The Efficiency of Data Assimilation

Nearing, Grey; Yatheendradas, Soni; Crow, Wade; Zhan, Xiwu; Liu, Jicheng; Chen, Fan

doi:10.1029/2017WR020991

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The Efficiency of Data Assimilation

2018
By Nearing, Grey ; Yatheendradas, Soni ; Crow, Wade ; ...
Source: Water Resources Research 54(9), 6374-6392, 2018

[PDF-867.65 KB]

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Journal Title:

Water Resources Research
Personal Author:

Nearing, Grey ; Yatheendradas, Soni ; Crow, Wade ; Zhan, Xiwu ; Liu, Jicheng ; ... More +

Nearing, Grey ; Yatheendradas, Soni ; Crow, Wade ; Zhan, Xiwu ; Liu, Jicheng ; Chen, Fan Less -
NOAA Program & Office:

NESDIS (National Environmental Satellite, Data, and Information Service) ; STAR (Center for Satellite Applications and Research)

NESDIS (National Environmental Satellite, Data, and Information Service) ; STAR (Center for Satellite Applications and Research) Less -
Description:

Data assimilation is the application of Bayes' theorem to condition the states of a dynamical systems model on observations. Any real-world application of Bayes' theorem is approximate, and therefore, we cannot expect that data assimilation will preserve all of the information available from models and observations. We outline a framework for measuring information in models, observations, and evaluation data in a way that allows us to quantify information loss during (necessarily imperfect) data assimilation. This facilitates quantitative analysis of trade-offs between improving (usually expensive) remote sensing observing systems versus improving data assimilation design and implementation. We demonstrate this methodology on a previously published application of the ensemble Kalman filter used to assimilate remote sensing soil moisture retrievals from Advanced Microwave Scattering Radiometer for Earth (AMSR-E) into the Noah land surface model.
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Mathematical Models Soil Moisture
Source:

Water Resources Research 54(9), 6374-6392, 2018
DOI:

https://doi.org/10.1029/2017WR020991
Pubmed Central ID:

PMC6295921
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Journal Article
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PMC
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urn:sha256:9ee7e265aa1d26e2a471c18f21bc5936326bfb16165c196ec63e58a793163d23
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https://staging-noaa.cdc.gov/view/noaa/25352/noaa_25352_DS1.pdf
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The Efficiency of Data Assimilation

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