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Terrestrial carbon sinks in china and around the world and their contribution to carbon neutrality

Science china(Life {1.) 2022年第5期65卷 861-895页

作者： Yuanhe Yang yue {1. Wenjuan Sun Jinfeng Chang Jianxiao Zhu Leiyi Chen Xin {2. Yanpei Guo Hongtu Zhang Lingfei Yu Shuqing Zhao Kang Xu Jiangling Zhu Haihua Shen Yuanyuan {2. Yunfeng Peng Xia Zhao Xiangping {2. Huifeng Hu {1.ping Chen Mei Huang Xuefa Wen Shaopeng {2. Biao Zhu Shuli Niu Zhiyao Tang Lingli Liu Jingyun Fang State Key Laboratory of Vegetation and Environmental Change Institute of BotanyChinese Academy of SciencesBeijing 100093China university of Chinese Academy of {1. Beijing 100049China College of Environmental and Resource sciences Zhejiang UniversityHangzhou 310058China State Key Laboratory of Grassland Agro-ecosystems College of Pastoral Agriculture Science and TechnologyLanzhou UniversityLanzhou 730020China Institute of Ecology College of Urban and Environmental SciencesLaboratory for Earth Surface Processes of the Ministry of EducationPeking UniversityBeijing 100871China school of Ecology and Nature Conservation Beijing Forest UniversityBeijing 100083China Key Laboratory of Ecosystem Network Observation and Modeling Institute of Geographic Sciences and Natural Resources ResearchChinese Academy of SciencesBeijing 100101China

Enhancing the terrestrial ecosystem carbon sink(referred to as terrestrial C sink) is an important way to slow down the continuous increase in atmospheric carbon dioxide(CO_(2.) concentration and to achieve carbon neutrality *** better understand the characteristics of terrestrial C sinks and their contribution to carbon neutrality,this review summarizes major progress in terrestrial C budget researches during the past decades,clarifies spatial patterns and drivers of terrestrial C sources and sinks in{1. and around the world,and examines the role of terrestrial C sinks in achieving carbon neutrality *** to recent studies,the global terrestrial C sink has been increasing from a source of (-0.2.0.9) Pg C yr^(-1.(1.Pg=1.1.g)in the 1.60s to a sink of (1.9±1.1. Pg C yr^(-1. in the *** synthesizing the published data,we estimate terrestrial C sink of 0.2.–0.2. Pg C yr^(-1. in{1. during the past decades,and predict it to be 0.1.–0.52.Pg C yr^(-1. by *** terrestrial C sinks are mainly located in the mid-and high latitudes of the Northern Hemisphere,while tropical regions act as a weak C sink or *** C balance differs much among ecosystem types:forest is the major C sink;shrubland,wetland and farmland soil act as C sinks;and whether the grassland functions as C sink or source remains *** might be a C sink,but the magnitude and the associated mechanisms are still *** atmospheric CO_(2. concentration,nitrogen deposition,climate change,and land cover change are the main drivers of terrestrial C sinks,while other factors such as fires and aerosols would also affect ecosystem C *** driving factors of terrestrial C sink differ among *** CO_(2. concentration and climate change are major drivers of the C sinks in North America and Europe,while afforestation and ecological restoration are additionally important forcing factors of terrestrial C sinks in *** future studies,we recommend th

关键词： terrestrial ecosystem carbon sink carbon neutrality carbon cycle global warming

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Dynamic-static coupled sensing of trace biomarkers by molecularly imprinted metal-organic frameworks

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Science china Chemistry 2023年第12期66卷 3511-3517页

作者： Hui Min Zongsu Han Tiankai Sun Kunyu wang Jun Xu Peiyu Yao Sihai Yang Peng Cheng Wei {1. Department of Chemistry Key Laboratory of Advanced Energy Materials Chemistry(MOE)and Frontiers Science Center for New Organic MatterCollege of ChemistryNankai UniversityTianjin 300071China school of Materials Science and Engineering&National Institute for Advanced Materials Center for Rare {1. and Inorganic Functional Materials Tianjin Key Lab for Rare Earth Materials and ApplicationsNankai UniversityTianjin 300350China Department of Emergency Tianjin Union Medical CenterTianjin 300121China Department of Chemistry University of ManchesterManchester M139PLUK College of Chemistry and Molecular Engineering Beijing National Laboratory for Molecular SciencesPeking UniversityBeijing 100871China Haihe Laboratory of Sustainable Chemical Transformations Tianjin 300192China

