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| 1 | 太湖梅梁湾水体悬浮颗粒物和CDOM的吸收特性显示文摘通过测定滤膜上悬浮颗粒物和过滤液中CDOM吸光度的方法计算得到太湖梅梁湾总颗粒物和CDOM的光谱吸收系数,并计算了各吸收组份的贡献份额以及吸收与PAR衰减的比值。总颗粒物的吸收系数从400nm到600nm大致呈下降趋势,到675nm附近由于叶绿素a的特征吸收会出现明显峰值,峰值高低随叶绿素4浓度的变化而变化,aρ(440)在3.58-9.86m^-1间变化。非藻类颗粒物和CDOM的吸收随波长增加大致按指数规律下降,αd(440)和αg(440)的变化范围分别为2.23-7.07m^-1和1.06-1.70m^-1。非藻类颗粒物在400—700nm波段的指数函数斜率Sd的平均值为(10.91±0.62)μm^-1;CDOM在280—500nm波段指数函数斜率Sg的平均值为(15.52±0.49)μm^-1。浮游藻类的光谱吸收表现为在440、675nm附近存在两个明显的峰值,分别为(2.55±1.14)、(1.34±0.69)m^-1。ap(440)与TSS、OSS、ISS均存在显著性正相关,而ad(440)则只与TSS、ISS有显著性相关,aph(440)只与OSS、Chla有显著性相关。CDOM吸收系数与DOC浓度没有显著正相关,但与Chla存在显著幂函数关系,浮游藻类降解产物是水体中CDOM的重要来源之一。水体中物质吸收主要以颗粒物为主,对总吸收的贡献率在70%以上,而颗粒物中又以非藻类颗粒物占主导,一般超过加%,总吸收对漫射衰减的贡献也在40%以上。 | 张运林 秦伯强 杨龙元 | 2006 | 生态学报2006，26，12： | 60 |
| 2 | 南海北部水体浮游植物比吸收系数的变化显示文摘在2004年9月南海北部开放航次中测定了51个站点的浮游植物比吸收系数ap*h(λ)。分析表明,ap*h的数值和光谱分布都有较大的变化,且在沿岸和外海表现出不同的变化趋势。ap*h的变化主要受色素打包效应和色素成分的影响。外海水体微微型藻类占绝对优势,而沿岸水体中微型藻类和大型藻类的比例相对增大,相应地色素打包效应增强,ap*h减小。外海水体的ap*h光谱分布随深度的增加呈现出一定的变化趋势,且在上层水体的蓝红比较高,反映出辅助色素含量的相对变化对比吸收系数的影响。ap*h随叶绿素a浓度的增大而减小,两者之间呈现出较好的幂指数关系。 | 王桂芬 曹文熙 许大志 刘胜 张建林 | 2005 | 热带海洋学报2005，24，5： | 35 |
| 3 | Spectral absorption coefficient of phytoplankton and its relation to chlorophyll a and remote sensing reflectance in coastal waters of southern China显示文摘The spectral absorption coefficient of phytoplankton in coastal waters of southern China is investigated. Large variations in the absorption coefficient of phytoplankton are found. The absorption coefficient of phytoplankton at 443 nm ranged from 0.006 m -1 to 0.484 m -1 , with an average value of 0.067 m -1 . The chlorophyll specific absorption coefficient of phytoplankton is also a bio optical variable, with a spectrally averaged value of 0.025 m 2·mg -1 . The variations of chlorophyll specific absorption coefficient are mainly attributed to pigment composition of phytoplankton and package effect. The chlorophyll specific absorption coefficient of phytoplankton decreases with the increasing of chlorophyll a concentration. This relationship can be described by a power law function, with the parameters and the coefficient of determination r 2 as functions of wavelength,but the parameters describing the relationships in present study differed from that in Case 1 waters, thus the regional adjustment of model parameters was of particular significance for improving the accuracy of bio optical algorithms for estimation of Chl a concentration and primary production from remotely sensed data. Regression analysis of reflectance ( R rs ) ratio and absorption coefficient of phytoplankton ( a ph ) indicates a close correlation between them, which means that it is possible to retrieve absorption coefficient of phytoplankton using ocean color remote sensing data in optically complex coastal waters. | CAOWenxi YANGYuezhong LIUSheng XUXiaoqiang YANGDingtian ZHANGJianlin | 2005 | Progress in Natural Science:Materials International2005，15，4： | 24 |
| 4 | 藻类的光谱吸收特征及其混合藻吸收系数的分离显示文摘利用定量滤膜技术测定了实验室培养的聚球藻(Synechococcus 7942)、铜绿微囊藻(Microcystis aeruginosa)、斜生栅藻(Scenedesmus obliquus)、蛋白核小球藻(Chlorella pyrenoidosa)、直链硅藻的吸收光谱(Melosiragranulate Var.angustissima),通过其标准化吸收谱,分析了同种藻不同生长时期的吸收谱特征,并比较分析了不同藻类的标准化吸收谱.结果表明,同一藻的标准化吸收光谱在不同生长时期基本恒定不变.色素组成及其比例的不同是引起藻类间吸收光谱变化的主要原因,同时也是大型浅水湖泊中浮游植物种群演替的原因之一.蓝藻光谱主要存在620nm左右的吸收峰,使得其在水体中较易获取生长所需的光能.直链硅藻在短波范围内稍强的吸收能力被非藻类颗粒物、黄质所弱化,而其在630nm的吸收峰较低,因而难以成为浅水湖泊中的优势种;绿藻在655nm处的吸收肩峰有利于其光能竞争.通过纯种藻的标准化吸收谱,较为成功地对混合藻的吸收谱进行了分离. | 赵巧华 秦伯强 | 2008 | 环境科学学报2008，28，2： | 20 |
| 5 | 太湖水体中悬浮颗粒物的比吸收光谱特性及其参数化分析显示文摘通过对太湖水体的野外采样,利用定量滤膜技术测量了水体中浮游植物色素的吸收系数(aph(λ))和非色素颗粒物的吸收系数(aNAP(λ)),进而推算比吸收系数.同时,对浮游植物色素和非色素颗粒物的比吸收系数的时空变化特征进行了分析.结果表明,浮游植物色素的比吸收系数(ap*h)在蓝光440nm的变化范围为0.008~0.268m2·mg-1,在红光670nm的变化范围为0.004~0.098m·2mg-1;;通过K-Mean算法将浮游植物色素的比吸收光谱分成3种具有不同光谱特征的类型,类别1、2和3占总数的百分比分别为61.0%、12.2%和26.8%,表明太湖水体中浮游植物色素的比吸收光谱是以类别1为主;;色素包裹效应因子Qa*(675)在Chla浓度<50mg·m-3时,随Chla浓度的增大迅速减小,而在Chla浓度>50mg·m-3时,其减小的趋势趋于缓慢,Qa*(675)与Chla浓度呈现出较好的幂函数关系.非色素颗粒物的比吸收系数(aN*AP)在蓝光440nm处的变化范围为0.012×10-3~0.143×10-3m2·mg-1,利用此处的比吸收系数建立的非色素颗粒物比吸收光谱的参数化模型,光谱曲线斜率S的变化范围为0.0049~0.0133nm-1,平均值为(0.0091±0.0029)nm-1.同时,建立的非色素颗粒物的比吸收系数与其浓度的指数函数模型,R2达到0.502. | 孙德勇 李云梅 王桥 吕恒 乐成峰 黄昌春 施坤 | 2009 | 环境科学学报2009，29，9： | 19 |
| 6 | Effect of sediment resuspension on underwater light field in shallow lakes in the middle and lower reaches of the Yangtze River:A case study in Longgan Lake and Taihu Lake显示文摘Based on three continuous in situ underwater light field measurement under different wind waves conditions in Longgan Lake, Meiliang Bay of Taihu Lake in July 2003 and littoral zone near TLLER in July 2004, respectively, the effects of sediment resuspension caused by wind waves on PAR diffuse attenuation, absorption coefficients and euphotic depths are analyzed. In Longgan Lake, PAR diffuse attenuation coefficients during small, middle and large wind waves were 1.74, 2.02 and 2.45 m-1, respectively, and the corresponding PAR spectral diffuse attenuations ranged from 0.98 to 2.97, 1.34 to 3.95 and 1.80 to 5.40 m-1, respectively. In Meiliang Bay, PAR diffuse attenuation coefficients were 2.63, 3.72, 