基于卫星遥感数据的南海海域真光层POC输出效率分布特征  

Distribution characteristics of euphotic layer POC export efficiency in the South China Sea based on remote sensing data

作　　者：刘少军[1] 蔡大鑫[1] 赵婷 韩静 佟金鹤 李光伟[1] Liu Shaojun;Cai Daxin;Zhao Ting;Han Jing;Tong Jinhe;Li Guangwei(Hainan Institute of Meteorological Science/Key Laboratory of South China Sea Meteorological Disaster Prevention and Mitigation of Hainan Province,Haikou 570203,China)

机构地区：[1]海南省气象科学研究所/海南省南海气象防灾减灾重点实验室,海口570203

出　　处：《气象研究与应用》2022年第1期41-46,共6页Journal of Meteorological Research and Application

基　　金：海南省重点研发计划项目(ZDYF2021SHFZ062);海南省自然科学基金(421QN373,421MS0811)。

摘　　要：海水中颗粒有机碳(POC)是海洋碳循环的基本变量,真光层POC输出效率在海洋固碳中起关键作用。根据2003-2018年南海区域遥感数据反演的真光层POC输出效率数据集,分析了南海海域真光层POC输出效率时空变化规律。结果表明,研究区内POC输出效率多年平均值为0.08,其在空间上分布呈现近岸高、海盆低的特征,年平均POC输出效率呈现微弱的下降趋势。在月尺度上,1月达到最高值,平均值为0.115;5月达到最低值,平均值为0.072。南海海域POC输出效率月线性倾向率呈现显著增长,区域主要集中在南海北部近岸、海南岛周边海域、南海的西部,其他为微弱减少区域;POC输出效率年线性倾向率增长区域主要分布在南海北部近岸海域、海南岛四周及南海的西部靠近海岸带区域,其他为微弱减少区域。Particulate organic carbon(POC) in seawater is the basic variable of marine carbon cycle. The output efficiency of POC in euphotic layer plays a key role in marine carbon sequestration. According to the POC output efficiency data set of euphotic layer retrieved from the remote sensing data of the South China Sea from2003 to 2018, the temporal and spatial variation law of POC output efficiency of euphotic layer in the South China Sea was analyzed. The multi-year average value of POC output efficiency in the study area is 0.08. Its spatial distribution shows the characteristics of high nearshore and low sea basin, and the annual average POC output efficiency shows a weak downward trend. On a monthly scale, the highest value reaches in January with an average of 0.115;the lowest value reaches in May with an average of 0.072. The monthly linear trend rate of POC output efficiency in the South China Sea shows a significant increase, mainly concentrating in the northern inshore of the South China Sea, the waters around Hainan Island and the west of the South China Sea, while others show a slight decrease. The growth areas of the annual linear inclination rate of POC output efficiency mainly distribute in the northern coastal waters of the South China Sea, around Hainan Island and the western part of the South China Sea near the coastal zone, and the other areas weakly reduce.

关 键 词：颗粒有机碳(POC) 通量 输出效率 南海 

分 类 号：P736[天文地球—海洋地质]