Accommodating target analytes within the pores of metal-organic frameworks(MOFs)to improve the sensing performance is an important but challenging ***,we report a novel molecular imprinting strategy to create target recognition sites in a tailored multicomponent MOF with the inter-ligand synergistic antenna effect to lanthanide ions,enabling selective recognition of trace biomarkers,which is critical to the early diagnosis of age-related diseases in blood samples with high sensitivity and ultralow limit of detection(LOD)of 69 nmol L^(-1..Compared with MOF-based sensors without imprinted recognition sites,the significantly enhanced sensing performance(both sensitivity and LOD)was attributed to a dynamic-static coupled sensing mechanism:the dynamic interactions involve concentrating the trace biomarkers at the imprinted recognition sites to enhance the sensing performance at ultralow concentration,and the static interactions are derived from electron/energy exchange between the molecularly imprinted MOF and the biomarker to govern the sensing *** work establishes a new molecular imprinting strategy to attain advanced materials for sensing trace bio-analytes.

关键词： molecularly imprinted metal-organic frameworks dynamic-static coupled sensing biomarker recognition

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The nature, type, and origin of diagenetic uids and their control on the evolving porosity of the Lower Cambrian Xiaoerbulak Formation dolostone, northwestern Tarim Basin, china

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Petroleum Science 2020年第4期17卷 873-895页

作者： Pei-Xian Liu shi-Biao Deng Ping Guan Yi-Qiu Jin Kai {1. Yong-Quan Chen Key Laboratory of Orogenic Belts and Crustal Evolution School of Earth and Space SciencesPeking UniversityBeijing100871China Research Institute of Petroleum Exploration and Development PetroChinaBeijing100083China Research Institute of Petroleum Exploration and Development Tarim Oilfield BranchPetroChinaKorla841000XinjiangChina

The study on Lower Cambrian dolostones in Tarim Basin can improve our understanding of ancient and deeply buried carbonate *** this research,diagenetic fluid characteristics and their control on porosity evolution have been revealed by studying the petrography and in situ geochemistry of different *** types of diagenetic fluids were identified:(1. Replacive dolomites were deviated from shallow burial dolomitizing fluids,which might probably be concentrated ancient seawater at early stage.(2. Fine-to-medium crystalline,planar-e diamond pore-filling dolomites(Fd1. were likely slowly and sufficiently crystallized from deep-circulating crustal hydrothermal fluids during Devonian.(3) Coarse crystalline,non-planar-a saddle pore-filling dolomites(Fd2. might rapidly and insufficiently crystallize from magmatic hydrothermal fluids during *** dolomitizing fluids did not increase the porosity,but transformed the primary pores to dissolution pores through ***-circulating crustal hydrothermal fluids significantly increased porosity in the early stages by dissolving and then slightly decreased the porosity in the late stage due to Fd1.*** hydrothermal fluids only precipitated the Fd2.dolomites and slightly decreased the *** summary,Devonian deep-circulating crustal hydrothermal fluids dominated the porosity evolution of the Lower Cambrian dolostone reservoir in the Tarim Basin.

关键词： Lower Cambrian Dolostone reservoir In situ geochemistry Diagenetic fluids Porosity evolution

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行星际超低噪声三维能量粒子谱仪设计

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地球与行星物理论评（中英文） 2024年第3期55卷 308-316页

作者：于向前王玲华王永福施伟红宗秋刚杨芯王游龙叶雨光陈鸿飞邹鸿北京大学地球与空间科学学院北京100871

太阳系能量粒子的起源和加速一直是空间物理学的重要前沿课题之一.在行星际空间中观测到的太阳系能量粒子主要分为两类:一类是持续存在的“太阳风能量粒子”,另一类是间歇性的“太阳能量粒子事件”.受限于以往行星际粒子探测器的灵敏度... 详细信息

