热带东印度洋6°N断面有色可溶性有机物(CDOM)光谱吸收特性*

doi:10.11978/j.issn.1009-5470.2013.04.003

热带海洋学报 ›› 2013, Vol. 32 ›› Issue (4): 13-21.doi: 10.11978/j.issn.1009-5470.2013.04.003cstr: 32234.14.j.issn.1009-5470.2013.04.003

所属专题：海上丝绸之路专题

热带东印度洋6°N断面有色可溶性有机物(CDOM)光谱吸收特性^*

胡水波^{1, 2}, 曹文熙¹, 林俊芳^{1, 2}, 杨跃忠¹, 王桂芬¹, 周雯¹

1. 热带海洋环境国家重点实验室(中国科学院南海海洋研究所), 广东广州 510301; 2. 中国科学院大学, 北京100049;

收稿日期:2011-09-05 修回日期:2011-10-25 出版日期:2013-10-20 发布日期:2013-10-30
通讯作者: 曹文熙。E-mail: wxcao@scsio.ac.cn
作者简介:胡水波(1987—), 男, 河南省周口市人, 硕士, 主要从事海洋光学研究。E-mail: hsb514@163.com
基金资助:
国家自然科学基金-广东省自然科学基金联合资助项目(U0933005)

Spectral absorption properties of colored dissolved organic matter along 6°N transect of tropical eastern Indian Ocean

HU Shui-bo^{1, 2}, CAO Wen-xi¹, LIN Jun-fang^{1, 2}, YANG Yue-zhong¹, WANG Gui-fen¹, ZHOU wen¹

1. State Key Laboratory of Tropical Oceanography (South China Sea Institute of Oceanology, Chinese Academy of Sciences), Guangzhou 510301, China; 2. University of Chinese Academy of Sciences, Beijing 100049, China;

Received:2011-09-05 Revised:2011-10-25 Online:2013-10-20 Published:2013-10-30

摘要/Abstract

摘要： 有色可溶性有机物 (colored dissolved organic matter, CDOM)光谱吸收特性是构建生物光学模型及水色遥感反演算法的重要基础。在2011年4月1日至5月中旬的东印度洋综合科学考察实验研究航次中, 采集了6^°N断面9个站位的CDOM样品并进行了测量; 通过分析吸收系数a_CDOM、光谱斜率值S、CDOM分子量相对大小的指示参数 M值等参量, 探讨了该断面处CDOM浓度与组成成分的分布及影响因素。分析结果发现, a_CDOM(355)的变化范围为0.131—0.524m^-1, 平均值为0.272m^-1; a_CDOM(375)的变化范围为0.081—0.453m^-1, 平均值为0.242m^-1, 该范围小于近岸水体, 高于东南太平洋海水, 与南海北部18^°N断面相近。叶绿素a浓度与CDOM吸收系数及光谱斜率没有表现出明显的相关性。CDOM光谱斜率的变化范围较大, 其中S_300—500nm的变化范围为0.008—0.019nm^-1, 平均值为0.012nm^-1。S_300—350nm与M值之间表现出正相关关系, 吸收系数与光谱斜率及M值呈现出很好的负相关关系。结合该断面CTD资料发现, 在30—90m水层高盐水团的影响下, M值在高盐区的平均值大于其右侧相同深度的结果, a_CDOM(355) 在高盐区的平均值小于其右侧相同深度的结果; 在垂直方向上, 受高盐水团影响区域M值没有表现出明显规律, 而在其右侧则随着深度的增加M值逐渐减小, a_CDOM(355)逐渐增加。

关键词: 有色可溶性有机物(CDOM), 光谱吸收系数, 热带东印度洋

Abstract: The spectral absorption properties of colored dissolved organic matter (CDOM) is important for building bio-optical model and for quantitative ocean color remote sensing. During the Eastern Indian Ocean Integrated Scientific Investigation Cruise from April 1 to mid-May, 2011, CDOM was sampled at nine stations along 6°N. Based on the dataset of 36 samples, we examined the relationship between spectral absorption coefficients and the slope of absorption curve (S). Over the whole transect, a_CDOM(355) spanned the range of 0.131-0.524 m^-1 with an average value of 0.272 m^-1, and a_CDOM(375) varied between 0.081 and 0.453 m^-1 with an average value of 0.242 m^-1. The concentration of CDOM was lower than that of nearshore waters, similar to the findings along 18°N of the South China Sea. There exists low correlation between chlorophyll a and absorption coefficient of CDOM. S_300—500nm varied between 0.008 and 0.019 nm^-1, averaging 0.012 nm^-1; S_300—350nmwas a good indication to M, the molecular relative weight of CDOM. Absorption coefficient and Sof CDOM showed a good negative correlation, so did Mand absorption coefficient. By analyzing CTD data along the 6^oN section, water mass with high salinity at depth 30-90 m was found to have an impact on horizontal and vertical distribution of Mand a_CDOM(355).

