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| 1 | Monitoring the concentration of N_2O in the Fildes Peninsula, maritime Antarctica显示文摘Gases in the marine boundary layer in Fildes Peninsula, maritime Antarctica were sampled and analyzed for the first time. Sampling sites included areas covered by moss and lichen growth, penguin colonies and an area where scientific research stations are located. A total of 211 samples were analyzed for N2O concentrations, with an average of (321.33±3.07) nL/L. This is above the global average value of 314 nL/L. It is found that the N2O concentrations evidently increase during the summer months. Concentrations around the research stations are higher than at remote areas, indicating a potential source from human activities on the island. N2O concentrations at a large penguin colony on Barton Peninsula are the highest among the sampled areas. This may explain why N2O concentrations in Fildes Peninsula are higher than the global average. Our preliminary conclusions are that human activities and emissions from penguin dropping-amended soil and vegetation soil constitute the major sources of N2O in the | SUN Liguang, XIE Zhouqing, ZHAO Junlin, XING Guangxi, SHI Shulian & Du LijuanInstitute of Polar Environment, University of Science and Technology of China, Hefei 230026, China Institute of Environmental Science, Beijing Normal University, Beijing 100875, China Laboratory of Material Cycling in Pedosphere, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 2 10008, China | 2000 | Chinese Science Bulletin2000，45，21： | 21 |
| 2 | Atmospheric nitrous oxide observations above the oceanic surface during CHINARE-18显示文摘The gas samples in the marine boundary layer were collected from the track for research ship Xuelong during the 18th Chinese Antarctic Research Expedition (CHINARE-18) and nitrous oxide measurements were made by HP5890ECD-GC in the laboratory. The results represent the shipboard N2O data set obtained within the lower troposphere with the average concentration of (313.5±2.6)nL*L-1 from 31°N to 69°S. The results showed a latitudinally weighted, mean interhemispheric difference of 0.61 nL*L-1. The latitudinal distribution of atmospheric N2O concentration was analyzed from northern midlatitudes to Southern Ocean around the Antarctic continent and it was showed that N2O concentration in the current confluences was higher than that in other oceanic areas. This indicated that strong N2O emissions occurred there. The longitudinal distribution of N2O concentrations in the Southern Ocean also showed similar situation. According to the interhemispheric difference of atmospheric N2O concentrations and the two-box model, we estimated that 2/5 of the global flux of N2O into the atmosphere is derived from the sources in the southern hemisphere. | ZHU Renbin, SUN Liguang and LIU Xiaodong(Institute of Polar Environment, University of Science and Technology of China, Hefei 230026, China) | 2003 | Progress in Natural Science:Materials International2003，13，8： | 9 |
| 3 | Variation of Antarctic seal population in response to human activities in the 20th century显示文摘A sediment core was collected from the Fildes Peninsula of Antarctica, which contained numerous seal hairs and was identified to be seal excrement deposition. By analyzing its total organic carbon (TOC) and concentrations of bio-elements, the seal population changes of the past century were reconstructed. The variation of seal population in the last century on the Fildes Peninsula is primarily controlled by human activities. The sealing industry in the early 20th century caused the dramatic decline of seal popula-tion. The protection of the Antarctic seals since the 1960s and the reduced seal's competition with whales for prey resources due to whaling lead to the recovery of seal population and make the high level of the seal population sustainable. | YANG QiChao SUN LiGuang KONG DeMing HUANG Tao WANG YuHong | 2010 | Chinese Science Bulletin2010，55，11： | 7 |
