Since first International Textile Exhibition created by SPINEXPO,it has been dedicated to the display of the Yarns–Fibres–Knitwear, Knitted Fabrics,Innovative Textile
Respiratory infections are associated with high morbidity and mortality and are a major global health problem[1].Acute respiratory infections are caused by multiple respiratory pathogens,including viruses and bacteria...Respiratory infections are associated with high morbidity and mortality and are a major global health problem[1].Acute respiratory infections are caused by multiple respiratory pathogens,including viruses and bacteria.Viral-bacterial co-infections,which have become increasingly common and a global concern,can lead to substantial complications,causing higher morbidity and adverse prognosis[2].Previous studies have reported low positive detection rates of targeted pathogens related to acute respiratory infections,owing to the limited number of detected pathogens and variations in the sensitivity of diagnostic methods[3-4].Low positive detection rates may impede our understanding of respiratory pathogen characteristics and hamper the development of precise treatment and prevention strategies.展开更多
Yiwu merchants ride a winter sports boom as“Made in China”gear heats up the global economy Yiwu,located in east China’s Zhejiang Province,is globally renowned as a hub for small commodities.This winter,its snow and...Yiwu merchants ride a winter sports boom as“Made in China”gear heats up the global economy Yiwu,located in east China’s Zhejiang Province,is globally renowned as a hub for small commodities.This winter,its snow and ice sports products are generating a surge in business.展开更多
The Milan-Cortina Winter Olympics,in Italy,concluded on February 22,after 17 days of competitions that witnessed broad participation and historic breakthroughs.China-which fielded 126 athletes in 91 events across 15 d...The Milan-Cortina Winter Olympics,in Italy,concluded on February 22,after 17 days of competitions that witnessed broad participation and historic breakthroughs.China-which fielded 126 athletes in 91 events across 15 disciplines--sent its largest-ever delegation to an overseas Winter Olympics.展开更多
The main purpose of using geothermal energy piles(GEPs)is to enable the exploitation of geothermal energy for meeting the heating/cooling demands of buildings efficiently.However,the installation process of convention...The main purpose of using geothermal energy piles(GEPs)is to enable the exploitation of geothermal energy for meeting the heating/cooling demands of buildings efficiently.However,the installation process of conventional GEPs is inconvenient compared with that of traditional foundation piles.The pre-bored grouted planted geothermal energy pile(PGP GEP)is an innovative technology to simplify the installation process.Most investigations of in-situ experiments for conventional GEPs have focused on summer conditions.An in-situ test for a PGP GEP was conducted to analyze the temperature changes and thermo-mechanical characteristics under winter conditions.The results show that the average temperature of the pile decreased by 5.1℃,and the pile exhibited a general trend of high temperatures at both ends and low temperatures in the middle.In mechanics,strong pile end restraints resulted in smaller observed axial strain and higher axial thermal-induced force in the pile ends than at the middle of the pile.展开更多
As the wheel of time turns toward the year's end and the beginning of the new year,the snow-kissed land of Xizang gracefully unveils its grandeur and offers a feast of wonders for all to explore.Here,crystalline i...As the wheel of time turns toward the year's end and the beginning of the new year,the snow-kissed land of Xizang gracefully unveils its grandeur and offers a feast of wonders for all to explore.Here,crystalline ice and snow form a celestial winter realm.Amid the biting seasonal winds,o month-long New Year celebration brings one o deep,heartfelt warmth.Rarely witnessed elsewhere in the world,this collection of New Year customs stands as both a cultural marvel and a warm gift that the plateau bestows upon the depths of winter.展开更多
Yiwu merchants ride a winter sports boom as“Made in China”winter gear heats up the global economy.YIWU,located in east China’s Zhejiang Province,is globally renowned as a hub for small commodities.This winter,its s...Yiwu merchants ride a winter sports boom as“Made in China”winter gear heats up the global economy.YIWU,located in east China’s Zhejiang Province,is globally renowned as a hub for small commodities.This winter,its snow and ice sports products are generating a surge in business.Products such as snowboards,ski goggles,and ski poles are drawing an increasing number of merchants worldwide for purchases.展开更多
Through categorizing common autumn and winter garden plants with high ornamental value in Kunming City, plant furnishing patterns to highlight the autumn and winter landscape features of this city are proposed by comb...Through categorizing common autumn and winter garden plants with high ornamental value in Kunming City, plant furnishing patterns to highlight the autumn and winter landscape features of this city are proposed by combining with the application cases, and suggestions are given to improve plant landscape in Kunming City.展开更多
Through field investigation on autumn and winter ornamental landscape plants in representative main roads, residential areas and parks of Kuitun City and based on relevant materials, the disposition and landscaping of...Through field investigation on autumn and winter ornamental landscape plants in representative main roads, residential areas and parks of Kuitun City and based on relevant materials, the disposition and landscaping of these plants were analyzed from the perspectives of plant species, ornamental characteristics and landscape creation. The result showed that autumn and winter landscape plants in Kuitun City were primarily evergreen coniferous and deciduous trees outstanding for their shapes and colors, and that landscape was created through different types of plant disposition. Especially colors of trunks, barks, leaves, winter buds and fruits' colors provided favorable conditions for appreciating plants in autumn and winter. Finally, suggestions were proposed according to the investigation and analysis of autumn and winter ornamental plants in Kuitun City, so as to provide reference for future construction and development of landscape plants.展开更多
[Objective]The study was to monitor the indoor environmental parameters of broiler house with three-overlap cages and analyze the differences in winter and autumn. [Method] In the process of feeding,the same broiler h...[Objective]The study was to monitor the indoor environmental parameters of broiler house with three-overlap cages and analyze the differences in winter and autumn. [Method] In the process of feeding,the same broiler house in the same farm was chosen to determine indoor ambient temperature,humidity and air quality at 3-6 weeks age of broilers in different seasons. The measure points were distributed in four different positions in the house. [Result] There was no significant difference in ambient temperature between autumn and winter( P > 0. 05). The ambient temperature in the house in winter was slightly higher than that in autumn. The humidity in autumn was significantly higher than that in winter( P < 0. 05). The temperature and humidity in two seasons could meet the requirements of broiler growth. There was no significant difference( P > 0. 05) in ammonia concentration between autumn and winter,while ammonia concentration in winter was slightly higher than that in autumn. The carbon dioxide concentration of broiler house in winter was significantly higher than that in autumn( P < 0. 05).The total number of airborne bacteria in winter was significantly higher than that in autumn( P < 0. 05). [Conclusion]The indoor temperature kept constant in autumn and winter seasons in closed poultry house. In winter,the humidity was reduced,the carbon dioxide concentration was increased,and the total number of bacteria in the air was increased. The ventilation in winter should be increased in case of heat preservation.展开更多
Associations between autumn Arctic sea ice concentration（SIC） and early winter precipitation in China are studied using singular value decomposition analysis. The results show that a reduced SIC almost everywhere in...Associations between autumn Arctic sea ice concentration（SIC） and early winter precipitation in China are studied using singular value decomposition analysis. The results show that a reduced SIC almost everywhere in the Arctic Ocean, except the northern Greenland Sea and Canadian Basin, are accompanied by dry conditions over central China, extending northeast from the Tibetan Plateau toward the Japan Sea, the Bohai Sea and the Yellow Sea, and wet conditions over South China and North China. Atmospheric circulation anomalies associated with SIC variability show two wave-train structures, which are persistent from autumn to winter, leading to the identified relationship between autumn Arctic SIC and early winter precipitation in China. Given that the decline in autumn SIC in the Arctic Ocean is expected to continue as the climate warms, this relationship provides a possible long-term outlook for early winter precipitation in China.展开更多
Background:The vulnerable Chinese Egret(Egretta eulophotes)is a long-distance migratory waterbird whose migration and wintering information is poorly understood.This study aims to identify the autumn migration routes ...Background:The vulnerable Chinese Egret(Egretta eulophotes)is a long-distance migratory waterbird whose migration and wintering information is poorly understood.This study aims to identify the autumn migration routes and wintering areas of juvenile Chinese Egrets and determine the migration movement traits of this species.Methods:Thirty-nine juvenile Chinese Egrets from the Fantuozi Island,an uninhabited offshore island with a large breeding colony of Chinese Egrets in Dalian,China,were tracked using GPS/GSM transmitters.Some feathers from each tracked juvenile were collected for molecular identification of sex in the laboratory.The GPS locations,recorded at 2-h intervals from August 2018 to May 2020,were used for the analyses.Results:Of the 39 tracked juveniles,30 individuals began their migration between September and November,and 13 successfully completed their autumn migration between October and November.The juveniles migrated southward via three migration routes,coastal,oceanic and inland,mainly during the night.The migration duration,migration distance,flight speed,and stopover duration of the 13 juvenile egrets that completed migration averaged 5.08±1.04 days,3928.18±414.27 km,57.27±5.73 km/h,and 23.08±19.28 h,respectively.These juveniles wintered in the coastal wetlands of Southeast Asia including those in the Philippines,Vietnam,and Malaysia,and only one successfully began its spring migration in June 2020.Conclusions:This study newly finds that the oceanic route taken by juvenile Chinese Egrets,suggesting that the juveniles are able to fly over the Pacific Ocean without a stopover.Moreover,our novel data indicate that coastal wetlands along the East Asian-Australasian Flyway are important areas for both autumn migration stopover and the wintering of these juveniles,suggesting that international cooperation is important to conserve the vulnerable Chinese Egret and the wetland habitats on which it depends.展开更多
We use historical materials of monthly foggy days from 84 stations of Shandong Province during the latest decades,analyze the spatial distribution features of mean foggy days during autumn and winter and annual mean f...We use historical materials of monthly foggy days from 84 stations of Shandong Province during the latest decades,analyze the spatial distribution features of mean foggy days during autumn and winter and annual mean foggy days in Shandong.Result shows that foggy weather have strong regional characteristics,there are obvious difference between Shandong inland and coast in terms of the frequency of foggy days,winter and autumn are the peak period of dense fog in the inland of Shandong,however,dense fog is less in coastal area.Take Jinan for example,we have emphatically analyzed the activity change rules of foggy days during autumn and winter since 1952 in the inland,as well as the characteristics of atmospheric circulation during the frequently-occurring year and less frequently-occurring year of dense fog.展开更多
Associations between the autumn Arctic sea ice concentration （SIC） and Asian winter temperature are discussed using the singular value decomposition analysis. Results show that in recent 33 years reduced autumn Arct...Associations between the autumn Arctic sea ice concentration （SIC） and Asian winter temperature are discussed using the singular value decomposition analysis. Results show that in recent 33 years reduced autumn Arctic sea ice is accompanied by Asian winter temperature decrease except in the Tibetan plateau and the Arctic Ocean and the North Pacific Ocean coast. The autumn SIC reduction excites two geopotential height centers in Eurasia and the north Arctic Ocean, which are persistent from autumn to winter. The negative center is in Barents Sea/Kara Sea. The positive center is located in Mongolia. The anomalous winds are associated with geopotential height centers, providing favorable clod air for the Asian winter temperature decreasing in recent 33 years. This relationship indicates a potential long-term outlook for the Asian winter temperature decrease as the decline of the autumn sea ice in the Arctic Ocean is expected to continue as climate warms.展开更多
The possible mechanism behind the variability in the dipole pattern of boreal winter precipitation over East Asia is analyzed in this study. The results show that the SST anomalies（SSTAs） over the South Pacific Ocea...The possible mechanism behind the variability in the dipole pattern of boreal winter precipitation over East Asia is analyzed in this study. The results show that the SST anomalies（SSTAs） over the South Pacific Ocean（SPO） in boreal autumn are closely related to the variability in the dipole pattern of boreal winter precipitation over East Asia. The physical link between the boreal autumn SPO SSTAs and the boreal winter East Asian precipitation dipole pattern is shown to mainly be the seasonal persistence of the SPO SSTAs themselves. The seasonal persistence of the SPO SSTAs can memorize and transport the signal of the boreal autumn SSTAs to the following winter, and then stimulates a meridional teleconnection pattern from the SH to the NH, resulting in a meridional dipole pattern of atmospheric circulation over East Asia in boreal winter. As a major influencing factor, this dipole pattern of the atmospheric circulation can finally lead to the anomalous precipitation dipole pattern over East Asia in boreal winter. These observed physical processes are further confirmed in this study through numerical simulation. The evidence from this study, showing the impact of the SPO SSTAs in boreal autumn,not only deepens our understanding of the variability in East Asian boreal winter precipitation, but also provides a potentially useful predictor for precipitation in the region.展开更多
