Search

Thermal tropopause represents the region of the atmosphere where the environmental lapse rate changes from tropospheric positive to stratospheric negative. It also defines the altitude of the atmosphere beneath which significant weather perturbations occur except occasional overshooting thunderstorms in the tropical regions. Accordingly, how the temporal and spatial variability of thermal tropopause behaves is of great concern in atmospheric research and, hence, investigated in this study by using radio occultation (RO) observations obtained from seven space missions during the period from May 2001 to April 2013 (with a total of 6,075,359 occultations). While RO observations have been demonstrated to provide precise measurements of temperature profiles of the atmosphere, their results are inter-compared before further use in our analysis, showing expected high-precision observations with mean differences

On the basis of knowledge architecture theories, the author put forward to elaborate the construction of the subject knowledge platform from perspectives of resource construction, systematic framework and service function. By strengthening construction of internet academic resources, expert academic resources and expanded academic resources, an academic sharing space is built where subject librarians and scientific research users can commonly participate in, mutually interact and share knowledge with each other. A platform is established for information exchange and sharing, and provide personalized customization of subject resources and RSS push services so as to realize the acquisition, organization, mining, development and innovation of subject knowledge. A service platform is provided for scientific research users with multiple-service customization and multiple-resource integration.