發(fā)布時(shí)間：2018-05-29 12:09

  本文選題：懸浮顆粒物 + Mie散射理論��； 參考：《南京信息工程大學(xué)》2016年碩士論文

【摘要】：海洋水體懸浮顆粒物吸收、散射效率空間分布特征及其影響因素的研究對(duì)于加深水體吸收和散射性質(zhì)的認(rèn)識(shí)、建立生物光學(xué)模型、提高水色遙感反演參數(shù)的精度及海洋環(huán)境監(jiān)測(cè)等具有重要意義。本文基于2014年11月(秋季)和2015年8月(夏季)在黃渤海開展的現(xiàn)場(chǎng)調(diào)查數(shù)據(jù),結(jié)合測(cè)量的黃渤海水體生物、地球、化學(xué)及水體環(huán)境參數(shù)其空間(垂向和表層)分布情況,深入分析了吸收散射效率光譜變化特征、吸收散射效率空間(垂向和表層)分布特征、吸收散射效率與水體組分濃度及懸浮顆粒物成分、粒徑、表觀密度的關(guān)系,揭示了吸收散射效率變化的影響因素。主要結(jié)論如下：1) 吸收散射效率光譜特征方面：吸收效率光譜變化特征與水體中懸浮顆粒物的成分有關(guān)。以無機(jī)顆粒物主導(dǎo)的近岸水體,吸收效率光譜隨波長(zhǎng)增加而減��；以浮游植物主導(dǎo)的遠(yuǎn)岸水體,吸收效率光譜分別在440nm、675nm波長(zhǎng)處出現(xiàn)吸收效率峰值。散射效率光譜特征整體隨波長(zhǎng)變化較小且平緩。短波波段散射效率比長(zhǎng)波處散射效率略高。夏季散射效率較低,秋季較高。2)吸收散射效率空間分布方面：在水平方向上,吸收效率夏季近岸高、遠(yuǎn)岸低；秋季近岸低、遠(yuǎn)岸高。主要是受浮游植物的生長(zhǎng)的影響。水平方向上散射效率近岸高、遠(yuǎn)岸低；秋季散射效率高于夏季。在垂向剖面上,夏季,黃渤海水體整體除具有水平上的近岸高遠(yuǎn)岸低的分布特征外,吸收效率散射效率深淺水域均呈現(xiàn)出明顯的分層結(jié)構(gòu),上層低下層高。秋季,水深50 m以上水域垂向分布較為均勻,水深大于50 m的水體現(xiàn)出明顯的分層結(jié)構(gòu),上層較低且上均勻?qū)由疃容^深下層高。3)吸收散射效率影響因素方面：黃渤海懸浮顆粒物主要受浮游植物生長(zhǎng)、底部沉積物再懸浮以及垂向混合動(dòng)力作用的影響。不同海洋過程引起懸浮顆粒物的類型、成分、大小不同,進(jìn)而光學(xué)吸收散射效率不同。吸收效率主要是受水體中葉綠素濃度、懸浮顆粒物粒徑、粒徑與表觀密度乘積等因素共同影響。各影響因素對(duì)吸收效率的貢獻(xiàn)也各有不同。葉綠素濃度的變化對(duì)吸收效率的貢獻(xiàn)占33%,較渾濁水體中懸浮顆粒物粒徑的變化對(duì)吸收效率的貢獻(xiàn)為37%,表觀密度與粒徑的乘積的變化對(duì)吸收效率的貢獻(xiàn)占14%。散射效率主要是受懸浮顆粒物濃度、粒徑及表觀密度的影響。粒徑的變化對(duì)散射效率變化的貢獻(xiàn)為15%,表觀密度的變化引起散射效率變化的貢獻(xiàn)占20%。
[Abstract]:Study on the Spatial Distribution characteristics of suspended particulate matter absorption, scattering efficiency and its influencing factors in Marine Water body; to deepen the understanding of water absorption and scattering properties, and to establish a biological optical model. It is of great significance to improve the precision of remote sensing inversion parameters and marine environment monitoring. Based on the field survey data in the Yellow Sea and Bohai Sea in November (autumn) and August (summer) 2015, the spatial distribution (vertical and surface) of biological, earth, chemical and environmental parameters in the Yellow Sea and Bohai Sea were measured. The spectral variation characteristics of absorption scattering efficiency, the spatial distribution characteristics of absorption scattering efficiency (vertical and surface), and the relationship between absorption scattering efficiency and water component concentration, suspended particle composition, particle size and apparent density are analyzed. The influence factors of absorption and scattering efficiency are revealed. The main conclusions are as follows: (1) the spectral characteristics of absorption and scattering efficiency are related to the composition of suspended particles in water. The absorption efficiency spectra of inshore water dominated by inorganic particulate matter decreased with the increase of wavelength, and the absorption efficiency spectra of far shore waters dominated by phytoplankton showed peak absorption efficiency at the wavelength of 440 nm ~ 675 nm, respectively. The spectral characteristics of scattering efficiency vary slightly with wavelength. The scattering efficiency of short wave band is higher than that of long wave band. The spatial distribution of absorption scattering efficiency is lower in summer, higher in autumn. 2) in horizontal direction, the absorption efficiency is high in summer, low in far shore, and low in autumn. It is mainly affected by the growth of phytoplankton. The scattering efficiency in the horizontal direction is higher in the near shore and lower in the far shore, and the scattering efficiency in autumn is higher than that in summer. In the vertical section, in summer, the whole water body of the Yellow Sea and Bohai Sea has the characteristics of horizontal distribution of the high and far shore, the absorption efficiency scattering efficiency of the deep and shallow waters are obviously layered structure, the upper layer is low and the lower layer is high. In autumn, the vertical distribution of water depth over 50 m is more uniform, and the water with water depth more than 50 m shows obvious stratification structure. The factors affecting the absorption and scattering efficiency of the upper layer are lower and the depth of the upper homogeneous layer is higher. 3) the suspended particles in the Yellow Sea and Bohai Sea are mainly affected by phytoplankton growth, sediment resuspension at the bottom and vertical mixing dynamics. Different marine processes cause different types, compositions and sizes of suspended particulates, thus the optical absorption and scattering efficiency are different. The absorption efficiency was mainly affected by chlorophyll concentration, particle size, particle size and apparent density product. The contribution of each factor to absorption efficiency is different. The contribution of chlorophyll concentration to absorption efficiency was 33. The contribution of particle size change to absorption efficiency was 37. The contribution of the change of apparent density and particle size product to absorption efficiency was 14%. The scattering efficiency is mainly affected by the concentration, particle size and apparent density of suspended particles. The contribution of particle size change to the change of scattering efficiency is 15. The contribution of the change of apparent density to the change of scattering efficiency is 20%.
【學(xué)位授予單位】：南京信息工程大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2016
【分類號(hào)】：P732;P734.23
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本文編號(hào)：1950830