Skip to main content
×
×
Home

Carbon Isotope Measurements of Surface Seawater from a Time-Series Site Off Southern California

  • Elise N Hinger (a1), Guaciara M Santos (a1), Ellen R M Druffel (a1) and Sheila Griffin (a1)
Abstract

We report carbon isotope abundances of dissolved inorganic carbon (DIC) in surface seawater collected from a time-series site off the Newport Beach Pier in Orange County, California. These data represent the first time series of Δ14C data for a coastal southern California site. From a suite of samples collected daily from 16 October to 11 November 2004, Δ14C values averaged 32.1 ± 4.4‰. Freshwater input from the Santa Ana River to our site caused Δ14C and δ13C values to decrease. Since this initial set of measurements, a time-series site has been maintained from November 2004 to the present. Surface seawater has been collected bimonthly and analyzed for Δ14C, δ13C, salinity, and ΣCO2 concentrations. Water samples from the Santa Ana River were collected during the wet season. California sea mussels and barnacle shells, ranging from 4 to 6 months old, were also collected and analyzed. Results from May 2005 to January 2008 show no long-term changes in δ13C DIC values. Δ14C DIC values over the 2005–2006 period averaged 33.7‰; high Δ14C values were observed sporadically (every 6–7 months), suggesting the presence of open water eddies at our site. Finally, in 2007, a stronger upwelling signal was apparent as indicated by correlations between Δ14C, salinity, and the Bakun index, suggesting that the Δ14C record is an indicator of upwelling in the Southern California Bight.

    • 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.

      Carbon Isotope Measurements of Surface Seawater from a Time-Series Site Off Southern California
      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.

      Carbon Isotope Measurements of Surface Seawater from a Time-Series Site Off Southern California
      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.