[Objective] The aim was to study the reasons for consecutive severe droughts in autumn and winter. [Method] By dint of precipitation in the observatory station and NCEP/NCAR reanalysis data in observatory station, the...[Objective] The aim was to study the reasons for consecutive severe droughts in autumn and winter. [Method] By dint of precipitation in the observatory station and NCEP/NCAR reanalysis data in observatory station, the circulation background, vertical movement, abnormal temperature and changes of water vapor conditions in Xuzhou from October 2008 to January 2009 were expounded to reveal the causes for consecutive drought in autumn and winter. [Result] Xuzhou was under stable situation for a long time in autumn and winter in 2008, being behind east coastal trough, the downward airstream prevailing; the south trough intensity was weak, and in addition to the east subtropical high and weak intensity, the water vapor transportation condition in Indian Ocean and South Sea was unfavorable. The autumn was warm and the cold air was weak; ever since winter, there were several cold air activities. But the influencing body was in the east, and the south warm and wet airstream was insufficient. Thus, they couldn’t met, which resulted into gale and lower temperature and less precipitation when under the influence of cold air. [Conclusion] The study provided theoretical basis for the prevention of drought in the area.展开更多
We studied effects of sea surface temperature anomaly (SSTA) in the Barents Sea in autumn on the atmospheric circulation in northeast China in winter, using the NCEP reanalysis data and sea surface temperature (SST) d...We studied effects of sea surface temperature anomaly (SSTA) in the Barents Sea in autumn on the atmospheric circulation in northeast China in winter, using the NCEP reanalysis data and sea surface temperature (SST) data of the Hadley Center. The results show that the ocean thermal conditions in the Barents Sea in autumn can be used as an important reference factor for predicting the cold air activity in China. When the sea surface temperature anomaly of the Barents Sea elevated in the autumn, the sea-level pressure anomaly elevated in eastern China on December, northeast China and southeastern Russia on January and February. In the years when the SSTA of the Barents Sea elevated in the autumn, the abnormal high-pressure ridge developed over Europe, and the geopotential height in western China appeared negative anomaly at 500 hPa. At 1000 hPa, the Mongolia high-pressure increased and the northerly airflow strengthened the cold high-latitude air broke out to the south, which was easy to affect northeast and north of China. In negative SSTA years, the high-pressure ridge was west to the north Atlantic, and the geopotential height in central and northern Siberia appeared negative anomaly at 500 hPa;the Mongolia high-pressure was weakened at 1000 hPa.展开更多
1. Background With the next century approaching, people are in a variable state of mind. They hope to break away from or surpass the old and indulge in a fantasy about the new. So, the turn of this century is a compli...1. Background With the next century approaching, people are in a variable state of mind. They hope to break away from or surpass the old and indulge in a fantasy about the new. So, the turn of this century is a complicated, and changeable one.展开更多
The China Garment Research and DesignCentre(Group) announces the followingtrends for Chinese garments in Autumnand Winter 1996: While continuing to remember the oldtimes and feminine styles and features,theeffect of s...The China Garment Research and DesignCentre(Group) announces the followingtrends for Chinese garments in Autumnand Winter 1996: While continuing to remember the oldtimes and feminine styles and features,theeffect of scientific fantasies is prominent.The colour and fabrics are bright,usingvarious fibres,to produce a kind of poundingat modern feelings.On the neutral展开更多
文摘Since first International Textile Exhibition created by SPINEXPO,it has been dedicated to the display of the Yarns–Fibres–Knitwear, Knitted Fabrics,Innovative Textile
基金supported by the Beijing Science and Technology Planning Project of the Beijing Science and Technology Commission(Z241100009024047)the High-Level Public Health Technical Talent Training Plan(lingjunrencai-01-02).
文摘Respiratory infections are associated with high morbidity and mortality and are a major global health problem[1].Acute respiratory infections are caused by multiple respiratory pathogens,including viruses and bacteria.Viral-bacterial co-infections,which have become increasingly common and a global concern,can lead to substantial complications,causing higher morbidity and adverse prognosis[2].Previous studies have reported low positive detection rates of targeted pathogens related to acute respiratory infections,owing to the limited number of detected pathogens and variations in the sensitivity of diagnostic methods[3-4].Low positive detection rates may impede our understanding of respiratory pathogen characteristics and hamper the development of precise treatment and prevention strategies.
文摘Yiwu merchants ride a winter sports boom as“Made in China”gear heats up the global economy Yiwu,located in east China’s Zhejiang Province,is globally renowned as a hub for small commodities.This winter,its snow and ice sports products are generating a surge in business.
