inter-shelf nutrient transport from the east china sea as a major nutrient source supporting winter primary production on the northeast south china sea shelf
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ID: 236196
2013
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Abstract
The East China Sea (ECS) and the South China Sea (SCS) are two
major marginal seas of the North Pacific with distinct seasonal variations
of primary productivity. Based upon field observations covering both the ECS
and the northern SCS (NSCS) during December 2008–January 2009, we examined
southward long-range transport of nutrients from the ECS to the northeastern
SCS (NESCS) carried by the China Coastal Current (CCC) driven by the
prevailing northeast monsoon in wintertime. These escaped nutrients from the
ECS shelf, where primary production (PP) was limited in winter, might however
refuel the PP on the NESCS shelf at lower latitude, where the water
temperature remained favorable, but river-sourced nutrients were limited. By
combining the field observation of nitrate+nitrite (NO3+NO2,
DIN) with our best estimate of volume transport of the CCC, we derived a
first-order estimate for DIN flux of 1430 ± 1024 mol s−1. Under
the assumption that DIN was the limiting nutrient, such southward DIN
transport would have stimulated 8.84 ± 6.33 × 1011 gC of
new production (NP), accounting for 33–74% of the NP or 14–22% of PP
in winter on the NESCS shelf shallower than 100 m.
| Reference Key |
han2013biogeosciencesinter-shelf
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|---|---|
| Authors | ;A. Q. Han;M. H. Dai;J. P. Gan;S.-J. Kao;X. Z. Zhao;S. Jan;Q. Li;H. Lin;C.-T. A. Chen;L. Wang;J. Y. Hu;L. F. Wang;F. Gong |
| Journal | tetrahedron letters |
| Year | 2013 |
| DOI |
10.5194/bg-10-8159-2013
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| URL | |
| Keywords |
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