Preprints
https://doi.org/10.5194/acpd-6-12469-2006
https://doi.org/10.5194/acpd-6-12469-2006
04 Dec 2006
 | 04 Dec 2006
Status: this preprint was under review for the journal ACP. A revision for further review has not been submitted.

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

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

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.

Publisher's note: Copernicus Publications remains neutral with regard to jurisdictional claims made in the text, published maps, institutional affiliations, or any other geographical representation in this preprint. The responsibility to include appropriate place names lies with the authors.
G. Durry, N. Huret, A. Hauchecorne, V. Marecal, J.-P. Pommereau, R. L. Jones, G. Held, N. Larsen, and J.-B. Renard
 
Status: closed (peer review stopped)
Status: closed (peer review stopped)
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
Printer-friendly Version - Printer-friendly version Supplement - Supplement
 
Status: closed (peer review stopped)
Status: closed (peer review stopped)
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
Printer-friendly Version - Printer-friendly version Supplement - Supplement
G. Durry, N. Huret, A. Hauchecorne, V. Marecal, J.-P. Pommereau, R. L. Jones, G. Held, N. Larsen, and J.-B. Renard
G. Durry, N. Huret, A. Hauchecorne, V. Marecal, J.-P. Pommereau, R. L. Jones, G. Held, N. Larsen, and J.-B. Renard

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