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Redfield ratios revisited:: Removing the biasing effect of anthropogenic CO2
被引:0
|作者:
Körtzinger, A
[1
]
Hedges, JI
[1
]
Quay, PD
[1
]
机构:
[1] Univ Washington, Sch Oceanog, Seattle, WA 98195 USA
关键词:
D O I:
暂无
中图分类号:
Q [生物科学];
学科分类号:
07 ;
0710 ;
09 ;
摘要:
Redfield ratios of remineralization are calculated based on chemical data analysis on isopycnal surfaces. The concentrations of dissolved inorganic carbon used in this study were corrected for the anthropogenic CO2 content as estimated with a back-calculation technique. The corrections increased the apparent carbon remineralization by 25-30%, thus proving important for the reliable estimation of Redfield carbon ratios in the presence of anthropogenic CO2. Best estimates from this study largely confirm the more recently published Redfield ratios of remineralization. The following results were obtained for the latitude range 3-41 degreesN along 20-29 degreesW in the Northeast Atlantic Ocean: C-org:P ratio = 123 + 10; C-org:N ratio = 7.2 +/- 0.8; -O-2:C-org ratio = 1.34 +/- 0.06; -O-2:P ratio = 165 +/- 15; N:P ratio = 17.5 +/- 2.0. These ratios are in close agreement with the average composition of phytoplankton and represent respiration of organic matter consisting on average of 52% protein. 36% polysaccharide, and 12% lipid.
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页码:964 / 970
页数:7
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