Key words: colored dissolved organic matter(CDOM), spectral absorption coefficient, tropical eastern Indian Ocean

中图分类号:

P724

胡水波, 曹文熙, 林俊芳, 杨跃忠, 王桂芬, 周雯. 热带东印度洋6°N断面有色可溶性有机物(CDOM)光谱吸收特性^*[J]. 热带海洋学报, 2013, 32(4): 13-21.

HU Shui-bo, CAO Wen-xi, LIN Jun-fang, YANG Yue-zhong, WANG Gui-fen, ZHOU wen. Spectral absorption properties of colored dissolved organic matter along 6°N transect of tropical eastern Indian Ocean[J]. Journal of Tropical Oceanography, 2013, 32(4): 13-21.

参考文献

[1]CARDER K L, STEWARD R G, HARVEY G R, et al. Marine humic and fulvic acids: Their effects on remote sensing of oceanchlorophyll[J]. Limnol Oceanogr, 1989, 34: 68-81.
[2]KIRK J T O. Light and photosynthesis in aquatic ecosystem[M]. Cambridge: Cambridge University Press, 1994, 52-90.
[3]GRANSKOG M A, MACDONALD R W, MUNDY C J, et al. Distribution, characteristics and potential impacts of chromophoric dissolved organic matter(CDOM)in Hudson Strait and Hudson Bay, Canada[J]. Cont Shelf Res, 2007, 27: 2032-2050.
[4]BRICAUD A,MOREL A,PRIEUR L. Absorption by dissolved organic matter of the sea (yellow substance) in the UV and visible domain[J]. Limnol Oceanor, 1981, 26(1): 43-53.
[5]STEDMON C A, MARKAGER S. The optics of chromophoric dissolved organic matter (CDOM) in the Greenland Sea: an algorithm for differentiation between marine and terrestrially derived organic matter[J]. Limnol Oceanogr, 2004, 46: 2087-2093.
[6]CARDER K L, HAWES S K, BAKER K A, et al. Reflectance model for quantifying chlorophyll a in the presence of productivity degradation products[J]. J Geophys Res, 1991, 96: 20599-20611.
[7]NELSON N B, SIEGELD A, MICHAELS A F. Seasonal dynamics of colored dissolved organic material in the Sargasso Sea[J]. Deep-Sea Res I, 1998, 45: 931-957.
[8]BRICAUD A, BABIN M, CLAUSTRE H, et al. Light absorption properties and absorption budget of Southeast Pacific waters[J]. J Geophys Res, 2010, 115: C08009.
[9]MORRIS D P, HARGREAVES B P. The role of photochemical degradation of dissolved organic carbon in regulating the UV transparency of three lakes on the Pocono Plateau[J]. Limnol Oceanogr, 1997, 42(2): 239-249.
[10]CHEN Z Q, LI Y, PAN J M. The distributions of the optical properties of colored dissolved organic matter and dissolved organic carbon in the Pearl River Estuary[J]. Continent Shelf Research, 2004, 24: 1845-1856.
[11]FERRARI G M, DOWELL M D, GROSSI S, et al. Relationship between the optical properties of chromophoric dissolved organic matter and total concent ration of dissolved organic carbon in the southern Baltic Sea region[J]. Mar Chem, 1996, 55: 299-316.
[12]ZHAO J, CAO W X, WANG G F, et al. The variations in optical properties of CDOM throughout an algal bloom event[J]. Estuar Coast Shelf Sci, 2009, 82: 225-232.
[13]陈楚群, 潘志林, 施平. 海水光谱模拟及其在黄色物质遥感反演中的应用[J] . 热带海洋学报, 2003, 22(5): 33-39.
[14]HONG H S, WU J Y, SHANG S L, et al. Absorption and fluorescence of chromophoric dissolved organic matter in the Pearl River Estuary, South China[J]. Mar Chem, 2005, 97: 78-89.
[15]MARKAGER S, VINCENT W F. Spectral light attenuation and the absorption of UV and blue light in natural waters[J]. Limnol Oceanogr, 2000, 45: 642-650.
[16]HAAN D H. Solar UV light penetration and photodegradation of humic substances in peaty lake water[J]. Limnol Oceanor, 1993, 38(5): 1072-1076.
[17]HELMS J R, STUBBINS A, RITCHIEJ D, et al. Absorption spectral slopes and slope ratios as indicators of molecular weight, source, and photobleaching of chromophoric dissolved organic matter[J]. Limnol Oceanogr, 2008, 53: 955-969.
[18]PEGAU W, GRAY D, ZANEVELD J R V. Absorption and attenuation of visible and near-infrared light in water:dependence on temperature and salinity[J]. Appl Opt, 1997, 36: 6035-6046.
