Skip to main content Accessibility help
×
Home

Variability of Dissolved Inorganic Radiocarbon at a Surface Site in the Northeast Pacific Ocean

  • Ellen R M Druffel (a1), Steven Beaupré (a1), Sheila Griffin (a1) and Jeomshik Hwang (a2)

Abstract

We report radiocarbon measurements of dissolved inorganic carbon (DIC) in surface water samples collected daily during 12 cruises to Station M in the northeast Pacific off central California. Individual surface Δ14C values ranged from 22‰ to 70‰ over 10 yr. Variability of average cruise values is highest during winter likely due to increased mixing. A general decrease of Δ14C values was observed at a rate of about 3‰ per year between 1994 and 2004, about half of that in atmospheric CO2 during this period (Levin and Kromer 2004). The Δ14C results ranged from 2–18‰ during individual cruises and were often significantly larger than the total uncertainty for individual measurements (±3.9‰). This indicates that a single Δ14C result from a surface site is not sufficient to capture the true variability of Δ14C in the surface ocean.

    • Send article to Kindle

      To send this article to your Kindle, first ensure no-reply@cambridge.org is added to your Approved Personal Document E-mail List under your Personal Document Settings on the Manage Your Content and Devices page of your Amazon account. Then enter the ‘name’ part of your Kindle email address below. Find out more about sending to your Kindle. Find out more about sending to your Kindle.

      Note you can select to send to either the @free.kindle.com or @kindle.com variations. ‘@free.kindle.com’ emails are free but can only be sent to your device when it is connected to wi-fi. ‘@kindle.com’ emails can be delivered even when you are not connected to wi-fi, but note that service fees apply.

      Find out more about the Kindle Personal Document Service.

      Variability of Dissolved Inorganic Radiocarbon at a Surface Site in the Northeast Pacific Ocean
      Available formats
      ×

      Send article to Dropbox

      To send this article to your Dropbox account, please select one or more formats and confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your <service> account. Find out more about sending content to Dropbox.

      Variability of Dissolved Inorganic Radiocarbon at a Surface Site in the Northeast Pacific Ocean
      Available formats
      ×

      Send article to Google Drive

      To send this article to your Google Drive account, please select one or more formats and confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your <service> account. Find out more about sending content to Google Drive.

      Variability of Dissolved Inorganic Radiocarbon at a Surface Site in the Northeast Pacific Ocean
      Available formats
      ×

Copyright

Corresponding author

Corresponding author. Email: edruffel@uci.edu.

References

Hide All
Beaupré, S, Druffel, E. 2009. Constraining the propagation of bomb-radiocarbon through the dissolved organic carbon (DOC) pool in the northeast Pacific Ocean. Deep-Sea Research I 56(10):1717–26.
Bradshaw, AL, Brewer, PG, Shafer, DK, Williams, RT. 1981. Measurements of total carbon dioxide and alkalinity by potentiometric titration in the GEOSECS program. Earth and Planetary Science Letters 55(1):99115.
Brewer, P, Bradshaw, A, Williams, R. 1986. Measurements of total carbon dioxide and alkalinity in the North Atlantic Ocean in 1981. In: Trabalka, JR, Reichle, D, editors. The Changing Carbon Cycle: A Global Analysis. New York: Springer-Verlag. p 358–81.
Brown, T, Farwell, G, Grootes, P, Schimidt, F, Stuiver, M. 1993. Intra-annual variability of the radiocarbon content of corals from the Galapagos Islands. Radiocarbon 35(2):245–51.
DOE. 1994. Handbook of Method for the Analysis of the Various Parameters of the Carbon Dioxide System in Seawater. Version 2. Dickson, AG, Goyet, C, editors. ORNL/CDIAC-74.
Druffel, E, Griffin, S. 2008. Daily variability of dissolved inorganic radiocarbon at three sites in the surface ocean. Marine Chemistry 110(3–4):185–9.
Guilderson, T, Schrag, DP, Goddard, E, Kashgarian, M, Wellington, GM, Linsley, BK. 2000. Southwest subtropical Pacific surface water radiocarbon in a high-resolution coral record. Radiocarbon 42(2):249–56.
Key, RM, Quay, PD, Jones, GA, McNichol, AP, von Reden, KF, Schneider, RJ. 1996. WOCE AMS radiocarbon I: Pacific Ocean results (P6, P16 and P17). Radiocarbon 38(3):425518.
Levin, I, Kromer, B. 2004. The tropospheric 14CO2 level in mid-latitudes of the Northern Hemisphere (1959–2003). Radiocarbon 46(3):1261–72.
Masiello, C, Druffel, E, Bauer, J. 1998. Physical influences on dissolved inorganic radiocarbon variability in the California Current. Deep-Sea Research II 45(4–5):617–42.
McDuffee, K, Druffel, E. 2007. Daily variability of dissolved inorganic radiocarbon in Sargasso Sea surface waters. Marine Chemistry 106(3–4):510–5.
McNichol, AP, Jones, G, Hutton, D, Gagnon, A. 1994. The rapid preparation of seawater σCO2 for radiocarbon analysis at the National Ocean Sciences AMS Facility. Radiocarbon 36(2):237–46.
Morimoto, M, Kitagawa, H, Shibata, Y, Kayane, H. 2004. Seasonal radiocarbon variation of surface seawater recorded in a coral from Kikai Island, subtropical northwestern Pacific. Radiocarbon 46(2):643–8.
Southon, J, Santos, G, Druffel-Rodriguez, K, Druffel, E, Trumbore, S, Xu, X, Griffin, S, Ali, S, Mazon, M. 2004. The Keck Carbon Cycle AMS Laboratory, University of California, Irvine: initial operation and a background surprise. Radiocarbon 46(1):4150.
Stuiver, M, Polach, HA. 1977. Discussion: reporting of 14C data. Radiocarbon 19(3):355–63.
Wolter, K. 2007. Multivariate ENSO Index (MEI) [WWW document]. URL: http://www.esrl.noaa.gov/psd/people/klaus.wolter/MEI/.

Metrics

Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed