In this study,we found that the intensity of interannual variability in the summer upper-tropospheric zonal wind has significantly weakened over Northeast Asia and the subtropical western North Pacific（WNP） since th...In this study,we found that the intensity of interannual variability in the summer upper-tropospheric zonal wind has significantly weakened over Northeast Asia and the subtropical western North Pacific（WNP） since the mid-1990s,concurrent with the previously documented decrease of the westerly jet over North China and Northwest China.Corresponding to this weakening of zonal wind variability,the meridional displacement of the East Asian westerly jet（EAJ） manifested as the leading mode of zonal wind variability over the WNP and East Asia（WNP-EA） before the mid-1990s but not afterward.The energetics of the anomalous pattern associated with the meridional displacement of the EAJ suggests that barotropic energy conversion,from basic flow to anomalous patterns,has led to the weakening of the variability in the EAJ meridional displacement and to a change in the leading dominant mode since the mid-1990s.The barotropic energy conversion efficiently maintained the anomalies associated with the variability in the EAJ meridional displacement during 1979-1993 but acted to dampen the anomalies during 1994-2008.A further investigation of the energetics suggests that the difference in the patterns of the circulation anomaly associated with either the first leading mode or the meridional displacement of the EAJ,i.e.,a southwest-northeast tilted pattern during 1979-1993 and a zonally oriented pattern during 1994-2008,has contributed greatly to the change in barotropic energy conversion.展开更多
This study identifies a decadal shift of summer surface air temperature （SAT） over Northeast Asia,including southeastern parts of Russia,Mongolia and northern China,around the mid-1990s.The results suggest that the ...This study identifies a decadal shift of summer surface air temperature （SAT） over Northeast Asia,including southeastern parts of Russia,Mongolia and northern China,around the mid-1990s.The results suggest that the SAT over the Northeast Asia experienced a significant warming after 1994 relative to that before 1993.This decadal shift also extends to northern China,and leads to a warmer summer over Northeast China and North China after the mid-1990s.The decadal warming over Northeast Asia is found to concur with the enhancement of South China rainfall around the mid-1990s.On the one hand,both the Northeast Asian SAT and South China rainfall exhibit this mid-1990s decadal shift only in summer,but not in other seasons.On the other hand,both the Northeast Asian SAT and South China rainfall exhibit this mid-1990s decadal shift not only in the summer seasonal mean,but also in each month of summer （June,July and August）.Furthermore,the decadal warming is found to result from an anticyclonic anomaly over Northeast Asia,which can be interpreted as the response to the increased precipitation over South China,according to previous numerical results.Thus,we conclude that the warming shift of summer Northeast Asian SAT around the mid-1990s was a remote response to the increased precipitation over South China.展开更多
This study investigated the drivers and physical processes for the abrupt decadal summer surface warming and increases in hot temperature extremes that occurred over Northeast Asia in the mid-1990s. Observations indic...This study investigated the drivers and physical processes for the abrupt decadal summer surface warming and increases in hot temperature extremes that occurred over Northeast Asia in the mid-1990s. Observations indicate an abrupt increase in summer mean surface air temperature （SAT） over Northeast Asia since the mid-1990s. Accompanying this abrupt surface wanning, significant changes in some temperature extremes, characterized by increases in summer mean daily maximum temperature （Tmax）, daily minimum temperature （Train）, annual hottest day temperature （TXx）, and annual warmest night temperature （TNx） were observed. There were also increases in the frequency of summer days （SU） and tropical nights （TR）. Atmospheric general circulation model experiments forced by changes in sea surface temperature （SST）/sea ice extent （SIE）, anthropogenic greenhouse gas （GHG） concentrations, and anthropogenic aerosol （AA） forcing, relative to the period 1964- 93, reproduced the general patterns of observed summer mean SAT changes and associated changes in temperature extremes, although the abrupt decrease in precipitation since the mid-1990s was not simulated. Additional model experiments with different forcings indicated that changes in SST/SIE explained 76% of the area-averaged summer mean surface warming signal over Northeast Asia, while the direct impact of changes in GHG and AA explained the remaining 24% of the surface warming signal. Analysis of physical processes indicated that the direct impact of the changes in AA （through aerosol- radiation and aerosol-cloud interactions）, mainly related to the reduction of AA precursor emissions over Europe, played a dominant role in the increase in TXx and a similarly important role as SST/SIE changes in the increase in the frequency of SU over Northeast Asia via AA-induced coupled atmosphere-land surface and cloud feedbacks, rather than through a direct impact of AA changes on cloud condensation nuclei. The modelling results also imply that the abrupt summer surface warming and increases in hot temperature extremes over Northeast Asia since the mid-1990s will probably sustain in the next few decades as GHG concentrations continue to increase and AA precursor emissions over both North America and Europe continue to decrease.展开更多
