紫外辐射在水体中衰减的驱动因素研究进展  

Review of attenuation factors of ultraviolet radiation in water

作　　者：王锦旗[1] 宋玉芝[1] WANG Jin-qi;SONG Yu-zhi(School of Ecology and Applied Meteorology,Nanjing University of Information Science&Technology,Nanjing 210044,China)

机构地区：[1]南京信息工程大学生态与应用气象学院,江苏南京210044

出　　处：《环境生态学》2025年第1期162-168,共7页Environmental Ecology

基　　金：江苏省基础研究计划(自然科学基金)(BK20220021)资助。

摘　　要：紫外辐射(UVR)不仅会对水生生物生长发育产生一系列不利影响,还对生物地球化学过程产生影响。UVR在水体中衰减受纯水、有色可溶性有机物(CDOM)、浮游藻类及非藻类悬浮颗粒物等因素的影响。大部分水体中CDOM含量贡献较大;在溶解性有机碳(DOC)较低水体中浮游植物贡献较大,且浮游植物可影响水体CDOM浓度;在浑浊水体,颗粒物和浮游植物等是主要影响因素。海洋开阔水域中UVR生物有效光学深度较高,而内陆水体普遍较低。UVR衰减系数随辐射波长增加而减少,故UVR穿透深度随波长增加而增加。这些将对深入研究UVR在水下渗透规律,增加水生有机体适应性起重要作用。未来应重点关注气候变化背景下UVR对水体碳、氮循环,对水生有机体生理特征的影响。Ultraviolet radiation(UVR)exerts a range of detrimental effects on aquatic organisms and significantly influences on entire aquatic ecosystem.The presence of UVR in water is modulated by several factors,including pure water,chromophoric dissolved organic matter(CDOM),phytoplankton,and non-algal suspended particulate matter.Among these,CDOM is a major contributor to the attenuation of UVR in most water bodies.However,in some water bodies with low dissolved organic carbon(DOC),phytoplankton plays a notably significant role and can also influence CDOM concentrations.In turbid water bodies,particulate matter and phytoplankton are the primary influencing factors.The bio-effective optical depth of UVR is generally greater in open ocean waters compared to coastal regions,where it is comparatively lower.The attenuation coefficient of UVR diminishes as the wavelength of the radiation increases,leading to a deeper penetration with longer wavelengths.These studies are pivotal for advancing our understanding of the penetration patterns of UVR in aquatic environments and for enhancing the resilience of aquatic organisms.Future research should concentrate on the impact of UVR on water carbon and nitrogen cycling,as well as on the physiological characteristics of aquatic organisms under the background of climate change.

关 键 词：CDOM 浮游植物 非藻类悬浮颗粒物 衰减系数 

分 类 号：P339[天文地球—水文科学]