太阳系能量粒子的起源和加速一直是空间物理学的重要前沿课题之一.在行星际空间中观测到的太阳系能量粒子主要分为两类:一类是持续存在的“太阳风能量粒子”,另一类是间歇性的“太阳能量粒子事件”.受限于以往行星际粒子探测器的灵敏度还不足够高,人类迄今仍未洞悉这些能量粒子起源和加速的物理过程与本质.本文设计了技术指标均为国际领先水平的行星际超低噪声三维能量粒子谱仪,采用双端望远镜结构(一端利用薄膜阻挡质子技术实现高灵敏电子探测,另一端利用磁场偏转电子技术实现高灵敏质子探测),结合多层、多像素半导体探测器阵列和覆盖近4π立体角的大视场设计,实现对行星际空间中2.~1.00 keV电子和2.~1.0}00 keV质子的三维分布进行高时间分辨率、高角度分辨率和高能量分辨率探测,用以揭示太阳系能量粒子起源和加速的机理,满足我国行星际探测和即将开展的深空探测的迫切需求.

关键词：太阳系能量粒子行星际能量粒子仪器双端望远镜结构大面积半导体探测器

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In-flight vector magnetometer calibration for FY-3E satellite

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Science china(Technological {1.) 2023年第6期66卷 1867-1868页

作者： wang YongFu YU XiangQian ZONG QiuGang XIAO ChiJie LIU Si CHEN HongFei ZOU Hong {1. WeiHong school of {1. and Space {2. Peking UniversityBeijing 100871China school of Physics Peking UniversityBeijing 100871China school of Physics and Electronic Science Changsha University of Science&TechnologyChangsha 410114China

The FY-3E meteorological satellite was launched by china on July 5,*** orbit of the satellite is sun-synchronous with an orbit altitude 836 km and orbit period 1.{1.*** satellite is equipped with a triaxial anisotropic magnetore-sistance magnetometer to detect ultra-low frequency waves in the *** magnetometer sensor is situated on the satellite *** is approximately 1.m away from the satellite body to reduce the effect of spacecraft fields.

关键词： magnetometer satellite equipped

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In situ cosmogenic ^(1.)Be, ^(2.)Al, and ^(2.)Ne dating in sediments from the Guizhou Plateau, southwest china

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Science china {1. {2. 2021年第8期64卷 1305-1317页

作者： Ye YANG Yu LIU Yan MA Sheng XU Cong-Qiang LIU shi-Jie {1. Finlay M.STUART Derek FABEL Institute of Surface-earth System Science School of Earth System ScienceTianjin UniversityTianjin 300072China Scottish Universities Environmental Research Centre East Kilbride G750QFUK State Key Laboratory of Environmental Geochemistry Institute of GeochemistryChinese Academy of SciencesGuiyang 550081China State Key Laboratory of earthquake Dynamics Institute of GeologyChina Earthquake AdministrationBeijing 100029China

Landscape evolution is modulated by the regional tectonic uplift,climate change,and river ***,how to distinguish these mechanisms through the research of surface exhumation and fluvial incision remains *** this study,cosmogenic ^(1.)Be,^(2.)Al,and ^(2.)Ne concentrations in quartz from cave deposits,modern river sediments,and bedrocks were measured to constrain the applicability of cosmogenic ^(2.)Ne and discuss Quaternary landscape evolution history in the Guizhou Plateau,southeast *** the ^(2.)Al-^(1.)Be and ^(2.)Ne-^(1.)Be pairs to distinguish the cosmogenic ^(2.)Ne concentration from the excess ^(2.)Ne,we found that the nucleogenic ^(2.)Ne produced by the U and Th decay in quartz is significant in the samples although there is the possibility of inherited cosmogenic ^(2.)*** with previous studies,we suggest that the precise approach for applying the cosmogenic ^(2.)Ne could be reached by(1.estimating the contribution from nucleogenic ^(2.)Ne,(2.avoiding samples with complex burial histories to exclude inherited cosmogenic ^(2.)Ne,and(3)combining the ^(1.)Be-^(2.)Al-^(2.)Ne nuclides method for the Quaternary *** addition,both pre-burial basin denudation rates and burial ages derived from the ^(2.)Al-^(1.)Be pair were used to determine the different timescale surface denudation rate and fluvial incision rate in relation to previous *** consistency of the different timescales pre-burial basin denudation rate,^(36)Cl surface denudation rate,and modern basin denudation rate indicates that the landscape-scale surface denudation has been likely stabilized since the Quaternary in the Guizhou Plateau *** slightly higher river incision rates than the local surface denudation rate show that the river dynamics may not have reached a steady-state due to the regional tectonic uplift in the Guizhou Plateau.

