TERRAPUB Journal of Oceanography

Journal of Oceanography, Vol. 65 (No. 3), pp. 433-438, 2009

Short Contribution

Modeling the Effects of Atmospheric Nitrogen Input on Biological Production in the Japan Sea

Goh Onitsuka1*, Itsushi Uno2, Tetsuo Yanagi2 and Jong-Hwan Yoon2

1Department of Fishery Science and Technology, National Fisheries University, Nagata-Honmachi, Shimonoseki 759-6595, Japan
2Research Institute for Applied Mechanics, Kyushu University, Kasugakoen, Kasuga 816-8580, Japan

(Received 30 September 2008; in revised form 16 February 2009; accepted 16 February 2009)

Abstract: The effects of atmospheric nitrogen input on biological production in the Japan Sea have been investigated using a coupled physical-ecosystem model. Comparison between the cases with and without nitrogen deposition shows a relatively large effect on primary production in the southern Japan Sea during summer to autumn, when nitrogen deposition is high and nutrient is depleted in the surface layer. The atmospheric nitrogen deposition supports >10% of the annual export production in the nearshore region along the Japanese coast. The importance of atmospheric input as a new nutrient will grow steadily with increasing deposition into the Japan Sea.

*Corresponding author E-mail: onizuka@fish-u.ac.jp

[Full text] (PDF 544 KB)