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| 1 | Regional patterns of particulate spectral absorption in the Pearl River estuary显示文摘Spectral absorption coefficients of the total particulate, ap(l ), nonalgal particulate, ad(l ), and phyto-plankton pigment, aph(l ), in the Pearl River estuary and its vicinity waters were determined using the quantitative filter technique. The particulate absorption ap(443) ranged from 0.04 to 1.82 m-1, with the corresponding aph(443) ranging from 0.016 to 0.484 m-1. Two typical spectral patterns are found for the total particulate absorption. For the first typi-cal spectral pattern, the total particulate absorption spectra are similar to that of nonalgal particulate, with values of absorption coefficient decreasing with wavelength. In con-trast, for the second spectral pattern the spectral absorptions by total particulate are very similar to that of phytoplankton pigment. The spectral dependency of absorption by nonalgal particulate follows an exponential increase toward short wavelengths, with an average slope of 0.012±0.002 nm-1. The nonalgal absorption and the fraction of the nonalgal particulate absorption to the total particulate absorption exhibit a distinct trend of decreasing with salinity of the sur-face water. Phytoplankton pigment absorption exhibits a clear trend of increasing nonlinearly with chlorophyll a con-centration. The relationships between the phytoplankton pigment absorption and chlorophyll a concentration can be described by power law, with the determination coefficient r2 of 0.82. But only weak relationships between ap(l ) and chlorophyll a concentration are observed, with the determination coefficient r2 of 0.42. The relatively large scatter around ap(443) versus chl-a relationship would be attributed to the effects of loading of the nonalgal particulate absorption. Our analysis indicated that such relationships similar to that for Case Ⅰ waters can be applicable to optically complex Case Ⅱ waters if the effects caused by nonalgal are corrected. The chlorophyll-specific absorption coefficients of phytoplankton pigment are not constant, it increases with decreasing chlorophyll a level. To improve the accuracy of bio-optical algorithms for remote sensing in coastal waters, further investigations on the variations of specific absorption of chlorophyll pigment must be made. | CAO Wenxi, YANG Yuezhong, XU Xiaoqiang, HUANG Liangmin & ZHANG Jianlin LED Laboratory, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China Correspondence should be addressed to Cao Wenxi (e-mail: wxcao@ scsio.ac.cn) | 2003 | Chinese Science Bulletin2003，48，21： | 24 |
| 2 | 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 |
| 3 | Facile electrodeposition of 3D concentration-gradient Ni-Co hydroxide nanostructures on nickel foam as high performance electrodes for asymmetric supercapacitors显示文摘小说三维(3D ) 集中坡度 Ni 公司氢氧化物 nanostructures (3DCGNC ) 被一个灵巧的逐步的电气化学的免职方法直接在镍泡沫上种了并且强烈地为 supercapacitors 调查同样没有文件夹、没有售票员的电极。基于一种三电极的电气化学的描述技术,获得的 3DCGNC 电极表明了 1,760 F 的一个高特定的电容 ???? | Mingyang Yang Hua Cheng Yingying Gu Zhifang Sun Jing Hu Lujie Cao Fucong Lv Minchan Li Wenxi Wang Zhenyu Wang Shaofei Wu Hongtao Liu Zhouguang Lu | 2015 | Nano Research2015，8，8： | 8 |
| 4 | Carbon Storage Capacity of Different Plantation Types Under Sandstorm Source Control Program in Hebei Province, China显示文摘Afforestation and reforestation are effective and ecological ways of mitigating elevated atmospheric carbon dioxide(CO2) concentration and increasing carbon(C) storage in terrestrial ecosystems. In this study, we measured the above-ground(tree, herbaceous plants and litter) and below-ground(root and soil) C storage in an aspen plantation(Populus davidiana) monoculture(PD), a larch plantation(Larix pincipis-rupprechtii) monoculture(LP), a pine plantation(Pinus tabulaeformis) monoculture(PT), a larch and birch mixed plantation(L. pincipis-rupprechtii