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| 1 | Composition of algal pigments in surface freshen layer after ice melt in the central Arctic显示文摘Seasonal meltwater input creates a thin freshen layer in surface seawater under ice,which largely shifts the algae assemblages.Our recent observation of photosynthetic pigments in the high Arctic showed that ice bottom and 5m of seawater under ice contained relatively high concentration of fucoxanthin,while chlorophyll b and lutein were the major diagnostic pigments in ice-water interface and 0 m of seawater under ice.Additionally,a notable change of dominant phytoplankton occurred in the top 5 m of seawater under ice,from chlorophytes-dominated at surface to diatoms-dominated at 5 m depth,which might attribute to the sharp salinity gradient(salinity from12.5 to 28.1) in the surface seawater under ice.Our results imply that phytoplankton community in surface layer under ice would become more chlorophytes in the future warming Arctic Ocean. | ZHUANG Yanpei JIN Haiyan GU Fan ZHANG Yang BAI Youcheng JI Zhongqiang LU Yong CHEN lianfang | 2017 | Acta Oceanologica Sinica2017，36，8： | 6 |
| 2 | Variations in organic carbon loading of surface sediments from the shelf to the slope of the Chukchi Sea,Arctic Ocean显示文摘The content of organic carbon(OC) normalized to the specific surface area(SSA) of sediment is widely used to trace variations in OC loading(OC/SSA).This study presents observations of OC/SSA of surface sediments collected in the Chukchi Sea,a typical Arctic marginal sea.Shelf sediments exhibit much higher OC/SSA values than slope sediments in the study area.Compared with OC/SSA values reported from the East Siberian Shelf and Mackenzie River,the slope sediments possess lower OC loading.This abrupt decrease in OC/SSA is mostly related to the lower primary production on slope as well as possible oxidization processes.The results of linear regression analysis between OC and SSA indicate a sedimentary source rock for the OC in the Chukchi Sea sediments.Moreover,shelf sediments with low SSA possess a larger rock OC fraction than slope sediments do.The dataset of the present study enables a more thorough understanding of regional OC cycling in the Chukchi Sea. | LI Zhongqiao WANG Xinyi JIN Haiyan JI Zhongqiang BAI Youcheng CHEN Jianfang | 2017 | Acta Oceanologica Sinica2017，36，8： | 6 |
| 3 | Sources and distribution of sedimentary organic matter along the northern Bering and Chukchi Seas显示文摘In this study, lignin-derived phenols were used to determine the sources and distribution of sedimentary organic matter along the northern Bering Sea and Chukchi Sea of the Arctic Ocean. The lignin parameter syringyl/vanillyl(S/V) and cinnamyl/vanillyl(C/V) ratios are used to indicate vegetation sources; and the ratios of vanillic acid/vanillin,(Ad/Al)v and syringic acid/syringaldehyde,(Ad/Al)s are used as indicators of lignin diagenesis. Results showed the predominance of woody gymnosperm signal at the easternmost location in the northern Bering Sea, a mixture of refractory non-woody angiosperm and fresher gymnosperm tissues in the Chukchi Sea, and signal of fresher woody gymnosperm tissues in the northernmost locations in the Chukchi Sea. The lignin materials showed gradual increase in decomposition stage during transport along the northern Bering Sea. Hydrodynamic sorting process, which is the retention of coarser materials nearshore and transportation of finer particles farther offshore, most probably occurred along the east coast of the northern Bering Sea. In Chukchi Sea, the non-woody angiosperm tissues could have originated from the Canadian Arctic and gymnosperm tissues could be from the Russian Arctic side. The fresher materials in the northernmost Chukchi Sea could have been transported here via the ice-rafting process.Detection of fresh lignin materials and the occurrence of lignin decomposition mean that this region could be sensitive to the impact of climate change. | Fanglu Xu Haiyan Jin Zhongqiang Ji Jianfang Chen Pei Sun Loh | 2017 | Journal of Environmental Sciences2017，29，2： | 4 |
