In situ production of chromophoric dissolved organic matter in coastal environments
In situ production of chromophoric dissolved organic matter in coastal environments
复制标题
DOI：
10.1029/2004gl019734
复制
发表时间：
2004-07
影响因子：
5.2
通讯作者：
Y. Yamashita;E. Tanoue
中科院分区：
文献类型：
--
作者：
Y. Yamashita;E. Tanoue
调查了日本伊势湾海洋类腐殖质荧光团的水平和垂直分布，即发色溶解有机物(CDOM)荧光。盐度和海洋类腐殖质荧光强度的分布模式表明，伊势湾表层水中河流类腐殖质类荧光团随着淡水的混合而保守分布。然而，对河流中CDOM混合行为的分析表明，伊势湾表层水体中大量海洋类腐殖质的平均荧光强度为25.1±10.6%，这不是陆源的，而是原位的。一项使用天然浮游生物的降解实验证明，一天内就能快速产生海洋类腐殖质荧光团。这一结果一致表明，海洋类腐殖质荧光团的原位生产在海岸环境中CDOM的动态变化中起着重要作用。
The horizontal and vertical distribution of marine humic‐like fluorophore, namely, chromophoric dissolved organic matter (CDOM) fluorescence, was surveyed in Ise Bay, Japan. The distribution patterns of salinity and marine humic‐like fluorescence intensity suggested that riverine humic‐like fluorophore conservatively distributed along with fresh‐sea water mixing in surface water at Ise Bay. However, analysis of mixing behavior of riverine CDOM implied that the 25.1 ± 10.6% in average of bulk marine humic‐like fluorescence intensity of Ise Bay surface waters was derived not from a terrestrial origin but an in situ production. A degradation experiment using natural plankton demonstrated the rapid production of marine humic‐like fluorophore within a day. The results consistently suggested that in situ production of marine humic‐like fluorophore plays an important role in the dynamics of CDOM in coastal environments.