Influence of biological carbon export on ocean carbon uptake over the annual cycle across the North Pacific Ocean
Date
2017-01-21Metadata
Show full item recordCitable URI
https://hdl.handle.net/1912/8870As published
https://doi.org/10.1002/2016GB005527DOI
10.1002/2016GB005527Keyword
Carbon cycle; North Pacific; Biological pumpAbstract
We evaluate the influences of biological carbon export, physical circulation, and temperature-driven solubility changes on air-sea CO2 flux across the North Pacific basin (35°N–50°N, 142°E–125°W) throughout the full annual cycle by constructing mixed layer budgets for dissolved inorganic carbon (DIC) and pCO2, determined on 15 container ship transects between Hong Kong and Long Beach, CA, from 2008 to 2012. Annual air-sea CO2 flux is greatest in the western North Pacific and decreases eastward across the basin (2.7 ± 0.9 mol C m−2 yr−1 west of 170°E, as compared to 2.1 ± 0.3 mol C m−2 yr−1 east of 160°W). East of 160°W, DIC removal by annual net community production (NCP) more than fully offsets the DIC increase due to air-sea CO2 flux. However, in the region west of 170°E influenced by deep winter mixing, annual NCP only offsets ~20% of the DIC increase due to air-sea CO2 flux, requiring significant DIC removal by geostrophic advection. Temperature-driven solubility changes have no net influence on pCO2 and account for <25% of annual CO2 uptake. The seasonal timing of NCP strongly affects its influence on air-sea CO2 flux. Biological carbon export from the mixed layer has a stronger influence on pCO2 in summer when mixed layers are shallow, but changes in pCO2 have a stronger influence on air-sea CO2 flux in winter when high wind speeds drive more vigorous gas exchange. Thus, it is necessary to determine the seasonal timing as well as the annual magnitude of NCP to determine its influence on ocean carbon uptake.
Description
Author Posting. © American Geophysical Union, 2017. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Global Biogeochemical Cycles 31 (2017): 81–95, doi:10.1002/2016GB005527.
Collections
Suggested Citation
Global Biogeochemical Cycles 31 (2017): 81–95Related items
Showing items related by title, author, creator and subject.
-
Dissolved inorganic carbon from R/V Thomas G. Thompson and R/V Kilo Moana cruises TN277, KM1301 in the Eastern North Pacific Ocean from 2012-2013 (POWOW project)
Johnson, Zackary I. (Biological and Chemical Oceanography Data Management Office (BCO-DMO). Contact: bco-dmo-data@whoi.edu, 2019-03-05)Dissolved inorganic carbon from R/V Thomas G. Thompson and R/V Kilo Moana cruises TN277, KM1301 in the Eastern North Pacific Ocean from 2012-2013 (POWOW project) For a complete list of measurements, refer to the full ... -
Dissolved trace metal (Mn, Fe, Co, Ni, Cu, Zn, Cd, Pb) concentration data from surface (towfish) samples collected during 2018 EXPORTS North Pacific cruise to the subarctic North Pacific near Ocean Station PAPA (Station P) on R/V Roger Revelle RR1813.
Burns, Shannon M.; Buck, Kristen; Jenkins, Bethany D.; Brzezinski, Mark A. (Biological and Chemical Oceanography Data Management Office (BCO-DMO). Contact: bco-dmo-data@whoi.edu, 2022-03-10)Concentrations of dissolved (<0.2 µm) manganese (Mn), iron (Fe), cobalt (Co), nickel (Ni), copper (Cu), zinc (Zn), cadmium (Cd), lead (Pb) in surface (~2 m) samples collected between 15 August 2018 and 6 September 2018 ... -
High concentrations of marine snow and diatom algal mats in the North Pacific Subtropical Gyre : implications for carbon and nitrogen cycles in the oligotrophic ocean
Pilskaln, Cynthia H.; Villareal, Tracy A.; Dennett, Mark R.; Darkangelo-Wood, C.; Meadows, G. (2005-08-02)A Video Plankton Recorder (VPR) and remotely operated vehicle (ROV) were utilized on three cruises in the oligotrophic North Pacific Subtropical Gyre (NPSG) between 1995 and 2002 to quantify the size and abundance of marine ...