Abstract
Concentrations of inorganic and organic carbon and organic nitrogen, as well as other hydrographic and biogeochemical variables, were measured in the oligotrophic waters of the western South Pacific Ocean (5-35°S; 170°W). With those data, we assess the impact of the intertropical convergences of the western tropical Pacific Ocean on surface ocean biogeochemistry. Low salinity, oligotrophic waters of the western tropical Pacific underlying regions of high net precipitation are characterized by concentrations of organic carbon and nitrogen that are elevated relative to higher salinity (lower net precipitation) zones. We hypothesize that water column stratification, forced by high net precipitation, favors enhanced rates of N2 fixation, with resultant elevation of organic carbon and nitrogen concentrations in the region. An effect of anthropogenic ocean warming and the associated increased hydrologic cycle in the tropical Pacific may be to alter the biogeochemical cycling of carbon and nitrogen through enhancement of N2 fixation.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 1013-1016 |
| Number of pages | 4 |
| Journal | Geophysical Research Letters |
| Volume | 27 |
| Issue number | 7 |
| DOIs | |
| State | Published - 2000 |
| Externally published | Yes |
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ASJC Scopus subject areas
- Earth and Planetary Sciences (miscellaneous)
Cite this
Atmospheric intertropical convergence impacts surface ocean carbon and nitrogen biogeochemistry in the western tropical Pacific. / Hansell, Dennis A; Feely, Richard A.
In: Geophysical Research Letters, Vol. 27, No. 7, 2000, p. 1013-1016.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Atmospheric intertropical convergence impacts surface ocean carbon and nitrogen biogeochemistry in the western tropical Pacific
AU - Hansell, Dennis A
AU - Feely, Richard A.
PY - 2000
Y1 - 2000
N2 - Concentrations of inorganic and organic carbon and organic nitrogen, as well as other hydrographic and biogeochemical variables, were measured in the oligotrophic waters of the western South Pacific Ocean (5-35°S; 170°W). With those data, we assess the impact of the intertropical convergences of the western tropical Pacific Ocean on surface ocean biogeochemistry. Low salinity, oligotrophic waters of the western tropical Pacific underlying regions of high net precipitation are characterized by concentrations of organic carbon and nitrogen that are elevated relative to higher salinity (lower net precipitation) zones. We hypothesize that water column stratification, forced by high net precipitation, favors enhanced rates of N2 fixation, with resultant elevation of organic carbon and nitrogen concentrations in the region. An effect of anthropogenic ocean warming and the associated increased hydrologic cycle in the tropical Pacific may be to alter the biogeochemical cycling of carbon and nitrogen through enhancement of N2 fixation.
AB - Concentrations of inorganic and organic carbon and organic nitrogen, as well as other hydrographic and biogeochemical variables, were measured in the oligotrophic waters of the western South Pacific Ocean (5-35°S; 170°W). With those data, we assess the impact of the intertropical convergences of the western tropical Pacific Ocean on surface ocean biogeochemistry. Low salinity, oligotrophic waters of the western tropical Pacific underlying regions of high net precipitation are characterized by concentrations of organic carbon and nitrogen that are elevated relative to higher salinity (lower net precipitation) zones. We hypothesize that water column stratification, forced by high net precipitation, favors enhanced rates of N2 fixation, with resultant elevation of organic carbon and nitrogen concentrations in the region. An effect of anthropogenic ocean warming and the associated increased hydrologic cycle in the tropical Pacific may be to alter the biogeochemical cycling of carbon and nitrogen through enhancement of N2 fixation.
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U2 - 10.1029/1999GL002376
DO - 10.1029/1999GL002376
M3 - Article
VL - 27
SP - 1013
EP - 1016
JO - Geophysical Research Letters
JF - Geophysical Research Letters
SN - 0094-8276
IS - 7
ER -