Water Equivalent Anomaly (1 month, 2002-17)

Water Equivalent Anomaly (1 month, 2002-17) | NASA

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About this dataset

These maps show how water stored on and in the land changes from month to month. The maps are blue where there is more water than average and red where there is less water. Water accumulates on land in rivers and lakes, as ground water and soil moisture, and as snow and ice. Scientists track water both to understand the water cycle and to monitor the availability of fresh water. The maps show that water levels change throughout the year with the seasons. Changes from year to year may reveal drought or an excess of water.

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January 2017

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1.0 degrees 360 x 180 download
0.5 degrees 720 x 360 download
CSV for Excel older than 2007 download

Get Data

1. Visit PO.DAAC GRACE data site.

2. Click the Data Access tab and select one of the data access links (Choose PO.DAAC drive if you are unsure).

3. Download what you need.

Related Websites

GRACE Tellus (data)

GRACE Fact Sheet

Further Reading

Water Flow in the Amazon

Water Storage Anomalies in Mississippi Basin

The Water Cycle

The Gravity of Water

Swenson, S. C., and Wahr, J. (2006) Post-processing removal of correlated errors in GRACE data. Geophysical Research Letters, 33, L08402.

Wahr, J., Molenaar, M., and Bryan, F. (1998) Time-variability of the Earth's gravity field: Hydrological and oceanic effects and their possible detection using GRACE. Journal of Geophysical Research, 103, 30,205-30,229.


Imagery produced by the NASA Earth Observations team based on GRACE land data processed by Sean Swenson, supported by the NASA MEASURES Program.

Federal Geographic Data Committee Geospatial Metadata

View the FGDC Metatdata for Water Equivalent Anomaly (1 month, 2002-17)

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