关键词： Cosmogenic^(1.)Be-^(2.)Al-^(2.)Ne Burial dating Incision rate Landscape evolution Guizhou Plateau

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Reduction of global natural gas hydrate(NGH)resource estimation and implications for the NGH development in the South china Sea

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Petroleum Science 2022年第1期19卷 3-12页

作者： Xiong-Qi Pang Cheng-Zao Jia Zhang-Xing Chen He-Sheng shi Zhuo-Heng Chen Tao Hu Tong {1. Zhi Xu Xiao-Han Liu Xing-Wen Zhang En-Ze {1. Zhuo-Ya Wu Bo Pang State Key Laboratory of Petroleum resources and Prospecting Beijing102249China College of geosciences China University of Petroleum(Beijing)Beijing102249China china National Petroleum Corporation Beijing100007China Chemical and Petroleum Engineering Schulich School of EngineeringUniversity of CalgaryCalgaryT2N 1N4Canada Shenzhen Branch of china National Offshore Oil Corporation Ltd. GuangzhouGuangdong 510240China Geological Survey of Canada Natural Resources CanadaCalgaryT2L 2A7Canada school of {1.&Space {2. Peking UniversityBeijing100871China

There have been at least 2. groups of estimates on the global natural gas hydrate(NGH)resource since1.73,varying greatly with up to 1.,000 times and showing a decreasing trend with *** the South{1. Sea(SCS),35 groups of estimations were conducted on NGH resource potential since 2.00,while these estimates kept almost the same with time,varying between 60 and 90 billion tons of oil equivalent(toe).What are the key factors controlling the variation trend?What are the implications of these variations for the NGH development in the world and the SCS?By analyzing the investigation characteristics of NGH resources in the world,this study divided the evaluation process into six stages and confirmed four essential factors for controlling the variations of *** indicated that the reduction trend reflects an improved understanding of the NGH formation mechanism and advancement in the resource evaluation methods,and promoted more objective evaluation ***,the analysis process and improved evaluation method was applied to evaluate the NGH resources in the SCS,showing the similar decreasing trend of NGH resources with *** utilizing the decreasing trend model,the predicted recoverable resources in the world and the SCS are(2.5-500)×1.^(1.0}m^(3)and(0.8-6.5)×1.^(1.0}m^(3),respectively,accounting for 2.%of the total conventional oil and gas *** NGH resource in the SCS is only about 4%-6%of the previous estimates of 60-90 billion *** extracted completely,it only can support the sustainable development of{1. for 7 years at the current annual consumption level of oil and *** cannot be the main energy resource in future due to its low resource potential and lack of advantages in recovery.

关键词： Natural gas hydrate Resource evaluation South china Sea Global NGH resource Reduction trend in NGH resource

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Practicable method to identify ferromagnetic objects

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Science china(Technological {1.) 2022年第12期65卷 3079-3081页

作者： YU XiangQian wang YongFu XIAO ChiJie LIU Si ZONG QiuGang CHEN HongFei ZOU Hong {1. WeiHong CHEN Ao school of {1. and Space {2. Peking UniversityBeijing 100871China school of Physics Peking UniversityBeijing 100871China school of Physics and Electronic Science Changsha University of Science&TechnologyChangsha 410114China

Ferromagnetic objects are ubiquitous in the world and the identification of ferromagnetic objects is important in many *** the position and magnetic parameters of the ferromagnetic object from its magnetic signature i... 详细信息

关键词： ferromagnetic signature mining

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Vertical profiles of biogenic volatile organic compounds as observed online at a tower in beijing

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Journal of Environmental sciences 2020年第9期32卷 33-42页

