Benefits and pitfalls of GRACE data assimilation: A case study of terrestrial water storage depletion in India

Girotto, Manuela; De Lannoy, Gabriëlle J. M.; Reichle, Rolf H.; Rodell, Matthew; Draper, Clara; Bhanja, Soumendra N.; Mukherjee, Abhijit

doi:10.1002/2017GL072994

Advanced Search

Select up to three search categories and corresponding keywords using the fields to the right. Refer to the Help section for more detailed instructions.

Search our Collections & Repository

Advanced Search
Custom Query

All these words:

For very narrow results

This exact word or phrase:

When looking for a specific result

Any of these words:

Best used for discovery & interchangable words

None of these words:

Recommended to be used in conjunction with other fields

Language:

Dates

Publication Date Range:

to

Document Data

Title:

Document Type:

Library

Collection:

Series:

People

Author:

Clear All

Query Builder

Query box

Clear All

For additional assistance using the Custom Query please check out our Help Page

The NOAA IR serves as an archival repository of NOAA-published products including scientific findings, journal articles, guidelines, recommendations, or other information authored or co-authored by NOAA or funded partners. As a repository, the NOAA IR retains documents in their original published format to ensure public access to scientific information.

i

Benefits and pitfalls of GRACE data assimilation: A case study of terrestrial water storage depletion in India

2017
By Girotto, Manuela ; De Lannoy, Gabriëlle J. M. ; Reichle, Rolf H. ; ...
Source: Geophysical Research Letters 44(9), 4107-4115, 2017

Details Related Documents You May Also Like

Details:

Journal Title:

Geophysical Research Letters
Personal Author:

Girotto, Manuela ; De Lannoy, Gabriëlle J. M. ; Reichle, Rolf H. ; Rodell, Matthew ; Draper, Clara ; ... More +

Girotto, Manuela ; De Lannoy, Gabriëlle J. M. ; Reichle, Rolf H. ; Rodell, Matthew ; Draper, Clara ; Bhanja, Soumendra N. ; Mukherjee, Abhijit Less -
NOAA Program & Office:

OAR (Oceanic and Atmospheric Research) ; ESRL (Earth System Research Laboratory) ; PSL (Physical Sciences Laboratory) ; CIRES (Cooperative Institute for Research in Environmental Sciences)

OAR (Oceanic and Atmospheric Research) ; ESRL (Earth System Research Laboratory) ; PSL (Physical Sciences Laboratory) ; CIRES (Cooperative Institute for Research in Environmental Sciences) Less -
Description:

This study investigates some of the benefits and drawbacks of assimilating terrestrial water storage (TWS) observations from the Gravity Recovery and Climate Experiment (GRACE) into a land surface model over India. GRACE observes TWS depletion associated with anthropogenic groundwater extraction in northwest India. The model, however, does not represent anthropogenic groundwater withdrawals and is not skillful in reproducing the interannual variability of groundwater. Assimilation of GRACE TWS introduces long-term trends and improves the interannual variability in groundwater. But the assimilation also introduces a negative trend in simulated evapotranspiration, whereas in reality evapotranspiration is likely enhanced by irrigation, which is also unmodeled. Moreover, in situ measurements of shallow groundwater show no trend, suggesting that the trends are erroneously introduced by the assimilation into the modeled shallow groundwater, when in reality the groundwater is depleted in deeper aquifers. The results emphasize the importance of representing anthropogenic processes in land surface modeling and data assimilation systems.
Keywords:

[+]

Groundwater Hydrology Mathematical Models
Source:

Geophysical Research Letters 44(9), 4107-4115, 2017
DOI:

https://doi.org/10.1002/2017GL072994
Pubmed Central ID:

PMC5889943
Document Type:

Journal Article
Place as Subject:

India
Rights Information:

Other
Compliance:

PMC
Main Document Checksum:

[+]

urn:sha256:a5af549d589434587d6146f8045ff5dc38e634e0bcb68b3d65b913258d488372
Download URL:

https://repository.library.noaa.gov/view/noaa/25344/noaa_25344_DS1.pdf
File Type:

[PDF-3.61 MB]