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Hydrological Angular Momentum

Website under construction

Here we provide all auxiliary hydrological angular momentum data produced for the construction of physical-consistent geodetic residuals GAHS. 

GAHS are calculated as residual of the geodetically observed angular momentum 
GAHS = GAM-(AAM+HAM+SLAM). Under the assumption that the sum of model-based AAM, OAM, HAM, and SLAM can be compared to GAM, GAHS provides an estimate of ocean angular momentum independend of ocean models.

Auxiliary HAM for GAHS Combinations

HAMused for GAHSData SpanResolutionComment
ESMGFZ v2.0
ECMWF ERA5‑LISFLOOD
ESMGFZ GAHS RL071960 - 20251 days1960 - 2017
ECMWF‑ERA5 
2018 - 2025
ECMWF‑operational
MERRA2‑ LISFLOODMERRA‑2 GAHS???? - ????1 day-
GRACE/-FO GFZ
TWS
GravIS-3 GAHS GFZ???? - ????1 day-
GRACE/-FO COST‑G
TWS
GravIS‑3 GAHS COST‑G???? - ????1 day-

Contact

Dr. Henryk Dobslaw
Earth System Modelling

Telegrafenberg
Building A20, room 316
14473 Potsdam
tel. +49 331 288-1974

henryk.dobslaw@gfz.de