Bolch, Tobias

Dettmering, Denise

Döll, Petra

Eicker, Annette

Engels, Olga

Foglia, Laura

Gessner, Ursula

Güntner, Andreas

Kusche, Juergen

Künzer, Claudia

Müller Schmied, Hannes

Seitz, Florian

Sneeuw, Nico

Tourian, Mohammad

van Dam, Tonie

Institute of Transport Research:Publications

Geophysical Research AbstractsVol. 20, EGU2018-2176, 2018EGU General Assembly 2018© Author(s) 2017. CC Attribution 4.0 license.The GlobalCDA Project - Understanding the global freshwater system bycombining geodetic and remote sensing information with modelling, usinga calibration/data assimilation approachJuergen Kusche (1), Petra Döll (2), Tobias Bolch (3), Tonie van Dam (4), Denise Dettmering (5), Annette Eicker(6), Olga Engels (1), Laura Foglia (7), Ursula Geßner (8), Andreas Güntner (9), Claudia Künzer (8), HannesMüller Schmied (2), Florian Seitz (5), Nico Sneeuw (10), and Mohammad Tourian (10)(1) Bonn University, Astronomical, Physical and Mathematical Geodesy, Bonn, Germany (kusche@uni-bonn.de), (2)University of Frankfurt, (3) University of Zurich, (4) University of Luxemburg, (5) TU Munich (DGFI-TUM), (6) HafenCityUniversity Hamburg, (7) University of California, Davis, (8) German Aerospace Center - DLR, (9) GFZ Potsdam, (10)University of StuttgartHydrological models aim at understanding and predicting water storage and flux. From a hydrology point ofview, they allow simulating lateral and vertical partitioning of precipitation into surface/subsurface storages,evapotranspiration and runoff, providing a basis for managing water resources and assessing the effects of climatechange and anthropogenic modifications. From a geodesy perspective, they aid in separating time-variable gravityand space-geodetic time series into different contributions. However, current models have problems due to databiases and limitations in process representation, and they fail to reproduce many signals observed, e.g., by GRACEor in GNSS time series.In the GlobalCDA project, several geodetic (GRACE, GRACE-FO, multi-mission river and lakes radar al-timetry, ice altimetry, GNSS time series) and remote sensing (water and snow extent, DEM differencing) will beintegrated with the WaterGAP Global Hydrological Model (WGHM) and in-situ streamflow observations throughensemble data assimilation and Pareto-optimal calibration approaches. As its final result, the project strives atcreating a consistent global reanalysis of terrestrial water storages and fluxes with 50 km resolution, which iscloser to observations than current products. New data products such as surface water volume changes or glaciermass balance will be developed with quality measures. At the same time, GlobalCDA will work towards improvedprocess representation in WaterGAP.GlobalCDA has been selected to be funded by the German Research Foundation (DFG), involving nine in-stitutions and commencing in 2018. The presentation will provide an overview on its research aims and possibleapplications in geodesy and hydrology.

The GlobalCDA Project - Understanding the global freshwater system by combining geodetic and remote sensing information with modelling, using a calibration/data assimilation approach

https://elib.dlr.de/119783/1/EGU2018-2176.pdf

The GlobalCDA Project - Understanding the global freshwater system by combining geodetic and remote sensing information with modelling, using a calibration/data assimilation approach

Abstract

Similar works

Full text

Available Versions

Institute of Transport Research:Publications