Variability features of the width of the tropical belt from COSMIC radio occultation data  

作　　者：GAO Pan ZHANG XiaoHong XU XiaoHua 

机构地区：[1]School of Geodesy and Geomatics, Wuhan University, Wuhan 430079, China [2]Collaborative Innovation Center for Geospatial Technology, Wuhan 430079, China

出　　处：《Science China Earth Sciences》2016年第4期795-802,共8页中国科学（地球科学英文版）

基　　金：supported by the National Natural Science Foundation of China(Grant No.41374036);the National Key Basic Research Program of China(Grant No.2013CB733301);the Funds for Innovative Research Groups of the National Natural Science Foundation of China(Grant No.41021061);the Fundamental Research Funds for the Central Universities

摘　　要：In this work, we analyzed time-series and trends of the tropical belt edges and widths with three methods based on the tropopause using new global positioning system radio occultation(GPS RO) data from the Constellation Observing System for Meteorology, Ionosphere, and Climate(COSMIC) mission for September 2006–February 2014. The results from the three methods agreed well with previous studies and new features were found. To avoid the El Ni?o Southern Oscillation(ENSO) and Quasi-Biennial Oscillation(QBO) influence, we applied a simple multiple linear regression model to the monthly anomalies to obtain the tropical belt edges and width trends. During the study, we found equatorward movements of the tropical belt edges on both hemispheres. The narrowing of the tropical belt mainly occurred in the Pacific Ocean. We also found that the deseasonalized monthly anomalies of the tropical belt width were closely related with the ENSO and QBO. The tropical belt at a height of 15 km was mostly closely related with the ENSO. The correlations between the QBO and the tropical belt were consistent for the three methods.In this work, we analyzed time-series and trends of the tropical belt edges and widths with three methods based on the tropopause using new global positioning system radio occultation（GPS RO） data from the Constellation Observing System for Meteorology, Ionosphere, and Climate（COSMIC） mission for September 2006–February 2014. The results from the three methods agreed well with previous studies and new features were found. To avoid the El Ni？o Southern Oscillation（ENSO） and Quasi-Biennial Oscillation（QBO） influence, we applied a simple multiple linear regression model to the monthly anomalies to obtain the tropical belt edges and width trends. During the study, we found equatorward movements of the tropical belt edges on both hemispheres. The narrowing of the tropical belt mainly occurred in the Pacific Ocean. We also found that the deseasonalized monthly anomalies of the tropical belt width were closely related with the ENSO and QBO. The tropical belt at a height of 15 km was mostly closely related with the ENSO. The correlations between the QBO and the tropical belt were consistent for the three methods.

关 键 词：COSMIC GPS Radio Occultation Tropical belt width TROPOPAUSE 

分 类 号：P228.4[天文地球—大地测量学与测量工程] P732[天文地球—测绘科学与技术]