文摘The Milan-Cortina Winter Olympics,in Italy,concluded on February 22,after 17 days of competitions that witnessed broad participation and historic breakthroughs.China-which fielded 126 athletes in 91 events across 15 disciplines--sent its largest-ever delegation to an overseas Winter Olympics.
文摘The main purpose of using geothermal energy piles(GEPs)is to enable the exploitation of geothermal energy for meeting the heating/cooling demands of buildings efficiently.However,the installation process of conventional GEPs is inconvenient compared with that of traditional foundation piles.The pre-bored grouted planted geothermal energy pile(PGP GEP)is an innovative technology to simplify the installation process.Most investigations of in-situ experiments for conventional GEPs have focused on summer conditions.An in-situ test for a PGP GEP was conducted to analyze the temperature changes and thermo-mechanical characteristics under winter conditions.The results show that the average temperature of the pile decreased by 5.1℃,and the pile exhibited a general trend of high temperatures at both ends and low temperatures in the middle.In mechanics,strong pile end restraints resulted in smaller observed axial strain and higher axial thermal-induced force in the pile ends than at the middle of the pile.
文摘As the wheel of time turns toward the year's end and the beginning of the new year,the snow-kissed land of Xizang gracefully unveils its grandeur and offers a feast of wonders for all to explore.Here,crystalline ice and snow form a celestial winter realm.Amid the biting seasonal winds,o month-long New Year celebration brings one o deep,heartfelt warmth.Rarely witnessed elsewhere in the world,this collection of New Year customs stands as both a cultural marvel and a warm gift that the plateau bestows upon the depths of winter.
文摘Yiwu merchants ride a winter sports boom as“Made in China”winter gear heats up the global economy.YIWU,located in east China’s Zhejiang Province,is globally renowned as a hub for small commodities.This winter,its snow and ice sports products are generating a surge in business.Products such as snowboards,ski goggles,and ski poles are drawing an increasing number of merchants worldwide for purchases.
文摘Through categorizing common autumn and winter garden plants with high ornamental value in Kunming City, plant furnishing patterns to highlight the autumn and winter landscape features of this city are proposed by combining with the application cases, and suggestions are given to improve plant landscape in Kunming City.
文摘Through field investigation on autumn and winter ornamental landscape plants in representative main roads, residential areas and parks of Kuitun City and based on relevant materials, the disposition and landscaping of these plants were analyzed from the perspectives of plant species, ornamental characteristics and landscape creation. The result showed that autumn and winter landscape plants in Kuitun City were primarily evergreen coniferous and deciduous trees outstanding for their shapes and colors, and that landscape was created through different types of plant disposition. Especially colors of trunks, barks, leaves, winter buds and fruits' colors provided favorable conditions for appreciating plants in autumn and winter. Finally, suggestions were proposed according to the investigation and analysis of autumn and winter ornamental plants in Kuitun City, so as to provide reference for future construction and development of landscape plants.
基金Supported by Science and Technology Project of Shanxi Province(20140311021-2)Key Research Project of Shanxi Academy of Agricultural Sciences(YGG1609)Special Fund of China Agricultural Industry Research System(CARS-42)
文摘[Objective]The study was to monitor the indoor environmental parameters of broiler house with three-overlap cages and analyze the differences in winter and autumn. [Method] In the process of feeding,the same broiler house in the same farm was chosen to determine indoor ambient temperature,humidity and air quality at 3-6 weeks age of broilers in different seasons. The measure points were distributed in four different positions in the house. [Result] There was no significant difference in ambient temperature between autumn and winter( P > 0. 05). The ambient temperature in the house in winter was slightly higher than that in autumn. The humidity in autumn was significantly higher than that in winter( P < 0. 05). The temperature and humidity in two seasons could meet the requirements of broiler growth. There was no significant difference( P > 0. 05) in ammonia concentration between autumn and winter,while ammonia concentration in winter was slightly higher than that in autumn. The carbon dioxide concentration of broiler house in winter was significantly higher than that in autumn( P < 0. 05).The total number of airborne bacteria in winter was significantly higher than that in autumn( P < 0. 05). [Conclusion]The indoor temperature kept constant in autumn and winter seasons in closed poultry house. In winter,the humidity was reduced,the carbon dioxide concentration was increased,and the total number of bacteria in the air was increased. The ventilation in winter should be increased in case of heat preservation.
