Comparison Between Early and Late 21stC Phytoplankton Biomass and Dimethylsulfide Flux in the Subantarctic Southern Ocean

作     者：QU Bo Albert JGABRIC JIANG Limei LI Chunyue QU Bo;Albert J.GABRIC;JIANG Limei;LI Chunyue

作者机构：School of ScienceNantong UniversityNantong 226019China School of Environment and ScienceGriffith UniversityNathan Qld 4111Australia Nantong Chong Chuan SchoolNantong 226000China MarketingThermo Fisher ScientificShanghai 201206China 

出 版 物：《Journal of Ocean University of China》 (中国海洋大学学报（英文版）)

年 卷 期：2020年第19卷第1期

页      面：151-160页

核心收录：

学科分类：07[理学] 0713[理学-生态学] 

基　　金：the National Natural Science Foundation of China (Nos. 41276097 and 11701298) for providing research funding for this project 

主　　题：wind speed phytoplankton dimethylsulfide flux climate change subantarctic Southern Ocean 

摘      要：Time-series of chlorophyll-a(CHL),a proxy for phytoplankton biomass,and various satellite-derived climate indicators are compared in a region of the Subantarctic Southern Ocean(40°-60°S,110°-140°E)for years *** reached a minimum in winter(June)and a maximum in late summer(early February).Zonal mean CHL decreased towards the *** sea surface temperature(SST)ranged between 8℃and 15℃and peaked in late *** and SST were positively correlated from March to June,negatively correlated from July to *** and wind speed(WIND)were negatively correlated with peak WIND occurred in *** direction(WIRD)was mostly in the southwest to westerly *** Antarctic Oscillation index(AAO)and CHL were negatively correlated(R=−0.58),indicating that as synoptic wind systems move southwards,CHL increases,and conversely when wind systems move northwards,CHL decreases.A genetic algorithm is used to calibrate the biogeochemical DMS model’s key *** 4×CO2(after year 2100)Regional mean SST increases 12%-17%,WIND increases 1.2ms−1,Cloud Cover increases 4.8%and mixed layer depth(MLD)decreases *** annual CHL increases 6.3%.The annual mean DMS flux increase 25.2%,increases 37%from day 1 to day 280 and decrease 3%from day 288 to day *** general increase of DMS flux under 4×CO2 conditions indicates the Subantarctic regional climate would be affected by changes in the DMS flux,with the potential for a cooling effect in the austral summer and autumn.