HR: 0800h
AN: A21E-0771    [Abstracts]
TI: Water and Relative Humidity at the Tropical Tropopause
AU: * Schiller, C
EM: c.schiller@fz-juelich.de
AF: Forschungszentrum Juelich, ICG-1, Juelich, 52425, Germany
AU: Brunner, D
EM: Dominik.Brunner@empa.ch
AF: EMPA, Ueberlandstrasse 129, Duebendorf, 8600, Switzerland
AU: Konopka, P
EM: p.konopka@fz-juelich.de
AF: Forschungszentrum Juelich, ICG-1, Juelich, 52425, Germany
AU: Kraemer, M
EM: m.kraemer@fz-juelich.de
AF: Forschungszentrum Juelich, ICG-1, Juelich, 52425, Germany
AU: Shur, G
EM: genshur@caravan.ru
AF: CAO, 3, Pervomayskaya str., Dolgoprudny, 141700, Russian Federation
AU: Silva dos Santos, F
EM: f.h.silva.dos.santos@fz-juelich.de
AF: Forschungszentrum Juelich, ICG-1, Juelich, 52425, Germany
AU: Sitnikov, N
EM: sitnikov@caomsk.mipt.ru
AF: CAO, 3, Pervomayskaya str., Dolgoprudny, 141700, Russian Federation
AU: Spelten, N
EM: n.spelten@fz-juelich.de
AF: Forschungszentrum Juelich, ICG-1, Juelich, 52425, Germany
AB: Aircraft data of total water and water vapour from SCOUT-O3 (Australia), TROCCINOX (Brazil), AMMA (West Africa) and APE-THESEO (Indian Ocean) will be analyzed for the ice water content of cirrus and RHice at very low temperatures. Formation of ultrathin cirrus clouds and freeze-drying results in very low mixing ratios, sometimes below 2 ppmv. Deep convection leads to injection of moist air into the TTL and lower stratosphere. We will discuss the local cloud formation and dehydration processes as well as those having occurred before the observations analyzing the airmass history along backward trajectories.
DE: 3311 Clouds and aerosols
DE: 3334 Middle atmosphere dynamics (0341, 0342)
DE: 3362 Stratosphere/troposphere interactions
SC: Atmospheric Sciences [A]
MN: 2007 Fall Meeting