全部 标题 作者
关键词 摘要

OALib Journal期刊
ISSN: 2333-9721
费用:99美元

查看量下载量

相关文章

更多...

太湖有色可溶性有机物荧光的空间分布及其与吸收的关系

Keywords: 太湖,有色可溶性有机物,荧光,溶解性有机碳

Full-Text   Cite this paper   Add to My Lib

Abstract:

利用紫外分光光度法和荧光法测定了2004年12月到2005年3月太湖不同湖区有色可溶性有机物(CDOM)的吸收和荧光,分析了CDOM荧光发光光谱、空间分布及其与吸收系数、溶解性有机碳(DOC)浓度之间的关系。结果表明,在355nm光激发下,CDOM在450nm处荧光峰值相当明显。CDOM荧光值存在明显空间差异,高值出现在竺山湾、梅梁湾、五里湖等湖区,低值出现在东太湖、贡湖湾等湖区,污染严重的北部湖区一般高于南部湖区。定标后的荧光值Fn(355)、CDOM吸收系数a(355)、DOC浓度4个月均值分别为(11.87±3.49)N.FL.U、(3.45±1.33)m-1、(9.50±2.79)mg.L-1。Fn(355)与CDOM吸收系数、DOC浓度存在非常显著的线性关系,并且随波长降低相关性逐渐增加。4次观测到的a(355)与Fn(355)线性关系式的斜率值相差很小,相对比较稳定,a(355)与Fn(355)的比值在30%左右。

References

[1]  H(a)der D P.Effects on aquatic ecosystems[J].J Photochem Photobiol B:Biol,1998,46(1):53-68.
[2]  Carder K L,Steward R G,Harvey G R,et al.Marine humic and fulvic acids:Their effects on remote sensing of ocean chlorophyll[J].Limnol Oceanogr,1989,34:68-81.
[3]  Rochelle-Newall E J,Fisher T R.Production of chromophoric dissolved organic matter fluorescence in marine and estuarine environments:an investigation into the role of phytoplankton[J].Mar Chem,2002,77:7-21.
[4]  Ferrari G M,Dowell M D.CDOM absorption characteristics with relation to fluorescence and salinity in coastal areas of the Southern Baltic Sea[J].Estuar Coast Shelf S,1998,47(1):91-105.
[5]  Rochelle-Newall E J,Fisher T R.Chromophoric dissolved organic matter and dissolved organic carbon in Chesapeake Bay[J].Mar Chem,2002,77(1):23-41.
[6]  Kowalczuk P,Cooper W J,Whitehead R F,et al.Characterization of CDOM in an organic-rich river and surrounding coastal ocean in the South Atlantic Bight[J].Aquat Sci,2003,65(4):384-401.
[7]  张运林,吴生才,秦伯强,等.太湖梅梁湾有色可溶性有机物对光的吸收[J].中国环境科学,2004,27(4):405-409.
[8]  张运林,秦伯强,马荣华,等.太湖典型草、藻型湖区有色可溶性有机物的吸收及荧光特性[J].环境科学,2005,26(2):160-166.
[9]  Zhang Y L,Qin B Q,Chen W M,et al.A preliminary study of chromophoric dissolved organic matter (CDOM) in Lake Taihu[J].A cta Hydrochim Hydrobiol,2005,33(4):315-323.
[10]  Bricaud A,Morel A,Prieur L.Absorption by dissolved organic matter of the sea (yellow substance) in the UV and visible domain[J].Limnol Oceanogr,1981,26(1):43-53.
[11]  Keith D J,Yoder J A,Freeman S A.Spatial and temporal distribution of coloured dissolved organic matter (CDOM) in Narragansett Bay,Rhode Island:implications for phytoplankton in coastal waters[J].Estuar Coast Shelf S,2002,55(5):705-717.
[12]  Hoge F E,Vodacek A,Blough N V.Inherent optical properties of the ocean:retrieval of the absorption coefficient of chromophoric dissolved organic matter from fluorescence measurements[J].Limnol Oceanogr,1993,38(7):1394-1402.
[13]  Del Vecchio R,Blough N V.Spatial and seasonal distribution of chromophoric dissolved organic matter and dissolved organic carbon in the Middle Atlantic Bight[J].Mar Chem,2004,89(1-4):169-187.
[14]  Seritti A,Russo D,Nannicini L,et al.DOC,absorption and fluorescence properties of estuarine and coastal waters of the Northern Tyrrhenian Sea[J].Chem Spec Bioavailab,1998,10(3):95-106.
[15]  Green S,Blough N.Optical absorption and fluorescence properties of chomophoric dissolved organic matter in natural waters[J].Limnol Oceanogr,1994,39(8):1903-1916.
[16]  Ferrari G M.The relationship between chromophoric dissolved organic matter and dissolved organic carbon in the European Atlantic coastal area and in the West Mediterranean Sea (Gulf of Lions)[J].Mar Chem,2000,70(4):339-357.
[17]  Vodaeek A,Blough N V,DeGrandpre M D,et al.Seasonal variation of CDOM and DOC in the Middle Altantic Bight:terrestrial inputs and photooxidation[J].Limnol Oceanogr,1997,42(4):674-686.
[18]  王学军,马廷.应用遥感技术监测和评价太湖水质状况[J].环境科学,2000,21(6):65-68.
[19]  雷坤,郑丙辉,王桥.基于中巴地球资源1号卫星的太湖表层水体水质遥感[J].环境科学学报,2004,24(3):376-380.

Full-Text

Contact Us

service@oalib.com

QQ:3279437679

WhatsApp +8615387084133