IMHE OpenIR  > 山地表生过程与生态调控重点实验室
基于三维荧光及平行因子分析的川西高原河流水体CDOM特征
Alternative TitleCharacteristics of Chromophoric Dissolved Organic Matter (CDOM) in Rivers of Western Sichuan Plateau Based on EEM-PARAFAC Analysis
刘堰杨1; 秦纪洪2; 刘琛3; 孙辉1; 唐翔宇3; 范诗雨1
Corresponding Author孙辉
2018
Source Publication环境科学
ISSN0250-3301
Volume39Issue:2Pages:720-728
SubtypeArticle
Contribution Rank3
Abstract川西高原草甸和高寒湿地是青藏高原重要土壤碳库之一,高原河流水体溶解性有机碳特征及其与土壤碳库关系研究,对于理解高寒区域土壤碳输出通量及强度具有重要意义.本文对川西高原高山峡谷区河流(岷江上游、杂谷脑河、抚边河)和高原夷平面河流(白河)水体有色溶解性有机质(CDOM)采用三维荧光及平行因子法(EEM-PARAFAC)进行了分析.结果表明:①高原河流中CDOM主要有3种组分,即C_1(260/480, UVC类腐殖质)、C_2 [310/420(570), UVA类腐殖质]和C_3(280/370,类色氨酸);②河流沿程变化特征显示,高山峡谷区河流总荧光强度值较低,变化范围窄,高原夷平面河流(白河)与其相反;同时白河类腐殖质(C_1、C_2)荧光强度远高于其他3条河流,表明白河中源于沿岸草甸和湿地的陆源腐殖质高,而其余高山峡谷区3条河流陆源腐殖质输入相对低;③水体荧光特征参数(荧光指数FI、自生源指数BIX、腐殖化系数HIXb、新鲜度指数beta:alpha)表明,高山峡谷区河流CDOM来源具有外源兼内源双重特征,腐殖化程度低;高原夷平面河流CDOM腐殖化程度相对较高且降解程度低;④相关性分析发现4条河流中C_1、C_2极显著正相关,且白河C_1、C_2、C_3呈极显著正相关;所有河流beta:alpha与BIX呈极显著正相关,溶解性有机碳(DOC)与355 nm处吸收系数[alpha(355)]相关性不显著.
Other AbstractAlpine meadows and wetlands of western Sichuan plateau are essential organic carbon pools for Tibetan plateau; thus, a thorough understanding of the characteristics of dissolved organic carbon (DOC) and its association with soil carbon storage pool helps to reveal the flux and intensity of DOC export in the area. Surface water samples were collected from three rivers (the upper reaches of Min River, Zagunao River,and Fubian River) in the alpine-gorge region and Bai River in the plateau planation surface distributed among the watersheds in western Sichuan plateau,Southwest China. UV absorbance and EEM fluorescence spectroscopy with parallel factor analysis (PARAFAC) was used to characterize chromophoric dissolved organic matter (CDOM). PARAFAC produced a three-component model: C_1 (260/480) and C_2 (310/420) represented terrestrial humic-like fluorophores,and C_3 (280/370) belonged to tyrosine-like substances. The total fluorescence intensity of CDOM in the alpine-gorge region showed fewer changes along the rivers and was lower than that of the Bai River in the hilly plateau. The Bai River had much higher concentrations of humic-like substances (C_1, C2) compared to the other three rivers,indicating its terrestrial sources with high humification degree originated from meadows and watersheds along the river. The calculated fluorescence indices (FI, BIX, HIX,beta:alpha) showed that CDOM in the alpine-gorge region was a mixture with both autochthonous and allochthonous origins with low humification degree, while CDOM in the plateau planation surface had a higher degree of humification and lower extent of degradation. Statistical analysis showed that the C_1 and C_2 components in four rivers were significantly positively correlated, and C_1, C_2 and C_3 components in Bai River were significantly positively correlated. beta:alpha and BIX were significantly positively correlated in four rivers, but there was no significant correlation between DOC and CDOM [a(355)].
Keyword三维荧光及平行因子法(EEM-PARAFAC) 有色溶解性有机质 天然水体 川西高原河流
DOI10.13227/j.hjkx.201708208
Indexed ByCSCD
Language中文
CSCD IDCSCD:6154541
Citation statistics
Cited Times:13[CSCD]   [CSCD Record]
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/23043
Collection山地表生过程与生态调控重点实验室
Affiliation1.四川大学环境科学与工程系/四川省土壤环境保护工程技术中心;
2.成都大学环境系;
3.中国科学院水利部成都山地灾害与环境研究所
Recommended Citation
GB/T 7714
刘堰杨,秦纪洪,刘琛,等. 基于三维荧光及平行因子分析的川西高原河流水体CDOM特征[J]. 环境科学,2018,39(2):720-728.
APA 刘堰杨,秦纪洪,刘琛,孙辉,唐翔宇,&范诗雨.(2018).基于三维荧光及平行因子分析的川西高原河流水体CDOM特征.环境科学,39(2),720-728.
MLA 刘堰杨,et al."基于三维荧光及平行因子分析的川西高原河流水体CDOM特征".环境科学 39.2(2018):720-728.
Files in This Item:
File Name/Size DocType Version Access License
基于三维荧光及平行因子分析的川西高原河流(972KB)期刊论文出版稿开放获取CC BY-NC-SAView Application Full Text
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[刘堰杨]'s Articles
[秦纪洪]'s Articles
[刘琛]'s Articles
Baidu academic
Similar articles in Baidu academic
[刘堰杨]'s Articles
[秦纪洪]'s Articles
[刘琛]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[刘堰杨]'s Articles
[秦纪洪]'s Articles
[刘琛]'s Articles
Terms of Use
No data!
Social Bookmark/Share
File name: 基于三维荧光及平行因子分析的川西高原河流水体CDOM特征_刘堰杨.pdf
Format: Adobe PDF
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.