Based on the 155 years global monthly mean sea surface pressure data (Jan. 1850-Dec. 2004) from Hadley Centre, the time spatial change and sudden characteristics of the Winter Mongolia High are studied. First, the w...Based on the 155 years global monthly mean sea surface pressure data (Jan. 1850-Dec. 2004) from Hadley Centre, the time spatial change and sudden characteristics of the Winter Mongolia High are studied. First, the winter SLP distribution in Asia and the North Pacific are analyzed by the EOF method. Second, main cycle sequences of the Winter Mongolia High are reconstructed by the Singular Spectrum Analysis method, with special emphasis on the interdecadal periodic changes. Finally, the abrupt climate change is examined by the Mann-Kendall method. Results show that the Winter Mongolia High has quasi-biennial oscillation and a 3-4-year cycle of interannual change, also has a decadal variation for the 13-14-year cycle and interdecadal cycles for 20-21 years and 35-36 years. The 20-21-year cycle of WMHI is of the opposite phase to Aleutian Low, while the 35-36-year cycle is of the same phase. Otherwise, a significant abrupt climate change point in 1927 has been detected.展开更多
利用山西省58个台站1960~2009年夏季降水资料和NCAR/NCEP逐月再分析资料,在考虑蒙古中纬度地区和西太平洋副热带地区大气环流特征的基础上,根据海陆气压差建立了东亚副热带夏季风指数,并研究该指数与山西省夏季降水的关系。结果表...利用山西省58个台站1960~2009年夏季降水资料和NCAR/NCEP逐月再分析资料,在考虑蒙古中纬度地区和西太平洋副热带地区大气环流特征的基础上,根据海陆气压差建立了东亚副热带夏季风指数,并研究该指数与山西省夏季降水的关系。结果表明:东亚副热带夏季风指数IS S M表现出明显的长期气候变化趋势,20世纪60~70年代以正值为主,而70年代末之后以负值为主。ISSM指数能够很好地反映出蒙古低压和西太平洋副热带高压系统的典型特征。东亚副热带夏季风越强对应着山西夏季降水越多,山西中部、南部偏东的大部分区域属于东亚副热带夏季风控制区,运城盆地、西部高原山地、忻州盆地、大同盆地等属于东亚副热带夏季风西北边缘区。展开更多
本文使用D/max-2500X射线衍射仪研究了内蒙古锡林郭勒地区上古生界泥质岩石伊利石的成因标志,讨论了有机质镜质体反射率对变质温度的表征。研究区上古生界泥质岩石伊利石的标型特征为:伊利石结晶度分布于0.28~>0.77之间,平均值0.40...本文使用D/max-2500X射线衍射仪研究了内蒙古锡林郭勒地区上古生界泥质岩石伊利石的成因标志,讨论了有机质镜质体反射率对变质温度的表征。研究区上古生界泥质岩石伊利石的标型特征为:伊利石结晶度分布于0.28~>0.77之间,平均值0.40;伊利石(白云母)多型以2M1型为主,2M1+1Md多型和1Md多型相对较少;伊利石(白云母)b0值变化于8.983~9.046之间,平均值9.019,指示其形成于成岩-极低级变质作用。有机质镜质体反射率具有示踪变质温度的作用,应用Barker and Pawlewiez(1986,1994)、Barker and Goldsteinl(1990)和Mullis et al.(2001)建立的镜质体反射率地质温度计,对研究区上古生界泥质岩石变质温度进行了估算,揭示古地温处于136~321℃之间,温度估算值主要分布在180~260℃之间,平均值为245℃,这表明研究区上古生界遭受了成岩-极低级变质作用,变质程度属近变质带。研究区上古生界泥质岩石的Ro值主要分布在1.01%~3.67%之间,表明有机质演化处于成熟-过成熟阶段,泥质岩石具有生烃的能力,部分层位可能具有形成油气资源的潜力。展开更多
基金supported by the National 973 project (No.2007CB411805)partly supported by the Lab for Applied Geophysics at Institute of Meteorology, PLA University of Science and Technology
文摘Based on the 155 years global monthly mean sea surface pressure data (Jan. 1850-Dec. 2004) from Hadley Centre, the time spatial change and sudden characteristics of the Winter Mongolia High are studied. First, the winter SLP distribution in Asia and the North Pacific are analyzed by the EOF method. Second, main cycle sequences of the Winter Mongolia High are reconstructed by the Singular Spectrum Analysis method, with special emphasis on the interdecadal periodic changes. Finally, the abrupt climate change is examined by the Mann-Kendall method. Results show that the Winter Mongolia High has quasi-biennial oscillation and a 3-4-year cycle of interannual change, also has a decadal variation for the 13-14-year cycle and interdecadal cycles for 20-21 years and 35-36 years. The 20-21-year cycle of WMHI is of the opposite phase to Aleutian Low, while the 35-36-year cycle is of the same phase. Otherwise, a significant abrupt climate change point in 1927 has been detected.
文摘利用山西省58个台站1960~2009年夏季降水资料和NCAR/NCEP逐月再分析资料,在考虑蒙古中纬度地区和西太平洋副热带地区大气环流特征的基础上,根据海陆气压差建立了东亚副热带夏季风指数,并研究该指数与山西省夏季降水的关系。结果表明:东亚副热带夏季风指数IS S M表现出明显的长期气候变化趋势,20世纪60~70年代以正值为主,而70年代末之后以负值为主。ISSM指数能够很好地反映出蒙古低压和西太平洋副热带高压系统的典型特征。东亚副热带夏季风越强对应着山西夏季降水越多,山西中部、南部偏东的大部分区域属于东亚副热带夏季风控制区,运城盆地、西部高原山地、忻州盆地、大同盆地等属于东亚副热带夏季风西北边缘区。
文摘本文使用D/max-2500X射线衍射仪研究了内蒙古锡林郭勒地区上古生界泥质岩石伊利石的成因标志,讨论了有机质镜质体反射率对变质温度的表征。研究区上古生界泥质岩石伊利石的标型特征为:伊利石结晶度分布于0.28~>0.77之间,平均值0.40;伊利石(白云母)多型以2M1型为主,2M1+1Md多型和1Md多型相对较少;伊利石(白云母)b0值变化于8.983~9.046之间,平均值9.019,指示其形成于成岩-极低级变质作用。有机质镜质体反射率具有示踪变质温度的作用,应用Barker and Pawlewiez(1986,1994)、Barker and Goldsteinl(1990)和Mullis et al.(2001)建立的镜质体反射率地质温度计,对研究区上古生界泥质岩石变质温度进行了估算,揭示古地温处于136~321℃之间,温度估算值主要分布在180~260℃之间,平均值为245℃,这表明研究区上古生界遭受了成岩-极低级变质作用,变质程度属近变质带。研究区上古生界泥质岩石的Ro值主要分布在1.01%~3.67%之间,表明有机质演化处于成熟-过成熟阶段,泥质岩石具有生烃的能力,部分层位可能具有形成油气资源的潜力。