An Analysis of the Temporal and Spatial Variations of the Global Tropopause with COSMIC Radio Occultation Bending Angles

摘要: As the transition layer between troposphere and stratosphere, structure of tropopause is closely related to weather climate near-surface layer. The variation parameters including height, temperature pressure are sensitive indicators variability global change. Characterized by advantages high vertical resolution, low-cost, coverage, all-weather capability, Global Positioning System (GPS) radio occultation (RO) technology provides rich observation data for study structure. precise identification height prerequisite accurate determination pressure. identified from GPS RO profile will be affected errors brought out assumptions prior atmosphere background applied in inversion process profile. To determine directly bending angle an effective way avoid such errors. In this paper, natural logarithm objective covariance transform method used identify profiles. With Constellation Observing Meteorology, Ionosphere Climate (COSMIC) mission, spatial temporal variations included analyzed. It found that latitudinal distribution characteristics distinct seasonal trends significant. also distributions asymmetric over northern southern hemispheres.