| 4 | Thymic epithelial progenitor cells and thymus regeneration: an update显示文摘胸腺为 T 房间开发和成熟提供必要微型环境。Thymic 上皮的房间(侦探) 它是 thymic 填写了外皮的上皮的房间(cTECs ) 和 thymic 髓的上皮的房间(mTECs ) ,很好被记录了为这些紧调整的过程批评。侦探的普通祖先房间是否能产生 cTECs 和 mTECs,长是争论的。大进步被取得了在最近的年里描绘普通侦探祖先房间。我们此处在胸腺新生象这些祖先房间一样关于侦探区别讨论唯一的起源范例。 | Lianjun Zhang Liguang Sun Yong Zhao | 2007 | Cell Research2007，17，1： | 7 |
| 5 | Higher sea surface temperature in the northern South China Sea during the natural warm periods of late Holocene than recent decades显示文摘The large-scale syntheses of global mean temperatures in IPCC fourth report suggested that the Northern Hemisphere temperature in the second half of the 20th century was likely the highest in at least the past1,300 years and the 1990s was likely the warmest decade.However,this remains debated and the controversy is centered on whether temperatures during the recent half century were higher than those during the Medieval Climate Anomaly(MCA,AD 800–1300)and the Roman Warm Period(RWP,BC 200–AD 400),the most recent two natural warm periods of the late Holocene.Here the high resolution sea surface temperatures(SSTs)of two time windows around AD 990(±40)and AD 50(±40),which located in the MCA and RWP respectively,were reconstructed by the Sr/Ca ratio and d18O of Tradacna gigas shells from the northern South China Sea.The results suggested that the mean SSTs around AD 990(±40)and AD 50(±40)were 28.1°C and 28.7°C,0.8°C and 1.4°C higher than that during AD 1994–2005,respectively.These records,together with the tree ring,lake sediment and literature records from the eastern China and northwest China,imply that the temperatures in recent decades do not seem to exceed the natural changes in MCA,at least in eastern Asia from northwest China to northern SCS. | Hong Yan Liguang Sun Da Shao Yuhong Wang Gangjian Wei | 2014 | Chinese Science Bulletin2014，59，31： | 4 |
| 6 | Ecosystem evolution of seal colony and the influencing factors in the 20th century on Fildes Peninsula,West Antarctica显示文摘As the topmost predator in Antarctica,the seal is a unique indicator of Antarctic environment and climate changes.In this study,we collected a sediment core from the Fildes Peninsula of West Antarctica,and used cholesterol,cholestanol,epicoprostanol,coprostanol,and seal hair numbers as the proxy indicators of seal population size and phytol as of general vegetation,and we reconstructed the 20th century history of variation of the seal population and vegetation abundance on this island.The sealing industry in the early 20th century caused the dramatic decline of seal population,and the ban of seal hunting since the 1960s led to its recovery of seal population.The seal population during the past century was primarily controlled by human activities and krill density.The reconstructed relation between seal population and vegetation abundance may offer new insights into Antarctic environment and ecology. | Jing Huang Liguang Sun Xinming Wang Yuhong Wang Tao Huang | 2011 | Journal of Environmental Sciences2011，23，9： | 4 |
| 7 | Stimulation of gaseous phosphine production from Antarctic seabird guanos and ornithogenic soils显示文摘Matrix-bound phosphine(MBP) is a general term used to indicate non-gaseous reduced phosphorus compounds that are transformed into phosphine gas upon reaction with bases or acids.Antarctic seabird guanos and ornithogenic soils were used as materials to compare the different digestion methods for transforming matrix-bound phosphine into phosphine gas.The results demonstrated that more phosphine gas in most of Antarctic environmental materials was formed of matrix-bound phosphine by caustic digestion than by acidic digestion.The comparative study on different digestion methods also revealed that the fraction of MBP converted to gaseous phosphine during the digestion depended on the temperature.The optimal digestion temperature was close to 70℃ and the optimal digestion time was about 20 min.Acidic conditions were more favorable for the release of matrix-bound phosphine compared to the neutral conditions.A proper water dilution can increase the production and emission of phosphine from the Antarctic penguin guanos. | ZHU Renbin LIU Yashu SUN Jianjun SUN Liguang GENG Jinju | 2009 | Journal of Environmental Sciences2009，21，2： | 3 |
