PUBLICATIONS Journal of Geophysical Research: Biogeosciences RESEARCH ARTICLE Contributions of physical and biogeochemical processes to 10.1002/2016JG003331 phytoplankton biomass enhancement in the surface and Key Points: subsurface layers during the passage of • Typhoon Damrey increased the phytoplankton biomass in both the Typhoon Damrey surface and subsurface layers • Phytoplankton biomass experienced Shanshan Pan1,2, Jie Shi1,2 , Huiwang Gao1,2 , Xinyu Guo1,2,3 , Xiaohong Yao1,2 , and different changing processes in the 1,2 two layers Xiang Gong • Contributions of physical and 1 2 biogeochemical processes were Key Laboratory of Marine Environment and Ecology, Ministry of Education, Qingdao, China, College of Environmental 3 different in the two layers Science and Engineering, Ocean University of China, Qingdao, China, Center for Marine Environmental Studies, Ehime University, Matsuyama, Japan Correspondence to: Abstract In this study, a one-dimensional physical-biogeochemical coupled model was established to J. Shi, investigate the responses of the upper ocean to Typhoon Damrey in the basin area of the South China
[email protected] À Sea. The surface chlorophyll a concentration (Chl a) increased rapidly from 0.07 to 0.17 mg m 3 when the À typhoon arrived and then gradually reached a peak of 0.61 mg m 3 after the typhoon’s passage. The Citation: À3 Pan, S., J. Shi, H. Gao, X. Guo, X. Yao, and subsurface Chl a decreased from 0.34 to 0.17 mg m as the typhoon arrived and then increased gradually to À3 X. Gong (2017), Contributions of physi- 0.71 mg m . Analyses of model results indicated that the initial rapid increase in the surface Chl a and the cal and biogeochemical processes to decrease in the subsurface Chl a were caused mainly by physical process (vertical mixing), whereas the phytoplankton biomass enhancement in the surface and subsurface layers subsequent gradual increases in the Chl a in both the surface and subsurface layers were due mainly to during the passage of Typhoon Damrey, biogeochemical processes (net growth of phytoplankton).