| 4 | Grain size composition and transport of sedimentary organic carbon in the Changjiang River(Yangtze River) Estuary and Hangzhou Bay and their adjacent waters显示文摘Surface sediments from the Changjiang River(Yangtze River) Estuary,Hangzhou Bay,and their adjacent waters were analyzed for their grain size distribution,organic carbon(OC) concentration,and stable carbon isotope composition(δ13C).Based on this analysis,about 36 surface sediment samples were selected from various environments and separated into sand(>0.250 mm,0.125–0.250 mm,0.063–0.125 mm) and silt(0.025–0.063 mm)fractions by wet-sieving fractionation methods,and further into silt-(0.004–0.025 mm) and clay-sized(<0.004mm) fractions by centrifugal fractionation.Sediments of six grain size categories were analyzed for their OC andδ13C contents to explore the grain size composition and transport paths of sedimentary OC in the study area.From fine to coarse fractions,the OC content was 1.18%,0.51%,0.46%,0.42%,0.99%,and 0.48%,respectively,while theδ13C was –21.64‰,–22.03‰,–22.52‰,–22.46‰,–22.36‰,and –22.28‰,respectively.In each size category,the OC contribution was 42.96%,26.06%,9.82%,5.75%,7.09%,and 8.33%,respectively.The OC content in clay and fine silt fractions(<0.025 mm) was about 69.02%.High OC concentrations were mainly found in offshore modern sediments in the northeast of the Changjiang River Estuary,in modern sediments in the lower estuary of the Changjiang River and Hangzhou Bay,and in Cyclonic Eddy modern sediments to the southwest of the Cheju Island.Integrating the distribution of terrestrial OC content of each grain size category with the δ13C of the bulk sediment indicated that the terrestrial organic material in the Changjiang River Estuary was transported seaward and dispersed to the Cyclonic Eddy modern sediments to the southwest of the Cheju Island via two pathways:one was a result of the Changjiang River Diluted Water(CDW) northeastward extending branch driven by the North Jiangsu Coastal Current and the Yellow Sea Coastal Current,while the other one was the result of the CDW southward extending branch driven by the Taiwan Warm Current. | ZHANG Weiyan JIN Haiyan YAO Xuying JI Zhongqiang ZHANG Xiaoyu YU Xiaoguo ZHANG Fuyuan GAO Aigen | 2015 | Acta Oceanologica Sinica2015，34，10： | 3 |
| 5 | Hydrogen isotopes in palmitic and stearic acids in suspended particles from the Changjiang River Estuary显示文摘在类脂化合物 biomarkers 的氢同位素能在 hydrologic 周期跟踪过去的变化。最近的研究为重建的份量上在 microalgal 类脂化合物揭示了氢同位素的潜力水 2 H (D) 价值和咸度。在这研究,我们从 Changjiang 河河口(CRE ) 沿着一个咸度坡度收集了推迟的粒子,并且在这些粒子在丰满的酸测量了 D 价值。结果显示水的 D 价值从 CRE 与咸度高度被相关,与从另外的河口的结果一致。在十六酸酸和硬脂的酸的 D 价值从 CRE 与水的 D 价值有积极关联。在 CRE,当咸度增加了,不过,在相对水的丰满的酸的氢同位素分别增加了,在在有在 microalgal 文化和领域研究发现的咸度的氢同位素分别的趋势对面。当咸度增加了点亮可获得性,我们在氢同位素分别归因增加,它在在河口的结束混合地区的粒子富人是多半更低的,并且潜在地也到在 CRE 的丰满的酸的多重来源。 | XING Lei Julian P.SACHS ZHANG HaiLong LI Li JI ZhongQiang ZHAO MeiXun | 2016 | Science China Earth Sciences2016，59，5： | 3 |
| 6 | Response of phytoplankton community to different water types in the western Arctic Ocean surface water based on pigment analysis in summer 2008显示文摘Nutrients and photosynthesis pigments were investigated in the western Arctic Ocean during the 3rd Chinese Arctic Research Expedition Cruise in summer 2008.The study area was divided into five provinces using the Kmeans clustering method based on the physical and chemical characteristics of the sea water,and to discuss the distribution of the phytoplankton community structure in these provinces.CHEMTAX software was performed using HPLC pigments to estimate the contributions of eight algal classes to the total chlorophyll a(TChl a).The results showed that on the Chukchi Shelf,the Pacific Ocean inflow mainly controlled the Chl a biomass and phytoplankton communities by nutrient concentrations.The high nutrient Anadyr Water and Bering Shelf Water(An