The vertical and spatial structure of ENSO in the upper troposphere and lower stratosphere from GPS radio occultation measurements

摘要: [1] The vertical and spatial structure of the atmospheric El Nino-Southern Oscillation (ENSO) signal is investigated using radio occultation (RO) data from August 2006 to December 2010. Due their high resolution global coverage, RO are well suited describe full 3-dimensional ENSO in troposphere lower stratosphere. We find that interannual temperature anomalies equatorial region show a natural decomposition into zonal-mean eddy (deviations zonal-mean) components both related ENSO. Consistent with previous studies, we during warm phase ENSO, temperatures increase tropical decrease Maximum warming occurs above 8 km, transition between cooling near tropopause. This response lags sea surface eastern Pacific by 3 months. component, contrast, responds rapidly (within 1 month) forcing. features low-latitude dipole Indian Oceans, off-equatorial maxima centered around 20 30 latitude hemispheres. pattern attains maximum amplitude upper 11 km (with opposite polarity) shallow layer tropopause at approximately 17 km. tends be out-of-phase low middle latitudes Citation: Scherllin-Pirscher, B., C. Deser, S.-P. Ho, Chou, W. Randel, Y.-H. Kuo (2012), stratosphere GPS measurements, Geophys. Res. Lett., 39, L20801, doi:10.1029/2012GL053071.