The decoupling of production and particulate export in the surface ocean
- 1 June 1998
- journal article
- Published by American Geophysical Union (AGU) in Global Biogeochemical Cycles
- Vol. 12 (2) , 297-310
- https://doi.org/10.1029/97gb03366
Abstract
The relationship between primary production in the surface ocean and export of particulate organic carbon (POC) on sinking particles is examined in studies that have utilized 234Th as a tracer of upper ocean export. Comparisons between production and export are made in a wide range of open ocean settings and seasons. The results indicate that much of the ocean is characterized by low POC export relative to primary production (export/production = ThE < 5–10%). Exceptions to this pattern are found during blooms at high latitudes, accompanying spring blooms at midlatitudes, and perhaps in association with more episodic export pulses. These sites of high export are most often characterized by food webs dominated by large phytoplankton, in particular diatoms. These results can be used to better parameterize surface export in biogeochemical models in order to provide a more accurate prediction of the flow of C and associated nutrients in the oceans.Keywords
This publication has 74 references indexed in Scilit:
- Spring development of phytoplankton biomass and composition in major water masses of the Atlantic sector of the Southern OceanDeep Sea Research Part II: Topical Studies in Oceanography, 1997
- Horizontal and vertical removal of organic carbon in the equatorial Pacific Ocean: a mass balance assessmentDeep Sea Research Part II: Topical Studies in Oceanography, 1997
- Export flux of particulate organic carbon from the central equatorial Pacific determined using a combined drifting trap-234Th approachDeep Sea Research Part II: Topical Studies in Oceanography, 1996
- Primary productivity and its regulation in the equatorial Pacific during and following the 1991–1992 El NiñoDeep Sea Research Part II: Topical Studies in Oceanography, 1996
- Phytoplankton variability in the central and eastern tropical PacificDeep Sea Research Part II: Topical Studies in Oceanography, 1996
- Spatial and temporal variability of phytoplankton pigment distributions in the central equatorial Pacific OceanDeep Sea Research Part II: Topical Studies in Oceanography, 1996
- Export flux of carbon at the equator during the EqPac time-series cruises estimated from 234Th measurementsDeep Sea Research Part II: Topical Studies in Oceanography, 1996
- Seasonal and interannual variability in primary production and particle flux at Station ALOHADeep Sea Research Part II: Topical Studies in Oceanography, 1996
- Iron, primary production and carbon-nitrogen flux studies during the JGOFS North Atlantic bloom experimentDeep Sea Research Part II: Topical Studies in Oceanography, 1993
- Plankton succession and carbon cycling at 47°N 20°W during the JGOFS North Atlantic Bloom ExperimentDeep Sea Research Part II: Topical Studies in Oceanography, 1993