W and BSW) controlled region have high Chl a levels and the diatom dominated community structure.In contrast,in the region occupied by low-nutrient like Alaska Coastal Water(ACW),the Chl a biomass was low,with pico-and nano-phytoplankton as dominated species,such as prasinophytes,chrysophytes and cryptophytes.However,over the off-shelf,the ice cover condition which would affect the physical and nutrient concentrations of the water masses,in consequence had a greater impact on the phytoplankton community structure.Diatom dominated in ice cover region and its contribution to Chl a biomass was up to 75%.In the region close to the Mendeleev Abyssal Plain(MAP),controlled by sea-ice melt water with relatively high salinity(MW-HS),higher nutrient and Chl a concentrations were found and the phytoplankton was dominated by pico-and nano-algae,while the diatom abundance reduced to 33%.In the southern Canada Basin,an ice-free basin(IfB) with the lowest nutrient concentrations and most freshened surface water,low Chl a biomass was a consequence of low nutrients.The ice retreating and a prolonged period of open ocean may not be beneficial to the carbon export efficiency due to reducing the Chl a biomass or intriguing smaller size algae growth. | JIN Haiyan ZHUANG Yanpei LI Hongliang CHEN lianfang GAO Shengquan JI Zhongqiang ZHANG Yang | 2017 | Acta Oceanologica Sinica2017，36，8： | 2 |
| 7 | Potential relationships between atmospheric particulate matter transported by winter monsoons and red tides in the East China Sea显示文摘Combining numerical diagnosis from atmospheric science with biogeochemical methods,a model of the potential correlation of monsoons with red tide emergence in the East China Sea is constructed.The model is designed based on an in-depth investigation of the time-space relationship of aerosol and red tide events in the East China Sea from 2005 to 2006,and a continuous monitoring of atmospheric particulates at two stations.The study shows that every red tide event investigated has a close relationship with aerosols coming from the northwest (wind direction in winter) along with subsidence flow.The elemental abundance of total suspended particulate in Hangzhou and Tiantai is different from that of soil background levels,indicating atmospheric particulates there are brought in by winter winds.There is a significant correlation between the content of iron and phosphorous in atmospheric particulates,which mainly exist in binding materials between particulates.In addition,the confined absorption of iron and phosphorous by red tides is related to the intensity of sunlight.These results provide new information regarding the mechanism for the high frequency of red tides in the East China Sea.The results also provide a scientific basis for establishing new pathways for pre-warning and forecasting of red tide disasters. | WENG HuanXin TIAN RongXiang JI ZhongQiang YU XinAn | 2011 | Chinese Science Bulletin2011，56，3： | 2 |
| 8 | Preparation of Pd -B/γ-Al2O3 amorphous catalyst for the hydrogenation of tricyclopentadiene 显示文摘 | Ji -jun Zou Zhongqiang Xiong Li Wang | 2007 | Journal of Molecular Catalysis A : Chemical2007，271，12： | 1 |
| 9 | Interannual Variations of Phytoplankton, Zooplankton and Chlorophyll a in the Arctic Seas and Their Relations to ENSO and AO显示文摘To study effects of variations in climate-marine environment in the Arctic Ocean on ecology,based on the actual and reestablished data by biomarkers of algae in sediment in 1997,1999,2003,2008,and 2010,the interannual and spatial variations of phytoplankton,zooplankton and chlorophyll a concentration in the Chukchi Sea and the Bering Sea as well as their relations to El Nino-Southern Oscillation( ENSO) and Arctic Oscillation( AO) were analyzed. The results show that there were spatial and temporal anomalies in the phytoplankton community structure reestablished by biomarkers of algae in the Chukchi Sea and the Bering Sea in 1999 and 2010. The total content of biomarkers( brassicasterol,dinosterol,C37 alkenones and chlesterol) in sediment collected in 2010 was far lower than that in 1999,but brassicasterol was dominant in the two years,that is,diatom was dominant,which was consistent with the actual structure and distribution of phytoplankton community in 1999 and 2010; there were great changes in the dominant species of plankton in the two seas in 1999 and 2010,which could be regarded as the ecological response of the North Pole under the background of global warming. Chlorophyll a concentration in the water of the Bering Sea was 0. 