| 8 | High resolution oxygen isotope and grayscale records of a medieval fossil giant clam(Tridacna gigas) in the South China Sea: physiological and paleoclimatic implications显示文摘Mollusks are well known for their detailed recording of paleoenvironmental and paleoclimatic changes in their carbonate shells. In this study, we constructed 18-year blue color intensity and oxygen isotope profiles of a 14 C dated(AD 990±40) fossil giant clam, Tridacna gigas, from Shidao Island, South China Sea. The δ18O profile of the T. gigas specimen displayed regular annual cycles and was probably controlled by seasonal variations of the climatic parameters. The blue color intensity profile showed good agreement with the δ18O series, and both had 18 clear annual cycles in accordance with the 18 visually identified annual growth bands. The annual shell growth rate determined from the blue color intensity and oxygen isotope profiles indicated that the annual shell increment of the Tridacna specimen was stable after the onset of sexual maturity. Spectral analysis of the δ18O and blue color intensity time series suggested that the El Nio–Southern Oscillation(ENSO) period observed in the instrumental temperature and precipitation records of the South China Sea during the past 50 years also existed in medieval times. Our results showed that fossil giant clams could provide a good archive of historical intra-seasonal to decadal climate variations. | YAN Hong WANG Yuhong SUN Liguang | 2014 | Acta Oceanologica Sinica2014，33，8： | 3 |
| 9 | Relocation of the Yellow River Estuary in 1855 AD Recorded in the Sediment Core from the Northern Yellow Sea显示文摘Relocation of the Yellow River estuary has significant impacts on not only terrestrial environment and human activities,but also sedimentary and ecological environments in coastal seas.The responses of regional geochemical characteristics to the relocation event,however,have not been well studied.In the present study,we performed detailed geochemical elemental analyses of a sediment core from the northern Yellow Sea and studied their geochemical responses to the 1855 AD relocation of the Yellow River estuary.The results show that TOC/TN,Co/Al2O3,Cr/Al2O3,Ni/Al2O3and Se/Al2O3ratios all decreased abruptly after 1855 AD,and similar decreases are observed in the sediments of the mud area southwest off the Cheju Island.These abrupt changes are very likely caused by the changes in source materials due to the relocation of the Yellow River estuary from the southern Yellow Sea to the Bohai Sea,which the corresponding decreasing trends caused by the changes in main source materials from those transported by the Liaohe River,the Haihe River and the Luanhe River to those by the Yellow River.Because the events have precise ages recorded in historical archives,these obvious changes in elemental geochemistry of sediments can be used to calibrate age models of related coastal sea sediments. | ZHOU Xin JIA Nan CHENG Wenhan WANG Yuhong SUN Liguang | 2013 | Journal of Ocean University of China2013，12，4： | 3 |
| 10 | Potential Applications of X-ray Fluorescence Core Scanner in Elemental Analyses of the Muddy Sediments on the Coastal Shelves of China and in Ecological Study显示文摘Large areas of muddy sediments on the coastal shelves of China provide important samples for studying climate and ecological changes.Analysis of a large number of such samples,which is essential for systematic study on environmental information recorded in mud areas because of complicated sedimentary environment and variable sedimentary rate,requires a fast and economical method.In this study,we investigated the potential of X-ray fluorescence core scanner(XRFS),a fast analytical instrument for measuring the elemental concentrations of muddy sediments,and observed a significant correlation between the element concentrations of muddy sediments determined by regular X-ray fluorescence spectrometer(XRF)and