and Betula platyphlla mixed)(MLB), and an apricot plantation(Armeniaca sibirica) monoculture(AS) under the Desertification Combating Program in Hebei Province, the northern China. The objective was to assess the effect of afforestation species on ecosystem C pools of different plantation types. Results showed that C storage of LP stand(258.0 Mg/ha) and MLB(163.4 Mg/ha) were significantly higher than the C storage in PD(45.5 Mg/ha), PT(58.9 Mg/ha) and AS(49.4 Mg/ha), respectively. Soil C was the main carbon pool of the ecosystem C storage in the five plantation stands, ranging from 31.4 Mg/ha to 232.5 Mg/ha, which accounted for 69.0%–90.1% of the total ecosystem C storage. The C storage in tree layer was about 5.2%–23.2% of ecosystem C storage. The herbaceous plants and litter layers contained 1.0%–6.0% and 1.5%–3.3% of ecosystem C storage, respectively. Our results suggest that tree species should be incorporated to accurately develop regional C budget of afforestation program, and also imply that substantial differences in ecosystem C stocks among plantation types can facilitate decision making on C management. | SHEN Huitao ZHANG Wanjun YANG Xue LIU Xiuping CAO Jiansheng ZENG Xinhua ZHAO Xin CHEN Xuexun ZHANG Wenxi | 2014 | Chinese Geographical Science2014，24，4： | 3 |
| 5 | Recent progress on chikungunya virus research显示文摘Chikungunya virus(CHIKV) is an arbovirus transmitted by Aedes mosquitos in tropical and subtropical regions across the world. After decades of sporadic outbreaks, it re-emerged in Africa,Asia, India Ocean and America suddenly, causing major regional epidemics recently and becoming a notable global health problem. Infection by CHIKV results in a spectrum of clinical diseases including an acute self-limiting febrile illness in most individuals, a chronic phase of recurrent join pain in a proportion of patients, and long-term arthralgia for months to years for the unfortunate few. No specific anti-viral drugs or licensed vaccines for CHIKV are available so far. A better understanding of virus-host interactions is essential for the development of therapeutics and vaccines. To this end, we reviewed the existing knowledge on CHIKV's epidemiology, clinical presentation, molecular virology, diagnostic approaches, host immune response, vaccine development, and available animal models. Such a comprehensive overview, we believe, will shed lights on the promises and challenges in CHIKV vaccine development. | Wenxi An Ningning Ge Yilin Cao Jin Sun Xia Jin | 2017 | Virologica Sinica2017，32，6： | 2 |
| 6 | A fusion–fission hybrid reactor with water-cooled pressure tube blanket for energy production显示文摘 | Hongchun Wu Tiejun Zu Suizheng Qiu Xinli Gao Youqi Zheng Liangzhi Cao Wenxi Tian | 2012 | Progress in Nuclear Energy2012，，： | 1 |
| 7 | Satellite-observed variability of phytoplankton size classesassociated with a cold eddy in the South China Sea显示文摘 | LIN JUNFANG CAO WENXI WANG GUIFEN 2014 | 2014 | MarinePollution Bulletin2014，83，1： | 1 |
| 8 | Vertical variations in the bio-optical properties of seawater in the northern South China Sea during summer 2008显示文摘Vertical variability in the bio-optical properties of seawater in the northern South China Sea(NSCS)including inherent optical properties(IOPs)and chlorophyll a concentration(Chl)were studied on the basis of in situ data collected in summer 2008 using an absorption/attenuation spectrophotometer.An empirical model was developed to estimate Chl profiles based on the absorption line height at long wavelengths,with a relative root mean square error of 37.03%.Bio-optical properties exhibited large horizontal and vertical spatial variability.As influenced by coastal upwelling and the Zhujiang River(Pearl River)discharge,both IOPs and Chl exhibited high values in the surface waters of the inner shelf,which tended to decrease with distance offshore.Subsurface maximum layers of IOPs