Cited by 35Atmospheric and Environmental Gas DynamicsSpectroscopy and Laser ApplicationsMeteorological Phenomena and Simulations

Role of simulated GOSAT total column CO2 observations in surface CO2 flux uncertainty reduction

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Kadygrov, Nikolay, Maksyutov, Shamil, Eguchi, Nawo, Aoki, Tadao, Nakazawa, Takakiyo, Yokota, Tatsuya, Inoue, Gen·2009·Journal of Geophysical Research: Atmospheres

Abstract

We investigated the utility of Greenhouse Gases Observing Satellite (GOSAT) column CO 2 observations in surface CO 2 flux estimation. We addressed two key issues in carbon flux estimation from satellite data: (1) reduction of the CO 2 flux uncertainty and (2) bias in the constrained surface fluxes. Our results showed that GOSAT data with 1.7 ppm precision (monthly mean, land observation only) had the same utility as observational data from the existing surface network. By adding satellite observations with 2.5 ppm single‐shot random error and a bias of 1 ppm, it was possible to reduce the mean regional flux uncertainty by approximately 30%. Unbiased data with 2.5 ppm single‐shot precision (0.8 ppm for the monthly mean) halved the flux uncertainty. The aerosol‐dependent bias in satellite data with 1 ppm mean variance led to significant absolute errors in the surface CO 2 fluxes, highlighting a need for the accurate detection and rejection of biased data.

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Crossref · 10.1029/2008jd011597

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  • Satellite-based measurements are providing a new source of atmospheric trace gas data that can be used to estimate land surface fluxes with inverse modeling frameworks.

    “Satellite-based measurements are providing a new source of atmospheric trace gas data that can be used to estimate land surface fluxes with inverse modeling frameworks 86,87”

    From Climate-smart soils (2016) · cites this paper as [87]

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Authors
Kadygrov, N., Maksyutov, S., Eguchi, N., Aoki, T., Nakazawa, T., Yokota, T., & Inoue, G.
Affiliations
  • National Institute for Environmental Studies (JP)
  • Tohoku University (JP)
  • Research Institute for Humanity and Nature (JP)
Venue
Journal of Geophysical Research: Atmospheres
Published
2009-11-14
Volume
114
Issue
D21
ISSN
0148-0227 (ISSN-L)
OpenAlex
W2028935781
Cited by
35
References
24
Citations by year
2025: 1 · 2023: 1 · 2021: 2 · 2020: 1 · 2019: 1 · 2018: 4 · 2017: 1 · 2016: 5 · 2015: 3 · 2014: 2 · 2013: 5 · 2012: 2
FWCI
2.57
Type
journal article
Language
en
Open access
Locations
Journal of Geophysical Research Atmospheres (publishedVersion)
Topics
  • Physical Sciences › Environmental Science › Global and Planetary Change › Atmospheric and Environmental Gas Dynamics
  • Physical Sciences › Chemistry › Spectroscopy › Spectroscopy and Laser Applications
  • Physical Sciences › Earth and Planetary Sciences › Atmospheric Science › Meteorological Phenomena and Simulations
Keywords
GOSAT, surface CO2 fluxes, flux uncertainty, satellite data assimilation, data quality control, carbon cycle

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