Marriage is a theme influenced by cultural progress. Economic factor is one of the main elements that people of the early nineteenth century considered when deciding a marriage. The pursuit of economic interest result...Marriage is a theme influenced by cultural progress. Economic factor is one of the main elements that people of the early nineteenth century considered when deciding a marriage. The pursuit of economic interest results in the advent of some tragic marriages while now it is a side reason. However, women today have made great advancement in education background, employment situation and social status. Women gradually have their economic ability, autonomy and social status. Hence, they began to lay emphasis on the equality and sense of happiness. This is why the views on marriage vary in different eras. This paper, based on the view of marriage from the nineteenth- century English novel Pride and Pejudice, is dedicated to elucidating the changes and improvements of view on marriage from feminist perspective via comparing and contrasting the similarities and the differences of people's view on marriage between the early 1800 s and modern times, and then draws a conclusion that the women's degree of receptive education can influence their social status and view on marriage. In modern times the view on marriage based on equality attribute to the sense of happiness of a family and the degree of satisfaction of marriage.展开更多
This article seeks to reinterpret Wang Zengqi＇s （汪曾祺, 1920-97） novels written in the early and mid-1980s. Through a historical lens, the author examines the era immediately following China＇s reform and opening-...This article seeks to reinterpret Wang Zengqi＇s （汪曾祺, 1920-97） novels written in the early and mid-1980s. Through a historical lens, the author examines the era immediately following China＇s reform and opening-up when the political ideal of ＂distribution according to work＂ （anlao fenpei） had met with social realities at that time. Departing from the mainstream approach to Wang Zengqi, which oversimplifies China＇s process of reforms and opening and consequently reduces Wang Zengqi＇s literature to a ＂pure literature＂ devoid of social implications, a lyricism of individuals, and a depiction of depoliticized everyday life, this article lays emphasis on the interconnection between Wang Zengqi＇s time and his writings. By analyzing the forms and styles of Wang＇s novels, the author endeavors to place his writings back in their historical context as a means of rediscovering their underlying meanings and politics hitherto neglected by the scholarship on Chinese literature from the 1980s. Therefore, this article refutes the misconception of Wang Zengqi being a ＂small writer＂ and acknowledges the writer＇s ＂bigness＂ in his writing. In fact, big writers like Wang Zengqi are indispensable in the conception of new political worlds under any historical condition.展开更多
基金supported by the National Natural Science Foundation of China (Grant Nos. 40810059005 and 40725016)
文摘In this study,we found that the intensity of interannual variability in the summer upper-tropospheric zonal wind has significantly weakened over Northeast Asia and the subtropical western North Pacific（WNP） since the mid-1990s,concurrent with the previously documented decrease of the westerly jet over North China and Northwest China.Corresponding to this weakening of zonal wind variability,the meridional displacement of the East Asian westerly jet（EAJ） manifested as the leading mode of zonal wind variability over the WNP and East Asia（WNP-EA） before the mid-1990s but not afterward.The energetics of the anomalous pattern associated with the meridional displacement of the EAJ suggests that barotropic energy conversion,from basic flow to anomalous patterns,has led to the weakening of the variability in the EAJ meridional displacement and to a change in the leading dominant mode since the mid-1990s.The barotropic energy conversion efficiently maintained the anomalies associated with the variability in the EAJ meridional displacement during 1979-1993 but acted to dampen the anomalies during 1994-2008.A further investigation of the energetics suggests that the difference in the patterns of the circulation anomaly associated with either the first leading mode or the meridional displacement of the EAJ,i.e.,a southwest-northeast tilted pattern during 1979-1993 and a zonally oriented pattern during 1994-2008,has contributed greatly to the change in barotropic energy conversion.
基金supported by the National Natural Science Foundation of China (Grant No. 41105046)the National Basic Research Program of China (Grant No. 2010CB950403)the Chinese Academy of Sciences (Grant No. XDA05090000)
文摘This study identifies a decadal shift of summer surface air temperature （SAT） over Northeast Asia,including southeastern parts of Russia,Mongolia and northern China,around the mid-1990s.The results suggest that the SAT over the Northeast Asia experienced a significant warming after 1994 relative to that before 1993.This decadal shift also extends to northern China,and leads to a warmer summer over Northeast China and North China after the mid-1990s.The decadal warming over Northeast Asia is found to concur with the enhancement of South China rainfall around the mid-1990s.On the one hand,both the Northeast Asian SAT and South China rainfall exhibit this mid-1990s decadal shift only in summer,but not in other seasons.On the other hand,both the Northeast Asian SAT and South China rainfall exhibit this mid-1990s decadal shift not only in the summer seasonal mean,but also in each month of summer （June,July and August）.Furthermore,the decadal warming is found to result from an anticyclonic anomaly over Northeast Asia,which can be interpreted as the response to the increased precipitation over South China,according to previous numerical results.Thus,we conclude that the warming shift of summer Northeast Asian SAT around the mid-1990s was a remote response to the increased precipitation over South China.
