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| 1 | The partial pressure of carbon dioxide and air-sea fluxes in the Changjiang River Estuary and adjacent Hangzhou Bay显示文摘The distributions of partial pressure of carbon dioxide (p CO2 ) in the surface waters of the Changjiang River Estuary and adjacent Hangzhou Bay were examined in the summer of 2010. Surface water p CO2 ranged from 751-2 095 μatm (1 atm=101 325 Pa) in the inner estuary, 177-1 036 μatm in the outer estuary, and 498-1 166 μatm in Hangzhou Bay. Overall, surface p CO2 behaved conservatively during the estuary mixing. In the inner estuary, surface p CO2 was relatively high due to urbanized pollution and a high respiration rate. The lowest p CO2 was observed in the outer estuary, which was apparently induced by a phytoplankton bloom because the dissolved oxygen and chlorophyll a were very high. The Changjiang River Estuary was a significant source of atmospheric CO2 and the degassing fluxes were estimated as 0-230 mmol/(m2 d) [61 mmol/(m2 d) on average] in the inner estuary. In contrast, the outer estuary acted as a CO2 sink. | YU Peisong ZHANG Haisheng ZHENG Minhui PAN Jianming BAI Yan | 2013 | Acta Oceanologica Sinica2013，32，6： | 8 |
| 2 | Biomarker records in penguin droppings and observed changes in penguin communities and their response to the ENSO in the Western Antarctic显示文摘Lipid biomarkers in AD2 penguin droppings-amend soil core from the Ardley Island,Western Antarctic,were dated using 210Pb.Changes in the fatty acid ratios of nC18:2/nC18:0 from the penguin droppings reflect climate changes coincident with ENNO events during 1931-2006.The occurrence of the minimum values in the depth of 2-3 and 6-7 cm are consistent with the end of ENSO in 1958 and 1983,respectively,reflecting a lag of the biomarker records in AD2 penguin droppings-amend soil in climatic signatures.This study also reveals that the changes in the relative concentration of n-alkanes nC23,the ratios of nC23/nC17 and nC21 /nC22+,and carbon preferential index(CPI) values collectively indicate the variations of soil microor-ganism and lower plant,which are closely related to climate changes.The ratios of bacterial fatty acids iC15:0/aC15:0 reflect the increasing significance of microorganism activities during the two periods that occurred at the end years of ENSO.Decrease in CPIA value and increase in nC21 /nC22+ indicate that low molecular weight fatty acids are derived from microorganism;and their insignificant correlation with Pr/Ph suggests microorganisms play an important role in the relatively simply ecosystem in the Antarctic and are closely linked to climatic conditions.In addition,the observed penguin community indicates the popula-tion of penguin can largely reflect the impacts of global climate changes on the ecosystem. | ZHANG HaiSheng LU DouDing YU PeiSong ZHANG WeiGuo LU Bing Hans-Ulrich PETER Walter VETTER | 2012 | Science China Earth Sciences2012，55，8： | 6 |
| 3 | Van der Waals two-color infrared photodetector显示文摘With the increasing demand for multispectral information acquisition,infrared multispectral imaging technology that is inexpensive and can be miniaturized and integrated into other devices has received extensive attention.However,the widespread usage of such photodetectors is still limited by the high cost of epitaxial semiconductors and complex cryogenic cooling systems.Here,we demonstrate a noncooled two-color infrared photodetector that can provide temporal-spatial coexisting spectral blackbody detection at both near-infrared and mid-infrared wavelengths.This photodetector consists of vertically stacked back-to-back diode structures.The two-color signals can be effectively separated to achieve ultralow crosstalk of~0.05%by controlling the built-in electric field depending on the intermediate layer,which acts as an electron-collecting layer and hole-blocking barrier.The impressive performance of the two-color photodetector is verified by the specific detectivity(D^(*))of 6.4×10^(9)cm Hz^(1/2)W^(−1)at 3.5μm and room temperature,as well as the promising NIR/MWIR two-color infrared imaging and absolute temperature detection. | Peisong Wu Lei Ye Lei Tong Peng Wang Yang Wang Hailu Wang Haonan Ge Zhen Wang Yue Gu Kun Zhang Yiye Yu Meng Peng Fang Wang Min Huang Peng Zhou Weida Hu | 2022 | Light(Science & Applications)2022，11，2： | 2 |
