Climate impacts on multidecadal <i>p</i>CO<sub>2</sub> variability in the North Atlantic: 1948–2009
release_emxuu53t2fcezckdkxzwr6t3q4
by
Melissa L. Breeden, Galen A. McKinley
Abstract
<strong>Abstract.</strong> The North Atlantic is the most intense region of ocean CO<sub>2</sub> uptake in term of units per area. Here, we investigate multidecadal timescale variability of the partial pressure of CO<sub>2</sub> (<i>p</i>CO<sub>2</sub>) that is due to the natural carbon cycle, using a regional model forced with realistic climate and preindustrial atmospheric <i>p</i>CO<sub>2</sub> for 1948–2009. Large-scale patterns of natural <i>p</i>CO<sub>2</sub> variability are primarily associated with basin-averaged sea surface temperature (SST) that, in turn, is composed of two parts: the Atlantic Multidecadal Oscillation (AMO) and a long-term positive SST trend. The North Atlantic Oscillation (NAO) drives a secondary mode of variability. For the primary mode, positive AMO and the SST trend modify <i>p</i>CO<sub>2</sub> with different mechanisms and spatial patterns. Positive AMO is also associated with a significant reduction in dissolved inorganic carbon (DIC) in the subpolar gyre, due primarily to reduced vertical mixing; the net impact of positive AMO is to reduce <i>p</i>CO<sub>2</sub> in the subpolar gyre. Through direct impacts on SST, the net effect of positive AMO is to increase <i>p</i>CO<sub>2</sub> in the subtropical gyre. From 1980 to present, long-term SST warming has amplified AMO impacts on <i>p</i>CO<sub>2</sub>.
In application/xml+jats
format
Archived Files and Locations
application/pdf 4.8 MB
file_ucu6yigj4rghnhdvetxphnkawe
|
pdfs.semanticscholar.org (aggregator) web.archive.org (webarchive) web.archive.org (webarchive) www.biogeosciences.net (web) |
Open Access Publication
In DOAJ
In ISSN ROAD
In Keepers Registry
ISSN-L:
1726-4170
access all versions, variants, and formats of this works (eg, pre-prints)
Crossref Metadata (via API)
Worldcat
SHERPA/RoMEO (journal policies)
wikidata.org
CORE.ac.uk
Semantic Scholar
Google Scholar