GFZ TELLUS GRACE-FO Level-3 Monthly Ocean Bottom Pressure Anomaly Release 6.1 version 04

Processing Level3
Start/Stop Date2018-May-22 to Present
Short NameTELLUS_GRFO_L3_GFZ_RL06.1_OCN_v04
DescriptionThe monthly ocean bottom pressure anomaly grids are given as equivalent water thickness changes derived from GRACE & GRACE-FO time-variable gravity observations during the specified timespan, and relative to the specified time-mean reference period. The Equivalent water thickness represent sea floor pressure changes due to the integral effect of ocean and atmosphere processes, including global mean ocean bottom pressure changes (mean ocean mass and mean atmosphere mass over the global oceans). The Level-2 GAD product has been added back, a glacial isostatic adjustment (GIA) correction has been applied, and standard corrections for geocenter (degree-1), C20 (degree-20) and C30 (degree-30) are incorporated. Post-processing filters (i.e., de-striping and spatial smoothing) have been applied to reduce correlated errors. Version 04 (v04) of the ocean bottom pressure data uses updated and consistent C20 and Geocenter corrections (i.e., Technical Notes TN-14 and TN-13), as well as an ellipsoidal correction to account for the non-spherical shape of the Earth when mapping gravity anomalies to surface mass change. This RL06.1 is an updated release version of the previous RL06. The difference is only in the Level-1B accelerometer transplant data that is used for the GF2 (GRACE-FO 2) satellite; RL06.1 uses the ACH data product. Data grids are provided in ASCII/netCDF/GeoTIFF formats. For the RL06 version and beyond, all GRACE products in the ASCII format have adopted the YAML encoding header, which is in full compliance with the PODAAC metadata best practices.
ProjectGravity Recovery and Climate Experiment Follow-On (GRACE-FO)
Data ProviderPublisher: PO.DAAC
Creator: Felix Landerer
Release Place: JPL
Release Date: 2023-Feb-21

Keyword(s)TELLUS, GRACE-FO, OBP, LWET, Gravity, GFZ, RL06.1, OCEAN, OCEAN MASS, Sea Level
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Spatial Resolution: 1 Decimal Degrees x 1 Decimal Degrees
Temporal Resolution: Monthly - < Annual
Region: GLOBAL
North Bounding Coordinate: 89.5 degrees
South Bounding Coordinate: -89.5 degrees
West Bounding Coordinate: -180 degrees
East Bounding Coordinate: 180 degrees
Time Span: 2018-May-22 to Present
Granule Time Span: 2018-Jun-01 to 2024-Jan-01
Projection Type: Gridded
Ellipsoid: WGS 84
NameLong NameUnit
lat_boundslatitude boundariesdegrees_north
lon_boundslongitude boundariesdegrees_east
timetimedays since 2002-01-01T00:00:00
time_boundstime bounds for each time value, i.e. the first day and last day included in the monthly solutiondays since 2002-01-01T00:00:00
Citation is critically important for dataset documentation and discovery. Please cite the data as follows, and cite the reference papers when it is appropriate.
Citation Felix Landerer. 2023. GFZ TELLUS GRACE-FO Level-3 Monthly Ocean Bottom Pressure Anomaly Release 6.1 version 04. Ver. RL06.1v04. PO.DAAC, CA, USA. Dataset accessed [YYYY-MM-DD] at

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For more information see Data Citations and Acknowledgments.

Journal Reference Landerer F. W. and S. C. Swenson, Accuracy of scaled GRACE terrestrial water storage estimates. Water Resources Research, Vol 48, W04531, 11 PP, doi:10.1029/2011WR011453, 2012.