Decadal changes in Pacific carbon

Christopher L. Sabine, Richard A. Feely, Frank J Millero, Andrew G. Dickson, Chris Langdon, Sabine Mecking, Dana Greeley

Research output: Contribution to journalArticle

62 Citations (Scopus)

Abstract

This aper uses the extended multiple linear regression (eMLR) technique to investigate changes over the last decade in dissolved inorganic carbon (DIC) inventories on a meridional line (P16 along 152°W) up the central Pacific and on a zonal line (P02 along 30°N) across the North Pacific. Maximum changes in the total DIC concentrations along P02 are 15-20 μmol kg-1 over 10 years, somewhat higher than the ∼1 μmol kg-1 a-1 increase in DIC expected based on the rate of atmospheric CO2 increase. The maximum changes of 15 -20 μmol kg-1 along the P16 line over the 14/15-year time frame fit with the expected magnitude of the anthropogenic signal, but there is a deeper than expected penetration of the signal in the North Pacific compared to the South Pacific. The effect of varying circulation on the total DIC change, based on decadal alterations of the apparent oxygen utilization rate, is estimated to be greater than 10 μmol kg-1 in the North Pacific, accounting for as much as 80% of the total DIC change in that region. The average anthropogenic CO2 inventory increase along 30°N between 1994 and 2004 was 0.43 mol m-2 a-1, with much higher inventories in the western Pacific. Along P16, the average Northern Hemisphere increase was 0.25 mol m-2 a-1 between 1991/1992 and 2006 compared to an average Southern Hemisphere thropogenic CO2 inventory increase between 1991 and 2005 of 0.41 mol m-2 a-1.

Original languageEnglish
Article numberC07021
JournalJournal of Geophysical Research: Oceans
Volume113
Issue number7
DOIs
StatePublished - Jul 8 2008

Fingerprint

dissolved inorganic carbon
Carbon
carbon
Southern Hemisphere
Northern Hemisphere
Linear regression
regression analysis
penetration
Oxygen
oxygen
rate

ASJC Scopus subject areas

  • Geochemistry and Petrology
  • Geophysics
  • Earth and Planetary Sciences (miscellaneous)
  • Space and Planetary Science
  • Atmospheric Science
  • Astronomy and Astrophysics
  • Oceanography

Cite this

Sabine, C. L., Feely, R. A., Millero, F. J., Dickson, A. G., Langdon, C., Mecking, S., & Greeley, D. (2008). Decadal changes in Pacific carbon. Journal of Geophysical Research: Oceans, 113(7), [C07021]. https://doi.org/10.1029/2007JC004577

Decadal changes in Pacific carbon. / Sabine, Christopher L.; Feely, Richard A.; Millero, Frank J; Dickson, Andrew G.; Langdon, Chris; Mecking, Sabine; Greeley, Dana.

In: Journal of Geophysical Research: Oceans, Vol. 113, No. 7, C07021, 08.07.2008.

Research output: Contribution to journalArticle

Sabine, CL, Feely, RA, Millero, FJ, Dickson, AG, Langdon, C, Mecking, S & Greeley, D 2008, 'Decadal changes in Pacific carbon', Journal of Geophysical Research: Oceans, vol. 113, no. 7, C07021. https://doi.org/10.1029/2007JC004577
Sabine CL, Feely RA, Millero FJ, Dickson AG, Langdon C, Mecking S et al. Decadal changes in Pacific carbon. Journal of Geophysical Research: Oceans. 2008 Jul 8;113(7). C07021. https://doi.org/10.1029/2007JC004577
Sabine, Christopher L. ; Feely, Richard A. ; Millero, Frank J ; Dickson, Andrew G. ; Langdon, Chris ; Mecking, Sabine ; Greeley, Dana. / Decadal changes in Pacific carbon. In: Journal of Geophysical Research: Oceans. 2008 ; Vol. 113, No. 7.
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