe9Vvb1tiO4&e= .
Contact: Donald Argus, Jet Propulsion Laboratory (argus@jpl.nasa.gov)

Change in components of water storage are given in seven directories:
 
 water.gps
    change in total water storage inferred from GPS.
    column 1- latitude
    column 2- longitude
    column 3- equivalent water thickness (mm)
    column 4- uncertainty in equivalent water thickness (mm)

 atmosphere
    change in equivalent water thickness*

 snow
    change in snow water equivalent (SMC) in SNODAS**.

 soil
    change in soil moisture in NLDAS-NOAH***.

 reservoir
    change in surface water in artificial reservoirs from CDEC****.

 ________________________

 mass
    change in total mass, equal to water.gps + reservoir + atmosphere

 ground
    change in water in the ground not in hydrology models,
    inferred to be water.gps - snow - soil moisture

 ________________________

Notes:

*change in equivalent water thickness - "atmosphere"
ERA5 is the fifth generation European Centre for Medium-Range Weather Forecasts (ECMWF) reanalysis
for the global climate and weather for the past 4 to 7 decades
https://urldefense.proofpoint.com/v2/url?u=https-3A__cds.climate.copernicus.eu_cdsapp-23-21_dataset_reanalysis-2Dera5-2Dsingle-2Dlevels-2Dmonthly-2Dmeans-3Ftab-3Dform&d=DwIFaQ&c=-35OiAkTchMrZOngvJPOeA&r=rTSj9RMEB8TwPr0c1AOIEArlHzHG0c--69_MekFEBfQ&m=k5-JYdq_jVhp1f1y2GscItlQG9trS26JnAI3Il2auY4&s=W13J6HqoLUKNOazmJ98Vo2hGtBkoL_3IfmAnafJkQdg&e= 

*Change in snow water equivalent (SWE) – “snow”
Snow depth and snow water equivalent (SWE) data are available from NOAA’s National Weather Service's 
National Operational Hydrologic Remote Sensing Center (NOHRSC) SNOw Data Assimilation System (SNODAS). 
https://urldefense.proofpoint.com/v2/url?u=https-3A__nsidc.org_data_g02158&d=DwIFaQ&c=-35OiAkTchMrZOngvJPOeA&r=rTSj9RMEB8TwPr0c1AOIEArlHzHG0c--69_MekFEBfQ&m=k5-JYdq_jVhp1f1y2GscItlQG9trS26JnAI3Il2auY4&s=qkfl9OSpXKZFPru4dsnNA5sqjVx4dUVPx8trU8ZqMFo&e= 

**Change in soil moisture content (SMC) – “soil”
NLDAS_NOAH is a monthly climatology data set contains a series of land surface parameters, including Soil Moisture Content (SMC), 
simulated from the Noah land-surface model (LSM) for Phase 2 of the North American Land Data Assimilation System (NLDAS-2). 
https://urldefense.proofpoint.com/v2/url?u=https-3A__disc.gsfc.nasa.gov_datasets_NLDAS-5FNOAH0125-5FMC-5FV002_summary&d=DwIFaQ&c=-35OiAkTchMrZOngvJPOeA&r=rTSj9RMEB8TwPr0c1AOIEArlHzHG0c--69_MekFEBfQ&m=k5-JYdq_jVhp1f1y2GscItlQG9trS26JnAI3Il2auY4&s=rhbYP-8dpFIDLbA-h7cPh66N5cXznNq4IsRZJ9MwDkQ&e= 
 
***Change in artificial reservoir surface water – “reservoir”
The artificial reservoir volume change data are from the California Data Exchange Center (CDEC).
https://urldefense.proofpoint.com/v2/url?u=https-3A__cdec.water.ca.gov_reservoir.html&d=DwIFaQ&c=-35OiAkTchMrZOngvJPOeA&r=rTSj9RMEB8TwPr0c1AOIEArlHzHG0c--69_MekFEBfQ&m=k5-JYdq_jVhp1f1y2GscItlQG9trS26JnAI3Il2auY4&s=68H-SD06M5hSu8MbOb37k_JXl4RihervZaKXjqVFU_I&e=