Nitrate anomaly in the upper nutricline in the northern South China Sea - Evidence for nitrogen fixation

Details Nitrate anomaly in the upper nutricline in the northern South China Sea - Evidence for nitrogen fixation Nitrate anomaly in the upper nutricline in the northern South China Sea - Evidence for nitrogen fixation

Dec 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002georl..29w..12w&link_type=abstract

Geophysical Research Letters, Volume 29, Issue 23, pp. 12-1, CiteID 2097, DOI 10.1029/2002GL015796

Mathematics

Logic

13

Geochemistry: Marine Geochemistry (4835, 4850), Oceanography: Biological And Chemical: Inorganic Marine Chemistry, Oceanography: Biological And Chemical: Nutrients And Nutrient Cycling, Global Change: Biogeochemical Processes (4805), Oceanography: Biological And Chemical: Biogeochemical Cycles (1615), Oceanography: General: Diurnal, Seasonal, And Annual Cycles, Oceanography: General: Marginal And Semienclosed Seas

Scientific paper

Up to 2 μM of nitrate anomaly, N*, were found in the upper nutricline at the South East Asia Time-series Study (SEATS) site in the northern South China Sea (SCS). These concentrations were among the higher values reported in the Pacific and indicate the significant contribution of the remineralization of nitrogen-rich organic matter formed by nitrogen fixation to the nutrient dynamics of the area. The concentrations were systematically higher, by up to 2.5 μM, in the Fall through the early Spring, during the northeast monsoon, than in the Summer, suggesting that the impact of nitrogen fixation was higher during the former time period. This pattern is in phase with that of the atmospheric deposition of Asian dust to the northern SCS. The coherence is consistent with a coupling between nitrogen fixation and the availability of atmospherically derived iron.

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