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| 1 | Impacts of climate variability and extremes on global net primary production in the first decade of the 21st century显示文摘许多研究估计了全球陆上的网的大小主要生产(NPP ) ,而是它的变化,空间地并且时间地,仍然保持不明确。由使用一个改进基于过程的陆上的生态系统模型( DLEM ,动态陆地生态系统模型),我们提供多重环境因素导致的全球陆上的 NPP 的估计并且在整个 第21 世纪的第一十年在生物群系和全球层次并且沿着纬度检验陆上的 NPP 的反应到气候可变性。模型模拟在 20002009 期间估计 54.6 Pg C 年 1 的平均全球陆上的 NPP,从 2002 ~ 56.4 Pg C 的干燥的年里的 52.8 Pg C 年 1 变化 2008 的湿年里的年 1 。在湿年里,与十的平均数相比的陆上的 NPP 的大增加在 Amazonia,非洲和澳大利亚是流行的。在干燥的年里,然而,我们与十的平均数相比在全球陆上的 NPP 发现了 3.2% 减小,首先由于在热带区域的有限潮湿供应。在全球水平,降水在陆上的 NPP 解释了约 63% 变化,当剩余的在温度和另外的环境因素被归因于变化时。降水是在低纬度的区域在陆上的 NPP 决定内部年度的变化的主要因素。在中间纬度、高纬度的区域,然而,温度可变性大部分控制了陆上的 NPP 的大小。我们的结果暗示温暖并且增加气候极端事件的那投射气候将改变大小和全球陆上的 NPP 的空间与时间的模式。 | PAN Shufen TIAN Hanqin DANGAL Shree R.S. OUYANG Zhiyun LU Chaoqun YANG Jia TAO Bo REN Wei BANGER Kamaljit YANG Qichun ZHANG Bowen | 2015 | Journal of Geographical Sciences2015，25，9： | 15 |
| 2 | Global methane and nitrous oxide emissions from terrestrial ecosystems due to multiple environmental changes显示文摘Greenhouse gas(GHG)-induced climate change is among the most pressing sustainability challenges facing humanity today,posing serious risks for ecosystem health.Methane(CH_(4))and nitrous oxide(N_(2)O)are the two most important GHGs after carbon dioxide(CO_(2)),but their regional and global budgets are not well known.In this study,we applied a process-based coupled biogeochemical model to concurrently estimate the magnitude and spatial and temporal patterns of CH_(4)and N_(2)O fluxes as driven by multiple environmental changes,including climate variability,rising atmospheric CO_(2),increasing nitrogen deposition,tropospheric ozone pollution,land use change,and nitrogen fertilizer use.The estimated CH_(4)and N_(2)O emissions from global land ecosystems during 1981-2010 were 144.39±12.90 Tg C/yr(mean 62 SE;1 Tg=1012 g)and 12.52±0.74 Tg N/yr,respectively.Our simulations indicated a significant(P,0.01)annually increasing trend for CH_(4)(0.43±0.06 Tg C/yr)and N_(2)O(0.14±0.02 Tg N/yr)in the study period.CH_(4)and N_(2)O emissions increased significantly in most climatic zones and continents,especially in the tropical regions and Asia.The most rapid increase in CH_(4)emission was found in natural wetlands and rice fields due to increased rice cultivation area and climate warming.N_(2)O emission increased substantially in all the biome types and the largest increase occurred in upland crops due to increasing air temperature and nitrogen fertilizer use.Clearly,the three major GHGs(CH_(4),N_(2)O,and CO_(2))should be simultaneously considered when evaluating if a policy is effective to mitigate climate change. | Hanqin Tian Guangsheng Chen Chaoqun Lu Xiaofeng Xu Wei Ren Bowen Zhang Kamaljit Banger Bo Tao Shufen Pan Mingliang Liu Chi Zhang Lori Bruhwiler Steven Wofsy | 2015 | Ecosystem Health and Sustainability2015，1，1： | 7 |
| 3 | Climate extremes and ozone pollution:a growing threat to China’s food security显示文摘Ensuring global food security requires a sound understanding of climate and environmental controls on crop productivity.The majority of existing assessments have focused on physical climate vari-ables(i.e.,mean temperature and precipitation),but less on the increasing climate extremes(e.g.,drought)and their interactions with increasing levels of tropospheric ozone(O3).Here we quantify the combined impacts of drought and O3 on China’s crop yield using a comprehensive,process-based agricultural eco-system model in conjunction with observational data.Our results indicate that climate change/variability and O3 together led to an annual mean reduction of crop yield by 10.0%or 55 million tons per year at the national level during 1981-2010.Crop yield shows a growing threat from severe episodic droughts and in-creasing O3 concentrations since 2000,with the largest crop yield losses occurring in northern China,causing serious concerns in food supply security in China.Our results imply that reducing tropospheric O3 levels is critical for securing crop production in coping with increasing frequency and severity of extreme climate events such as droughts.Improving air quality should be a core component of climate adaptation strategies. | Hanqin Tian Wei Ren Bo Tao Ge Sun Art Chappelka Xiaoke Wang Shufen Pan Jia Yang Jiyuan Liu Ben SFelzer Jerry MMelillo John Reilly | 2016 | Ecosystem Health and Sustainability2016，2，1： | 1 |
| 4 | Responses of global terrestrial water use efficiency to climate change and rising atmospheric CO_(2)concentration in the twenty-first century显示文摘Terrestrial ecosystems play a significant role in global carbon and water cycles because of the substantial amount of carbon assimilated through net primary production and large amount of water loss through evapotranspiration(ET).Using a process-based ecosystem model,we investigate the potential effects of climate change and rising atmospheric CO_(2)concentration on global terrestrial ecosystem water use efficiency(WUE)during the twenty-first century.Future climate change would reduce global WUE by 16.3%under high-emission climate change scenario(A2)and 2.2%under low-emission climate scenario(B1)during 2010–2099.However,the combination of rising atmospheric CO_(2)concentration and climate change would increase global WUE by 7.9%and 9.4%under A2 and B1 climate scenarios,respectively.This suggests that rising atmospheric CO_(2)concentration could ameliorate climate change-induced WUE decline.Future WUE would increase significantly at the high-latitude regions but decrease at the low-latitude regions under combined changes in climate and atmospheric CO_(2).The largest increase of WUE would occur in tundra and boreal needleleaf deciduous forest under the combined A2 climate and atmospheric CO_(2)scenario.More accurate prediction of WUE requires deeper understanding on the responses of ET to rising atmospheric CO_(2)concentrations and its interactions with climate. | Shufen Pan Guangsheng Chen Wei Ren Shree R.S.Dangal Kamaljit Banger Jia Yang Bo Tao Hanqin Tian | 2018 | International Journal of Digital Earth2018，11，6： | 1 |
| 5 | Can microplastics mediate soil properties,plant growth and carbon/nitrogen turnover in the terrestrial ecosystem?显示文摘Microplastic(MP)pollution,a global environmental problem,has been recently studied in marine and freshwater environments.However,our understanding of MP effect on terrestrial ecosystems,especially carbon(C)and nitrogen(N)turnover remains poor.This review summarizes the sources and distribution characteristics of MPs in terrestrial ecosystems and explores their effects on soil properties,plant growth,C and N turnover.Once entering the terrestrial ecosystem,MPs could involve in sequestrating carbon and nitrogen by changing soil properties(e.g.,pH,soil aggregate stability,and soil porosity).MPs could exert direct influences on plants or on soil physical environment and microbial metabolic environment to indirectly affect plant growth,thus altering the quantity and quality of soil C and N inputs by shifts in plant litter and roots.The changes of the dominant bacteria phyla,related functional genes,and enzymes caused by MP pollution could affect C and N cycles.Additionally,the MP effect varies with its properties(e.g.,types,shapes,elemental composition,functional groups,released additives).Future researches should unify the standard system of MP separation,detection,and reveal the ecological effects of MPs,especially their impacts on terrestrial carbon and nitrogen cycles in the context of climate changes. | Yao Yao Wang Lili Pan Shufen Li Gang Liu Hongmei Xiu Weiming Gong Lingxuan Zhao Jianning Zhang Guilong Yang Dianlin | 2022 | Ecosystem Health and Sustainability2022，8，1： | 1 |
| 6 | Atomic scale visualizations of low-angle grain boundary mediated plasticity by coupled dislocation climb and glide in nanoporous gold显示文摘Grain boundaries(GBs),as a prevalent structural characteristic,play a crucial role in the deformation of nanoporous metals with nanosized grains and ligaments.However,the fundamental understanding of GB-mediated deformation is still lacking because the plastic behavior of discrete ligaments involving GBs remains to be unknown.Here,we report atomic scale visualizations of coupled GB dislocation climb and glide in nanoporous gold ligaments with low-angle GBs via in situ tensile straining inside a Cs-corrected transmission electron microscope.The zig-zag motion paths of GB dislocations are precisely determined by real-time tracking of the movements of dislocation cores.The concurrent climb and glide of the dislocation arrays are confined to a narrow GB region,greatly enhancing GB diffusion in the bicrystal ligament.Our findings of coupled dislocation climb and glide shine a light on the room-temperature deformation of nanoporous metals and provide a time-dependent atomic-level physical image for GB engineering. | Shufen Chu Junnan Jiang Xiaoran Zhao Baode Sun Pan Liu | 2023 | Nano Research2023，16，2： | 1 |
| 7 | Effects of Forest Regrowth and Urbanization on Ecosystem Carbon Storage in a Rural-Urban Gradient in the Southeastern United States显示文摘 | ZHANG Chi TIAN Hanqin PAN Shufen | 2008 | Ecosystems2008，，： | 1 |
