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  • 2000-2004  (3)
  • Key Words: Sichuan-Qinghai-Xizang (Tibet), seismic source, rupture, earthquake activity, single-link cluster.  (1)
  • Key words Carbonate rock weathering  (1)
  • PACS. 21.10.Tg Lifetimes – 21.60.Fw Models based on group theory – 23.20.Lv Gamma transitions and level energies – 27.60.+j 90≤A≤149  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Seismic Source Characteristics of Nine Strong Earthquakes from 1988 to 1990 and Earthquake Activity since 1970 in the Sichuan-Qinghai-Xizang (Tibet) Zone of China (2000)
    Springer
    Pure and applied geophysics 157 (2000), S. 1423-1443 
    Details
    ISSN: 1420-9136
    Keywords: Key Words: Sichuan-Qinghai-Xizang (Tibet), seismic source, rupture, earthquake activity, single-link cluster.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract —The Chinese provinces of Sichuan, Qinghai and Xizang (Tibet) are situated in a very active seismic zone. From 1988 to 1990, nine strong earthquakes (M 〉 5.9) occurred in these provinces. A method of analyzing seismic waveforms using apparent source time functions (aSTF) and apparent time differences (aTD) is adopted to derive rupture characteristics for the strong earthquakes. Combining the source characteristics with aftershock data, regional tectonics and geology, this paper examines the migration of strong earthquakes. The Qinghai earthquakes in this study were found to have strong reverse-slip faulting, which is different from the strike-slip focal mechanisms of past earthquakes in the region. The steepness of compressional axes of Sichuan earthquakes is related to the local complicated tectonics. Finally, the single-link cluster (SLC) method is used to analyze the spatial-temporal behavior of the all strong earthquakes that occurred in the region since 1970. The SLC analysis suggests that the patterns of earthquake activity can be identified well and that continental earthquakes occur seemingly with basic regularity.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/PL00001127
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  • 2
    Electronic Resource
    Electronic Resource
    Contribution of carbonate rock weathering to the atmospheric CO2 sink (2000)
    Springer
    Environmental geology 39 (2000), S. 1053-1058 
    Details
    ISSN: 1432-0495
    Keywords: Key words Carbonate rock weathering ; Soil CO2 ; Atmospheric CO2 sink
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Abstract To accurately predict future CO2 levels in the atmosphere, which is crucial in predicting global climate change, the sources and sinks of the atmospheric CO2 and their change over time must be determined. In this paper, some typical cases are examined using published and unpublished data. Firstly, the sensitivity of carbonate rock weathering (including the effects by both dissolution and reprecipitation of carbonate) to the change of soil CO2 and runoff will be discussed, and then the net amount of CO2 removed from the atmosphere in the carbonate rock areas of mainland China and the world will be determined by the hydrochem-discharge and carbonate-rock-tablet methods, to obtain an estimate of the contribution of carbonate rock weathering to the atmospheric CO2 sink. These contributions are about 0.018 billion metric tons of carbon/a and 0.11 billion metric tons of carbon/a for China and the world, respectively. Further, by the DBL (Diffusion Boundary Layer)-model calculation, the potential CO2 sink by carbonate rock dissolution is estimated to be 0.41 billion metric tons of carbon/a for the world. Therefore, the potential CO2 source by carbonate reprecipitation is 0.3 billion metric tons of carbon/a.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002549900072
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  • 3
    Electronic Resource
    Electronic Resource
    DSA lifetime measurements and structure of positive-parity bands of 120Xe (2000)
    Springer
    The European physical journal 9 (2000), S. 293-297 
    Details
    ISSN: 1434-601X
    Keywords: PACS. 21.10.Tg Lifetimes – 21.60.Fw Models based on group theory – 23.20.Lv Gamma transitions and level energies – 27.60.+j 90≤A≤149
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract: Lifetimes of excited states in 120Xe have been measured by the Doppler-shift attenuation method in the 111Cd( 12C,3n) reaction at a beam energy of E = 56 MeV. Lifetime values for 22 states were obtained. The excitation energies and E2-transition probabilities of the yrast band, γ-band and its continuation are interpreted in the framework of a version of IBFM (IBM + 2 q.p.). A reasonable description of the B(E2) behavior in the backbending region is achieved.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s100500070011
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    Paper (German National Licenses)
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