4.37 m-1 during small, middle and large wind waves. PAR diffuse attenuation coefficients increased by 41% and 66% from small to middle, large wind waves, respectively.Absorption coefficients integrated over the range of PAR of CDOM, phytoplankton were 0.26, 0.28 m-1;0.76, 0.49 m-1, respectively during middle and large wind waves. Absorption coefficients integrated over the range of PAR of non-algal particulate matter and total suspended particulate matter increased from 0.94 to 1.73 m-1, and from 1.70 to 2.22 m-1, respectively during middle and large wind waves. Relative contributions of absorption coefficients of non-algal particulate matter to total absorption coefficient integrated over the range of PAR were 44.14%, 65.05%, respectively, during middle and large wind waves. PAR euphotic depths decreased by 0.40, 0.19, 0.20 m from middle to large wind waves in Longganhu Lake, Meliang Bay and littoral zone near TLLER. Significant correlations were found between transparency, PAR diffuse attenuation coefficients, euphotic depths and total suspended particulate matter, wind velocity, wave height. Most significant correlations were found between transparency, PAR diffuse attenuation coefficients, euphotic depths and inorganic suspended particulate matter but low correlations for chlorophyll a, dissolved organic carbon. Increase of total suspended particulate matter, especially inorganic suspended particulate matter caused by wind waves was the dominant factor affecting underwater light field in shallow lakes in the middle and lower reaches of the Yangtze River based on observations at three stations. | ZHANG Yunlin, QIN Boqiang, ZHU Guangwei, GAO Guang, LUO Liancong & CHEN Weimin Nanjing Institute of Geography & Limnology, Chinese Academy of Sciences, Nanjing 210008, China Graduate School of Chinese Academy of Sciences, Beijing 100039, China | 2006 | Science China Earth Sciences2006，49，z1： | 14 |
| 7 | 珠江口颗粒物吸收系数与盐度及叶绿素a浓度的关系显示文摘海水中总颗粒物的吸收系数可表达成非藻类颗粒物与浮游植物的吸收系数之和,利用可定量测量的滤膜技术(QFT)测定水体中颗粒物光谱吸收系数。非藻类颗粒物的吸收系数随着波长的增大而减小,可用指数衰减规律来描述;光谱斜率S较离散,但平均值与文献报道的一类水体S的平均值很接近;光谱截距ad0(λ0)随盐度增大而减小,二者有很好的线性关系。浮游植物的比吸收系数和叶绿素a浓度之间存在非线性关系,但是,比吸收系数与叶绿素a浓度之间的非线性关系同时还与波长有关,在叶绿素a的2个吸收峰443nm和670nm附近非线性关系特别明显,而在530—640nm之间两者的非线性关系则较弱。 | 许晓强 曹文熙 杨跃忠 | 2004 | 热带海洋学报2004，23，5： | 13 |
