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Title: Redfield ratios and regeneration rates of particulate matter in the Sea of Japan as a model of closed system
Authors: Alexander S. Bychkov
Chen-Tung Arthur Chen
Gwo-Ching Gong
Shu-Lun Wang
Contributors: 國立臺灣海洋大學:海洋環境化學與生態研究所
Date: 1996-07
Issue Date: 2017-03-01T01:10:24Z
Publisher: Geophysical Research Letters
Abstract: Abstract: Since the Sea of Japan Proper Water is formed inside the closed basin, it is straightforward to use the mass-balance method to estimate the Redfield ratios and the dissolution and decomposition rates of particulate matter. The resulting Ca/Si/C/O/N/P ratios for waters deeper than 2000 m are 23±9/57±2/98±6/125±5/13±0.9/1±0.04, in good agreement with the traditional C/O/N/P values of 106/138/16/1. The calcium and alkalinity data indicate a CaCO3 dissolution rate of 0.22±0.13 and 0.16±0.05 µmol kg−1 yr−1 respectively. The organic carbon (OC) decomposition rate is 0.89±0.05 µmol kg−1 yr−1 while the oxygen consumption rate is 1.13±0.04 µmol kg−1 yr−1. The nitrate, phosphate and silicate regeneration rates are, respectively, 0.12±0.008, 0.0091±0.0004 and 0.52±0.02 µmol kg−1 yr−1. These rates are much higher than found elsewhere in the open oceans. The Ca/Si/C/O/N/P ratios for waters immediately beneath the thermocline (300 — 600 m) are 0±8/22±2/88±9/121±7/14.7±1.3/1±0.04. The C/P ratio is lower than the traditional Redfield ratio but the N/P ratio is in very good agreement. The regeneration rates are as follows: IC= 0±0.4, OC = 3.7±0.4, O = 5.1±0.3, N = 0.62±0.06, P = 0.042±0.002 and Si = 0.93±0.05 µmol kg−1 yr−1 respectively. These values indicate that the decomposition rate of organic matter is about five times higher in the upper water than in the deeper water.
Relation: 23(14)
URI: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/41524
Appears in Collections:[海洋環境與生態研究所] 期刊論文

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