基金The Chinese Polar Environment Comprehensive Investigation and Assessment Programmes,State Oceanic Administration under contact Nos CHINARE2014-03-01 and CHINARE2014-04-03the Public Science and Technology Research Funds Projects of Ocean under contact No.201205007the Basic Research Operating Funds of the First Institute of Oceanography,State Oceanic Administration under contact Nos 2014T02 and 2014G02
文摘Associations between autumn Arctic sea ice concentration（SIC） and early winter precipitation in China are studied using singular value decomposition analysis. The results show that a reduced SIC almost everywhere in the Arctic Ocean, except the northern Greenland Sea and Canadian Basin, are accompanied by dry conditions over central China, extending northeast from the Tibetan Plateau toward the Japan Sea, the Bohai Sea and the Yellow Sea, and wet conditions over South China and North China. Atmospheric circulation anomalies associated with SIC variability show two wave-train structures, which are persistent from autumn to winter, leading to the identified relationship between autumn Arctic SIC and early winter precipitation in China. Given that the decline in autumn SIC in the Arctic Ocean is expected to continue as the climate warms, this relationship provides a possible long-term outlook for early winter precipitation in China.
基金supported by the National Natural Science Foundation of China(Grant Nos.42076107,41676123,and 41476113)。
文摘Background:The vulnerable Chinese Egret(Egretta eulophotes)is a long-distance migratory waterbird whose migration and wintering information is poorly understood.This study aims to identify the autumn migration routes and wintering areas of juvenile Chinese Egrets and determine the migration movement traits of this species.Methods:Thirty-nine juvenile Chinese Egrets from the Fantuozi Island,an uninhabited offshore island with a large breeding colony of Chinese Egrets in Dalian,China,were tracked using GPS/GSM transmitters.Some feathers from each tracked juvenile were collected for molecular identification of sex in the laboratory.The GPS locations,recorded at 2-h intervals from August 2018 to May 2020,were used for the analyses.Results:Of the 39 tracked juveniles,30 individuals began their migration between September and November,and 13 successfully completed their autumn migration between October and November.The juveniles migrated southward via three migration routes,coastal,oceanic and inland,mainly during the night.The migration duration,migration distance,flight speed,and stopover duration of the 13 juvenile egrets that completed migration averaged 5.08±1.04 days,3928.18±414.27 km,57.27±5.73 km/h,and 23.08±19.28 h,respectively.These juveniles wintered in the coastal wetlands of Southeast Asia including those in the Philippines,Vietnam,and Malaysia,and only one successfully began its spring migration in June 2020.Conclusions:This study newly finds that the oceanic route taken by juvenile Chinese Egrets,suggesting that the juveniles are able to fly over the Pacific Ocean without a stopover.Moreover,our novel data indicate that coastal wetlands along the East Asian-Australasian Flyway are important areas for both autumn migration stopover and the wintering of these juveniles,suggesting that international cooperation is important to conserve the vulnerable Chinese Egret and the wetland habitats on which it depends.
文摘We use historical materials of monthly foggy days from 84 stations of Shandong Province during the latest decades,analyze the spatial distribution features of mean foggy days during autumn and winter and annual mean foggy days in Shandong.Result shows that foggy weather have strong regional characteristics,there are obvious difference between Shandong inland and coast in terms of the frequency of foggy days,winter and autumn are the peak period of dense fog in the inland of Shandong,however,dense fog is less in coastal area.Take Jinan for example,we have emphatically analyzed the activity change rules of foggy days during autumn and winter since 1952 in the inland,as well as the characteristics of atmospheric circulation during the frequently-occurring year and less frequently-occurring year of dense fog.
基金The Basic Research Operating Funds of First Institute of Oceanography,State Oceanic Administration under contract No.2014T02 and 2014G02the Chinese Polar Environment Comprehensive Investigation and Assessment Programmes,State Oceanic Administration under contract Nos CHINARE2015-03-01 and CHINARE2015-04-03the Public science and Technology Research Funds Projects of Ocean under contract No.201205007
文摘Associations between the autumn Arctic sea ice concentration （SIC） and Asian winter temperature are discussed using the singular value decomposition analysis. Results show that in recent 33 years reduced autumn Arctic sea ice is accompanied by Asian winter temperature decrease except in the Tibetan plateau and the Arctic Ocean and the North Pacific Ocean coast. The autumn SIC reduction excites two geopotential height centers in Eurasia and the north Arctic Ocean, which are persistent from autumn to winter. The negative center is in Barents Sea/Kara Sea. The positive center is located in Mongolia. The anomalous winds are associated with geopotential height centers, providing favorable clod air for the Asian winter temperature decreasing in recent 33 years. This relationship indicates a potential long-term outlook for the Asian winter temperature decrease as the decline of the autumn sea ice in the Arctic Ocean is expected to continue as climate warms.