| 8 | 南海北部藻类粒级结构及色素成分对浮游植物吸收系数的影响显示文摘在珠江口、广东沿岸及南海北部三个航次生物-光学数据的基础上,研究了色素打包效应和色素成分的变化对浮游植物吸收系数的影响,结果表明,两种因素对吸收系数都有较大的贡献,但在不同的水体它们的影响程度各有不同.对网采浮游植物含量较高的珠江口和广东沿岸的水体而言,色素打包效应较强,对675 nm处比吸收系数的贡献平均分别为40%和20%;对微型浮游植物占主导地位的南海北部航次的水体,打包效应较弱,对675 nm处比吸收系数的影响平均仅为6%.采用多元线性回归的方法对吸收光谱进行分析,发现除叶绿素a之外的辅助色素对吸收系数的贡献主要表现在蓝绿光波段,三个航次440 nm波长处对总吸收的贡献平均分别为44%,43%和53%,其中对珠江口和广东沿岸航次的水体主要是光合类胡萝卜素的吸收贡献,而对南海北部航次的水体除了光合类胡萝卜素以外还要受到光保护类胡萝卜素的影响.由于河口、近岸和外海水体藻类粒级结构和辅助色素成分对浮游植物吸收系数的贡献有明显的差异,在南海北部水体建立比较精确的生物光学模型时,需考虑藻类粒级结构及色素成分对浮游植物吸收系数的影响. | 王桂芬 曹文熙 许大志 杨跃忠 | 2007 | 海洋学报2007，29，1： | 11 |
| 9 | Variability of phytoplankton absorption in the northern South China Sea:influence of the size structure and pigment composition of algal populations显示文摘Data from three cruises conducted in the Zhujiang River (ZR), coastal waters of Guangdong (CWGD) and the northern South China Sea (NSCS) during 2003 and 2004 were examined for assessing the relative importance of pigment composition and packaging effect in modifying the specific absorption coefficients of phytoplankton. The three survey regions differ widely in their phytoplankton community with large cells dominating the ZR and CWGD waters and small cells dominating the NSCS region. Variations in the size structure and the accessory pigments have much effect on the chlorophyll a-specific absorption coefficient of phytoplankton. The size index accounted for about 42% and 33% of the variation of the specific absorption coefficient at 440 and 675 nm, respectively. Using the multiple regression analysis approach, pigment concentrations for each sample were calculated. The accessory pigments other than chlorophyll a contribute to absorption mainly in the blue-to-green region of the spectrum and their absorptions account for about 44%, 43% and 53% on the average of the total phytoplankton absorption at 440 nm for the ZR, CWGD and NSCS regions. Among the accessory pigments, the photosynthetic carotenoids (noted PSC) play a dominant role in the ZR and CWGD waters, while in the NSCS the nonphotosynthetic carotenoids (noted PPC) as well as PSC have important contributions. Because the variations of both the size structure and accessory pigments in algal populations contributed to the variability of the specific absorption coefficient in the study regions, these factors may be considered explicitly in future bio-optical algorithms to derive chlorophyll a concentration more accurately. | WANG Guifen CAO Wenxi XU Dazhi YANG Yuezhong | 2007 | Acta Oceanologica Sinica2007，26，2： | 9 |
| 10 | 基于南海北部海区浮游植物吸收光谱斜率变化的粒级结构反演显示文摘浮游植物的粒级结构是一个重要的生物参数。基于南海北部海区不同水体环境下测量的生物光学数据,作者深入研究了粒级结构对浮游植物吸收光谱的影响。结果表明,选择443和510nm波段计算得到的浮游植物光谱斜率S对粒级结构的变化具有较高的敏感性,其随着小型浮游植物比例的增大呈不断增加的趋势。S与水体叶绿素a浓度、浮游植物吸收系数(aph(443))之间表现出明显的正相关特征。以40%为界对不同粒级浮游植物的优势进行定义,发现在S与叶绿素a浓度、aph(443)的关系分布中小型(Micro)和微微型(Pico)浮游植物占据优势的水体表现出较为明显的分界,叶绿素a浓度和aph(443)分别在0.70mg·m-3和0.05m-1附近,相应的S在0.0004(m·nm)-1左右。基于实测数据建立的遥感反射率蓝绿波段比值与S之间的统计关系,决定系数高达0.91,为从水色遥感数据反演浮游植物粒级结构提供了重要手段。 | 王桂芬 曹文熙 周雯 梁少君 杨跃忠 赵俊 | 2010 | 热带海洋学报2010，29，2： | 8 |
