Factors controlling the flux of organic carbon to the bathypelagic zone of the ocean

被引:425
作者
Francois, R [1 ]
Honjo, S [1 ]
Krishfield, R [1 ]
Manganini, S [1 ]
机构
[1] Woods Hole Oceanog Inst, Woods Hole, MA 02543 USA
关键词
biological pump; carbon flux; sediment trap; remineralization profile;
D O I
10.1029/2001GB001722
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
[1] Particle fluxes measured with time series sediment traps deployed below 2000 m at 68 sites in the world ocean are combined with satellite-derived estimates of export production from the overlying water to assess the factors affecting the transfer of particulate organic matter from surface to deep water. Multiple linear regression is used to derive an algorithm suggesting that the transfer efficiency of organic carbon, defined as the settling flux of organic carbon normalized to export production, increases with the flux of carbonate and decreases with water depth and seasonality. The algorithm predicts >80% of the organic carbon transfer efficiency variability in diverse oceanic regions. The influence of the carbonate flux suggests that the ballasting effect of this biogenic mineral may be an important factor promoting export of organic carbon to the deep sea by increasing the density of settling particles. However, the lack of a similar effect for biogenic opal suggests that factors other than particle density also play a role. The adverse effect of increasing seasonality on the transfer efficiency of carbon to the deep sea is tentatively attributed to greater biodegradability of organic matter exported during bloom events. In high latitude opal-dominated regions with high f-ratios and seasonality, while a higher fraction of net production is exported, a higher fraction of the exported organic matter is remineralized before reaching bathypelagic depths. On the other hand, in warm, low latitude, carbonate-dominated regions with low f-ratios and seasonality, a higher fraction of the exported organic matter sinks to the deep sea.
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页数:20
相关论文
共 71 条
[1]   ON THE HYDROGEN AND OXYGEN-CONTENT OF MARINE-PHYTOPLANKTON [J].
ANDERSON, LA .
DEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS, 1995, 42 (09) :1675-1680
[2]  
[Anonymous], 1996, PARTICLE FLUX OCEANS
[3]   A new, mechanistic model for organic carbon fluxes in the ocean based on the quantitative association of POC with ballast minerals [J].
Armstrong, RA ;
Lee, C ;
Hedges, JI ;
Honjo, S ;
Wakeham, SG .
DEEP-SEA RESEARCH PART II-TOPICAL STUDIES IN OCEANOGRAPHY, 2001, 49 (1-3) :219-236
[4]   Nutrient trapping in the equatorial Pacific: The ocean circulation solution [J].
Aumont, O ;
Orr, JC ;
Monfray, P ;
Madec, G ;
Maier-Reimer, E .
GLOBAL BIOGEOCHEMICAL CYCLES, 1999, 13 (02) :351-369
[5]   DISSOLVED ORGANIC CARBON IN MODELING OCEANIC NEW PRODUCTION [J].
Bacastow, R. ;
Maier-Reimer, E. .
GLOBAL BIOGEOCHEMICAL CYCLES, 1991, 5 (01) :71-85
[6]   Primary productivity and its regulation in the equatorial Pacific during and following the 1991-1992 El Nino [J].
Barber, RT ;
Sanderson, MP ;
Lindley, ST ;
Chai, F ;
Newton, J ;
Trees, CC ;
Foley, DG ;
Chavez, FP .
DEEP-SEA RESEARCH PART II-TOPICAL STUDIES IN OCEANOGRAPHY, 1996, 43 (4-6) :933-969
[7]   Photosynthetic rates derived from satellite-based chlorophyll concentration [J].
Behrenfeld, MJ ;
Falkowski, PG .
LIMNOLOGY AND OCEANOGRAPHY, 1997, 42 (01) :1-20
[8]  
Berger W.H., 1990, PALAEOGEOGR PALAEOCL, V89, P245, DOI DOI 10.1016/0031-0182(90)90065-F
[9]  
Berger W. H., 1990, PRODUCTIVITY OCEANS, P1
[10]   PRIMARY PRODUCTIVITY AND PARTICLE FLUXES ON A TRANSECT OF THE EQUATOR AT 153-DEGREES-W IN THE PACIFIC-OCEAN [J].
BETZER, PR ;
SHOWERS, WJ ;
LAWS, EA ;
WINN, CD ;
DITULLIO, GR ;
KROOPNICK, PM .
DEEP-SEA RESEARCH PART A-OCEANOGRAPHIC RESEARCH PAPERS, 1984, 31 (01) :1-11