基金jointly supported by the Special Fund for Public Welfare Industry (meteorology) (Grant No. GYHY201306026)the National Natural Science Foundation of China (Grant Nos. 41421004 and 41522503)
文摘The possible mechanism behind the variability in the dipole pattern of boreal winter precipitation over East Asia is analyzed in this study. The results show that the SST anomalies（SSTAs） over the South Pacific Ocean（SPO） in boreal autumn are closely related to the variability in the dipole pattern of boreal winter precipitation over East Asia. The physical link between the boreal autumn SPO SSTAs and the boreal winter East Asian precipitation dipole pattern is shown to mainly be the seasonal persistence of the SPO SSTAs themselves. The seasonal persistence of the SPO SSTAs can memorize and transport the signal of the boreal autumn SSTAs to the following winter, and then stimulates a meridional teleconnection pattern from the SH to the NH, resulting in a meridional dipole pattern of atmospheric circulation over East Asia in boreal winter. As a major influencing factor, this dipole pattern of the atmospheric circulation can finally lead to the anomalous precipitation dipole pattern over East Asia in boreal winter. These observed physical processes are further confirmed in this study through numerical simulation. The evidence from this study, showing the impact of the SPO SSTAs in boreal autumn,not only deepens our understanding of the variability in East Asian boreal winter precipitation, but also provides a potentially useful predictor for precipitation in the region.
基金Supported by Xuzhou Scientific Program (XM09B023)
文摘[Objective] The aim was to study the reasons for consecutive severe droughts in autumn and winter. [Method] By dint of precipitation in the observatory station and NCEP/NCAR reanalysis data in observatory station, the circulation background, vertical movement, abnormal temperature and changes of water vapor conditions in Xuzhou from October 2008 to January 2009 were expounded to reveal the causes for consecutive drought in autumn and winter. [Result] Xuzhou was under stable situation for a long time in autumn and winter in 2008, being behind east coastal trough, the downward airstream prevailing; the south trough intensity was weak, and in addition to the east subtropical high and weak intensity, the water vapor transportation condition in Indian Ocean and South Sea was unfavorable. The autumn was warm and the cold air was weak; ever since winter, there were several cold air activities. But the influencing body was in the east, and the south warm and wet airstream was insufficient. Thus, they couldn’t met, which resulted into gale and lower temperature and less precipitation when under the influence of cold air. [Conclusion] The study provided theoretical basis for the prevention of drought in the area.
文摘We studied effects of sea surface temperature anomaly (SSTA) in the Barents Sea in autumn on the atmospheric circulation in northeast China in winter, using the NCEP reanalysis data and sea surface temperature (SST) data of the Hadley Center. The results show that the ocean thermal conditions in the Barents Sea in autumn can be used as an important reference factor for predicting the cold air activity in China. When the sea surface temperature anomaly of the Barents Sea elevated in the autumn, the sea-level pressure anomaly elevated in eastern China on December, northeast China and southeastern Russia on January and February. In the years when the SSTA of the Barents Sea elevated in the autumn, the abnormal high-pressure ridge developed over Europe, and the geopotential height in western China appeared negative anomaly at 500 hPa. At 1000 hPa, the Mongolia high-pressure increased and the northerly airflow strengthened the cold high-latitude air broke out to the south, which was easy to affect northeast and north of China. In negative SSTA years, the high-pressure ridge was west to the north Atlantic, and the geopotential height in central and northern Siberia appeared negative anomaly at 500 hPa;the Mongolia high-pressure was weakened at 1000 hPa.
文摘1. Background With the next century approaching, people are in a variable state of mind. They hope to break away from or surpass the old and indulge in a fantasy about the new. So, the turn of this century is a complicated, and changeable one.
文摘The China Garment Research and DesignCentre(Group) announces the followingtrends for Chinese garments in Autumnand Winter 1996: While continuing to remember the oldtimes and feminine styles and features,theeffect of scientific fantasies is prominent.The colour and fabrics are bright,usingvarious fibres,to produce a kind of poundingat modern feelings.On the neutral