      Carbon Isotope Measurements of Surface Seawater from a Time-Series Site Off Southern California
      Available formats
      ×
Copyright
Corresponding author
Corresponding author. Email: elisehinger@gmail.com.
References
Hide All
Bakun, A. 1973. Coastal upwelling indices, west coast of North America, 1946–71. US Department of Commerce, NOAA Technical Report, NMFS SSRF-671.
Beaupré, SR. 2007. Dissolved organic carbon concentrations and isotope ratios in the northeast Pacific Ocean [PhD dissertation]. Earth System Science Department, University of California, Irvine. 142 p.
Bray, NA, Keyes, A, Morawitz, WML. 1991. The California Current system in the Southern California Bight and the Santa Barbara Channel. Journal of Geophysical Research 104(C4):7695–714.
Coe, WR, Fox, DL. 1942. Biology of the California sea-mussel (Mytilus Californianus). I. Influence of temperature, food supply, sex and age on the rate of growth. Journal of Experimental Zoology 90(1):130.
DiGiacomo, PM, Holt, B. 2001. Satellite observations of small coastal ocean eddies in the Southern California Bight. Journal Geophysical Research 106(C10):22,521–43.
Druffel, ERM, Williams, PM. 1991. Radiocarbon in seawater and organisms from the Pacific coast of Baja California. Radiocarbon 33(3):291–6.
Goericke, R, Venrick, E, Koslow, T, Sydeman, WJ, Schwing, FB, Bograd, SJ, Peterson, WT, Emmett, R, Rubén, LLJ, Castro, GG, Valdez, JG, Hyrenbach, KD, Bradley, RW, Weise, MJ, Harvey, JT, Collins, C, Lo, NCH. 2007. The state of the California Current, 2006–2007: regional and local processes dominate. California Cooperative Oceanic Fisheries Investigations Report 48:3366.
Gucinski, HRT, Lackey, RT, Spence, BC. 1990. Global climate change: policy implications for fisheries. Fisheries 15(6):33–8.
Guilderson, T, Roark, EB, Quay, PD, Flood Page, SR, Moy, C. 2006. Seawater radiocarbon evolution in the Gulf of Alaska: 2002 observations. Radiocarbon 48(1):115.
Hutchings, L, Pitcher, GC, Probyn, TA, Bailey, GW. 1995. The chemical and biological consequences of coastal upwelling. In: Summerhayes, CP, Emeis, KC, Angel, MV, Smith, RL, Zeitzschel, B, editors. Upwelling in the Ocean: Modern Processes and Ancient Records. Environmental Science Research Report ES 18. New York: Wiley. p 6583.
Key, RM, Quay, PD, Jones, GA, Schneider, RJ, McNichol, AP, von Reden, K, Schneider, RJ. 1996. WOCE AMS radiocarbon I: Pacific Ocean results (P6, P16, and P17). Radiocarbon 38(3):425518.
Killingley, JS, Berger, WH. 1979. Stable isotopes in a mollusk shell: detection of upwelling events. Science 205(4402):186–8.
Kroopnick, P, Deuser, WG, Craig, H. 1970. Carbon 13 measurements on dissolved inorganic carbon at the North Pacific (1969) Geosecs Station. Journal Geophysical Research 75(36):7668–71.
McGowan, JA, Cayan, DR, Dorman, LM. 1998. Climate-ocean variability and ecosystem response in the Northeast Pacific. Science 281(5374):210–7.
Masiello, CA, Druffel, ERM, Bauer, JE. 1998. Physical controls on dissolved inorganic radiocarbon variability in the California Current. Deep-Sea Research II 45(4–5):617–42.
McNaught, AD, Wilkinson, A. 1997. Compendium of Chemical Terminology. 2nd edition. Oxford: Blackwell Scientific.
McNichol, AP, Jones, GA. 1991. Measuring 14C in seawater ΣCO2 by accelerator mass spectrometry, WHP operations and methods. In: Joyce, T, Corry, C, Stalcup, M, editors. WOCE Operations and Methods Manual. Woods Hole, Massachusetts: WHPO Publication 90–1:71.
McNichol, AP, Jones, GA, Hutton, DL, Gagnon, AR. 1994. The rapid preparation of seawater ΣCO2 for radiocarbon analysis at the National Ocean Sciences AMS Facility. Radiocarbon 36(2):237–46.
Östlund, HG, Stuiver, M. 1980. GEOSECS Pacific radiocarbon. Radiocarbon 22(1):2553.
Panel on the Southern California Bight of the Committee on a Systems Assessment of Marine Environmental Monitoring (PSCB). 1990. Monitoring Southern California's Coastal Waters. National Research Council (U.S.): Commission on Engineering and Technical Systems. Washington, DC: National Academy Press, Marine Board.
Peterson, B, Emmett, R, Goerlicke, R, Venrick, E, Mantyla, A, Bogard, S, Schwing, F, Ralston, S, Forney, K, Hewitt, R, Lo, N, Watson, W, Barlow, J, Lowry, M, Lavaniegos, BE, Chavez, F, Sydeman, WJ, Hyrenbach, D, Bradley, RW, Warzybok, P, Hunter, K, Benson, S, Weise, M, Harvey, JT. 2006. The state of the California Current, 2005–2006: Warm in the north, cool in the south. California Cooperative Oceanographic Fisheries Investigation Data Report 47:3075.
Pickett, MH, Schwing, FB. 2006. Evaluating upwelling estimates off the west coasts of North and South America. Fisheries Oceanography 15(3): 256–9.
Robinson, SW. 1981. Natural and man-made radiocarbon as a tracer for coastal upwelling processes. In: Richards, FA, editor. Coastal Upwelling. Washington, DC: American Geophysical Union. p 298302.
Roemmich, D, McGowan, J. 1995. Climatic warming and the decline of zooplankton in the California Current. Science 267(5202):1324–6.
Santos, GM, Southon, JR, Druffel-Rodriguez, KC, Griffin, S, Mazon, M. 2004. Magnesium perchlorate as an alternative water trap in AMS graphite sample preparation: a report on sample preparation at the KCCAMS Facility at the University of California, Irvine. Radiocarbon 46(1):165–73.
Santos, GM, Moore, RB, Southon, JR, Griffin, S, Hinger, E, Zhang, D. 2007. AMS 14C sample preparation at the KCCAMS/UCI Facility: status report and performance of small samples. Radiocarbon 49(2):255–69.
Schwing, FB, O'Farrell, M, Steger, JM, Baltz, KA. 1996. Coastal upwelling indices, west coast of North America, 1946–95. US Department of Commerce. NOAA-TM-NMFS-SWFSC-231. p 132.
Scott, ME, Boaretto, E, Bryant, C, Cook, GT, Gulliksen, S, Harkness, DD, Heinemeier, J, McGee, E, Naysmith, P, Possnert, G, van der Plicht, H, van Strydonck, M. 2004. Future needs and requirements for AMS 14C standards and reference materials. Nuclear Instruments and Methods in Physics Research B 223–224:382–7.
Sheu, DD, Lee, WY, Wang, CH, Wei, CL, Chen, CTA, Cherng, C, Huang, MH. 1996. Depth distribution of δ13C of dissolved ΣCO2 in seawater off eastern Taiwan: effects of Kuroshio current and its associated upwelling phenomenon. Continental Shelf Research 16(12):1609–19.
Stuvier, M, Polach, H. 1977. Discussion: reporting of 14C data. Radiocarbon 19(3):355–63.
Tsuchiya, M. 1975. California Undercurrent in the South-em California Bight. California Cooperative Oceanographic Fisheries Investigation 18:155–8.
Recommend this journal

Email your librarian or administrator to recommend adding this journal to your organisation's collection.

Radiocarbon
  • ISSN: 0033-8222
  • EISSN: 1945-5755
  • URL: /core/journals/radiocarbon
Please enter your name
Please enter a valid email address
Who would you like to send this to? *
×

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