Russian President Boris Yeltsin, after an emphatic election victory, made a plea on July 4 for national reconciliation. With over 99 per cent of the vote counted, Yeltsin had 53. 70 per cent to Zyuganov’s 40.41 per c...Russian President Boris Yeltsin, after an emphatic election victory, made a plea on July 4 for national reconciliation. With over 99 per cent of the vote counted, Yeltsin had 53. 70 per cent to Zyuganov’s 40.41 per cent. The 65-year-old persident’s victory will return him to展开更多
France and Iran broke their diplomatic relations on July 17. The United Nations Security Council passed a resolution on July 20 calling for a ceasefire in the Iran-Iraq War.
Illustration All the data in this catalog are chosen from the ＂Preliminary Seismological Report of Chinese Seismic Stations＂ （Its abbreviation is ＂Monthly Report＂）. The catalog includes the events of M≥4.7 in a...Illustration All the data in this catalog are chosen from the ＂Preliminary Seismological Report of Chinese Seismic Stations＂ （Its abbreviation is ＂Monthly Report＂）. The catalog includes the events of M≥4.7 in and near China and M≥6 all over the world. The ＂Monthly Report＂ is monthly compiled by the Ninth Section of Institute of Geophysics, China Earthquake Administration.展开更多
基于江淮流域近53年(1961—2013年)逐日降水观测资料和NCEP/NCAR再分析资料,利用百分位法定义了江淮流域6—7月极端强降水阈值,通过经验正交分解(EOF)方法将极端强降水事件分为沿淮型、沿江型和江南型三种类型。选取各类型极端强降水事...基于江淮流域近53年(1961—2013年)逐日降水观测资料和NCEP/NCAR再分析资料,利用百分位法定义了江淮流域6—7月极端强降水阈值,通过经验正交分解(EOF)方法将极端强降水事件分为沿淮型、沿江型和江南型三种类型。选取各类型极端强降水事件的典型个例,对环流形势进行诊断分析,结果表明:三种典型极端强降水事件发生时,850 h Pa上均存在由华南西部向长江中下游的低空西南急流,沿淮型急流强度最强、急流轴位置最北,沿江型次之,江南型最弱、急流轴位置最南;500 h Pa西太平洋副热带高压脊线和西伸脊点异常主要通过改变急流轴位置,来影响极端强降水的落区;200 h Pa上高空西风急流均表现出强度偏强,急流带偏窄,高空急流入口的右侧与对流层低层西南急流北侧相重合。在高低空急流的共同作用下,极端强降水发生区域上方垂直速度异常偏强,比湿异常偏大,梅雨锋位置的差异决定了极端强降水的发生区域;无论是沿淮型、沿江型还是江南型极端强降水事件发生时水汽主要来自孟加拉湾到中国南海附近海域。展开更多
The temperature change trends in January and July are analyzed and the results show that the trends descend in July but ascend in January except in South China and Southwest China. The relation between the temperature...The temperature change trends in January and July are analyzed and the results show that the trends descend in July but ascend in January except in South China and Southwest China. The relation between the temperature in January and July are discussed by using the wavelet. The results show that the trend phase in July and January are nearly in-phase in Southwest and South China, but are out-of-phase in other regions. Reconstruction of original temperature series in each of the regions indicates that their change trends are consistent with the original temperature series.展开更多
By using China National Climate Center’s 74 circulation characteristics, DERF2.0, BCC-CSM models and Wenzhou Typhoon Network data, and using linear regression, correlation coefficients and other research methods, the...By using China National Climate Center’s 74 circulation characteristics, DERF2.0, BCC-CSM models and Wenzhou Typhoon Network data, and using linear regression, correlation coefficients and other research methods, the variations about typhoon frequency in July from 1951 to 2020 and the large-scale circulation system in July 2020 are analyzed. The results show that 1) in the recent 70 years, the frequency of typhoon generation has slowly decreased, while the frequency of landing typhoons in China has slowly increased;2) typhoon frequency has varying degrees of negative correlation with the intensity of subtropical high in different regions of the northern hemisphere, especially with the area index and intensity index of the South China Sea subtropical high;3) in July 2020, the area and intensity of the subtropical high in the Northwest Pacific were abnormally large and strong. Easterly winds prevailed in the tropics, and the cross-equatorial airflow was weak, resulting in a severe reduction in the frequency of typhoon generation, leading to “no-typhoon” events.展开更多
As a famous English contemporary women writer, Doris Lessing always puts her attention on the female characters that live in South Africa. Their lives are pathetic and sad. This thesis tries to analyze one of Lessing&...As a famous English contemporary women writer, Doris Lessing always puts her attention on the female characters that live in South Africa. Their lives are pathetic and sad. This thesis tries to analyze one of Lessing's short stories— Winter in July from Lacan's three Orders approach. Lessing is a feminist, but the deeper description of the desire and struggle in men's inner world in her works is also remarkable.展开更多
文摘Russian President Boris Yeltsin, after an emphatic election victory, made a plea on July 4 for national reconciliation. With over 99 per cent of the vote counted, Yeltsin had 53. 70 per cent to Zyuganov’s 40.41 per cent. The 65-year-old persident’s victory will return him to
文摘France and Iran broke their diplomatic relations on July 17. The United Nations Security Council passed a resolution on July 20 calling for a ceasefire in the Iran-Iraq War.