| 11 | 水体各组分吸收系数的测量方法研究显示文摘主要综述了水体水色组分吸收系数的测定方法。其中有色可溶性有机物采用0.22μm聚碳酸酯滤膜过滤后的过滤清液在分光光度计上测定换算得到。总颗粒物吸收系数采用定量滤膜技术得到,并总结了文献中各种光程放大因子β的校正方法。综合分析了甲醇浸泡提取法、次氯酸钠漂白法和数值分离法区分浮游藻类、非藻类颗粒物吸收的原理、操作方法和优缺点。最后对水体组分光谱吸收的典型特征进行了讨论。 | 王鑫 张运林 赵巧华 | 2007 | 安全与环境学报2007，7，4： | 7 |
| 12 | 基于浮游植物吸收光谱提取粒径参数显示文摘在南海北部、大亚湾及珠江口3个不同水体生物-光学数据的基础上,研究了浮游植物粒径结构的变化特征,建立了基于浮游植物吸收光谱提取的浮游植物粒径参数(S)的混合光谱模型。南海海区不同的水体环境下浮游植物的粒级结构有着很大的差异:在河口和沿岸水体小型浮游植物占优势,在外海水体微微型浮游植物占优势。浮游植物粒径参数随小型浮游植物增多而减少,随微微型浮游植物增多而增大。叶绿素a浓度从外海到沿岸逐渐增大,浮游植物粒径参数随叶绿素a浓度的增大而减小,它们之间呈幂函数关系。结果表明,利用混合光谱模型得到的浮游植物粒径参数与南海海区不同水体的生物-光学特征(粒级结构Rpico和Rmicro、粒级指数SI、叶绿素a浓度)有一定的相关性。具体的相关性表示为:S与粒级结构(Rpico和Rmicro)存在一定的关系,与小型浮游植物和微微型浮游植物之间的线性相关系数分别是0.55和0.65;S与浮游植物粒级指数(SI)有较好的线性关系,相关系数是0.57;S与叶绿素a浓度呈幂函数关系,相关系数是0.64。这个混合光谱模型为从光学参数反演浮游植物种群的生态学信息提供了有效的手段,同时又可用于分析浮游植物优势粒径结构对光学特性的影响。 | 梁少君 曹文熙 王桂芬 周雯 赵俊 孙兆华 | 2010 | 热带海洋学报2010，29，2： | 6 |
| 13 | 用多层感知器模型由吸收光谱反演浮游植物色素显示文摘浮游植物吸收光谱已逐渐成为高光谱水色遥感的可获取参量。文章采用了多层感知器模型,由珠江口担杆群岛附近水体的浮游植物吸收光谱进行了色素浓度的反演,感知器的输入量是浮游植物吸收光谱,输出量分别对应叶绿素a、叶绿素b、叶绿素c、光保护类胡萝卜素和非光保护类胡萝卜素五大类主要色素的浓度。分析结果表明,叶绿素a和叶绿素c估算结果的平均相对偏差比较低,在测试数据集中两者的偏差分别为19.06%和15.90%;光保护类胡萝卜素和非光保护类胡萝卜素的估算浓度的相对偏差比较高,对于测试数据而言,分别为37.62%和36.96%;叶绿素b浓度在测试数据集中的估算相对偏差约为27.47%。五大类色素在测试数据集和训练数据集的估算偏差比较接近,已训练好的多层感知器可用于担杆岛水体中色素信息的反演。同时,此色素反演方法也为遥感监测水体浮游植物种群动态提供了重要的手段。 | 周雯 曹文熙 王桂芬 梁少君 赵俊 孙兆华 | 2010 | 热带海洋学报2010，29，2： | 5 |
| 14 | Phytoplankton size class derived from phytoplankton absorption and chlorophyll-a concentrations in the northern South China Sea显示文摘A previously developed model was modified to derive three phytoplankton size classes (micro-, nano-, and pico-phytoplankton) from the overall chlorophyll-a concentration, assuming that each class has a specific absorption coefficient. The modified model performed well using in-situ data from the northern South China Sea, and the results were reliable and accurate. The relative errors of the size-fractioned chlorophyll-a concentration for each size class were: micro-:21%, nano-:41%, pico-:26%, and nano+pico:23%. The model was then applied on ocean color remote sensing data to examine the distribution and variation of phytoplankton size classes in northern South China Sea on a large scale. | 王国青 曹文熙 王桂芬 周雯 | 2013 | Chinese Journal of Oceanology and Limnology2013，31，4： | 5 |