| 4 | Concentrations and distribution of biogenic barium in surface sediments of Prydz Bay,Antarctica显示文摘Concentrations of biogenic barium were investigated in surface sediments of Prydz Bay,Antarctica,during the 21st and27th CHINARE cruises.Factors controlling the observed distribution are explored.Biogenic barium concentrations obtained from a sequential extraction procedure are compared with total concentrations obtained from the normative calculation based on a total digestion,and differences in the results are examined.Concentrations of biogenic barium,calculated by the normative calculation,were much higher than the concentrations obtained through sequential extraction;this discrepancy is the result of the occurrence of barium associated with Mn/Fe oxides,which represents an important component of total barium in these sediments.Concentrations of biogenic barium obtained from the sequential extraction range from 104 to 445μg·g^(-1),and the average concentration was227μg·g^(-1).The highest concentrations of biogenic barium occur in the central area of the bay,where the seawater is more stable,while lower values occur in the bank and the ice shelf.Biogenic barium is significantly linearly correlated with biogenic barium and organic carbon,and similar in distribution of Chl a,which may indicate that primary productivity of phytoplankton in the surface water column is the main environmental factor regulating barium concentration and distribution. | TAN Saizhang YU Peisong HU Chuanyu HAN Zhengbing ZHANG Haisheng | 2013 | Advances in Polar Science2013，24，3： | 1 |
| 5 | Phytoplankton and chlorophyll a relationships with ENSO in Prydz Bay, East Antarctica显示文摘The historical data of phytoplankton and chlorophyll a(Chl a)(1990–2002)obtained during the Chinese National Antarctic Research Expedition(CHINARE)in the Prydz Bay have been integrated.The results showed that the temperature,salinity,nutrients,and oxygen of seawater changed when El Nino/La Nina occurred.The variation of biological communities reflected the response of ecosystem to environmental changes.During El Ni?o period,Chl a concentration and phytoplankton community structure changed significantly,and the relative proportion of diatoms increased while dinoflagellates decreased.During La Ni?a period,the proportion of diatoms decreased,but the golden-brown algae and blue-green algae increased significantly.The variation of phytoplankton population directly affected the biodiversity of the bay,which were also quite sensitive to the marine environment changes.Meanwhile,the satellite remote sensing data of 2002–2011(December–March)have been used to study the temporal connection change of Chl a and phytoplankton in the Prydz Bay.We found that there were significant differences in the monthly variation characteristics of satellite remote sensing Chl a and sea surface temperature(SST),which had some links with sea ice melting and El Ni?o/La Ni?a events.We found that the start time of bloom advanced,lagged or synchronized with the changes of the SST,and we also found the occurrence time of phytoplankton bloom corresponded with the sea ice melting inner bay.To some extent,this study will help us understand the relationships between ENSO events and the phytoplankton bloom in the Southern Ocean. | ZHANG HaiSheng HAN ZhengBing ZHAO Jun YU PeiSong HU ChuanYu SUN WeiPing Yang Dan ZHU GenHai LU Bing Hans-UIrich PETER Walter VETTER | 2014 | Science China Earth Sciences2014，57，12： | 1 |
| 6 | Variations of calcareous nannofossils of cobalt-rich crusts and geological records at the Eocene-OIigocene transition in western Pacific seamounts显示文摘Two records of the crust laminae from the Marcus-Wake Seamounts and the Magellan Seamount were biostratigraphically studied. Based on biological imprints of the calcareous nannofossils, the geological ages of the two records were determined, with CM1D03 from the Marcus-Wake Seamounts being of late Paleocene to Pleistocene and CM3D06 from the Magellan Seamount of Late Cretaceous(more than 70.0 Ma). There are the obvious temporal-spatial differences in the initial formation period and enrichment characteristics of the cobalt-rich crusts of the two seamount chains and differences in the combination and distribution of microfossils in the inner crust layers between the seamounts. These differences are due to the adaptabilities of oceanic species in different environments. Ecological research was carried out in terms of population size of the calcareous nannofossils preserved in the crustal layers to discern the relation of the geological events at the Eocene-Oligocene(E/O) transition. The results show the transitions and recombination of species in the biotic community during the E/O transition obviously corresponded to 25 mm depth in the CM1D03 crust and 58 mm depth in the CM3D06 crust. The changes in biological species and the formation of particular ecological structures indicate the adaptive response of the paleo-biological community in the western Pacific Ocean to the global cold-climate events and the close correlation between the formation of the crust and the global climate change. | ZHANG HaiSheng HU Ji ZHAO Jun HAN ZhengBing YU PeiSong WU GuangHai LEI Ji Jiang LU Bing Irina A PULYAEVA | 2015 | Science China Earth Sciences2015，58，5： | 1 |
