Influence of biological carbon export on ocean carbon uptake over the annual cycle across the North Pacific Ocean
MetadataShow full item record
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.
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.
Suggested CitationArticle: Palevsky, Hilary I., Quay, Paul D., "Influence of biological carbon export on ocean carbon uptake over the annual cycle across the North Pacific Ocean", Global Biogeochemical Cycles 31 (2017): 81–95, DOI:10.1002/2016GB005527, https://hdl.handle.net/1912/8870
Showing items related by title, author, creator and subject.
Nutrients, pigments, silicate and experimental data collected aboard the OCEANUS during cruise OC1504A in the North Pacific Ocean from 2015-04-19 to 2015-05-06 Brzezinski, Mark; Thamatrakoln, Kimberlee (Biological and Chemical Oceanography Data Management Office (BCO-DMO). Contact: firstname.lastname@example.org, 2018-09-07)These data include nutrient, pigment, silica and experimental data collected aboard the OCEANUS during cruise OC1504A in the North Pacific Ocean along the California Coast from 2015-04-19 to 2015-05-06. The water samples ...
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 ...
Data from: Sommer SA, Van Woudenberg L, Lenz PH, Cepeda G, Goetze E (in review) Vertical gradients in species richness and community composition across the twilight zone in the North Pacific Subtropical Gyre Goetze, Erica (Biological and Chemical Oceanography Data Management Office (BCO-DMO). Contact: email@example.com, 2017-06-12)This dataset consists of metabarcoding data for the zooplankton community in the epipelagic, mesopelagic and upper bathypelagic zones (0-1500m) of the North Pacific Subtropical Gyre. The goal of this study was to assess ...