Based on the circumfluence situation of the out- and in-Tibet Plateau Vortex (TPV) from 1998–2004 and its weather-influencing system,multiple synthesized physical fields in the middle–upper troposphere of the out- a...Based on the circumfluence situation of the out- and in-Tibet Plateau Vortex (TPV) from 1998–2004 and its weather-influencing system,multiple synthesized physical fields in the middle–upper troposphere of the out- and in-TPV are computationally analyzed by using re-analysis data from National Centers for Environmental Prediction and National Center for Atmospheric Research (NCEP/NCAR) of United States.Our research shows that the departure of TPV is caused by the mutual effects among the weather systems in Westerlies and in the subtropical area,within the middle and the upper troposphere.This paper describes the large-scale meteorological condition and the physics image of the departure of TPV,and the main differences among the large-scale conditions for all types of TPVs.This study could be used as the scientific basis for predicting the torrential rain and the floods caused by the TPV departure.展开更多
从卫星云图、环流形势、水汽输送和冷平流作用等方面出发,对2000—2015年发生在青藏高原东北侧的中尺度对流复合体(MCC)进行综合分析,寻求该区域MCC特征,以有效提高该地区此类天气的预报、预警及防灾减灾服务能力。结果表明,2000—2015...从卫星云图、环流形势、水汽输送和冷平流作用等方面出发,对2000—2015年发生在青藏高原东北侧的中尺度对流复合体(MCC)进行综合分析,寻求该区域MCC特征,以有效提高该地区此类天气的预报、预警及防灾减灾服务能力。结果表明,2000—2015年,青藏高原东北侧MCC出现在秦岭南侧的占66%,多形成于后半夜;秦岭北侧的占34%,基本发生于傍晚至凌晨。MCC多出现在200 h Pa南亚高压反气旋的东北侧;对流层中低层,甘南、四川东部地区有低涡或切变配合;地面上,四川东部及陕南多为稳定少动的热低压控制。MCC发生时,南亚高压、低涡或切变相应东移,地面热低压北移,其北侧的冷高压同步南压明显。秦岭南侧的MCC多以对流单体发展或对流云团合并加强形成,此类MCC北伸、东移特征明显;秦岭北侧的MCC多为冷锋云系前部暖区的对流云团发展形成,该类MCC东移特征明显。青藏高原东北侧MCC的强降水往往出现在TBB梯度最大一侧,最大小时降雨量与TBB最低时段匹配较好。展开更多
As a result of the left-lateral strike-slipping of the Altyn Tagh fault in Neotectonic period, a contra-rotational structure, namely the Zhaobishan vortex structure, has developed at the juncture of the main Altyn Tag...As a result of the left-lateral strike-slipping of the Altyn Tagh fault in Neotectonic period, a contra-rotational structure, namely the Zhaobishan vortex structure, has developed at the juncture of the main Altyn Tagh fault and the northern fringe fault of the Qilian Mountains. Preliminary analysis on the deformation and evolution of the Zhaobishan vortex structure. In combination with the previous data, suggests that the tectonic transform between the Altyn Tagh fault and the northern fringe fault of the Qilian Mountains attributes to the deformation of the rotational structure. The existence of a series of rotational structures along the Altyn Tagh fault and on the northeastern edge of the Qinghai-Xizang(Tibet) plateau indicate that as the substance in the northern Qinghai-Xizang (Tibet) plateau moves clockwise around the eastern tectonic knot of the Himalayas, rotational structures become the principal mode on the northern marginal zone of the Plateau of transforming and absorbing tectonic deformation.展开更多
基金Supported by the Natural Science Foundation of China,No40475020Special Project of National Sci./Tech. Basic Research No 2006FY220300
文摘Based on the circumfluence situation of the out- and in-Tibet Plateau Vortex (TPV) from 1998–2004 and its weather-influencing system,multiple synthesized physical fields in the middle–upper troposphere of the out- and in-TPV are computationally analyzed by using re-analysis data from National Centers for Environmental Prediction and National Center for Atmospheric Research (NCEP/NCAR) of United States.Our research shows that the departure of TPV is caused by the mutual effects among the weather systems in Westerlies and in the subtropical area,within the middle and the upper troposphere.This paper describes the large-scale meteorological condition and the physics image of the departure of TPV,and the main differences among the large-scale conditions for all types of TPVs.This study could be used as the scientific basis for predicting the torrential rain and the floods caused by the TPV departure.
文摘从卫星云图、环流形势、水汽输送和冷平流作用等方面出发,对2000—2015年发生在青藏高原东北侧的中尺度对流复合体(MCC)进行综合分析,寻求该区域MCC特征,以有效提高该地区此类天气的预报、预警及防灾减灾服务能力。结果表明,2000—2015年,青藏高原东北侧MCC出现在秦岭南侧的占66%,多形成于后半夜;秦岭北侧的占34%,基本发生于傍晚至凌晨。MCC多出现在200 h Pa南亚高压反气旋的东北侧;对流层中低层,甘南、四川东部地区有低涡或切变配合;地面上,四川东部及陕南多为稳定少动的热低压控制。MCC发生时,南亚高压、低涡或切变相应东移,地面热低压北移,其北侧的冷高压同步南压明显。秦岭南侧的MCC多以对流单体发展或对流云团合并加强形成,此类MCC北伸、东移特征明显;秦岭北侧的MCC多为冷锋云系前部暖区的对流云团发展形成,该类MCC东移特征明显。青藏高原东北侧MCC的强降水往往出现在TBB梯度最大一侧,最大小时降雨量与TBB最低时段匹配较好。
文摘As a result of the left-lateral strike-slipping of the Altyn Tagh fault in Neotectonic period, a contra-rotational structure, namely the Zhaobishan vortex structure, has developed at the juncture of the main Altyn Tagh fault and the northern fringe fault of the Qilian Mountains. Preliminary analysis on the deformation and evolution of the Zhaobishan vortex structure. In combination with the previous data, suggests that the tectonic transform between the Altyn Tagh fault and the northern fringe fault of the Qilian Mountains attributes to the deformation of the rotational structure. The existence of a series of rotational structures along the Altyn Tagh fault and on the northeastern edge of the Qinghai-Xizang(Tibet) plateau indicate that as the substance in the northern Qinghai-Xizang (Tibet) plateau moves clockwise around the eastern tectonic knot of the Himalayas, rotational structures become the principal mode on the northern marginal zone of the Plateau of transforming and absorbing tectonic deformation.