| 15 | 暴雨事件对千岛湖CDOM及颗粒物吸收光谱特征的影响显示文摘为了研究暴雨事件对千岛湖有色可溶性有机物(CDOM)和颗粒物吸收光谱的影响,利用2016年暴雨前(3月1-6日)和暴雨后(4月6-11日)采集的水样,对暴雨前、后千岛湖水体CDOM、浮游藻类和非藻类颗粒物的吸收光谱特征进行分析,探讨暴雨事件对其造成的影响.结果表明:千岛湖作为典型的深水型内陆湖泊,其CDOM、浮游藻类颗粒物和非藻类颗粒物的吸收强度较太湖等浅水型湖泊弱.暴雨前,CDOM光谱吸收系数aCDOM(λ)值在0~0.6 m-1范围内变化,其光谱拟合系数SCDOM的均值为0.0158±0.00145 nm-1.暴雨前浮游藻类光谱吸收在总颗粒物中占主导,aph(λ)在0~0.35m-1范围内变化,非藻类颗粒物光谱吸收系数aNAP(λ)在0~0.15 m-1范围内变化,其光谱拟合系数SNAP均值为5.62±0.57μm-1;暴雨后CDOM光谱吸收系数aCDOM(λ)值在0~1.6 m-1范围内变化,其光谱拟合系数SCDOM的均值为0.0157±0.00101 nm-1.暴雨后浮游藻类光谱吸收系数aph(λ)在0~2.5 m-1范围内变化,非藻类颗粒物光谱吸收在部分区域已占据主导地位,aNAP(λ)在0~0.8 m-1范围内变化,其光谱拟合系数SNAP均值为5.72±0.68μm-1.由CDOM吸收特征值相对分子质量M值得出,暴雨前、后千岛湖不同区域CDOM组成都以富里酸为主,且暴雨前M值分布较均匀,暴雨后M值呈现从新安江向缓冲区、东南区递增的趋势,这说明西北区随暴雨输入的腐殖酸增加了CDOM的相对分子质量.暴雨对SNAP值影响较大的区域为西北区、西南区、东北区,对西南区影响最小.本研究为使用光学手段深入探讨暴雨事件对千岛湖水环境的影响提供重要依据. | 石亮亮 毛志华 刘明亮 张艺蔚 | 2018 | 湖泊科学2018，30，2： | 3 |
| 16 | A preliminary study of the variation of phytoplankton absorption coefficients in the northern South China Sea显示文摘The temporal and spatial variabilities of phytoplankton absorption coefficients (a ph (λ)) and their relationships with physical processes in the northern South China Sea were examined, based on in situ data collected from two cruise surveys during May 14 to 25, 2001 and November 2 to 21, 2002. Significant changes in the surface water in a ph values and B/R ratios (a ph (440)/a ph (675)) were observed in May, which were caused by a phytoplankton bloom on the inner shelf stimulated by a large river plume due to heavy precipitation. This is consistent with the observed one order of magnitude elevation of chlorophyll a and a shift from a pico/nano dominated phytoplankton community to one dominated by micro-algae. Enhanced vertical mixing due to strengthened northeast monsoon in November has been observed to result in higher surface a ph (675) (0.002–0.006 m-1 higher) and less pronounced subsurface maximum on the outer shelf/slope in November as compared with that in May. Measurements of a ph and B/R ratios from three transects in November revealed a highest surface a ph (675) immediately outside the mouth of the Zhujiang (Pearl) River Estuary, whereas lower a ph (675) and higher B/R ratios were featured in the outer shelf/slope waters, demonstrating the respective influence of the Zhujiang River plume and the oligotrophic water of the South China Sea. The difference in spectral shapes of phytoplankton absorption (measured by B/R ratios and bathochromic shifts) on these three transects infers that picoprocaryotes are the major component of the phytoplankton community on the outer shelf/slope rather than on the