Based on satellite remote sensing dataset and survey data during upwelling season of 2015, the spatial structures of phytoplankton biomass and community for the first time in the eastern Hainan upwelling (EHU) and its adjacent area, the eastern Leizhou Peninsula upwelling (ELPU) were illustrated. It is found that a significant cold tongue with high salinity and low temperature along the eastern Hainan coast driven by upwelling-favorable summer monsoon. The ELPU was relative weaker than the EHU because of its wide and gentle continental slope. Due to mixing by tides and waves, DO concentration with high value (>6.0 mg/L) were almost homogenous from surface to 30 m depth at the EHU. Beneath that, low DO water (<6.0 mg/L, anoxia) were pumped upward from bottom by the upwelling. The ELPU has worse DO condition compared with the EHU where bottom DO were lower than 3.5 mg/L owing to abundant DO consumption. The phytoplankton biomass reached maximal value about 1.5 mg/m³ at 30 m depth layer rather than surface layer at the EHU indicating the impact limit of upwelling on phytoplankton growth and DO distribution. Nourished by rich nutrient input, the phytoplankton biomass at the ELPU were much higher than the EHU where the maximal value can reach about 4.0 mg/m³. The phytoplankton biomass were reduced to about 0.2–0.3 mg/m³ at the offshore areas of the EHU and ELPU which were close to the value at open sea. At the inshore of the EHU, the phytoplankton community was dominated by diatom which accounted for about 50% of phytoplankton biomass. And prokaryotes (about 40%), green algae (about 20%) and prochlorococcus (about 20%) became main species at the offshore of the EHU. At the ELPU, diatom accounted for about 80% of phytoplankton biomass followed by green algae, indicating a different ecosystem at this region compared with the EHU.

基于2015年上升流季节的卫星遥感数据集和调查数据，首次说明了海南东部上升流域（EHU）及其邻近地区雷州半岛东部上升流域（ELPU）浮游植物生物量和群落的空间结构。研究发现，在有利于夏季风的上升季风带动下，海南东部沿海地区出现了盐度高，温度低的显着冷舌。ELPU由于其宽而平缓的大陆坡度比EHU相对较弱。由于潮汐和波浪的混合作用，EHU的高浓度DO（> 6.0 mg / L）从表面到30 m深度几乎均匀。在此之下，低溶解氧水（<6.0 mg / L，缺氧）通过上升流从底部向上泵送。与EHU相比，ELPU的DO条件更差，后者由于大量的DO消耗而使底部DO低于3.5 mg / L。浮游植物生物量达到最大值约1.5 mg / m在EHU的30 m深度层而不是表层处显示³，表明上升流对浮游植物生长和DO分布的影响极限。通过丰富的养分投入，ELPU的浮游植物生物量远高于EHU，EHU的最大值可达到4.0 mg / m ³。浮游植物的生物量减少到约0.2–0.3 mg / m ³在EHU和ELPU的近海地区，其价格接近公海。在EHU的近岸，浮游植物群落以硅藻为主，硅藻约占浮游生物量的50％。在EHU的近海，原核生物（约40％），绿藻（约20％）和原球菌（约20％）成为主要物种。在ELPU，硅藻约占浮游植物生物量的80％，其次是绿藻，这表明该地区的生态系统与EHU有所不同。