open access

https://hdl.handle.net/2115/47514

The estimate of the denitrification using nitrogen gas excess in the Sea of Okhotsk

英語

2011-10-25

We measured argon (Ar) and nitrogen (N2) gasses and firstly tried to estimate quantitatively the extent of denitrificaion in the Sea of Okhotsk with considering the bubble injection process. Dissolved N2, Ar and oxygen were obtained at six stations within this region in August, 2007 by using the method of a gas chromatography developed by Tanaka and Watanabe [2007]. With considering several recent hydrological physical data [Itoh et al., 2003; Ohshima et al., 2006], we estimated the total water-column inventory of the nitrogen gas excess above background and the denitrification rate in the Sea of Okhotsk to be 4.3±1.7 mol m-2 and 0.4-1.3±0.5 T mol y-1, respectively. This estimation of the denitrification rate in the Sea of Okhotsk was about half of that in the Arabian Sea where is known as the oxygen deficient zones, contributing significantly to the global water-column denitrification.

会議発表資料

Not Applicable (or Unknown)