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Title: Variations of marine plankton [delta][sup 13]C with latitude, temperature, and dissolved CO[sub 2] in the world ocean

Abstract

Variations of the [sup 13]C content of marine particulate organic carbon [delta][sup 13]C[sub POC] in the modern ocean were studied using literature data to test the assumptions underlying the calculation of atmospheric pCO[sub 2] through geological time from the [delta][sup 13]C of sedimentary organic matter. These assumptions are that (1) concentrations of CO[sub 2] in the atmosphere and the surface ocean are at equilibrium at all times and latitudes and that (2) carbon isotopic fractionation of phytoplankton ([epsilon][sub p]) covaries primarily with concentrations of dissolved molecular CO[sub 2] ([CO[sub 2]][sub aq]). Previous studies and compilations have shown that the first assumption does not strictly hold, although [CO[sub 2]][sub aq] may be predicted with a reasonable degree of accuracy from sea surface temperature for specific regions of the world ocean. The second assumption is shown to be questionable due to the weak covariation of [epsilon][sub p] and [CO[sub 2]][sub aq] in the modern ocean. The large residual variance for regressions of [epsilon][sub p] against [CO[sub 2]][sub aq] suggests that factors other than [CO[sub 2]][sub aq] strongly affect carbon isotopic fractionation in phytoplankton. It is concluded that the relationship between [epsilon][sub p] and [CO[sub 2]][sub aq] cannot be easily calibrated using [delta][supmore » 13]C[sub POC] data from the modern ocean. 38 refs., 3 figs., 4 tabs.« less

Authors:
 [1];  [2]
  1. (Scripps Institution of Oceanography, La Jolla, CA (United States))
  2. (Ecosystems Center, Woods Hole, MA (United States))
Publication Date:
OSTI Identifier:
6956113
DOE Contract Number:  
FG02-92ER61438
Resource Type:
Journal Article
Journal Name:
Global Biogeochemical Cycles; (United States)
Additional Journal Information:
Journal Volume: 8:1; Journal ID: ISSN 0886-6236
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; 59 BASIC BIOLOGICAL SCIENCES; CARBON 13; VARIATIONS; DISSOLVED GASES; ECOLOGICAL CONCENTRATION; GLOBAL ASPECTS; CARBON CYCLE; LATITUDE EFFECT; BIOLOGICAL EFFECTS; PHYTOPLANKTON; CHEMICAL COMPOSITION; SEAS; TEMPERATURE MEASUREMENT; CARBON DIOXIDE; AQUATIC ORGANISMS; CARBON COMPOUNDS; CARBON ISOTOPES; CARBON OXIDES; CHALCOGENIDES; EVEN-ODD NUCLEI; FLUIDS; GASES; GEOGRAPHICAL VARIATIONS; ISOTOPES; LIGHT NUCLEI; NUCLEI; OXIDES; OXYGEN COMPOUNDS; PLANKTON; PLANTS; SOLUTES; STABLE ISOTOPES; SURFACE WATERS; 540310* - Environment, Aquatic- Basic Studies- (1990-); 550700 - Microbiology

Citation Formats

Goericke, R., and Fry, B. Variations of marine plankton [delta][sup 13]C with latitude, temperature, and dissolved CO[sub 2] in the world ocean. United States: N. p., 1994. Web. doi:10.1029/93GB03272.
Goericke, R., & Fry, B. Variations of marine plankton [delta][sup 13]C with latitude, temperature, and dissolved CO[sub 2] in the world ocean. United States. doi:10.1029/93GB03272.
Goericke, R., and Fry, B. Tue . "Variations of marine plankton [delta][sup 13]C with latitude, temperature, and dissolved CO[sub 2] in the world ocean". United States. doi:10.1029/93GB03272.
@article{osti_6956113,
title = {Variations of marine plankton [delta][sup 13]C with latitude, temperature, and dissolved CO[sub 2] in the world ocean},
author = {Goericke, R. and Fry, B.},
abstractNote = {Variations of the [sup 13]C content of marine particulate organic carbon [delta][sup 13]C[sub POC] in the modern ocean were studied using literature data to test the assumptions underlying the calculation of atmospheric pCO[sub 2] through geological time from the [delta][sup 13]C of sedimentary organic matter. These assumptions are that (1) concentrations of CO[sub 2] in the atmosphere and the surface ocean are at equilibrium at all times and latitudes and that (2) carbon isotopic fractionation of phytoplankton ([epsilon][sub p]) covaries primarily with concentrations of dissolved molecular CO[sub 2] ([CO[sub 2]][sub aq]). Previous studies and compilations have shown that the first assumption does not strictly hold, although [CO[sub 2]][sub aq] may be predicted with a reasonable degree of accuracy from sea surface temperature for specific regions of the world ocean. The second assumption is shown to be questionable due to the weak covariation of [epsilon][sub p] and [CO[sub 2]][sub aq] in the modern ocean. The large residual variance for regressions of [epsilon][sub p] against [CO[sub 2]][sub aq] suggests that factors other than [CO[sub 2]][sub aq] strongly affect carbon isotopic fractionation in phytoplankton. It is concluded that the relationship between [epsilon][sub p] and [CO[sub 2]][sub aq] cannot be easily calibrated using [delta][sup 13]C[sub POC] data from the modern ocean. 38 refs., 3 figs., 4 tabs.},
doi = {10.1029/93GB03272},
journal = {Global Biogeochemical Cycles; (United States)},
issn = {0886-6236},
number = ,
volume = 8:1,
place = {United States},
year = {1994},
month = {3}
}