Effect of synoptic scale meteorological peturbation on primary production in the Japan Sea

Onitsuka, Go*; Yanagi, Tetsuo*; Uno, Itsushi*; Kawamura, Hideyuki  ; Yoon, J.-H.*; Yamanaka, Yasuhiro*

It is suggested that seasonal variation of phytoplankton concentration in the surface layer is remarkable in the Japan Sea and it is additionally reported that increase of phytoplankton concentration is found due to synoptic scale meteorological perturbation. In this study, effect of synoptic scale meteorological perturbation and deposition of nitrogen from atmosphere on primary production in the Japan Sea is estimated in numerical experiments. Short period oscillation of primary production due to synoptic scale meteorological perturbation is dominant between April and November in the numerical experiments. It is suggested that the primary production in the Japan Sea is supported by supply of nutrient due to synoptic scale meteorological perturbation by about 5% and that from atmosphere by about 2%, respectively.