作者： Huina Zhang Yanli Zhang Zhonghui Huang WJoe FActon Zhaoyi wang Eiko Nemitz Ben Langford Neil Mullinger Brian Davison Zongbo {1. Di Liu Wei Song Weiqiang Yang Jianqiang Zeng Zhenfeng Wu Pingqing Fu Qiang Zhang Xinming wang State Key Laboratory of Organic Geochemistry and Guangdong Key Laboratory of Environmental Protection and resources Utilization Guangzhou Institute of GeochemistryChinese Academy of SciencesGuangzhou 510640China Center for Excellence in Regional Atmospheric Environment Institute of Urban Environment Chinese Academy of SciencesXiamen 361021China university of Chinese Academy of {1. Beijing 100049China State Environmental Protection Key Laboratory of Environmental Pollution Health Risk Assessment and Guangdong Key Laboratory of Water and Air Pollution Control South China Institute of Environmental ScienceMinistry of Ecology and EnvironmentGuangzhou 510655China Lancaster Environment Centre Lancaster UniversityLancaster LA14YQUK Centre for Ecology and Hydrology Edinburgh EH260QBUK school of Geography {1. and Environmental {2. University of BirminghamBirmingham B152TTUK Institute of Surface-earth System Science Tianjin UniversityTianjin 300072China Institute of Atmospheric Physics Chinese Academy of SciencesBeijing 100029China beijing Key Laboratory of Green Chemical Reaction Engineering and Technology Department of Chemical EngineeringTsinghua UniversityBeijing 100084China

Vertical profiles of isoprene and monoterpenes were measured by a proton transfer reactiontime of flight-mass spectrometry(PTR-ToF-MS) at heights of 3,1.,32.64,and 1.2.m above the ground on the Institute of Atmospheric Physics(IAP) tower in central beijing during the winter of 2.16 and the summer of *** mixing ratios were larger in summer due to much stronger local emissions whereas monoterpenes were lower in summer due largely to their consumption by much higher levels of *** mixing ratios were the highest at the 32.m in summer(1.64±0.66 ppbV) and at 1. m in winter(1.41.0.64 ppbV) with decreasing concentrations to the ground and to the 1.2.m,indicating emission from the tree canopy of the surrounding *** mixing ratios were the highest at the 3 m height in both the winter(0.71.0.42.ppbV) and summer(0.1.±0.1. ppbV) with a gradual decreasing trend to 1.2.m,indicting an emission from near the ground *** lowest isoprene and monoterpene mixing ratios all occurred at 1.2.m,which were 0.71.0.42.ppbV(winter) and 1.35±0.51.ppbV(summer) for isoprene,and 0.42.0.2. ppbV(winter) and0.07±0.06 ppbV(summer) for *** in the summer and monoterpenes in the winter,as observed at the five heights,showed significant mutual *** the winter monoterpenes were positively correlated with combustion tracers CO and acetonitrile at 3 m,suggesting possible anthropogenic sources.

关键词： winter Vertical mixing

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Shape and position of earth's bow shock near-lunar orbit based on ARTEMIS data

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Science china {1. {2. 2016年第8期59卷 1700-1706页

作者： LIU Ji shi QuanQi TIAN AnMin Lü JianYong WU Hao {1. Ming FU SuiYan YANG YuChen ZONG QiuGang ZHANG Jiang FENG YongYong PU ZuYin school of Space Science and Physics Shandong UniversityWeihai 264209China State Key Laboratory of Space Weather Chinese Academy of SciencesBeijing 100190China Institute of Space Weather Nanjing University of Information Science and TechnologyNanjing 210044China school of {1. and Space {2. Peking UniversityBeijing 100871China

earth's bow shock is the result of interaction between the supersonic solar wind and earth's magnetopause. However, data limitations mean the model of the shape and position of the bow shock are based largely on near-earth satellite data. The model of the bow shock in the distant magnetotail and other factors that affect the bow shock, such as the interplanetary magnetic field(IMF) B_y, remain unclear. Here, based on the bow shock crossings of ARTEMIS from January 2.11.to January 2.15, new coefficients of the tail-flaring angle a of the Chao model(one of the most accurate models currently available) were obtained by fitting data from the middle-distance magnetotail(near-lunar orbit, geocentric distance -2.R_E>X>-50R_E). In addition, the effects of the IMF B_y on the flaring angle a were analyzed. Our results showed that:(1. the new fitting coefficients of the Chao model in the middle-distance magnetotail are more consistent with the observed results;(2. the tail-flaring angle a of the bow shock increases as the absolute value of the IMF B_y increases. Moreover, positive IMF B_y has a greater effect than negative IMF B_y on flaring angle. These results provide a reference for bow shock modeling that includes the IMF B_y.

关键词： Bow shock Interplanetary magnetic field(IMF) Magnetosphere Solar wind

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