720 μg/dm^3 at 0 m and 0. 765μg/dm^3 at 10 m in 1997 and 0. 723 μg/dm^3 at 0 m and 0. 731 μg/dm^3 at 10 m in 2003,and the concentration was very close to each other,which was affected by El Ni1 o and the negative phase of AO. It was 0. 395 μg/dm^3 at 0 m in 1999 and 0. 399 μg/dm^3 at 0 m and 0. 357 μg/dm^3 at 10 m in 2008,which was influenced by La Ni1 a and the positive phase of AO. The phases and intensity of AO and ENSO had various effects on the quantity and dominant species of phytoplankton and zooplankton in the Chukchi Sea and the Bering Sea. During the period of AO with positive or negative phase and El Ni1o( in 1997 and 2003),their combination was favorable to the growth of phytoplankton and zooplankton,while the combination of negative phase of AO and La Nina( in 2010) had adverse effects on the growth of phytoplankton. The combination of AO with positive phase and strong La Nina( in 1999 and 2008) had small effects on phytoplankton community. | Zhang Haisheng Chen Jianfang Han Zhengbing Ji Zhongqiang Xu Xudan Han Xibing Liu Zilin Peter, H.-U Vetter Walter | 2017 | Meteorological and Environmental Research2017，8，2： | 1 |
| 10 | Seawater nutrient and chlorophyll α distributions near the Great Wall Station, Antarctica显示文摘We examined the influences upon nutrient, temperature, salinity and chlorophyll a distributions in Great Wall Cove(GWC) and Ardley Cove(AC), near the Chinese Antarctic Great Wall Station, using measurements taken in January 2013 and other recent data. Nutrient concentrations were high, with phosphate concentrations of 1.94(GWC) and 1.96(AC) μmol·L-1, DIN(dissolved inorganic nitrogen) concentrations of 26.36(GWC) and 25.94(AC) μmol·L-1 and silicate concentrations of 78.6(GWC) and 79.3(AC) μmol·L-1. However, average concentrations of chlorophyll a were low(1.29 μg·L-1, GWC and 1.08 μg·L-1, AC), indicating that this region is a high-nutrient and low-chlorophyll(HNLC) area. Nutrient concentrations of freshwater(stream and snowmelt) discharge into GWC and AC in the austral summer are low, meaning freshwater discharge dilutes the nutrient concentrations in the two coves. Strong intrusion of nutrient-rich water from the Bransfield Current in the south was the main source of nutrients in GWC and AC. Low water temperature and strong wind-induced turbulence and instability in the upper layers of the water column were the two main factors that caused the low phytoplankton biomass during the austral summer. | GAO Shengquan JIN Haiyan ZHUANG Yanpei JI Zhongqiang TIAN Shichao ZHANG Jingjing CHEN Jianfang | 2015 | Advances in Polar Science2015，26，1： | 1 |
| 11 | Distribution and Sources of Organic Matter in Surface Sediments of the Northern Bering and Chukchi Seas by Using Bulk and Tetraether Proxies显示文摘The organic matter (OM) preserved in Arctic Ocean sediments is of great importance to the global carbon budget. How-ever, works that apply multiple proxies to determine the distribution and concentration of organic carbon (OC) in the surface sedi-ments of the northern Bering and Chukchi Seas remain limited. Here a multiproxy approach based on bulk OM parameters and the branched vs. isoprenoid tetraether (BIT) index was used to investigate the distribution and sources of OM in the surface sediments of the northern Bering and Chukchi Seas. Binary and ternary mixing models were applied to trace the contribution of different