Impact of Siberian observations on the optimization of surface CO2 flux

Jinwoong Kim, Hyun Mee Kim, Chun Ho Cho, Kyung On Boo, Andrew R. Jacobson, Motoki Sasakawa, Toshinobu Machida, Mikhail Arshinov, Nikolay Fedoseev

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

To investigate the effect of additional CO2 observations in the Siberia region on the Asian and global surface CO2 flux analyses, two experiments using different observation data sets were performed for 2000-2009. One experiment was conducted using a data set that includes additional observations of Siberian tower measurements (Japan-Russia Siberian Tall Tower Inland Observation Network: JR-STATION), and the other experiment was conducted using a data set without the above additional observations. The results show that the global balance of the sources and sinks of surface CO2 fluxes was maintained for both experiments with and without the additional observations. While the magnitude of the optimized surface CO2 flux uptake and flux uncertainty in Siberia decreased from g-1.17 ± 0.93 to g-0.77 ± 0.70 Pg C yrg-1, the magnitude of the optimized surface CO2 flux uptake in the other regions (e.g., Europe) of the Northern Hemisphere (NH) land increased for the experiment with the additional observations, which affect the longitudinal distribution of the total NH sinks. This change was mostly caused by changes in the magnitudes of surface CO2 flux in June and July. The observation impact measured by uncertainty reduction and self-sensitivity tests shows that additional observations provide useful information on the estimated surface CO2 flux. The average uncertainty reduction of the conifer forest of Eurasian boreal (EB) is 29.1 % and the average self-sensitivities at the JR-STATION sites are approximately 60 % larger than those at the towers in North America. It is expected that the Siberian observations play an important role in estimating surface CO2 flux in the NH land (e.g., Siberia and Europe) in the future.

Original languageEnglish
Pages (from-to)2881-2899
Number of pages19
JournalAtmospheric Chemistry and Physics
Volume17
Issue number4
DOIs
Publication statusPublished - 2017 Feb 24

Fingerprint

Northern Hemisphere
experiment
coniferous tree
land
Europe
distribution
North America
effect
test

All Science Journal Classification (ASJC) codes

  • Atmospheric Science

Cite this

Kim, J., Kim, H. M., Cho, C. H., Boo, K. O., Jacobson, A. R., Sasakawa, M., ... Fedoseev, N. (2017). Impact of Siberian observations on the optimization of surface CO2 flux. Atmospheric Chemistry and Physics, 17(4), 2881-2899. https://doi.org/10.5194/acp-17-2881-2017
Kim, Jinwoong ; Kim, Hyun Mee ; Cho, Chun Ho ; Boo, Kyung On ; Jacobson, Andrew R. ; Sasakawa, Motoki ; Machida, Toshinobu ; Arshinov, Mikhail ; Fedoseev, Nikolay. / Impact of Siberian observations on the optimization of surface CO2 flux. In: Atmospheric Chemistry and Physics. 2017 ; Vol. 17, No. 4. pp. 2881-2899.
@article{9fb81aed373c4ba2ae0009f6ce27abf7,
title = "Impact of Siberian observations on the optimization of surface CO2 flux",
abstract = "To investigate the effect of additional CO2 observations in the Siberia region on the Asian and global surface CO2 flux analyses, two experiments using different observation data sets were performed for 2000-2009. One experiment was conducted using a data set that includes additional observations of Siberian tower measurements (Japan-Russia Siberian Tall Tower Inland Observation Network: JR-STATION), and the other experiment was conducted using a data set without the above additional observations. The results show that the global balance of the sources and sinks of surface CO2 fluxes was maintained for both experiments with and without the additional observations. While the magnitude of the optimized surface CO2 flux uptake and flux uncertainty in Siberia decreased from g-1.17 ± 0.93 to g-0.77 ± 0.70 Pg C yrg-1, the magnitude of the optimized surface CO2 flux uptake in the other regions (e.g., Europe) of the Northern Hemisphere (NH) land increased for the experiment with the additional observations, which affect the longitudinal distribution of the total NH sinks. This change was mostly caused by changes in the magnitudes of surface CO2 flux in June and July. The observation impact measured by uncertainty reduction and self-sensitivity tests shows that additional observations provide useful information on the estimated surface CO2 flux. The average uncertainty reduction of the conifer forest of Eurasian boreal (EB) is 29.1 {\%} and the average self-sensitivities at the JR-STATION sites are approximately 60 {\%} larger than those at the towers in North America. It is expected that the Siberian observations play an important role in estimating surface CO2 flux in the NH land (e.g., Siberia and Europe) in the future.",
author = "Jinwoong Kim and Kim, {Hyun Mee} and Cho, {Chun Ho} and Boo, {Kyung On} and Jacobson, {Andrew R.} and Motoki Sasakawa and Toshinobu Machida and Mikhail Arshinov and Nikolay Fedoseev",
year = "2017",
month = "2",
day = "24",
doi = "10.5194/acp-17-2881-2017",
language = "English",
volume = "17",
pages = "2881--2899",
journal = "Atmospheric Chemistry and Physics",
issn = "1680-7316",
publisher = "European Geosciences Union",
number = "4",

