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

Abstract

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

CLC Number:

P724

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.

References

[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.

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

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