caa a22 4500 445302208 CHVBK 20180317142601.0 cr unu---uuuuu 170323e20100201xx s 000 0 eng 10.1134/S0001433810010111 doi (NATIONALLICENCE)springer-10.1134/S0001433810010111 Humidity of the tropical lower stratosphere: Observations and analysis [Elektronische Daten] [S. Khaykin, V. Yushkov, L. Korshunov, A. Luk'yanov, J. Pommereau, J. Nielsen, H. Vömel] The results of measurements of water-vapor vertical profiles in the upper troposphere and stratosphere on board a meteorological balloon with a FLASH-B optical fluorescent hygrometer (Russia) are presented. These data were obtained during two international field campaigns in West Africa (August 2006) and Central America (August 2007). Eleven high-resolution water-vapor vertical profiles measured in the course of these works make it possible to characterize the processes controlling humidity in the tropical tropopause region. Layers with increased humidity are detected in the lower stratosphere over West Africa to the level of the potential temperature 450 K. An analysis of satellite maps of the brightness temperature, balloon ozone measurements, and aerosol scattering, as well as trajectory modeling, display the relation between the observed layers with increased humidity and the phenomena of convective overshooting of the tropopause, as a result of which cold and ozone-depleted air penetrates into the lower stratosphere together with ice particles, which, rapidly sublimating, locally increase the water-vapor concentration. A comparison of the humidity data obtained in West Africa in 2006 and in Central America in 2007 reveals substantial distinctions in values and vertical structures of water vapor, both in the tropopause region and in the middle stratosphere. Pleiades Publishing, Ltd., 2010 Khaykin S. Central Aerological Observatory, Pervomaiskaya ul. 3, 141700, Dolgoprudnyi, Moscow oblast, Russia aut Yushkov V. Central Aerological Observatory, Pervomaiskaya ul. 3, 141700, Dolgoprudnyi, Moscow oblast, Russia aut Korshunov L. Central Aerological Observatory, Pervomaiskaya ul. 3, 141700, Dolgoprudnyi, Moscow oblast, Russia aut Luk'yanov A. Central Aerological Observatory, Pervomaiskaya ul. 3, 141700, Dolgoprudnyi, Moscow oblast, Russia aut Pommereau J. Aeronomical Service, Verrieres-le-Buisson, France aut Nielsen J. Danish Meteorological Institute, Copenhagen, Denmark aut Vömel H. Richard Assman Meteorological Observatory, Lindenberg, Germany aut Izvestiya, Atmospheric and Oceanic Physics SP MAIK Nauka/Interperiodica 46/1(2010-02-01), 76-84 0001-4338 46:1<76 2010 46 11485 https://doi.org/10.1134/S0001433810010111 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1134/S0001433810010111 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Khaykin S. Central Aerological Observatory, Pervomaiskaya ul. 3, 141700, Dolgoprudnyi, Moscow oblast, Russia aut NATIONALLICENCE 700 1- Yushkov V. Central Aerological Observatory, Pervomaiskaya ul. 3, 141700, Dolgoprudnyi, Moscow oblast, Russia aut NATIONALLICENCE 700 1- Korshunov L. Central Aerological Observatory, Pervomaiskaya ul. 3, 141700, Dolgoprudnyi, Moscow oblast, Russia aut NATIONALLICENCE 700 1- Luk'yanov A. Central Aerological Observatory, Pervomaiskaya ul. 3, 141700, Dolgoprudnyi, Moscow oblast, Russia aut NATIONALLICENCE 700 1- Pommereau J. Aeronomical Service, Verrieres-le-Buisson, France aut NATIONALLICENCE 700 1- Nielsen J. Danish Meteorological Institute, Copenhagen, Denmark aut NATIONALLICENCE 700 1- Vömel H. Richard Assman Meteorological Observatory, Lindenberg, Germany aut NATIONALLICENCE 773 0- Izvestiya, Atmospheric and Oceanic Physics SP MAIK Nauka/Interperiodica 46/1(2010-02-01), 76-84 0001-4338 46:1<76 2010 46 11485 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer