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Carbon Productivity Analysis to Address Global Climate Change 被引量:5
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作者 He Jiankun Su Mingshan 《Chinese Journal of Population,Resources and Environment》 2011年第1期9-15,共7页
Developing low-carbon economy and enhancing carbon productivity are basic approaches to coordinating economic development and protecting global environment, which are also the major ways to address climate change unde... Developing low-carbon economy and enhancing carbon productivity are basic approaches to coordinating economic development and protecting global environment, which are also the major ways to address climate change under the framework of sustainable development. In this paper, the authors analyze the annual rate of carbon productivity growth, the differences of carbon productivity of different countries, and the factors for enhancing carbon productivity. Consequently, the authors clarify their viewpoint that the annual rate of carbon productivity growth can be used to weigh the efforts that a country takes to address climate change, and propose policies and suggestions on promoting carbon production. 展开更多
关键词 carbon productivity annual rate of carbon productivity growth global climate change greenhouse gas reduction
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Markers for Global Climate Change and Its Impact on Social, Biological and Ecological Systems: A Review 被引量:3
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作者 Ravi Kant Upadhyay 《American Journal of Climate Change》 2020年第3期159-203,共45页
Present article sketches out major climate induced changes in marine, aquatic and terrestrial life. Few important biomarkers such as ecological, meteorological, socioeconomic, thermal, biophysical and biological, beha... Present article sketches out major climate induced changes in marine, aquatic and terrestrial life. Few important biomarkers such as ecological, meteorological, socioeconomic, thermal, biophysical and biological, behavioral markers of climate change and global environmental stress have been highlighted to predict the future challenges and finding appropriate solutions. Though, so many climate change induced effects are visible but few unpredictable effects may be seen in future. Therefore, all such effects have been acknowledged, and tried to find appropriate solutions. Most visible effect is collection of high amounts of carbon dioxide in the atmosphere which is responsible for green house effect and causing natural calamities round the globe. It is not only jeopardized the survival of terrestrial, fresh water animals mainly planktons, bottom dwellers;coral reefs, algae, fish fauna in marine environment belong to different taxon but also responsible for disruption of ocean’s food web due to non-assimilation of extra carbon dioxide by the ocean water. There is a sharp decline in fresh water and sea shore micro-flora and micro-fauna. Other major visible effects are loss of biodiversity, depletion of forests, land degradation, severe floods and draughts. On other hand sudden changes in weather conditions causing irreparable devastations due to hurricanes and typhoons, storms, lightening, earthquakes and tsunamis are normally on rise. Both economic and ecological breakdowns are occurring more frequently which are more impactful and persistent. Climate change is major human health stressor;it is making fragmentation of socio-cultural bonds and reducing fertility of soil finally crop production. Climate change is imposing non-adaptive forced human migration, territorial conflicts, decreasing ecosystem productivity, disease out breaks, and impelling unequal resource utilization. 展开更多
关键词 global climate change Biodiversity Loss Loss of Life HABITAT Economic Losses Biomarkers Challenges and Solutions
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GLOBAL CLIMATE CHANGES AND THE TOURISM OF CHINA 被引量:2
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作者 Ren Guoyu(National Climate Center, Beijing 100081People’s Republic of China) 《Journal of Geographical Sciences》 SCIE CSCD 1996年第2期97-102,共6页
The future global climate changes induced by the increased atmospheric CO2 concentration is receiving much attention from the scientific community as well as the public. Model simulations and palaeoclimatic data studi... The future global climate changes induced by the increased atmospheric CO2 concentration is receiving much attention from the scientific community as well as the public. Model simulations and palaeoclimatic data studies show an evident change in temperature and precipitation over China will occur under conditions of the global warming. Possible scenarios of the future climates are given here for China on the basis of synthesizing model simulations and palaeoclimatic data. Most parts of China will experience an increase in temperature, but the warming may be more remarkable in winter in h1e northern half of the country. Increase in precipitation will be seen in nearly every parts of the eastern China, and it will be larger in North and Northeast China. Impacts of the climate changes on the national tourism are assessed. Regions suitable for tourisin development in terms of climate comfortable index will shift northward. Some scenic spots and toruism facilities will be damaged due to sea level rise and increased rainfall. Some regions will benefit from the dimate change, but the tourism industry as a whole will be negatively affected. 展开更多
关键词 IPCC global climate changeS AND THE TOURISM OF CHINA
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Relationship of underground water level and climate in Northwest China’s inland basins under the global climate change:Taking the Golmud River Catchment as an example 被引量:2
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作者 Jia-wei Wang Jin-ting Huang +2 位作者 Tuo Fang Ge Song Fang-qiang Sun 《China Geology》 2021年第3期402-409,共8页
To identify the response of groundwater level variation to global climate change in Northwest China’s inland basins,the Golmud River Catchment was chosen as a case in this paper.Approaches of time series analysis and... To identify the response of groundwater level variation to global climate change in Northwest China’s inland basins,the Golmud River Catchment was chosen as a case in this paper.Approaches of time series analysis and correlation analysis were adopted to investigate the variation of groundwater level influenced by global climate change from 1977 to 2017.Results show that the temperature in the Golmud River Catchment rose 0.57℃ every 10 years.It is highly positive correlated with global climate temperature,with a correlation coefficient,0.87.The frequency and intensity of extreme precipitation were both increased.Generally,groundwater levels increased from 1977 to 2017 in all phreatic and confined aquifers and the fluctuation became more violent.Most importantly,extreme precipitation led to the fact that groundwater level rises sharply,which induced city waterlogging.However,no direct evidence shows that normal precipitation triggered groundwater level rise,and the correlation coefficients between precipitation data from Golmud meteorological station located in the Gobi Desert and groundwater level data of five observation wells are 0.13,0.02,−0.11,0.04,and−0.03,respectively.This phenomenon could be explained as that the main recharge source of groundwater is river leakage in the alluvial-pluvial Gobi plain because of the high total head of river water and goodness hydraulic conductivity of the vadose zone.Data analysis shows that glacier melting aggravated because of local temperature increased.As a result,runoff caused groundwater levels to ascend from 1977 to 2017.Correlation coefficients of two groundwater wells observation data and runoff of Golmud River are 0.80 and 0.68.The research results will contribute to handling the negative effects of climate change on groundwater for Northwestern China. 展开更多
关键词 Groundwater level variation global climate change Inland basin Golmud River Catchment Qaidam Basin Northeastern Qinghai-Tibet Plateau
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Polar Glacial Fluctuation Is an important Factor of Global Climate Change 被引量:1
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作者 Cuixiang Zhong 《Journal of Environmental Science and Engineering(A)》 2020年第5期163-169,共7页
Global climate change has attracted more and more attention from all over the world,and how to cope with global climate change has aroused wide debate and research.Although many people believe that global warming is c... Global climate change has attracted more and more attention from all over the world,and how to cope with global climate change has aroused wide debate and research.Although many people believe that global warming is caused by releasing too much greenhouse gas,there are still controversies in the scientific community.Thus,the author has analyzed various factors affecting global climate change to find that polar glacial fluctuation affects the activities of polar vortices and that the activities of the Moon and polar vortices directly cause global climate change,therefore can conclude that the change of polar glaciers is the main factor affecting the global climate change and put forward corresponding countermeasures to prevent global climate change. 展开更多
关键词 Polar vortex MOON global climate change CAUSE COUNTERMEASURE
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Salt Desert and Saline-Ackaline Mixed Dust Storms:An Ignored Issure for Global Climate Change
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作者 SONG Huailong 《Acta Geologica Sinica(English Edition)》 SCIE CAS CSCD 2014年第S1期196-197,共2页
Salt desert,saline-alkaline dust storm and saline-alkaline mixed dust storm are significant but ignored problems for a long time.After many years of observations and researches,the author believes that salt desert,sal... Salt desert,saline-alkaline dust storm and saline-alkaline mixed dust storm are significant but ignored problems for a long time.After many years of observations and researches,the author believes that salt desert,saline-alkaline dust 展开更多
关键词 salt desert saline-alkaline(mixed) dust storms influence and harm the pattern of global desertification global climate change.
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The global climate change and forest prediction in China
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作者 Jiang YouxuForestry Institute, Chinese Academy of Forestry, Beijing 100091, China 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 1994年第3期310-321,共12页
The climate change prediction in China based on OCU model as well as summary ana-lyses of GFDL, GISS, NCAR, OCU and UKMO models are used for discussing the approaches topredict the response of the forest in China unde... The climate change prediction in China based on OCU model as well as summary ana-lyses of GFDL, GISS, NCAR, OCU and UKMO models are used for discussing the approaches topredict the response of the forest in China under double concentration of atmospheric carbondioxide after about 2020. The growth, production and distribution boundary of Chinese fir(Cunninghamia lanceolata), the tree composition and their growth in cold temperete Daxingan Moun-tain region, and potential forest zones in China are discussed in this paper as example. 展开更多
关键词 global climate change forest in China prediction.
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Global Climate Change and China's Green Development
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作者 Hu Angang 《Chinese Journal of Population,Resources and Environment》 2011年第4期9-15,共7页
For China, green industrial revolution induced by global climate change poses not only the greatest challenge, but also the greatest opportunity. In the perspective of China's basic national conditions, and especi... For China, green industrial revolution induced by global climate change poses not only the greatest challenge, but also the greatest opportunity. In the perspective of China's basic national conditions, and especially its natural conditions, China's green development is the inevitable path of choice for the realization of sustainable development and scientific development. The essence of China's modernization 2050 is green modernization, taking the three-step strategy towards China's own green development and energy conservation and emission reduction. In combination with the 12 th Five Year Plan, its innovative positioning is "green development plan". 展开更多
关键词 global climate change green industrial revolution China's green development green modernization green development plan
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Impacts of global climate change on birds and marine mammals in Antarctica
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作者 WU Fuxing DONE Lu +1 位作者 ZHANG Yanyun ZHANG Zhengwang 《Advances in Polar Science》 2017年第1期1-12,共12页
Birds and marine mammals in Antarctica, especially penguins and seals, are top consumers and critical elements of the Southem Ocean ecosystem. As a region undergoing rapid global change, new challenges will be posed t... Birds and marine mammals in Antarctica, especially penguins and seals, are top consumers and critical elements of the Southem Ocean ecosystem. As a region undergoing rapid global change, new challenges will be posed to the survival of these vertebrates species. Global climate change causes many alterations, such as ocean temperature rise, altered sea ice distribution, and abnormal climate events along with effects of intensive human activities, such as fishing. These not only directly affect the spatiotemporal distributions and population dynamics of Antarctic birds and marine mammals but also indirectly influence them via modification of their food resources. At present, the impact of climate change on birds and marine mammals in the Antarctica is focusing on a number of species in a few areas. Response mechanisms of these species are still very limited and therefore require further long-term and continuous monitoring and research. 展开更多
关键词 ANTARCTICA BIRDS marine mammal global climate change
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Global Effect of Climate Change on Seasonal Cycles,Vector Population and Rising Challenges of Communicable Diseases:A Review
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作者 Nidhi Yadav Ravi Kant Upadhyay 《Journal of Atmospheric Science Research》 2023年第1期21-59,共39页
This article explains ongoing changes in global climate and their effect on the resurgence of vector and pathogen populations in various parts of the world.Today,major prevailing changes are the elevation of global te... This article explains ongoing changes in global climate and their effect on the resurgence of vector and pathogen populations in various parts of the world.Today,major prevailing changes are the elevation of global temperature and accidental torrent rains,floods,droughts,and loss of productivity and food commodities.Due to the increase in water surface area and the longer presence of flood water,the breeding of insect vectors becomes very high;it is responsible for the emergence and re-emergence of so many communicable diseases.Due to the development of resistance to chemicals in insect pests,and pathogens and lack of control measures,communicable zoonotic diseases are remerging with high infectivity and mortality.This condition is becoming more alarming as the climate is favoring pathogen-host interactions and vector populations.Rapid changes seen in meteorology are promoting an unmanageable array of vector-borne infectious diseases,such as malaria,Japanese encephalitis,filarial,dengue,and leishmaniasis.Similarly,due to unhygienic conditions,poor sanitation,and infected ground and surface water outbreak of enteric infections such as cholera,vibriosis,and rotavirus is seen on the rise.In addition,parasitic infection ascariasis,fasciolosis,schistosomiasis,and dysentery cases are increasing.Today climate change is a major issue and challenge that needs timely quick solutions.Climate change is imposing non-adaptive forced human migration territorial conflicts,decreasing ecosystem productivity,disease outbreaks,and impelling unequal resource utilization.Rapid climate changes,parasites,pathogens,and vector populations are on the rise,which is making great threats to global health and the environment.This article highlighted the necessity to develop new strategies and control measures to cut down rising vector and pathogen populations in endemic areas.For finding quick solutions educational awareness,technology up-gradation,new vaccines,and safety measures have to be adopted to break the cycle of dreadful communicable diseases shortly. 展开更多
关键词 global climate change Biodiversity loss Loss of life HABITAT Economic losses Biomarkers Challenges and solutions
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Review on carbon emissions, energy consumption and low-carbon economy in China from a perspective of global climate change 被引量:5
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作者 沈镭 孙艳芝 《Journal of Geographical Sciences》 SCIE CSCD 2016年第7期855-870,共16页
Accompanying the rapid growth of China's population and economy, energy consumption and carbon emission increased significantly from 1978 to 2012. China is now the largest energy consumer and CO2 emitter of the wo... Accompanying the rapid growth of China's population and economy, energy consumption and carbon emission increased significantly from 1978 to 2012. China is now the largest energy consumer and CO2 emitter of the world, leading to much interest in researches on the nexus between energy consumption, carbon emissions and low-carbon economy. This article presents the domestic Chinese studies on this hotpot issue, and we obtain the following findings. First, most research fields involve geography, ecology and resource economics, and research contents contained some analysis of current situation, factors decomposition, predictive analysis and the introduction of methods and models. Second, there exists an inverted "U-shaped" curve connection between carbon emission, energy consumption and economic development. Energy consumption in China will be in a low-speed growth after 2035 and it is expected to peak between 6.19–12.13 billion TCE in 2050. China's carbon emissions are expected to peak in 2035, or during 2020 to 2045, and the optimal range of carbon emissions is between 2.4–3.3 PgC/year(1 PgC=1 billion tons C) in 2050. Third, future research should be focused on global carbon trading, regional carbon flows, reforming the current energy structure, reducing energy consumption and innovating the low-carbon economic theory, as well as establishing a comprehensive theoretical system of energy consumption, carbon emissions and low-carbon economy. 展开更多
关键词 carbon emissions energy consumption low-carbon economy global climate change
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Impact of global climate change on the health,welfare and productivity of intensively housed livestock 被引量:3
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作者 Tadeusz Kuczynski Victoria Blanes-Vidal +5 位作者 Baoming Li Richard S.Gates Irenilza de Alencar Nääs Daniella J.Moura Daniel Berckmans Thomas M.Banhazi 《International Journal of Agricultural and Biological Engineering》 SCIE EI CAS 2011年第2期1-22,共22页
Major scientific studies have shown that global warming(i.e.increasing average temperature of the Earth)is now a reality.The aims of this paper are to broadly review the underlining causes of global warming,the genera... Major scientific studies have shown that global warming(i.e.increasing average temperature of the Earth)is now a reality.The aims of this paper are to broadly review the underlining causes of global warming,the general effects of global warming on social and environmental systems and the specific effects of resulting from global warming phenomena severe fluctuations in weather patterns,particularly heat waves on livestock health,welfare and productivity.Finally this article aims to summarise some common sense climate control methods and more importantly to highlight the required future research and development(R&D)work that is necessary to achieve a new level of building environment control capability,and thus ensure that the intensive livestock industries will be able to cope with the changed external climate.With the increasing temperatures on a global scale,the most direct effect of the high temperature on the animals is heat stress,which has been proven to have a variety of negative effects on animal health,welfare and productivity.Different potential measures could be taken in future to alleviate the increased heat stress.Some of these measures are mere adaptations or improvements of current engineering solutions.However,facing the complex challenges of global warming and particularly resulting from it the rapid increase of the number of consecutive days with significantly higher than average temperatures will probably require novel solutions,including new designs based on solid engineering judgment,development of new engineering standards and codes to guide designs,the exploration of new and superior building materials,the need for better energy management,and the development of substantially more“intelligent”control systems that will balance changing exterior disturbances,interior building loads and demands to the biological needs of the occupants of the structures. 展开更多
关键词 LIVESTOCK global climate change greenhouse effect animal welfare heat stress temperature COOLING agricultural buildings
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A Middle Pleistocene Glaciation Record from Lacustrine Sediments in the Western Tibetan Plateau and Discussion on Climate Change
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作者 ZHAO Zhenming JI Wenhua FU Chaofeng 《Acta Geologica Sinica(English Edition)》 SCIE CAS CSCD 2023年第2期623-635,共13页
The Tibetan Plateau is an important area for studying global climate change,but the answers to many scientific problems remain unknown.Here,we present new information from the lacustrine sedimentary record in the west... The Tibetan Plateau is an important area for studying global climate change,but the answers to many scientific problems remain unknown.Here,we present new information from the lacustrine sedimentary record in the western Tibetan Plateau,related to the third most-recent glaciations.Continuous sediment data,including sporopollen,particle size,total organic carbon,mass susceptibility,CaCO_(3),CaSO_(4),BaSO_(4)contents and chronological data,were reconstructed and revealed that climate and environmental conditions obviously and distinctly changed between 600 and 700 thousand years ago.In comparison,the data obtained from the Guliya ice core in this area also corresponds to the global glacial climatic characteristics recorded in basin sediments in the eastern and southeastern regions of the plateau and to the information obtained from ice cores in the Antarctic and Arctic regions.In this study,we conclude that the main reason for the glaciations and new tectonic movement must be a geomagnetic polarity reversal 774 thousand years ago(from Matuyama to Brunhes).Indeed,the results of this study suggest that the described reversal event might have influenced the current global climate pattern and will continue to impact climatic changes in the future. 展开更多
关键词 glacial record global climate change geomagnetic polarity reversal middle Pleistocene western Tibetan Plateau
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Climate change impacts the distribution of Quercus section Cyclobalanopsis(Fagaceae),a keystone lineage in East Asian evergreen broadleaved forests
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作者 Lin Lin Xiao-Long Jiang +2 位作者 Kai-Qi Guo Amy Byrne Min Deng 《Plant Diversity》 SCIE CAS CSCD 2023年第5期552-568,共17页
East Asian evergreen broadleaved forests(EBFLs) harbor high species richness,but these ecosystems are severely impacted by global climate change and deforestation.Conserving and managing EBLFs requires understanding d... East Asian evergreen broadleaved forests(EBFLs) harbor high species richness,but these ecosystems are severely impacted by global climate change and deforestation.Conserving and managing EBLFs requires understanding dominant tree distribution dynamics.In this study,we used 29 species in Quercus section Cyclobalanopsis-a keystone lineage in East Asian EBLFs-as proxies to predict EBLF distribution dynamics using species distribution models(SDMs).We examined climatic niche overlap,similarity,and equivalency among seven biogeographical regions’ species using’ecospat’.We also estimated the effectiveness of protected areas in the predicted range to elucidate priority conservation regions.Our results showed that the climatic niches of most geographical groups differ.The western species under the Indian summer monsoon regime were mainly impacted by temperature factors,whereas precipitation impacted the eastern species under the East Asian summer monsoon regime.Our simulation predicted a northward range expansion of section Cyclobalanopsis between 2081 and 2100,except for the ranges of the three Himalayan species analyzed,which might shrink significantly.The greatest shift of highly suitable areas was predicted for the species in the South Pacific,with a centroid shift of over 300 km.Remarkably,only 7.56% of suitable habitat is currently inside protected areas,and the percentage is predicted to continue declining in the future.To better conserve Asian EBLFs,establishing nature reserves in their northern distribution ranges,and transplanting the populations with predicted decreasing numbers and degraded habitats to their future highly suitable areas,should be high-priority objectives. 展开更多
关键词 Species distribution model(SDM) East Asian tropics and subtropics Biodiversity conservation Distribution dynamics global climate change
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Climate Change of 4℃ Global Warming above Pre-industrial Levels 被引量:6
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作者 Xiaoxin WANG Dabang JIANG Xianmei LANG 《Advances in Atmospheric Sciences》 SCIE CAS CSCD 2018年第7期757-770,共14页
Using a set of numerical experiments from 39 CMIP5 climate models, we project the emergence time for 4?C global warming with respect to pre-industrial levels and associated climate changes under the RCP8.5 greenhouse... Using a set of numerical experiments from 39 CMIP5 climate models, we project the emergence time for 4?C global warming with respect to pre-industrial levels and associated climate changes under the RCP8.5 greenhouse gas concentration scenario. Results show that, according to the 39 models, the median year in which 4?C global warming will occur is 2084.Based on the median results of models that project a 4?C global warming by 2100, land areas will generally exhibit stronger warming than the oceans annually and seasonally, and the strongest enhancement occurs in the Arctic, with the exception of the summer season. Change signals for temperature go outside its natural internal variabilities globally, and the signal-tonoise ratio averages 9.6 for the annual mean and ranges from 6.3 to 7.2 for the seasonal mean over the globe, with the greatest values appearing at low latitudes because of low noise. Decreased precipitation generally occurs in the subtropics, whilst increased precipitation mainly appears at high latitudes. The precipitation changes in most of the high latitudes are greater than the background variability, and the global mean signal-to-noise ratio is 0.5 and ranges from 0.2 to 0.4 for the annual and seasonal means, respectively. Attention should be paid to limiting global warming to 1.5?C, in which case temperature and precipitation will experience a far more moderate change than the natural internal variability. Large inter-model disagreement appears at high latitudes for temperature changes and at mid and low latitudes for precipitation changes. Overall, the intermodel consistency is better for temperature than for precipitation. 展开更多
关键词 4℃ global warming timing climate change signal-to-noise ratio uncertainty
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From Climate to Global Change:Following the Footprint of Prof.Duzheng YE's Research 被引量:1
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作者 Congbin FU 《Advances in Atmospheric Sciences》 SCIE CAS CSCD 2017年第10期1159-1168,共10页
To commemorate 100 years since the birth of Professor Duzheng YE, this paper reviews the contribution of Ye and his research team to the development from climate to global change science in the past 30 or so years, in... To commemorate 100 years since the birth of Professor Duzheng YE, this paper reviews the contribution of Ye and his research team to the development from climate to global change science in the past 30 or so years, including:(1) the role of climate change in global change;(2) the critical time scales and predictability of global change;(3) the sensitive regions of global change—transitional zones of climate and ecosystems; and(4) orderly human activities and adaptation to global change, with a focus on the development of a proactive strategy for adaptation to such change. 展开更多
关键词 Professor Duzheng YE climate change global change human activity proactive adaptation
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Millennial-scale evolution of Hunshandake Desert and climate change during the Holocene in Inner Mongolia,northern China 被引量:11
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作者 HeLing Jin Liang Ying Sun Zhong Sun 《Research in Cold and Arid Regions》 2010年第6期505-513,共9页
The Hunshandake Desert is located at the northern edge of the East Asian monsoon region,and its natural environment is sensitive to monsoonal changes.Geologic records suggest that desert evolution corresponding to cli... The Hunshandake Desert is located at the northern edge of the East Asian monsoon region,and its natural environment is sensitive to monsoonal changes.Geologic records suggest that desert evolution corresponding to climate change had experienced several cycles in the Holocene,and the evolutionary process can be distinguished by four dominant stages according to changing trends of the environment and climate.(1) Holocene Ameliorative Period(11.0-8.7 cal ka B.P.),when the desert area gradually shrank following an approaching warm-wet climate and strengthening summer monsoon.(2) Holocene Optimum(8.7-6.0 cal ka B.P.),when the majority of moving sand dunes were stabilized and vegetation coverage quickly expanded in a suitable warm-wet climate and a strong summer monsoon.(3) Holocene Multivariate Period(6.0-3.5 cal ka B.P.),during a low-amplitude desert transformed between moving and stabilized types under alternating functions of cold-dry with warm-wet climate,and winter monsoon with summer monsoon.(4) Holocene Decay Period(since 3.5 cal ka B.P.),when the desert area tended to expand along with a weakened summer monsoon and a dry climate. 展开更多
关键词 Hunshandake Desert desert evolution global climate change HOLOCENE
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Characteristics of groundwater in Northeast Qinghai-Tibet Plateau and its response to climate change and human activities:A case study of Delingha,Qaidam Basin 被引量:7
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作者 Wei Zhao Yan-zhu Lin +3 位作者 Peng-peng Zhou Guang-cai Wang Xue-ya Dang Xiao-fan Gu 《China Geology》 2021年第3期377-388,共12页
Delingha is located in the northeast margin of Qaidam Basin.Bayin River alluvial proluvial fan is the main aquifer of Delingha,in which groundwater generally flows from north to south.The hydrochemistry results showed... Delingha is located in the northeast margin of Qaidam Basin.Bayin River alluvial proluvial fan is the main aquifer of Delingha,in which groundwater generally flows from north to south.The hydrochemistry results showed that two different hydrochemical evolution paths formed along southeast and southwest directions,respectively.Cl-Na type groundwater was formed in front of Gahai Lake,and SO_(4)·HCO_(3)-Na·Ca type groundwater was formed in front of Keluke Lake.The results of deuterium(D)and 18O revealed that the groundwater mainly originated from the continuous accumulation of precipitation during geological history under cold and humid climate conditions.In addition,results of ^(14)C indicated that the groundwater age was more than 1140 years,implying relatively poor renewal capability of regional groundwater.Moreover,our numerical modeling results showed that the regional groundwater level will continue to rise under the warm and humid climate conditions. 展开更多
关键词 GROUNDWATER global climate change HYDROCHEMISTRY Groundwater circulation Groundwater age Groundwater level rising Geological survey engineering Qaidam Basin Delingha Qinghai-Tibet Plateau
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Alectra vogelii: A Threat to Bambara Groundnut Production under Climate Change: A Review Paper
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作者 Rudo Musango Josephine T. Pasipanodya +2 位作者 Tana Tamado Stanford Mabasa William Makaza 《Journal of Agricultural Chemistry and Environment》 2022年第2期83-105,共23页
Bambara groundnut (BGN) is a protein-rich pulse with the ability to lead to more climate-resilient agriculture. The objective of this study was to review Alectra vogelii as a potential threat to BGN production as a re... Bambara groundnut (BGN) is a protein-rich pulse with the ability to lead to more climate-resilient agriculture. The objective of this study was to review Alectra vogelii as a potential threat to BGN production as a result of climate change. However, the crop faces biotic and abiotic stresses. Alectra vogelii is a major biotic constraint to BGN production, especially in Africa’s non-fertile semi-arid regions. Alectra vogelii (L.) Benth is a parasitic weed in the Orobanchaceae family that causes major damage by forming haustoria attached to roots to enable absorption of nutrients from the BGN. Alectra vogelii produces a large number of minute seeds that can live in the soil for up to 20 years. Based on the reviewed literature, various control mechanisms for dealing with the harmful effects of Alectra vogelii have been proposed. The aim of this research was to reveal the effect of Alectra vogelii on BGN and possible control strategies. We discuss the different control methods such as cultural and mechanical management procedures, phosphorus fertilizers and resistant host crops, herbicide use, and integrated Alectra vogelii control methods. In adaptive methods, however, new techniques remain important. The life cycle of root parasitic weeds is inextricably linked to that of their host, making it an ideal target for such new control techniques, especially when aimed at the early stages of the host-parasite relationship. This review reveals additional information on the function of parasitic seed, strigolactones and how they can be used in breeding to management parasitic weeds. 展开更多
关键词 global climate change Alectra vogelii STRIGOLACTONES Parasitic Weed Bambara Groundnut Host Plant Resistance Control Strategies
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Elevation response of above-ground net primary productivity for Picea crassifolia to climate change in Qilian Mountains of Northwest China based on tree rings 被引量:1
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作者 WU Xuan JIAO Liang +3 位作者 DU Dashi XUE Ruhong WEI Mengyuan ZHANG Peng 《Journal of Geographical Sciences》 SCIE CSCD 2024年第1期146-164,共19页
Current ecosystem models used to simulate global terrestrial carbon balance generally suggest that terrestrial landscapes are stable and mature,but terrestrial net primary productivity(NPP)data estimated without accou... Current ecosystem models used to simulate global terrestrial carbon balance generally suggest that terrestrial landscapes are stable and mature,but terrestrial net primary productivity(NPP)data estimated without accounting for disturbances in species composition,environment,structure,and ecological characteristics will reduce the accuracy of the global carbon budget.Therefore,the steady-state assumption and neglect of elevation-related changes in forest NPP is a concern.The Qilian Mountains are located in continental climate zone,and vegetation is highly sensitive to climate change.We quantified aboveground biomass(AGB)and aboveground net primary productivity(ANPP)sequences at three elevations using field-collected tree rings of Picea crassifolia in Qilian Mountains of Northwest China.The results showed that(1)There were significant differences between AGB and ANPP at the three elevations,and the growth rate of AGB was the highest at the low elevation(55.99 t ha^(–1)10a^(–1)).(2)There are differences in the response relationship between the ANPP and climate factors at the three elevations,and drought stress is the main climate signal affecting the change of ANPP.(3)Under the future climate scenario,drought stress intensifies,and the predicted decline trend of ANPP at the three elevations from mid-century to the end of this century is–0.025 t ha^(–1)10a^(–1),respectively;–0.022 t ha^(–1)10a^(–1);At–0.246 t ha^(–1)10a^(–1),the level of forest productivity was significantly degraded.The results reveal the elevation gradient differences in forest productivity levels and provide key information for studying the carbon sink potential of boreal forests. 展开更多
关键词 global climate change tree ring aboveground net primary productivity aboveground biomass drought stress Qilian Mountains
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