XRFS,respectively.The correlations are mainly determined by excitation energy of elements,but also influenced by solubility of element ions.Furthermore,we found a striking link between Al concentrations and marine-originated organic carbon(MOC),a proxy of marine primary productivity.This indicates that MOC is partly controlled by sedimentary characteristics.Therefore,XRFS method has a good potential in fast analysis of a large number of muddy sediment samples,and it can also be used to calibrate MOC in ecological study of coastal seas. | ZHOU Xin SUN Liguang LIU Yi WANG Yuhong | 2013 | Journal of Ocean University of China2013，12，4： | 2 |
| 11 | Biomineralization process occurring in iron mud of coastal seepage area of Zhoushan Island, Zhejiang Province显示文摘The biomineralization process of iron oxidizing bacteria and its influence on accumulation of metals were investigated by modern biological observation techniques (i.e., SEM and TEM) and geochemical methods, in coastal area of Zhoushan Island, Zhejiang province where a thick ancient wood layers were buried, Results show that the iron mud samples mainly contain Leptothrix-like sheaths and Gal-lionella-like stalks, which are known as neutrophilic iron-oxidizing bacteria. These two bacteria are present as obviously different abundance in two sampling sites, which may be regulated by the geo-chemistry of seepage water. The biomineralization product of iron oxidizing bacteria is ferrihydrite, a poorly ordered iron oxide, and formation of amorphous mineral is affected by the factors of bacteria, minor Si and temperature preventing any further transformation into more crystalline phases. Organic functional groups, extracellular polymers and surface charges can provide favorable nucleation sites or template for formation of iron precipitates on the bacterial surface. The mineralization process of the iron oxidizing bacteria is divided into different stages, i.e., extracellular mineralization, intracellular mineralization and the whole cell mineralization. Furthermore, due to BIOS containing the bacterial organic matter, the accumulation capacity of metals specially Fe and Co is highly increased, suggest-ing that BIOS exert a degree of controlling in the cycling of metal elements in seepage area. | WU ZiJun JIA Nan YUAN LinXi SUN LiGuang | 2008 | Chinese Science Bulletin2008，53，12： | 2 |
| 12 | Holocene climate change and anthropogenic activity records in Svalbard: a unique perspective based on Chinese research from Ny-?lesund显示文摘Climate change in the Arctic region is more rapid than that in other areas owing to Arctic amplification.To better understand climate change and the driving mechanisms,long-term historical reconstructions throughout the Holocene and high-resolution records of the past few hundred years are required.Intense anthropogenic activities in the Arctic have had a great impact on the local environment.Here,we review the Holocene climate change record,responses of the ecosystems to climate change,and the anthropogenic impacts on the environment based mainly on Chinese research from Ny-?lesund.Climate reconstruction studies from Svalbard have revealed several cold episodes during the Holocene,which are consistent with ice rafting events in the North Atlantic region and glacier activity from Greenland,Iceland,and Svalbard.The ecosystem also showed corresponding responses to climate change,especially during the late Holocene.Over recent decades,anthropogenic activities have caused serious pollution and deterioration to the local environment in Svalbard in areas frequented by people.Greater environmental protection is therefore needed to reduce the anthropogenic impacts on the local environment. | YANG Zhongkang YUAN Linxi WANG Yuhong SUN Liguang | 2017 | Advances in Polar Science2017，28，2： | 2 |
