The concept of carbon neutrality is much emphasized in IPCC Spatial Report on Global Warming of 1.5C in order to achieve the long-termtemperature goals as reflected in Paris Agreement.To keep these goals within reach,...The concept of carbon neutrality is much emphasized in IPCC Spatial Report on Global Warming of 1.5C in order to achieve the long-termtemperature goals as reflected in Paris Agreement.To keep these goals within reach,peaking the global carbon emissions as soon as possible andachieving carbon neutrality are urgently needed.However,global CO_(2)emissions continued to grow up to a record high of 43.1 Gt CO_(2)during2019,with fossil CO_(2)emissions of 36.5 Gt CO_(2)and land-use change emissions of 6.6 Gt CO_(2).In such case,the global carbon emissions mustdrop 32 Gt CO_(2)(7.6%per year)from 2020 to 2030 for the 1.5C warming limit,which is even larger than the COVID-induced reduction(6.4%)in global CO_(2)emissions during 2020.Recently,China has announced scaling up its national commitments,aiming to peak its CO_(2)emissionsbefore 2030 and achieve carbon neutrality before 2060.Achieving these goals requires rapid and far-reaching transitions in the whole society.Onthe one hand,deeper emissions reduction in all sectors includes decarbonization of energy,electrification,increasing share of renewables,energyefficiency,sustainable land management,decarbonization of transport,reducing food loss and waste,as well as behavior and lifestyles changes.On the other hand,possible actions by removing CO_(2)from the atmosphere involves enlarging land and ocean net carbon sink,CO_(2)removaltechnologies(such as Bioenergy with carbon capture and storage),and CO_(2)capture,utilization and storage technologies,but should be cautionfor their scales and tradeoffs.展开更多
Understanding climate change as well as its impacts on vegetation growth over the Tibetan Plateau has important implication for ecosystems.This study investigated changes in drought conditions and their impacts on veg...Understanding climate change as well as its impacts on vegetation growth over the Tibetan Plateau has important implication for ecosystems.This study investigated changes in drought conditions and their impacts on vegetation growth over the Tibetan Plateau.The results reveal that the precipitation in growing season(May-September)shows a significant increase over most parts of the central and eastern Tibetan Plateau during 1961—2019.Consequently,drought conditions have generally relieved except in the south and northeast where precipitation has decreased.Combining analyses of gridded-dataset-derived drought indices with vegetation indices during 1982—2015,vegetation improvement in most regions of the Plateau is mainly due to lessened drought conditions.Noticeably,vegetation degradation is also found in part of southern Tibetan Plateau mainly resulting from drought enhancement.This study is expected to provide scientific basis for understanding of change in drought condition and its impacts on vegetation over different regions of TP under global warming background.展开更多
基金the Basic Research to Operation Funds of the Chinese Academy of Meteorological Sciences(2020Y004)National Key Research and Development Program of China(2018YFC1507700).
文摘The concept of carbon neutrality is much emphasized in IPCC Spatial Report on Global Warming of 1.5C in order to achieve the long-termtemperature goals as reflected in Paris Agreement.To keep these goals within reach,peaking the global carbon emissions as soon as possible andachieving carbon neutrality are urgently needed.However,global CO_(2)emissions continued to grow up to a record high of 43.1 Gt CO_(2)during2019,with fossil CO_(2)emissions of 36.5 Gt CO_(2)and land-use change emissions of 6.6 Gt CO_(2).In such case,the global carbon emissions mustdrop 32 Gt CO_(2)(7.6%per year)from 2020 to 2030 for the 1.5C warming limit,which is even larger than the COVID-induced reduction(6.4%)in global CO_(2)emissions during 2020.Recently,China has announced scaling up its national commitments,aiming to peak its CO_(2)emissionsbefore 2030 and achieve carbon neutrality before 2060.Achieving these goals requires rapid and far-reaching transitions in the whole society.Onthe one hand,deeper emissions reduction in all sectors includes decarbonization of energy,electrification,increasing share of renewables,energyefficiency,sustainable land management,decarbonization of transport,reducing food loss and waste,as well as behavior and lifestyles changes.On the other hand,possible actions by removing CO_(2)from the atmosphere involves enlarging land and ocean net carbon sink,CO_(2)removaltechnologies(such as Bioenergy with carbon capture and storage),and CO_(2)capture,utilization and storage technologies,but should be cautionfor their scales and tradeoffs.
基金supported by the second Tibetan Plateau Scientific Expedition and Research Program(STEP,2019QZKK1001)the Basic Research to Operation Funds of the Chinese Academy of Meteorological Sciences(2020Y004).
文摘Understanding climate change as well as its impacts on vegetation growth over the Tibetan Plateau has important implication for ecosystems.This study investigated changes in drought conditions and their impacts on vegetation growth over the Tibetan Plateau.The results reveal that the precipitation in growing season(May-September)shows a significant increase over most parts of the central and eastern Tibetan Plateau during 1961—2019.Consequently,drought conditions have generally relieved except in the south and northeast where precipitation has decreased.Combining analyses of gridded-dataset-derived drought indices with vegetation indices during 1982—2015,vegetation improvement in most regions of the Plateau is mainly due to lessened drought conditions.Noticeably,vegetation degradation is also found in part of southern Tibetan Plateau mainly resulting from drought enhancement.This study is expected to provide scientific basis for understanding of change in drought condition and its impacts on vegetation over different regions of TP under global warming background.
