Isentropic advection and convective lifting of water vapor in the UT – LS as observed over Brazil 22° S in February 2004 by in situ high-resolution measurements of H2O, CH4, O3 and temperatureReportar como inadecuado




Isentropic advection and convective lifting of water vapor in the UT – LS as observed over Brazil 22° S in February 2004 by in situ high-resolution measurements of H2O, CH4, O3 and temperature - Descarga este documento en PDF. Documentación en PDF para descargar gratis. Disponible también para leer online.

1 SA - Service d-aéronomie 2 GSMA - Groupe de spectrométrie moléculaire et atmosphérique 3 LPCE - Laboratoire de physique et chimie de l-environnement 4 Center for Atmospheric Science

Abstract : The micro-SDLA balloonborne diode laser spectrometer was flown twice from Bauru 22° S, Brazil in February 2004 during HIBISCUS to yield in situ H2O measurements in the Upper Troposphere UT and Lower Stratosphere LS and in particular in the Tropical Tropopause Layer TTL. The overall TTL was found warmer with a subsaturated cold point near –79°C and the LS moister compared to former measurements obtained in tropical oceanic conditions. The use of specific balloons with a slow descent, combined with the high-resolution of the laser sensor, allowed us to observe in situ in the UT, the TTL and the LS several thin layers correlated on H2O, CH4, O3, temperature and PV. A component of these layers is associated with the isentropic transport into the UT- LS of extratropical stratospheric air masses. Moreover, the examination of temperature and tracer CH4, O3 profiles gives insights on the potential contribution of convective transport of H2O in the TTL.





Autor: G. Durry - N. Huret - A. Hauchecorne - V. Marecal - J.-P. Pommereau - R. L. Jones - G. Held N. Larsen J.-B. Renard -

Fuente: https://hal.archives-ouvertes.fr/



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