| 13 | Ecological responses of typical Antarctic marine organisms to climate change and anthropogenic impacts显示文摘To improve our understanding and ability to predict biological responses to global climate change, it is important to be able to distinguish the influences of natural forcing from anthropogenic impacts. In the ice-free areas of Antarctica, lake and terrestrial sediments that contain penguin guanos, seal excrement and other biological remains provide natural archives of ecological, geological and climatic information that range from hundreds to thousands of years old. Our review focuses on the paleoecology of typical Antarctic marine organisms(penguins, seals and Antarctic krill) and their responses to climate change and human activities over centennial and millennial timescales. Land-based seabirds and marine mammals play an important role in linking the marine and terrestrial ecosystems and act as bio-vectors, transporting large amounts of nutrients and contaminants from ocean to land. | YANG Lianjiao HUANG Tao XIE Zhouqing LIU Xiaodong ZHU Renbin CHU Zhuding WANG Yuhong SUN Liguang | 2017 | Advances in Polar Science2017，28，2： | 2 |
| 14 | Alkaline phosphatase activity in ornithogenic soils in polar tundra显示文摘Phosphatase plays an important role in the microbial liberation of phosphorus in soil systems.In this study,alkaline phosphatase activity (APA) was investigated from tundra ornithogenic soil profiles in Antarctica and Arctic.The organic carbon (TOC),total nitrogen (TN),and phosphorus fractions and pH were also analyzed in these soils.The correlation between APA and soil chemical properties is discussed.In almost all the soil profiles,APA showed the same variation patterns.The maximum APA appeared in the surface layers,and decreased with soil depth.The APA ranged from 1.00 ppm to 1 403.5 ppm with an average of approximately 408.3 ppm.The APA showed a significant positive correlation with TOC (r =0.70,p <0.001),TN (r =0.43,p =0.002),total phosphorus (r =0.39,p <0.05)and inorganic phosphorus (r =0.40,p =0.037),indicating that they were predominant factors affecting APA in the polar tundra soils.In addition,APA showed a significant negative correlation with Cu and Zn concentrations in the soils,indicating that Cu and Zn may inhibit APA.Our results showed that APA could be used as an important indicator for soil fertility in polar tundra ecosystems. | MA DaWei ZHU RenBin DING Wei SUN JianJun LIU YaShu SUN LiGuang | 2011 | Advances in Polar Science2011，22，2： | 2 |
| 15 | A 2200-year Record of Seabird Population on Ganquan Island,South China Sea显示文摘107 厘米的 Geochemical 特征长沉积侧面,从 Ganquan 岛镇定,华南海,被分析。基于简历元素的集中(Cu, Zn, Cd, Ba,同样 Se, P ) ,标明日期的 210Pb 和 AMS14C,我们重建了在过去的 2200 年的 Ganquan 岛的海鸟人口。海鸟超过 2200 年以前住在这个岛,并且他们的人口分别地在 21001850 年 BP 和 900300 年 BP 附近与二座山峰显示了显著变化。Ganquan 岛上的海鸟人口变化侧面在在过去的 1800 年的 Dongdao 岛上类似于那。我们检验了在海鸟人口和气候之间的关系,并且发现它相当复杂。海鸟人口没与相对高的平均温度在医药温暖的时期(MWP ) 期间到达最大值;然而,它在气候的转变时期和小冰川期(LIA ) 期间在山峰价值附近留下了大约 600 年,显示相对凉爽的气候为 Ganquan 岛上的海鸟是有利的。 | XU Liqiang LIU Xiaodong SUN Liguang YAN Hong LIUYi LUO Yuhan HUANG Jing | 2011 | Acta Geologica Sinica(English Edition)2011，85，4： | 2 |
| 16 | Millennial mercury records derived from ornithogenic sediment on Dongdao Island,South China Sea显示文摘Two ornithogenic sediment cores,which have a time span of 1000 years and are influenced by red-footed booby (Sula sula),were collected from Dongdao Islands,South China Sea.The determined mercury concentrations of the two cores show similar and substantial fluctuations during the past millennium,and the fluctuations are most likely caused by the changes in mercury level of the ocean environment and in anthropogenic Hg emission.For the past 500 years,the mercury concentration in the red-footed booby excrement has a striking association with global anthropogenic mercury emission.The mercury concentration increased rapidly after AD 1600 in corresponding to beginning of the unparalleled gold and silver mining in South Central America that left a large volume of anthropogenic mercury pollution.Since the Industrial Revolution,the mercury level has increased at a fast pace,very likely caused by modern coal combustion,chlor-alkali and oil refining industries.The comparison of mercury profiles from different places on earth suggested that anthropogenic mercury pollution after the Industrial Revolution is more severe in Northern Hemisphere than in Antarctica. | Hong Yan Yuhong Wang Wenhan Cheng Liguang Sun | 2011 | Journal of Environmental Sciences2011，23，9： | 2 |
