Multi-decadal decrease of net community production in western subarctic North Pacific

Details Multi-decadal decrease of net community production in western subarctic North Pacific Multi-decadal decrease of net community production in western subarctic North Pacific

Apr 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002georl..29h..27o&link_type=abstract

Geophysical Research Letters, Volume 29, Issue 8, pp. 27-1, CiteID 1186, DOI 10.1029/2001GL014332

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Global Change: Biogeochemical Processes (4805), Oceanography: General: Climate And Interannual Variability (3309), Oceanography: Biological And Chemical: Nutrients And Nutrient Cycling

Scientific paper

Temporal variation of phosphate concentration in the mixed layer of western subarctic North Pacific from 1968 to 1998 was investigated with quasi-monthly resolution. February and July phosphate time series showed a linear decreasing trend of -0.008 +/- 0.003 and -0.019 +/- 0.005 μmol/l/y, respectively, while no multi-decadal trend was observed in April/May phosphate time series. With this result, net biological phosphate consumption between February and April linearly decreased at the rate of -0.43 +/- 0.11 mmolP/m2/y, while that between May and July increased at the rate of +0.16 +/- 0.05 mmolP/m2/y. Net biological phosphate consumption from February through August was linearly diminished at the rate of -0.40 +/- 0.07 mmolP/m2/y, corresponding to a -0.51 +/- 0.09 gC/m2/y decrease of net community production under assumption of the constant C/P ratio of 106. Chl.a inventory in the April mixed layer also showed a decreasing trend of -2.35 +/- 1.22 mg/m2/y, which correlated with the observed net production decrease between February and April.

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