[19]STEDMON C A, AMON R, RINEHART A J, et al. The supply and characteristics of colored dissolved organic matter (CDOM) in the Arctic Ocean: Pan Arctic trends and differences[J]. Mar Chem, 2011, 124: 108-118.
[20]NELSON N B, SIEGEL D A, CARLSON C A, et al. Hydrography of chromophoric dissolved organic matter in the North Atlantic[J]. Deep-Sea Res Ⅰ, 2007, 54: 710-731.
[21]FINE R A, SMETHIE W M, BULLISTER J L, et al. Decadal ventilation and mixing of Indian Ocean waters[J]. Deep-sea Res, 2008, 55: 20-37.
[22]AHMAD S M, BABU G A, PADMAKUMARI V M, et al. Surface and deep water changes in the northeast Indian Ocean during the last 60 ka inferred from carbon and oxygen isotopes of planktonic and benthic foraminifera[J]. Palaeogeography, 2008, 262: 162-188.
[23]KANTHA L, ROJSIRAPHISAL T, LOPEZ J. The North Indian Ocean circulation and its variability as seen in a numerical hindcast of the years 1993-2004[J]. Prog Oceanogr, 2008, 76: 111-147.
[24]MUELLER J L, FARGION G S, MCCLAINC R, et al. Ocean optics protocols for satellite ocean color sensor validation, Revision 4, Volume Ⅳ: Inherent Optical Properties: Instruments, Characterization, Field Measurements and Data Analysis Protocols[R]. Mitchell B G, 2003: 39.
[25]PARSONS T R, MAITA Y, LALLI C M. A manual of chemical and biological methods for seawater analysis[M]. Oxford: Pergamon Press, 1984: 260-289.
[26]BABIN M, STMMSK D, FERRAR G M, et al.Variations in the light absorption coefficients of phytoplankton, nonalgal particles, and dissolved organic matter in coastal waters around Europe[J]. J Geophys res, 2003, 108: 1-20.
[27]COBLE P, HU C, GOULD R W J R, et al. Colored dissolved organic matter in the coastal ocean: an optical tool for coastal zone environmental assessment and management[J]. Oceanography, 2004, 17: 50-59.
[28]STEDMON C A, MARKAGER S, KAAS H. Optical properties and signatures of chromophoric dissolved organic matter (CDOM) in Danish coastal waters [J]. Estuar Coast Shelf Sci, 2000, 51: 267-278.
[29]ASTORECA R, ROUSSEAU V, LANCELOT C. Coloured dissolved organic matter(CDOM) in Southern North Sea Waters: Optical characterization and possible origin[J]. Estuar Coast Shelf Sci, 2009, 85: 633-640.
[30]KOWALCZUK P, STEDMON C A, MARKAGER S. Modeling absorption by CDOM in the Baltic Sea from season,salinity and chlorophyll[J]. Mar Chem, 2006, 101: 1-11.
[31]KOPELEVICH O V, BURENKOV V I. Relation between the spectral values of the light absorption coefficients of sea water, phytoplanktonic pigments, and the yellow substance[J]. Oceanology, 1977, 17: 278-282.
[32]张运林. 水体中有色可溶性有机物的研究进展[J]. 海洋湖沼通报, 2006, 3: 119-127.
[33]王林, 赵冬至, 杨建洪, 等. 黄海北部CDOM近紫外区吸收光谱特性研究[J]. 光谱学与光谱分析, 2010, 3: 3379-3383.
[34]VODACEK A, BLOUGH N V, DEGRANDPRE M D, et al. Seasonal variation of CDOM and DOC in the middle Atlantic Bight: Terrestrial inputs and photooxidation[J]. Limnol Oceanogr, 1997, 42(4): 674-686.
[35]PIOTROWSKI A M, BANAKAR V K, SCRIVNER A E, et al. Indian Ocean circulation and productivity during the last glacial cycle[J]. Earth Planet Sc Lett, 2009, 285: 179-189.
[36]CHEN R F, BADA J L. The fluorescence of dissolved organic matter in seawater[J]. Mar Chem, 1992, 37: 191-221.
[37]MOORE T S, MATEAR R J, MARRA J, et al. Phytoplankton variability off the Western Australian Coast: Mesoscale eddies and their role in cross-shelf exchange[J]. Deep- Sea Res II, 2007, 54: 943-960.
[38]SWAN C M, SIEGEL D A, NELSON N B, et al. Biogeochemical and hydrographic controls on chromophoric dissolved organic matter distribution in the Pacific Ocean[J]. Deep-Sea Res Ⅰ, 2009, 56: 2175-2192.

热带东印度洋6°N断面有色可溶性有机物(CDOM)光谱吸收特性^*

Spectral absorption properties of colored dissolved organic matter along 6°N transect of tropical eastern Indian Ocean

PDF (PC)

赞

可视化

摘要/Abstract

引用本文

使用本文

参考文献

相关文章 1

Metrics

本文评价

推荐阅读 0