水环境中溶解有机质的光谱表征:从流域到深海  

Characterization of Aquatic Dissolved Organic Matter by Spectral Analysis:From Watershed to Deep Ocean

作　　者：郭卫东[1] 王超 李炎[3] 瞿理印 郎目晨 邓永彬 梁清隆 Guo Weidong;Wang Chao;Li Yan;Qu Liyin;Lang Muchen;Deng Yongbin;Liang Qinglong(College of Ocean and Earth Sciences,State Key Laboratory of Marine Environmental Science,Xiamen University,Xiamen 361102,China;College of Ocean and Meteorology,Guangdong Ocean University,Zhanjiang Guangdong 524088,China;Dongshan Swire Marine Station,Dongshan Fujian 363400,China)

机构地区：[1]厦门大学海洋与地球学院,近海海洋环境科学国家重点实验室,福建厦门361102 [2]广东海洋大学海洋与气象学院,广东湛江524088 [3]厦门大学东山太古海洋观测与实验站,福建东山363400

出　　处：《地球科学进展》2020年第9期933-947,共15页Advances in Earth Science

基　　金：国家自然科学基金项目“利用光谱与超高分辨率质谱表征南海—吕宋海峡—西菲律宾海的溶解有机质循环”(编号:41876083);国家自然科学基金委员会—福建省人民政府“促进海峡两岸科技合作联合基金”项目“台湾海峡浮游植物群落演变及其对河口羽流—上升流耦合系统的响应”(编号:U1805241)资助。

摘　　要：自20世纪90年代以来,光谱分析逐渐成为表征各种水环境中有色溶解有机质及其荧光组分来源和性质变化的一种重要技术手段。选取跨越了陆—海、陆架—海盆、边缘海—开阔大洋、海洋真光层—无光层等多个界面的福建漳江—漳江河口—东山湾—台湾海峡—南海东北部—吕宋海峡—西太平洋黑潮区垂直剖面,从连续载体的视角,通过对各类溶解有机质定性与定量光谱参数沿程的空间分布及变化趋势的分析,结合已有研究进展,系统总结了从流域到深海水文和生物地球化学梯度显著变化的大背景下,有色溶解有机质和荧光组分的各种来源与去除过程及其调控机制,探讨了不同水环境中溶解有机质定量光谱参数的地球化学分异特征,并对溶解有机质定性光谱指数的示踪能力进行了评析。提出土壤—河流系统的耦合研究、与矿化作用相关联的有色溶解有机质/荧光组分产生的微生物学机制、定量化的地球化学框架体系研究及全球变化的影响应是今后重点关注的课题。Since 1990 s,spectral analysis has become an important technique to characterize the properties of chromophoric and fluorescent dissolved organic matter(CDOM and FDOM)from various aquatic systems and a series of spectral indices have been suggested to trace the sources of DOM and their biogeochemical regulation processes.DOM samples were collected from an aquatic continuum from watershed to deep ocean,i.e.Zhangjiang River and Estuary,Dongshan Bay,Taiwan Strait,Northeast basin of the South China Sea,Luzon Strait and the vertical profile of the Kuroshio region of the West Pacific Ocean.This continuum covered many critical interfaces(land-ocean,shelf-basin,marginal sea basin-open ocean and euphotic and aphotic layer).The spatial distribution and variation of various qualitative and quantitative parameters along the continuum were clearly revealed.Combined with literature review,the sources and sinks of CDOM/FDOM and their inherent regulation processes under significant hydrological and biogeochemical gradient variation were systematically summarized.The geochemical differentiation of the quantitative DOM spectral index in various aquatic systems was discussed.The tracing ability of the qualitative DOM spectral index was commented.The coupling study of soil-river organic matter systems,mechanism of mineralization-related microbial production of CDOM/FDOM,quantified geochemical framework concept and perturbation of global change on CDOM/FDOM dynamics were suggested as future key topics.

关 键 词：有色溶解有机物 荧光溶解有机物 光谱参数 源汇过程 地球化学分异 

分 类 号：P736.4[天文地球—海洋地质]