[A-OS13] Marine ecosystems and biogeochemical cycles: theory, observation and modeling

[AOS13-08] Estimating the effects of climate change on carbon flux by diel vertical migrate zooplankton in a one-dimensional ocean model

*Chenying Guo^1,2, Peng Xiu³ (1.South China Sea Institution of Oceanology, Chinese Academy of Sciences, 2.Nansha-South China Agricultural University Fishery Research Institute,Guangzhou, 3.Xiamen University)

Keywords:zooplankton , diel vertical migration , climate change, carbon flux

Diel vertical migration (DVM) of zooplankton was a key component of biological pump, transporting carbon into the deep layer, reducing the concentration of carbon dioxide in the atmosphere and mitigating the effects of global warming. However, DVM was generally overlooked in those Earth system models(ESMs) which used to estimating climate change in the future. This study simulated zooplankton DVM from 2015 to 2100 using a one-dimensional model ROMS-CoSiNE at the ALOHA site (225E, 20N). The model was run under different scenarios (SSP126, SSP245, SSP370 and SSP585) and forced by the physical and biogeochemical data from four ESM outputs with complete ecological modules in the sixth phase of the Coupled model Comparison Program (CMIP6). Three experiment groups: DVM, DVM+Q10 and noDVM were set up to evaluate the temperature effects on plankton activity as well as effects of zooplankton DVM on active carbon fluxes. The model outputs with different forcing data were assembled and compared among different groups and scenarios. The analyzed results indicated the importance of zooplankton DVM in the marine ecosystem.