inner shelf. A regional tuning of the phytoplankton absorption spectral model (Carder et al., 1999) was attempted, demonstrating a greater spatial variation than temporal variation in the lead parameter a 0 (λ). It was thus implicated that region-based parameterization of ocean color remote sensing algorithms in the northern South China Sea was mandatory. | WU Jingyu HONG Huasheng SHANG Shaoling DAI Minhan LEE Zhongping LI Shaojing | 2009 | Acta Oceanologica Sinica2009，28，5： | 2 |
| 17 | 基于叶绿素a浓度的珠江口感潮河段咸潮监测研究显示文摘依据实测资料研究了珠江口最主要的感潮河段沙湾-虎门水道和磨刀门水道水体的叶绿素浓度、盐度的高光谱特征及其空间变化趋势。结果表明:水体叶绿素a浓度和反射率波段比值有较好的相关关系,最佳关系在R704/R513处,r=0.92;在盐度大于2‰的情况下,随着盐度增加叶绿素a浓度逐渐降低,并且向伶仃洋方向随着盐度的增加叶绿素a浓度是递减的。在珠江沙湾-虎门以及磨刀门感潮河段,水体表面盐度与叶绿素a浓度之间表现为较好的负相关关系,表明可以用叶绿素a浓度来推定咸潮的入侵情况。因此,通过遥感图像反演出水体的叶绿素a浓度进而推断珠江口河网区的咸潮入侵空间变化是可能的。 | 方立刚 陈水森 李宏丽 | 2010 | 安徽农业科学2010，38，30： | 2 |
| 18 | 春季太湖梅梁湾水体中藻类光量子产额的变化规律显示文摘藻类光量子产额是表征藻类对环境因素响应的重要参数之一。利用中国科学院太湖生态网络站栈桥头测定的水体初级生产力及水下辐照度数据,计算了4个观测时段藻类的光量子产额,结果表明,自表层至30cm处,藻类的光量子产额随深度基本呈现线性增加的趋势,但随深度的进一步增加,光量子产额增加的趋势变缓,直至接近于平直状态(在到60~80cm之间),该最大值也基本为0.12mol(O2)/mol(光子),且该处的光量子产额是表层的10倍左右。春季,在太湖梅梁湾60cm以上,光并不是藻类生长的限制条件,而在60cm以下,由于光的衰减,使得光成为限制其光合作用的条件。 | 赵巧华 秦伯强 | 2009 | 生态学报2009，29，9： | 2 |
| 19 | 太湖水体介质吸收有效光合辐射能量的谱特征及其季节变化显示文摘针对2005年8月、11月及2006年2月、5月太湖31个采样点的水样,测定了其中黄质(chromophoric dissolved organicmatter)和颗粒物的吸收系数.通过次氯酸钠漂白法及数值分离法,将颗粒物吸收系数分离为藻类颗粒物及非藻类颗粒物的吸收系数,并对2种结果进行了比较.同时分析了太湖水体介质吸收有效光合辐射能量的谱特征及其季节变化.结果表明,水体中的绝大部份光合有效辐射能量主要由黄质和非藻类颗粒物所获取,对夏季的400-473nm、秋季的400-461nm、冬季的400-476nm、春季的400-569nm的能量而言,黄质的吸收贡献大于非藻类颗粒物;而在其余波段中,非藻类颗粒物的吸收贡献相对较大.藻类颗粒物的吸收贡献谱在490nm、676nm左右处存在2个主峰区,620nm左右处存在一次峰区,且该次峰在夏、秋季尤为明显,春季次之,冬季最小.藻类的吸收贡献也呈现出较为明显的季节特征,夏季吸收贡献最大达到22.1%,平均为16.4%;秋季最大为18.4%,平均为13.1%;春季最大为15.1%,平均为9.7%;冬季最大为10.1%,平均为6.8%.由于太湖颗粒物的吸收系数主要由非藻类颗粒物决定,因而用次氯酸钠漂白法从中提取藻类颗粒物的吸收系数会造成较大的误差,而改进的数值分离法在此基础上有了一定的提高. | 赵巧华 秦伯强 | 2008 | 环境科学学报2008，28，9： | 1 |
| 20 | 基于支持向量机模型反演浮游植物粒级结构显示文摘文章采用支持向量机模型反演浮游植物的粒级结构。模型的输入量为浮游植物的吸收光谱、总叶绿素a浓度值。将该模型分别应用于南海数据集和NASA bio-Optical Marine Algorithm Dataset(NOMAD)全球大洋数据集。以浮游植物的吸收光谱做为输入向量时,南海数据集和NOMAD数据集反演微微型(pico)、微型(nano)和小型(micro)粒级浮游植物的平均绝对误差(APD)分别是46.1%、61.6%、55.0%和36.3%、44.6%、43.3%;决定系数(R2)分别为0.604、0.423、0.491和0.460、0.702、0.829。以浮游植物的吸收光谱和总叶绿素a浓度值做为输入向量时,南海数据集和NOMAD数据集反演pico、nano和micro粒级的平均绝对误差分别是19.2%、31.9%、31.6%和35.3%、35.4%、38.2%;决定系数分别为0.837、0.805、0.600和0.713、0.758、0.810。结果显示以吸收光谱和总叶绿素a浓度值作为输入变量的反演精度,比以吸收光谱作为输入变量的反演精度高。由此看出支持向量机模型对于两个数据集的反演结果很理想,该模型的提出为多光谱遥感反演浮游植物的粒级结构提供一个重要手段。 | 姚林杰 曹文熙 王桂芬 许占堂 胡水波 周雯 李彩 | 2015 | 热带海洋学报2015，34，4： | 1 |
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