}

Kim, J, Kim, HM, Cho, CH, Boo, KO, Jacobson, AR, Sasakawa, M, Machida, T, Arshinov, M & Fedoseev, N 2017, 'Impact of Siberian observations on the optimization of surface CO2 flux', Atmospheric Chemistry and Physics, vol. 17, no. 4, pp. 2881-2899. https://doi.org/10.5194/acp-17-2881-2017

Impact of Siberian observations on the optimization of surface CO2 flux. / Kim, Jinwoong; Kim, Hyun Mee; Cho, Chun Ho; Boo, Kyung On; Jacobson, Andrew R.; Sasakawa, Motoki; Machida, Toshinobu; Arshinov, Mikhail; Fedoseev, Nikolay.

In: Atmospheric Chemistry and Physics, Vol. 17, No. 4, 24.02.2017, p. 2881-2899.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Impact of Siberian observations on the optimization of surface CO2 flux

AU - Kim, Jinwoong

AU - Kim, Hyun Mee

AU - Cho, Chun Ho

AU - Boo, Kyung On

AU - Jacobson, Andrew R.

AU - Sasakawa, Motoki

AU - Machida, Toshinobu

AU - Arshinov, Mikhail

AU - Fedoseev, Nikolay

PY - 2017/2/24

Y1 - 2017/2/24

N2 - To investigate the effect of additional CO2 observations in the Siberia region on the Asian and global surface CO2 flux analyses, two experiments using different observation data sets were performed for 2000-2009. One experiment was conducted using a data set that includes additional observations of Siberian tower measurements (Japan-Russia Siberian Tall Tower Inland Observation Network: JR-STATION), and the other experiment was conducted using a data set without the above additional observations. The results show that the global balance of the sources and sinks of surface CO2 fluxes was maintained for both experiments with and without the additional observations. While the magnitude of the optimized surface CO2 flux uptake and flux uncertainty in Siberia decreased from g-1.17 ± 0.93 to g-0.77 ± 0.70 Pg C yrg-1, the magnitude of the optimized surface CO2 flux uptake in the other regions (e.g., Europe) of the Northern Hemisphere (NH) land increased for the experiment with the additional observations, which affect the longitudinal distribution of the total NH sinks. This change was mostly caused by changes in the magnitudes of surface CO2 flux in June and July. The observation impact measured by uncertainty reduction and self-sensitivity tests shows that additional observations provide useful information on the estimated surface CO2 flux. The average uncertainty reduction of the conifer forest of Eurasian boreal (EB) is 29.1 % and the average self-sensitivities at the JR-STATION sites are approximately 60 % larger than those at the towers in North America. It is expected that the Siberian observations play an important role in estimating surface CO2 flux in the NH land (e.g., Siberia and Europe) in the future.

AB - To investigate the effect of additional CO2 observations in the Siberia region on the Asian and global surface CO2 flux analyses, two experiments using different observation data sets were performed for 2000-2009. One experiment was conducted using a data set that includes additional observations of Siberian tower measurements (Japan-Russia Siberian Tall Tower Inland Observation Network: JR-STATION), and the other experiment was conducted using a data set without the above additional observations. The results show that the global balance of the sources and sinks of surface CO2 fluxes was maintained for both experiments with and without the additional observations. While the magnitude of the optimized surface CO2 flux uptake and flux uncertainty in Siberia decreased from g-1.17 ± 0.93 to g-0.77 ± 0.70 Pg C yrg-1, the magnitude of the optimized surface CO2 flux uptake in the other regions (e.g., Europe) of the Northern Hemisphere (NH) land increased for the experiment with the additional observations, which affect the longitudinal distribution of the total NH sinks. This change was mostly caused by changes in the magnitudes of surface CO2 flux in June and July. The observation impact measured by uncertainty reduction and self-sensitivity tests shows that additional observations provide useful information on the estimated surface CO2 flux. The average uncertainty reduction of the conifer forest of Eurasian boreal (EB) is 29.1 % and the average self-sensitivities at the JR-STATION sites are approximately 60 % larger than those at the towers in North America. It is expected that the Siberian observations play an important role in estimating surface CO2 flux in the NH land (e.g., Siberia and Europe) in the future.

UR - http://www.scopus.com/inward/record.url?scp=85014025535&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85014025535&partnerID=8YFLogxK

U2 - 10.5194/acp-17-2881-2017

DO - 10.5194/acp-17-2881-2017

M3 - Article

AN - SCOPUS:85014025535

VL - 17

SP - 2881

EP - 2899

JO - Atmospheric Chemistry and Physics

JF - Atmospheric Chemistry and Physics

SN - 1680-7316

IS - 4

ER -