| 7 | SOLS: A scheme for outsourced location based service显示文摘 | Chi Chen Xiaojie Zhu Peisong Shen Jing Yu Jiankun Hu | 2015 | Jour- nal of Network and Computer Applications (JNCA)2015，56，： | 1 |
| 8 | Short-and Long-Term Response of Phytoplankton to ENSO in Prydz Bay, Antarctica: Evidences from Field Measurements, Remote Sensing Data and Stratigraphic Biomarker Records显示文摘The study provides one of the first lines of evidence showing linkages between Antarctic phytoplankton abundance and composition in response to ENSO, based on historical reconstruction of sediment biomarkers. In addition to sediment biomarkers, field measured and remote sensing data of phytoplankton abundance were also recorded from Prydz Bay, Eastern Antarctica. Community structure of field measured phytoplankton showed significant El Nino/La Nina-related succession during 1990 to 2002. In general, the number of algae species decreased during El Nino and La Nina years compared to normal years. Austral summer monthly variation of remotely sensed chlorophyll-a(Chl-a), particulate organic carbon(POC), and sea surface temperature(SST) indicated that ENSO impacted the timing of phytoplankton blooms during 2007 to 2011. Phytoplankton blooms(indicated by Chl-a and POC) preceded the increases in SST during El Nino years, and lagged behind the SST increases during La Nina years. Stratigraphic record of marine sedimentary lipid(brassicasterol, dinosterol and alkenones) biomarkers inferred that the proportions of different algae(diatoms, dinoflagellates and haptophytes) changed significantly between El Nino and La Nina events. The relative proportion of diatoms increased, with that of dinoflagellates being decreased during El Nino years, while it was reversed during La Nina years. | ZHAO Jun Hans-Ulrich Peter ZHANG Haisheng HAN Zhengbing HU Chuanyu YU Peisong LU Bing Thomas S.Bianchi | 2014 | Journal of Ocean University of China2014，13，3： | 0 |
| 9 | Distribution of transparent exopolymer particles and their response to phytoplankton community structure changes in the Amundsen Sea,Antarctica显示文摘To understand the response of transparent exopolymer particles(TEP)to the changes in phytoplankton communities caused by melting sea ice,we collected samples from the polynya and open ocean affected by the Antarctic circumpolar current in the Amundsen Sea.TEP,pigments,and other environmental factors were analyzed.The results showed that high TEP content was mainly found in the polynya,and was higher in the surface layer than in the deep layer.The main factor that affected TEP distribution was the phytoplankton community.In the polynya area,the phytoplankton were dominated by low-iron Haptophyta.In the Antarctic circumpolar current region affected by ice-melting water,the dominant species was diatom type II.Our results revealed that low-iron Haptophyta may be the main contributors to TEP content. | XUE Siyou HU Ji FENG Yubin LI Dong ZHANG Haifeng ZHAO Jun HAN Zhengbing YU Peisong PAN Jianming | 2022 | Advances in Polar Science2022，33，1： | 0 |
| 10 | Phytoplankton community changes indicated by biomarker from sediment in Prydz Bay, Antarctica显示文摘Biomarkers including brassicasterol, dinosterol and alkenone in sediments are used as indicators to reconstruct changes to the phytoplankton community in surface and sub-aerial sediments of Prydz Bay, Antarctica. The results indicate that the biomarker records in surface and core sediment samples changed with time and space. The total content of phytoplankton biomarkers ranges from 391.0-1 470.6 ng·g-1 . The phytoplankton biomass has increased in Prydz Bay over the past 100 years. This variation may be mainly related with climate change in the region. The total biomarker contents in surface sediments from 5 stations in Prydz Bay are in the range of 215.8-1 294.3 ng·g-1 . The phytoplankton biomass in Prydz Bay is higher than that outside of the bay. This is similar to the distributions of chlorophyll a, organic carbon and biogenic silica in surface waters determined through in situ investigation. Such consistency indicates a coupling between the bottom of the ocean and biogeochemical processes in the upper water. | YU Peisong ZHANG Haisheng HU Chuanyu LU Bing | 2012 | Advances in Polar Science2012，23，4： | 0 |