and Chl were observed in the middle and outer shelf regions,along with significantly higher values of attenuation coefficients beneath this layer that rapidly increased towards the bottom.In the open ocean,both IOPs and Chl exhibited consistent variability,with the subsurface maximum layer typically located at34–84 m.Phytoplankton were found to be one of the major components in determining the vertical variability of bio-optical properties,with their vertical dynamics influenced by both physical forcing and light attenuation effects.The depth of the subsurface maximum layer was found to be closely related to the fluctuation of the oceanic thermocline and the depth of the euphotic zone,which also affected the total integrated biomass of the upper ocean.Typically high values of attenuation coefficients observed in the bottom waters of the continental shelf reflected the transport of particulate matter over the bottom boundary layer.Our results reveal large spatial differences in bio-optical profiles in response to complex marine ecodynamics in the NSCS.From the perspective of marine research,high-resolution optical measurements are clearly advantageous over conventional bottle sampling. | Guifen Wang Wen Zhou Zhantang Xu Wenlong Xu Yuezhong Yang Wenxi Cao | 2020 | Acta Oceanologica Sinica2020，39，4： | 1 |
| 9 | Assessment of SeaWiFS, MODIS, and MERIS ocean colourproducts in the South China Sea显示文摘 | ZHAO WENJING WANG GUOQING CAO WENXI 2014 | 2014 | International Journal ofRemote Sensing2014，35，1112： | 1 |
| 10 | Effects of ultraviolet radiation B (UV-B) on photosynthesis of natural phytoplankton assemblages in a marine bay in Southern China显示文摘Solar ultraviolet radiation B (UVB) is known to have inhibitive effects on phytoplankton photosynthesis. UVB light decreases rapidly with increasing depth in the water column and exerts different degrees of UVB inhibitive effects on phytoplankton photosynthesis. In this study, the objectives were to quantify effects of UVB on phytoplankton photosynthesis and quantum yield, and to examine UVB effects on phytoplankton photosynthesis when light varies. The insitu experiments were conducted in Da Ya Bay, which is a semienclosed area in the subtropical South China. The results showed a significant reduction of photosynthetic rates and quantum yield in the presence of UVB. Maximum photosynthetic rates (Pmax) and maximum quantum yield (Φmax) were 11%-22% and 17%-49% less under solar radiation with UVB than without UVB. A simplified model was developed to describe the UVB biologically effective fluence rate (E*inh) as an exponential decay function of depth. Light-shift experiments, in which water samples from the surface and at depth of 4 m were divided into several subsamples, and each subsamples were then incubated at different depths with and without UVB in the water column, showed that phytoplankton from the deeper water (4 m) had more inhibitive rates by UVB than that from the surface when exposed to the same light condition. | YUAN XiangCheng YIN KeDong ZHOU WeiHua CAO WenXi XU XiaoQiang ZHAO Di | 2007 | Chinese Science Bulletin2007，52，4： | 1 |
| 11 | Variation of Particulate Organic Carbon and its Relationship with Bio-optical Properties During a Phytoplankton Bloom in the Pearl River Estuary显示文摘 | Wang Guifen Zhou Wen Cao Wenxi | 2011 | Marine Pollution Bulletin2011，62，： | 1 |
| 12 | Optical systems for applications in ocean color remote sens-ing and interdisciplinary study显示文摘 | CAO WENXI YANG YUEZHONG KE TIANCUN | 2003 | SPIE2003，4892，： | 1 |
| 13 | Optical systems for applications in ocean color remote sensing and interdisciplinary study显示文摘 | Cao Wenxi Yang Yuezhong Ke Tiancun | 2003 | SPIE2003，4892，： | 1 |
| 14 | Principal component analysis for ocean color remote sensing in South China Sea显示文摘 | Cao Wenxi Zhong Qiying Yang Yuezhong | | 遥感学报0，，： | 1 |
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