台湾海峡南部海域夏季上升流颗粒有机碳含量的逐日变化特征  

Characteristics of daily variation of particulate organic carbon concentration in summer upwelling of southern Taiwan Strait

作　　者：叶翔[1] 李炎[2] 黄邦钦[2] 陈坚[1] 

机构地区：[1]国家海洋局第三海洋研究所海洋与海岸地质开放实验室,福建厦门361005 [2]厦门大学中国近海海洋环境科学国家重点实验室,福建厦门361005

出　　处：《台湾海峡》2011年第4期458-466,共9页Journal of Oceanography In Taiwan Strait

基　　金：国家海洋局青年海洋科学基金资助项目(2010327);国家海洋局第三海洋研究所基本科研业务费专项资金资助项目(2009015);国家自然科学基金资助项目(40331004)

摘　　要：根据2004～2006年夏季台湾海峡南部海域上升流区追踪过程中观测的颗粒有机碳(POC)、叶绿素a(chl-a)、总悬浮颗粒物(TSM)含量数据,3个年份夏季上升流区POC含量范围分别为0.115 0～0.244 4、0.139 1～0.650 8、0.106 8～0.535 0 mg/dm3,其平均值比同年份其他断面POC含量的平均值高.POC含量及Cchl-a/CPOC值的逐日变化对上升流事件的响应较好,反映出现场生产力对颗粒态有机碳的贡献与上升流发生过程的耦合;Cchl-a/CPOC值与chl-a含量呈正相关,在上升流的稳定期和衰减期,二者关系表现形式有所不同,能细分上升流事件的过程;上升流区的Cchl-a/CPOC值相对偏小,反映了上升流区浮游生物的高营养转换效率.POC和TSM含量的逐日变化关系在不同年份有不同表现,TSM含量对POC含量的影响存在促进和限制的可能;颗粒有机质含量占TSM比例的变化规律不明显,CPOC/CTSM值的逐日变化不能较好地响应上升流事件;CPOC/CTSM值与TSM含量关系均呈负相关;受陆源有机物的补充及现场有机物的生物地球化学过程的影响,CPOC/CTSM值与TSM含量关系更为复杂.Particulate organic carbon（ POC）, chlorophyll a（chl-a） and total suspended matter（TSM） were analysed in the Taiwan Strait in the summer upwelling period in the cruises of 2004 -2006. POC concentrations were found as 0.115 0 -0. 244 4, 0. 139 1 -0. 650 8, 0. 106 8 -0. 535 0 mg/dm3 in summer of 2004 -2006, respectively. The average concentrations of POC in upwelling area were higher than other summer cruises. The ratio Cchl.a/Cpoc was 0. 002 -0. 024. The day-to-day changes in the concentration of POC and Cchl_a/Cpocreflected the in situ pro- ductivity contributed by POC and a well coupling with the upwelling process. The positive correlation between ratio C,~l,l.JCpoc and chl-a was found in this three years. The relation of Coh~_JCpoc, which was low in the upwelling are- a, and chl-a was different between the stable phase and decline phase. It suggests that there is a high trophic trans- fer efficiency along the food chain in upwelling dominated area. The relationship of day-to-day change in POC and TSM concentration was different in the summer of 2004 - 2006. The possibility of promotion and limitation on POC both existed by the influence of TSM, which varied from 0.80 to 12.50 mg/dm3 in the upwelling area. The varia- tion of the ratio of organic matter in TSM was not clear. The day-to-day change in Cpoc/CTsM didn＇ t responded ob- viously to upwelling event. The negative correlation between ratio Croc/CTsM and TSM was found, indicating that the contribution of POC to TSM decreased with increasing TSM. Because of the supply of terrestrial matter and the influence of biogeochemical processes of organic matter, the relation between Cpoc/CTsM and CTSM became much complicated.

关 键 词：海洋环境科学 颗粒有机碳 上升流 叶绿素a 总悬浮颗粒物 台湾海峡 

分 类 号：P76[天文地球—海洋科学]