| 11 | Impact of transparent exopolymer particles on the dynamics of dissolved organic carbon in the Amundsen Sea,Antarctica显示文摘The Southern Ocean is an important carbon sink pool and plays a critical role in the global carbon cycling.The Amundsen Sea was reported to be highly productive in inshore area in the Southern Ocean.In order to investigate the influence of transparent exopolymer particles(TEP)on the behavior of dissolved organic carbon(DOC)in this region,a comprehensive study was conducted,encompassing both open water areas and highly productive polynyas.It was found that microbial heterotrophic metabolism is the primary process responsible for the production of humic-like fluorescent components in the open ocean.The relationship between apparent oxygen utilization and the two humic-like components can be accurately described by a power-law function,with a conversion rate consistent with that observed globally.The presence of TEP was found to have little impact on this process.Additionally,the study revealed the accumulation of DOC at the sea surface in the Amundsen Sea Polynya,suggesting that TEP may play a critical role in this phenomenon.These findings contribute to a deeper understanding of the dynamics and surface accumulation of DOC in the Amundsen Sea Polynya,and provide valuable insights into the carbon cycle in this region. | HU Ji XUE Siyou ZHAO Jun LI Dong ZHANG Haifeng YU Peisong ZHANG Cai YANG Xufeng PAN Jianming | 2024 | Advances in Polar Science2024，35，1： | 0 |
| 12 | Prediction of methane storage in covalent organic frameworks using big-data-mining approach显示文摘A combination of computational materials screening and machine learning(ML)technique is being adopted as a popular approach to study various materials toward application of interest.In this work,we began with high-throughput molecular simulations to calculate the methane storage(6.5 MPa)and deliverable(6.5-0.58 MPa)capacities of 404,460 covalent organic frameworks(COFs)at 298 K.Then,the full data sets with 23 features were randomly split into training and test sets in a ratio of 20:80,which were applied to evaluate the prediction abilities of several ML algorithms,including gradient boosting decision tree(GBDT),neural network(NN),support vector machine(SVM),random forest(RF)and decision tree(DT).The results indicate that the RF model has the highest prediction accuracy,which was further employed to reduce the dimension of features space and quantitatively analyze the relative importance of each feature value.The binary classification predictors built using the features with the highest influence weight can give a successful identification of top-performing candidates from the test set containing 323,168 COFs with an accuracy exceeding 96%.The deliverable capacities of the identified COFs were found to outperform those reported so far for various adsorbents.The findings may provide a useful guidance for the design and synthesis of new high-performance materials for methane storage application. | Huan Zhang Peisong Yang Duli Yu Kunfeng Wang Qingyuan Yang | 2021 | Chinese Journal of Chemical Engineering2021，34，11： | 0 |
| 13 | Analyzing acetylene adsorption of metal-organic frameworks based on machine learning显示文摘Metal-organic frameworks(MOFs) containing open metal sites are important materials for acetylene(C_(2)H_(2)) adsorption.However,it is inefficient or even impossible to search suitable MOFs by molecular simulation method in nearly infinite MOFs space.Therefore,machine learning(ML) methods are adopted in the material screening and prediction of high-performance MOFs.In this paper,architecture,chemical and structural features are used to analyze the C_(2)H_(2) adsorption performance of the MOFs.Different ML algorithms are applied to perform classification and regression analysis to the factors affecting material adsorption.By decision tree(DT) algorithm,it is found that only PV,GSA,and Cu-OMS are sufficient to determine the high adsorption of the MOFs.Furthermore,the influence of topology on the performance of MOFs is obtained.Gradient Boosting Decision Tree(GBDT),Support Vector Machine(SVM),and Back Propagation Neural Network(BPNN),are introduced to analyze the quantitative structure-property relationship(QSPR) between C_(2)H_(2) adsorption and the features of MOFs.The prediction of the GBDT model is found to have the highest accuracy,with R~2 as 0.93 and RMSE as 11.58.In addition,the GBDT model is used for feature analysis,and the contribution of each feature to the performance is obtained,which is of great significance for the design and analysis of MOFs.The successful application of ML to MOFs screening greatly reduce the calculation time and provides important reference for the design and synthesis of new MOFs. | Peisong Yang Gang Lu Qingyuan Yang Lei Liu Xin Lai Duli Yu | 2022 | Green Energy & Environment2022，7，5： | 0 |
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