CAJ | 학술논문

采用三维荧光对珠江口磨刀门夏秋季有色溶解有机物(CDOM)时空变化进行研究,分析其组成及荧光强度。结果表明, CDOM 三维荧光峰谱包括 UV 类腐殖质 A、陆源 Vis 类腐殖质 C 和海源 Vis类腐殖质M,以及类蛋白质T。在入海过程中,其组成未发生变化,但其荧光强度随盐度增加逐渐减小,反映了CDOM主要来源是陆源,并且主要受海水物理稀释控制,是一种典型的保守混合行为。在定点站位涨落潮周期中, CDOM的荧光强度不仅受到海水稀释的作用,表层水体CDOM受到紫外线的光降解作用,同时中层水体CDOM受到浮游植物的影响,反映了盐度、紫外线强度、生物活动对CDOM具有的共同影响。
채용삼유형광대주강구마도문하추계유색용해유궤물(CDOM)시공변화진행연구,분석기조성급형광강도。결과표명, CDOM 삼유형광봉보포괄 UV 류부식질 A、륙원 Vis 류부식질 C 화해원 Vis류부식질M,이급류단백질T。재입해과정중,기조성미발생변화,단기형광강도수염도증가축점감소,반영료CDOM주요래원시륙원,병차주요수해수물리희석공제,시일충전형적보수혼합행위。재정점참위창락조주기중, CDOM적형광강도불부수도해수희석적작용,표층수체CDOM수도자외선적광강해작용,동시중층수체CDOM수도부유식물적영향,반영료염도、자외선강도、생물활동대CDOM구유적공동영향。
The composition and fluorescence intensity of CDOM at Modaomen Estuary of the Pearl River were analyzed with EEMs method in summer-autumn, 2011. The results indicated that EEMs include UV humic-like A, visible-terrestrial humic-like C, visible-marine humic-like M, and tryptophan-like T. During the CDOM transporting into the sea, the fluorescence intensity of CDOM decreased with increased salinity but its composition little changed, reflecting the major source of CDOM resulted from terrestrial and its fluorescence intensity controlled by physical dilution which is a typical conservative mixing behavior. During the period of flooding and ebbing at fixed observation station, the fluorescence intensity of CDOM was not only controlled by physical dilution of seawater, but also controlled by UV light in surface water and more controlled by phytoplankton in middle-level water, sug-gesting that the characteristics of CDOM were affected by salinity, UV light and bio-activities together.