基金supported by the UK– China Research & Innovation Partnership Fund through the Met Office Climate Science for Service Partnership (CSSP) of China, as part of the Newton Fundsupported by the UK National Centre for Atmospheric Science–Climate (NCAS– Climate) at the University of Reading
文摘This study investigated the drivers and physical processes for the abrupt decadal summer surface warming and increases in hot temperature extremes that occurred over Northeast Asia in the mid-1990s. Observations indicate an abrupt increase in summer mean surface air temperature （SAT） over Northeast Asia since the mid-1990s. Accompanying this abrupt surface wanning, significant changes in some temperature extremes, characterized by increases in summer mean daily maximum temperature （Tmax）, daily minimum temperature （Train）, annual hottest day temperature （TXx）, and annual warmest night temperature （TNx） were observed. There were also increases in the frequency of summer days （SU） and tropical nights （TR）. Atmospheric general circulation model experiments forced by changes in sea surface temperature （SST）/sea ice extent （SIE）, anthropogenic greenhouse gas （GHG） concentrations, and anthropogenic aerosol （AA） forcing, relative to the period 1964- 93, reproduced the general patterns of observed summer mean SAT changes and associated changes in temperature extremes, although the abrupt decrease in precipitation since the mid-1990s was not simulated. Additional model experiments with different forcings indicated that changes in SST/SIE explained 76% of the area-averaged summer mean surface warming signal over Northeast Asia, while the direct impact of changes in GHG and AA explained the remaining 24% of the surface warming signal. Analysis of physical processes indicated that the direct impact of the changes in AA （through aerosol- radiation and aerosol-cloud interactions）, mainly related to the reduction of AA precursor emissions over Europe, played a dominant role in the increase in TXx and a similarly important role as SST/SIE changes in the increase in the frequency of SU over Northeast Asia via AA-induced coupled atmosphere-land surface and cloud feedbacks, rather than through a direct impact of AA changes on cloud condensation nuclei. The modelling results also imply that the abrupt summer surface warming and increases in hot temperature extremes over Northeast Asia since the mid-1990s will probably sustain in the next few decades as GHG concentrations continue to increase and AA precursor emissions over both North America and Europe continue to decrease.
文摘Marriage is a theme influenced by cultural progress. Economic factor is one of the main elements that people of the early nineteenth century considered when deciding a marriage. The pursuit of economic interest results in the advent of some tragic marriages while now it is a side reason. However, women today have made great advancement in education background, employment situation and social status. Women gradually have their economic ability, autonomy and social status. Hence, they began to lay emphasis on the equality and sense of happiness. This is why the views on marriage vary in different eras. This paper, based on the view of marriage from the nineteenth- century English novel Pride and Pejudice, is dedicated to elucidating the changes and improvements of view on marriage from feminist perspective via comparing and contrasting the similarities and the differences of people's view on marriage between the early 1800 s and modern times, and then draws a conclusion that the women's degree of receptive education can influence their social status and view on marriage. In modern times the view on marriage based on equality attribute to the sense of happiness of a family and the degree of satisfaction of marriage.
文摘This article seeks to reinterpret Wang Zengqi＇s （汪曾祺, 1920-97） novels written in the early and mid-1980s. Through a historical lens, the author examines the era immediately following China＇s reform and opening-up when the political ideal of ＂distribution according to work＂ （anlao fenpei） had met with social realities at that time. Departing from the mainstream approach to Wang Zengqi, which oversimplifies China＇s process of reforms and opening and consequently reduces Wang Zengqi＇s literature to a ＂pure literature＂ devoid of social implications, a lyricism of individuals, and a depiction of depoliticized everyday life, this article lays emphasis on the interconnection between Wang Zengqi＇s time and his writings. By analyzing the forms and styles of Wang＇s novels, the author endeavors to place his writings back in their historical context as a means of rediscovering their underlying meanings and politics hitherto neglected by the scholarship on Chinese literature from the 1980s. Therefore, this article refutes the misconception of Wang Zengqi being a ＂small writer＂ and acknowledges the writer＇s ＂bigness＂ in his writing. In fact, big writers like Wang Zengqi are indispensable in the conception of new political worlds under any historical condition.