OC sources to the total OC in the study area. The δ13C values of the sediments provided by the binary model showed that the proportion of terrestrial OC fell in the range of 27.4%–79.8% (46.2% on average). The BIT index returned the lowest fraction (4.8%–27.3%, 12.0% on average). The ternary mixing model was employed to determine the plant-, soil-, and marine-derived fractions of the total OM. The ternary model showed that 11.5%±6.3%, 31.4%±9.5%, and 57.1%±12.4% of OM in the sediment of the study area was derived from soil, plants, and marine sources, respectively. The differences in OM composition between the west and east sides of the Chukchi Sea were controlled by OM inputs from key water masses (i.e., Anadyr Water and Alaska Coastal Water), river discharge, and the nutrient supply from the Pacific inflow that supports marine productivity. | JI Zhongqiang JIN Haiyan STEIN Ruediger LI Zhongqiao BAI Youcheng LI Hongliang ZHANG Yang CHEN Jianfang | 2019 | Journal of Ocean University of China2019，18，3： | 1 |
| 12 | Biogeochemical transport of iodine and its quantitative model显示文摘Iodine deficiency disorders(IDD) are among the world's most prevalent public health problems yet preventable by dietary iodine supplements.To better understand the biogeochemical behavior of iodine and to explore safer and more efficient ways of iodine supplementation as alternatives to iodized salt,we studied the behavior of iodine as it is absorbed,accumulated and released by plants.Using Chinese cabbage as a model system and the 125I tracing technique,we established that plants uptake exogenous iodine from soil,most of which are transported to the stem and leaf tissue.The level of absorption of iodine by plants is dependent on the iodine concentration in soil,as well as the soil types that have different iodine-adsorption capacity.The leaching experiment showed that the remainder soil content of iodine after leaching is determined by the iodine-adsorption ability of the soil and the pH of the leaching solution,but not the volume of leaching solution.Iodine in soil and plants can also be released to the air via vaporization in a concentration-dependent manner.This study provides a scientific basis for developing new methods to prevent IDD through iodized vegetable production. | WENG HuanXin HONG ChunLai YAN AiLan JI ZhongQiang | 2013 | Science China Earth Sciences2013，56，9： | 1 |
| 13 | Vertical distribution of nutrient tracers in the western Arctic Ocean and its relationship to water structure and biogeochemical processes显示文摘During the 3rd Chinese National Arctic Research Expedition cruise in the summer of 2008,nutrients(NO3^-,NO2^-,SiO3^2-,and PO4^3-)and dissolved oxygen were measured in the western Arctic Ocean,to derive the vertical distribution of nutrient tracers and its relationship to water structure and biogeochemical processes.The nutrient data show that surface waters had the lowest NO3^-/PO4^3-(mean of 0.5)and SiO3^2-/PO3^-(mean of 2.8)values in the water column,suggesting an excess of phosphate.Winter Bering Shelf water(wBSW)had high Si^*(16.7μmol/L;Si^*=[Si(OH)4]–[NO3^-])with negative N^*(−11.7μmol/L;N^*=[PO4^3-]−16[PO4^3-]+3.5μmol/L)in the water column,indicating nitrate deficiency.The warm Atlantic layer had positive N^*(0.8μmol/L)and negative Si^*(−5.4μmol/L)compared with Pacific source water.The vertical distribution of nutrients indicates that wBSW can be characterized by N^* minimum and Si^* maximum.In contrast,minima of Si^* and SiO3^2-/PO4^3- below 200 m indicate the distribution of Atlantic warm water. | Yanpei Zhuang Hongliang Li Haiyan Jin Shengquan Gao Jianfang Chen Yangjie Li Youcheng Bai Zhongqiang Ji | 2020 | Acta Oceanologica Sinica2020，39，9： | 1 |
