| 云南高原湖泊有色可溶性有机物和颗粒物光谱吸收特性 |
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| 引用本文： | 张运林,张恩楼,刘明亮. 云南高原湖泊有色可溶性有机物和颗粒物光谱吸收特性[J]. 湖泊科学, 2009, 21(2): 255-263 |
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| 作者姓名： | 张运林 张恩楼 刘明亮 |
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| 作者单位： | 中国科学院南京地理与湖泊研究所湖泊与环境国家重点实验室太湖湖泊生态系统研究站,南京,210008;南京农业大学资源与环境科学学院,南京,210095 |
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| 基金项目： | 国家自然科学基金，中国科学院知识创新工程方向性研究项目 |
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| 摘 要： | 云南高原湖泊是我国湖泊分布最密集的五大湖群之一,不但湖泊数量众多而且类型多样.由于湖泊所处位置海拔较高,容易受只益增强UV-B辐射影响.通过对云南高原34个湖泊有色可溶性有机物和颗粒物吸收测定,分析其光谱吸收特性及对总吸收的贡献,有利于深刻理解紫外辐射在高原湖泊内衰减.不同湖泊间CDOM吸收差异明显,其大小与水体营养盐状况相关,CDOM吸收系数与水体总氮存在显著正相关.增加背景项的指数函数模型能最好模拟CDOM光谱吸收.除在浮游植物浓度非常高的杞麓湖、听湖、星云湖,颗粒物吸收系数在675nm附近存在一个吸收蜂外,其它湖泊总颗粒物光谱吸收大致随波长的增加吸收系数逐渐降低,呈现非色素颗粒物光谱吸收特征,整体上颗粒物吸收以非色素颗粒物为主.CDOM对总吸收的贡献主要集中在600nm以下波长,尤其是400nm以下的紫外波段,其在紫外波段(350-400nm)的贡献明显要大于光合有效辐射波段(400-700nm)(ANOVA,P<0.001).特别对于透明度SD≥1.0的清澈型湖泊,CDOM吸收对紫外辐射衰减的贡献更大,其吸收很大程度上决定了紫外辐射的影响深度.
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| 关 键 词： | 云南高原 UV-B辐射 吸收系数 有色可溶性有机物 悬浮物 |
| 收稿时间： | 2008-05-12 |
| 修稿时间： | 2008-08-26 |
Spectral absorption properties of chromophoric dissolved organic matter and particulate matter in Yunnan Plateau lakes |
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| ZHANG Yunlin,ZHANG Enlou and LIU Mingliang. Spectral absorption properties of chromophoric dissolved organic matter and particulate matter in Yunnan Plateau lakes[J]. Journal of Lake Science, 2009, 21(2): 255-263 |
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| Authors: | ZHANG Yunlin ZHANG Enlou LIU Mingliang |
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| Affiliation: | 1: Taihu Lake Laboratory Ecosystem Research Station;State Key Laboratory of Lake Science and Environment;Nanjing Institute of Geography and Limnology;Chinese Academy of Sciences;Nanjing 210008;P.R.China;2: College of Natural Resources and Environmental Science;Nanjing Agricultural University;Nanjing 210095;P.R.China |
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| Abstract: | The Yunnan Plateau lakes with different lake types, located in Yunnan Province in southwestern China, are one of the five densest lake areas in China. The lakes, which are generally distributed at elevations from 1200m to 4000m above sea level, receive high intensity UV-B radiation. In this study, the spectral absorption properties of chromophoric dissolved organic matter(CDOM) and particulate matter are studied based on a wide investigation including 34 lakes in the Yunnan Plateau. The study will be helpfu... |
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| Keywords: | Yunnan Plateau lakes UV-B radiation absorption coefficient chromophoric dissolved organic matter suspended matter |
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