| 17 | The first determination of atmospheric phosphine in Antarctica显示文摘It is generally thought that phosphine (PH3) concentrations exist at the low ng/m3 level during the night and at the pg/m3 level during daylight in the remote atmosphere of the lower troposphere. The first de- termination of gaseous PH3 on the Antarctic Millor Peninsula is reported in this paper. No PH3 was de- tected in the air samples around 10:00 when it was sunny. However, PH3 was found in all the 10:00 air samples when it was cloudy or light snow with the average of 75.3±28.8 ng/m3 (n=5). It was also found in nearly all the samples around 22:00 with the average of 87.2±70.9 ng/m3 (n=11). Atmospheric PH3 concentrations around 22:00 were generally higher than those around 10:00 in January and they were almost the same in February. In addition, PH3 concentrations around 22:00 showed a downtrend with the decreasing air temperature, suggesting that light intensity and air temperature had an important effect on atmospheric PH3 concentration. It is very surprising to have found that high concentrations of PH3 exist in the Antarctic atmosphere under the influence of strong UV-radiation and light intensity. The tentative analyses show that dry, cold and very clean atmosphere may be very suitable for the PH3 sur- vival and cause the concentration to increase and accumulate in the local atmosphere. New ap- proaches for the PH3 formation and the process of atmospheric chemistry may exist under such an extreme environment. Atmospheric PH3 may also be from the emissions of local sources. | ZHU RenBin KONG DeMing SUN LiGuang GENG JinJu WANG XiaoRong | 2007 | Chinese Science Bulletin2007，52，1： | 1 |
| 18 | Matrix-bound phosphine in Antarctic biosphere显示文摘 | Renbin Zhu Liguang Sun Deming Kong Jinju Geng Ning Wang Qiang Wang Xiaorong Wang | 2006 | Chemosphere2006，，8： | 1 |
| 19 | Temporal and spatial variations of nitrous oxide fluxes from the littoral zones of three alga-rich lakes in coastal Antarctica显示文摘 | Yashu Liu Renbin Zhu Dawei Ma Hua Xu Yuhan Luo Tao Huang Liguang Sun | 2010 | Atmospheric Environment2010，，7： | 1 |
| 20 | Characterization of Fe-S minerals influenced by buried ancient woods in the intertidal zone,East China Sea显示文摘An ancient wood layer dated at about 5600 cal. a BP by AMS14C dating was discovered in the intertidal zone, East China Sea. Samples affected by ancient woods, including fresh coast bedrock, weathering bedrock, seepage water from coast, seepage water from ancient wood layer, intertidal seawater, fresh water, beach mud, ancient wood barks and ancient peat, were collected for geochemical analysis. The beach mud and the bacteriogenic iron oxides (BIOS) in coastal seepage water were analyzed by min-eralogical and high-resolution transmission electron microscopy (HRTEM)-selected area electron dif-fraction (SAED) analysis. Inorganic sulfur compositions and δ34S of the ancient peat and the beach mud were determined. The results showed that Fe, Mn, S (SO42-) were enriched in the intertidal area at different levels, very likely caused by fermentation of ancient woods. The presence of abundant iron-oxidizing bacteria (FeOB) and sulfate-reducing bacteria (SRB) in this intertidal zone was confirmed by HRTEM-SAED observation, and these bacteria were involved in Fe-S cycle to induce extracellular biomineralization. The negative δ34SV-CDT (-2.9‰) likely indicated the biogenic origin of iron-sulfide minerals in the beach mud at high sulfate reduction rate (SRR). These findings are helpful for under-standing the biogeochemical Fe-S cycle and biomineralization process at high organic matter deposition rate and high SRR in the intertidal zone, estuary, or near shoreline. | YUAN LinXi SUN LiGuang FORTIN Danielle WANG YuHong WU ZiJun YIN XueBin | 2009 | Chinese Science Bulletin2009，54，11： | 1 |
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