Nitrate Isotope Distribution in the Subarctic and Subtropical North Pacific
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چکیده
منابع مشابه
Stable nitrogen isotope dynamics of dissolved nitrate in a transect from the North Pacific Subtropical Gyre to the Eastern Tropical North Pacific
The stable nitrogen isotopic composition of nitrate, concentrations of inorganic nitrogen and phosphorus, dissolved oxygen and nitrification rates were determined at six stations ranging from the oligotrophic North Pacific Subtropical Gyre (NPSG) to the more productive Eastern Tropical North Pacific (ETNP). Nitrification rates increased along the transect from a maximum rate of 1 nmol L 1 d 1 a...
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[1] The preformed nitrate distribution throughout the subtropical North Pacific is characterized by a negative anomaly between 100 m and the 25.4 sq surface. Its presence indicates that nitrogen remineralization in the upper thermocline deviates significantly from Redfield stoichiometry. It has been previously suggested that this feature is created during the degradation of nitrogen-poor dissol...
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Introduction Conclusions References
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-Vertical profiles of salinity S and beam attenuation coefficient c were obtained from the research platform R.P. Flip as it drifted across the North Pacific Subtropical Front (NPSF) during the Optical Dynamics Experiment (ODEX) in the autumn of 1982. Near-surface waters north of the NPSF have lower S and generally higher values of c compared with waters to the south. An anomaly in c is used to...
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Since the first evidence of low algal productivity during ice ages in the Antarctic Zone of the Southern Ocean was discovered, there has been debate as to whether it was associated with increased polar ocean stratification or with sea-ice cover, shortening the productive season. The sediment concentration of biogenic barium at Ocean Drilling Program site 882 indicates low algal productivity dur...
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ژورنال
عنوان ژورنال: Geochemistry, Geophysics, Geosystems
سال: 2018
ISSN: 1525-2027,1525-2027
DOI: 10.1029/2018gc007528