文摘Illustration All the data in this catalog are chosen from the ＂Preliminary Seismological Report of Chinese Seismic Stations＂ （Its abbreviation is ＂Monthly Report＂）. The catalog includes the events of M≥4.7 in and near China and M≥6 all over the world. The ＂Monthly Report＂ is monthly compiled by the Ninth Section of Institute of Geophysics, China Earthquake Administration.
文摘基于江淮流域近53年(1961—2013年)逐日降水观测资料和NCEP/NCAR再分析资料,利用百分位法定义了江淮流域6—7月极端强降水阈值,通过经验正交分解(EOF)方法将极端强降水事件分为沿淮型、沿江型和江南型三种类型。选取各类型极端强降水事件的典型个例,对环流形势进行诊断分析,结果表明:三种典型极端强降水事件发生时,850 h Pa上均存在由华南西部向长江中下游的低空西南急流,沿淮型急流强度最强、急流轴位置最北,沿江型次之,江南型最弱、急流轴位置最南;500 h Pa西太平洋副热带高压脊线和西伸脊点异常主要通过改变急流轴位置,来影响极端强降水的落区;200 h Pa上高空西风急流均表现出强度偏强,急流带偏窄,高空急流入口的右侧与对流层低层西南急流北侧相重合。在高低空急流的共同作用下,极端强降水发生区域上方垂直速度异常偏强,比湿异常偏大,梅雨锋位置的差异决定了极端强降水的发生区域;无论是沿淮型、沿江型还是江南型极端强降水事件发生时水汽主要来自孟加拉湾到中国南海附近海域。
文摘The temperature change trends in January and July are analyzed and the results show that the trends descend in July but ascend in January except in South China and Southwest China. The relation between the temperature in January and July are discussed by using the wavelet. The results show that the trend phase in July and January are nearly in-phase in Southwest and South China, but are out-of-phase in other regions. Reconstruction of original temperature series in each of the regions indicates that their change trends are consistent with the original temperature series.
文摘By using China National Climate Center’s 74 circulation characteristics, DERF2.0, BCC-CSM models and Wenzhou Typhoon Network data, and using linear regression, correlation coefficients and other research methods, the variations about typhoon frequency in July from 1951 to 2020 and the large-scale circulation system in July 2020 are analyzed. The results show that 1) in the recent 70 years, the frequency of typhoon generation has slowly decreased, while the frequency of landing typhoons in China has slowly increased;2) typhoon frequency has varying degrees of negative correlation with the intensity of subtropical high in different regions of the northern hemisphere, especially with the area index and intensity index of the South China Sea subtropical high;3) in July 2020, the area and intensity of the subtropical high in the Northwest Pacific were abnormally large and strong. Easterly winds prevailed in the tropics, and the cross-equatorial airflow was weak, resulting in a severe reduction in the frequency of typhoon generation, leading to “no-typhoon” events.
文摘As a famous English contemporary women writer, Doris Lessing always puts her attention on the female characters that live in South Africa. Their lives are pathetic and sad. This thesis tries to analyze one of Lessing's short stories— Winter in July from Lacan's three Orders approach. Lessing is a feminist, but the deeper description of the desire and struggle in men's inner world in her works is also remarkable.