| 8 | Multi-chain Fudan-CCDC model for COVID-19—a revisit to Singapore's case显示文摘Background:COVID-19 has been impacting on the whole world critically and constantly since late December 2019.Rapidly increasing infections has raised intense worldwide attention.How to model the evolution of COVID-19 effectively and efficiently is of great significance for prevention and control.Methods:We propose the multi-chain Fudan-CCDC model based on the original single-chain model in[Shao et al.2020]to describe the evolution of COVID-19 in Singapore.Multi-chains can be considered as the superposition of several single chains with different characteristics.We identify the parameters of models by minimizing the penalty function.Results:The numerical simulation results exhibit the multi-chain model performs well on data fitting.Though unsteady the increments are,they could still fall within the range of±30%fluctuation from simulation results.Conclusion:The multi-chain Fudan-CCDC model provides an effective way to early detect the appearance of imported infectors and super spreaders and forecast a second outbreak.It can also explain the data from those countries where the single-chain model shows deviation from the data. | Hanshuang Pan Nian Shao Yue Yan Xinyue Luo Shufen Wang Ling Ye Jin Cheng Wenbin Chen | 2020 | Quantitative Biology2020，8，4： | 1 |
| 9 | Methane emissions from livestock in East Asia during 1961−2019显示文摘Context:East Asia is a crucial region in the global methane(CH4)budget,with significant contributions from the livestock sector.However,the long-term trend and spatial pattern of CH4 emissions from livestock in this region have not been fully assessed.Methods:Here,we estimate CH4 emissions from 10 categories of livestock in East Asia during 1961-2019 following the Tier 2 approaches suggested by the 2019 Refinement to the IPCC 2006 Guidelines.Results:livestock-sourced CH4 emission in 2019 was 13.22[11.42-15.01](mean[minimum%maximum of 95-confidence interval]Tg CH4 yr-1,accounting for an increase of 231%since 1961.The contribution of slaughtered populations to total emissions increased from 3%in 1961 to 24%in 2019.Spatially,the emission hotspots were mostly distributed in eastern China,South Korea,and parts of Japan,but they tend to shift northward after 2000.Conclusion:It is necessary to use dynamic emission factors and include slaughtered populations in the estimation of livestock CH4 emissions.Regions including Northern China,Mongolia,and South Korea deserve more attention in future CH4 mitigation efforts. | Lei Zhang Hanqin Tian Hao Shi Shufen Pan Xiaoyu Qin Naiqing Pan Shree R.S.Dangal | 2021 | Ecosystem Health and Sustainability2021，7，1： | 1 |
| 10 | Recent patterns of terrestrial net primary production in Africa influenced by multiple environmental changes显示文摘Terrestrial net primary production(NPP)is of fundamental importance to food security and ecosystem sustainability.However,little is known about how terrestrial NPP in African ecosystems has responded to recent changes in climate and other environmental factors.Here,we used an integrated ecosystem model(the dynamic land ecosystem model;DLEM)to simulate the dynamic variations in terrestrial NPP of African ecosystems driven by climate and other environmental factors during 1980-2009.We estimate a terrestrial NPP of 10.22(minimum-maximum range of 8.9-11.3)Pg C/yr during the study period.Our results show that precipitation variability had a significant effect on terrestrial NPP,explaining 74%of interannual variations in NPP.Over the 30-yr period,African ecosystems experienced an increase in NPP of 0.03 Pg C/yr,resulting from the combined effects of climate variability,elevated atmospheric CO_(2)concentration,and nitrogen deposition.Our further analyses show that there is a difference in NPP of 1.6 Pg C/yr between wet and dry years,indicating that interannual climatic variations play an important role in determining the magnitude of terrestrial NPP.Central Africa,dominated by tropical forests,was the most productive region and accounted for 50%of the carbon sequestered as NPP in Africa.Our results indicate that warmer and wetter climatic conditions,together with elevated atmospheric CO_(2)concentration and nitrogen deposition,have resulted in a significant increase in African terrestrial NPP during 1980-2009,with the largest contribution from tropical forests. | Shufen Pan Shree R.S.Dangal Bo Tao Jia Yang Hanqin Tian | 2015 | Ecosystem Health and Sustainability2015，1，5： | 0 |
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