| 14 | Distribution and sources of polycyclic aromatic hydrocarbons in the water column of Kongsfjorden, Arctic显示文摘Kongsfjorden is known for its characteristic multi-layer water mass formed by the convergence of freshwaters from nearby glaciers and rivers and saline water from the Atlantic and Arctic.The distribution of polycyclic aromatic hydrocarbons(PAHs)in the water column of Kongsfjorden was investigated and their potential sources were analyzed.The total concentrations of 16 PAHs in the surface seawater and river water were in the range of 33.4-79.8 ng/L(mean 48.5 ng/L)and 2.3-201.4 ng/L(mean 126.1 ng/L),respectively.Horizontally,PAHs were mainly concentrated around river estuaries and the glacier front in the dissolved phase.Vertically,the PAHs in the particulate phase followed surface-enrichment and depth-depletion patterns in most stations,with the maximum concentration found at 50 m depth in the central area of Kongsfjorden.The compositions of PAHs in seawater and rivers were similar,with two-ring and tricyclic PAHs comprising the majority of the dissolved and particulate phases.PAHs found in Kongsfjorden waters appeared to be derived from multiple sources such as petroleum and coal combustion.PAHs in the bay mouth of Kongsfjorden were mainly introduced by the West Spitsbergen Current and the Arctic waters,while in the inner bay,atmospheric deposition and local sources were the major contributors.The distribution of PAHs was mainly attributed to the suspended particulate distribution. | Ruijing Li Hui Gao Zhongqiang Ji Shuaichen Jin Linke Ge Humin Zong Liping Jiao Zhifeng Zhang Guangshui Na | 2020 | Journal of Environmental Sciences2020，32，11： | 0 |
| 15 | Application of an optical nitrate profiler to high-and low-turbidity coastal shelf waters显示文摘Here,we report the results of high-resolution nitrate measurements using an optical nitrate profiler(in situ ultraviolet spectrophotometer,ISUS)along transect across a high-turbidity shelf(East China Sea)and a low-turbidity shelf(Chukchi Sea).The ISUS-measured nitrate concentrations closely reproduced the results measured by conventional bottle methods in low-turbidity waters.However,for high-turbidity waters of the East China Sea(salinity<30),a correction factor of 1.19 was required to match the standard bottle measurements.The high-resolution ISUS data revealed subtle spatial variability(e.g.,a subsurface nitrate minimum)that may have been missed if based solely on bottle results.Four main structures of the nitracline on the East China Sea are apparent from the ISUS nitrate profile.High-resolution nitrate data are important for studying nitrate budgets and nutrient dynamics on continental shelves. | Yanpei Zhuang Yangjie Li Xizhen Liu Shichao Tian Bin Wang Zhongqiang Ji Haiyan Jin Jianfang Chen | 2023 | Acta Oceanologica Sinica2023，42，1： | 0 |
| 16 | Comparison of Phytoplankton Communities Between Melt Ponds and Open Water in the Central Arctic Ocean显示文摘Climate warming has a significant impact on the sea ice and ecosystem of the Arctic Ocean.Under the increasing numbers of melt ponds in Arctic sea ice,the phytoplankton communities associated with the ice system are changing.During the 7th Chinese National Arctic Research Expedition cruise in summer 2016,photosynthesis pigments and nutrients were analyzed,revealing differences in phytoplankton communities between melt ponds and open water in the central Arctic.Photosynthetic pigment analysis suggested that Fuco(5-91μg m^-3)and Diadino(4-21μg m^-3)were the main pigments in the open water.However,the melt ponds had high concentrations of Viola(7-30μg m^-3),Lut(4-59μg m^-3)and Chl b(11-38μg m^-3),suggesting that green algae dominated phytoplankton communities in the melt ponds.The significant differences in phytoplankton communities between melt ponds and open water might be due to the salinity difference.Moreover,green algae may play a more important role in Arctic sea ice ecosystems with the expected growing number of melt ponds in the central Arctic Ocean. | ZHANG Tianzhen ZHUANG Yanpei JIN Haiyan LI Ke JI Zhongqiang LI Yangjie BAI Youcheng | 2019 | Journal of Ocean University of China2019，18，3： | 0 |
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