Scaling methods of leakage correction in GRACE mass change estimates revisited for the complex hydro-climatic setting of the Indus Basin

Tripathi, Vasaw; Groh, Andreas; Horwath, Martin; Ramsankaran, Raaj

doi:https://doi.org/10.5194/hess-26-4515-2022

Articles | Volume 26, issue 17

https://doi.org/10.5194/hess-26-4515-2022

© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/hess-26-4515-2022

© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 26, issue 17

Research article

|

12 Sep 2022

Research article |

| 12 Sep 2022

Scaling methods of leakage correction in GRACE mass change estimates revisited for the complex hydro-climatic setting of the Indus Basin

Vasaw Tripathi, Andreas Groh, Martin Horwath, and Raaj Ramsankaran

Supplement

https://doi.org/10.5194/hess-26-4515-2022-supplement

Data sets

GRACE Static Field Geopotential Coefficients JPL Release 6.0 NASA JPL (Jet Propulsion Laboratory) https://doi.org/10.5067/GRGSM-20J06

GRACE Geopotential GSM Coefficients GFZ RL06 (6.0) C. Dahle, F. Flechtner, M. Murböck, G. Michalak, H. Neumayer, O. Abrykosov, A. Reinhold, and R. König https://doi.org/10.5880/GFZ.GRACE_06_GSM

Grace Static Field Geopotential Coefficients Csr Release 6.0 University Of Texas Center For Space Research https://doi.org/10.5067/GRGSM-20C06

High-resolution CSR GRACE RL05 mascons H. Save, S. Bettadpur, and B. D. Tapley http://www2.csr.utexas.edu/grace

ITSG-Grace2018: Overview and Evaluation of a New GRACE-Only Gravity Field Time Series A. Kvas, S. Behzadpour, M. Ellmer, B. Klinger, S. Strasser, N. Zehentner, and T. Mayer-Gürr https://www.tugraz.at/institute/ifg/downloads/gravity-field-models/itsg-grace2018

Short summary

GRACE/GRACE-FO provided global observations of water storage change since 2002. Scaling is a common approach to compensate for the spatial filtering inherent to the results. However, for complex hydrological basins, the compatibility of scaling with the characteristics of regional hydrology has been rarely assessed. We assess traditional scaling approaches and a new scaling approach for the Indus Basin. Our results will help users with regional focus understand implications of scaling choices.