@conference {1277,
	title = {Radiocarbon in the Canada Basin: Carbon Transfer Processes in the Changing Arctic},
	booktitle = {Proceedings from the 2010 AGU Ocean Sciences Meeting},
	year = {2010},
	note = {Date revised - 2010-09-01SuppNotes - Abstracts AvailableLast updated - 2016-12-22},
	month = {February 2010},
	publisher = {American Geophysical Union, 2000 Florida Ave., N.W. Washington DC 20009 USA, [URL:http://www.agu.org]},
	organization = {American Geophysical Union, 2000 Florida Ave., N.W. Washington DC 20009 USA, [URL:http://www.agu.org]},
	abstract = {We are developing full water column depth [delta]14C profiles for dissolved inorganic carbon (DIC), dissolved organic carbon (DOC) and suspended particulate organic carbon (POC) collected in 2008 from the Canada Basin in the Arctic Ocean. These samples provide an opportunity to study the current distribution of radiocarbon in different carbon pools and set a baseline for future investigations of the carbon cycle in this key oceanic region where climate change is anticipated to have a major and imminent impact on carbon storage and cycling. Our first DI14C depth profile from 75, 150 is similar to one taken in 1992 (Jones et al. 1994) in demonstrating a well-ventilated surface layer overlying an older but recently ventilated deeper basin. Significant increases in DI14C, up to 30 ppt, are observed in the mid-depth region between 500 to 1500 m, roughly coincident with a warm layer underlying cold surface waters. The differences that have occurred over 16 years may lend insight to the observed warming of Atlantic water in the Canada Basin over the past decades. We will present the first DO14C profile from the central Canada Basin. Measurements are being made using a UV oxidation system established at NOSAMS. Most of the samples collected for DO14C measurement were acidified to preserve them. Results from frozen duplicates for a few of the samples will be compared to validate the preservation technique. In most regions of the ocean, the shape of DO14C depth profiles parallel those of DI14C profiles but are shifted to significantly older values. This reflects the fact that general oceanographic circulation and remineralization processes dominate the overall profile, but that the sources of carbon to the DOC pool are more complex than those of DIC. It is unknown whether this will be the case in the Arctic Ocean which, while representing only ~1\% of the worlds ocean volume, receives approximately 13\% of the global flux of terrigeneous DOC. Jones, G. A. et al. (1994). NIMS B, 92, 426-430.},
	keywords = {and modeling, Biogeochemical cycles, carbon cycling, processes, Radioactivity and radioisotopes},
	url = {https://search.proquest.com/docview/754883766?accountid=29119},
	author = {McNichol, A P and Xu, L and Griffith, D R and Eglinton, T I and Macdonald, R and McLaughlin, F A}
}
@article {2052,
	title = {Oceanic ventilation and biogeochemical cycling: Understanding the physical mechanisms that produce realistic distributions of tracers and productivity},
	journal = {Global Biogeochemical Cycles},
	volume = {18},
	year = {2004},
	note = {867xpTimes Cited:66
Cited References Count:42
},
	month = {Oct 20},
	abstract = {[1] Differing models of the ocean circulation support different rates of ventilation, which in turn produce different distributions of radiocarbon, oxygen, and export production. We examine these fields within a suite of general circulation models run to examine the sensitivity of the circulation to the parameterization of subgridscale mixing and surface forcing. We find that different models can explain relatively high fractions of the spatial variance in some fields such as radiocarbon, and that newer estimates of the rate of biological cycling are in better agreement with the models than previously published estimates. We consider how different models achieve such agreement and show that they can accomplish this in different ways. For example, models with high vertical diffusion move young surface waters into the Southern Ocean, while models with high winds move more young North Atlantic water into this region. The dependence on parameter values is not simple. Changes in the vertical diffusion coefficient, for example, can produce major changes in advective fluxes. In the coarse-resolution models studied here, lateral diffusion plays a major role in the tracer budget of the deep ocean, a somewhat worrisome fact as it is poorly constrained both observationally and theoretically.},
	keywords = {Biogeochemical cycles, bottom water formation, circulation models, diffusion, particle export, pycnocline, sensitivity, Temperature, vertical exchange, weddell sea, World Ocean},
	isbn = {0886-6236},
	doi = {10.1029/2003GB002097},
	url = {http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2\&amp;SrcAuth=Alerting\&amp;SrcApp=Alerting\&amp;DestApp=WOS\&amp;DestLinkType=FullRecord;UT=WOS:000224876500001},
	author = {Gnanadesikan, A. and Dunne, J. P. and Key, R. M. and Matsumoto, K. and Sarmiento, J. L. and Slater, R. D. and Swathi, P. S.}
}
