Changes in anthropogenic carbon storage in the Northeast Pacific in the last decade
Date
2016-07-02Author
Chu, Sophie N.
Concept link
Wang, Zhaohui Aleck
Concept link
Doney, Scott C.
Concept link
Lawson, Gareth L.
Concept link
Hoering, Katherine A.
Concept link
Metadata
Show full item recordCitable URI
https://hdl.handle.net/1912/8474As published
https://doi.org/10.1002/2016JC011775DOI
10.1002/2016JC011775Keyword
Carbon dioxide; Dissolved inorganic carbon; Anthropogenic carbon; Carbonate chemistry; Ocean acidification; Northeast PacificAbstract
In order to understand the ocean's role as a sink for anthropogenic carbon dioxide (CO2), it is important to quantify changes in the amount of anthropogenic CO2 stored in the ocean interior over time. From August to September 2012, an ocean acidification cruise was conducted along a portion of the P17N transect (50°N 150°W to 33.5°N 135°W) in the Northeast Pacific. These measurements are compared with data from the previous occupation of this transect in 2001 to estimate the change in the anthropogenic CO2 inventory in the Northeast Pacific using an extended multiple linear regression (eMLR) approach. Maximum increases in the surface waters were 11 µmol kg−1 over 11 years near 50°N. Here, the penetration depth of anthropogenic CO2 only reached ∼300 m depth, whereas at 33.5°N, penetration depth reached ∼600 m. The average increase of the depth-integrated anthropogenic carbon inventory was 0.41 ± 0.12 mol m−2 yr−1 across the transect. Lower values down to 0.20 mol m−2 yr−1 were observed in the northern part of the transect near 50°N and increased up to 0.55 mol m−2 yr−1 toward 33.5°N. This increase in anthropogenic carbon in the upper ocean resulted in an average pH decrease of 0.002 ± 0.0003 pH units yr−1 and a 1.8 ± 0.4 m yr−1 shoaling rate of the aragonite saturation horizon. An average increase in apparent oxygen utilization of 13.4 ± 15.5 µmol kg−1 centered on isopycnal surface 26.6 kg m−3 from 2001 to 2012 was also observed.
Description
Author Posting. © American Geophysical Union, 2016. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Journal of Geophysical Research: Oceans 121 (2016): 4618–4632, doi:10.1002/2016JC011775.
Collections
Suggested Citation
Journal of Geophysical Research: Oceans 121 (2016): 4618–4632Related items
Showing items related by title, author, creator and subject.
-
Pacific anthropogenic carbon between 1991 and 2017
Carter, Brendan; Feely, Richard A.; Wanninkhof, Rik; Kouketsu, Shinya; Sonnerup, Rolf E.; Pardo, Paula Conde; Sabine, Christopher L.; Johnson, Gregory C.; Sloyan, Bernadette M.; Murata, Akihiko; Mecking, Sabine; Tilbrook, Bronte; Speer, Kevin G.; Talley, Lynne D.; Millero, Frank J.; Wijffels, Susan E.; Macdonald, Alison M.; Gruber, Nicolas; Bullister, John L. (American Geophysical Union, 2019-04-29)We estimate anthropogenic carbon (Canth) accumulation rates in the Pacific Ocean between 1991 and 2017 from 14 hydrographic sections that have been occupied two to four times over the past few decades, with most sections ... -
Particulate and dissolved organic carbon and nitrogen data from multiple cruises on R/V Wecoma, R/V Atlantis, and R/V New Horizon in the Northeast Pacific from 1997-2004 (GLOBEC NEP)
Wheeler, Patricia (Biological and Chemical Oceanography Data Management Office (BCO-DMO). Contact: bco-dmo-data@whoi.edu, 2019-02-01)This dataset contains particulate and dissolved organic carbon and nitrogen data from the GLOBEC Northeast Pacific (NEP) Long-Term Observation Program (LTOP) cruises from 1997 to 2004. The nutrient and extracted chlorophyll ... -
High-resolution spatial and temporal measurements of particulate organic carbon flux using thorium-234 in the northeast Pacific Ocean during the EXport processes in the ocean from RemoTe sensing field campaign
Buesseler, Ken O.; Benitez-Nelson, Claudia R.; Roca-Martí, Montserrat; Wyatt, Abigale M.; Resplandy, Laure; Clevenger, Samantha J.; Drysdale, Jessica A.; Estapa, Margaret L.; Pike, Steven M.; Umhau, Blaire P. (University of California Press, 2020-12-10)The EXport Processes in the Ocean from RemoTe Sensing (EXPORTS) program of National Aeronautics and Space Administration focuses on linking remotely sensed properties from satellites to the mechanisms that control the ...