000039741 001__ 39741 000039741 005__ 20240709074301.0 000039741 0247_ $$2DOI$$a10.1023/B:JOCH.0000034509.11746.b8 000039741 0247_ $$2WOS$$aWOS:000222603900001 000039741 037__ $$aPreJuSER-39741 000039741 041__ $$aeng 000039741 082__ $$a540 000039741 084__ $$2WoS$$aEnvironmental Sciences 000039741 084__ $$2WoS$$aMeteorology & Atmospheric Sciences 000039741 1001_ $$0P:(DE-HGF)0$$aStefanutti, L.$$b0 000039741 245__ $$aThe APE-THESEO tropical campaign: an overview 000039741 260__ $$aDordrecht [u.a.]$$bSpringer Science + Business Media B.V$$c2004 000039741 300__ $$a1 - 33 000039741 3367_ $$0PUB:(DE-HGF)16$$2PUB:(DE-HGF)$$aJournal Article 000039741 3367_ $$2DataCite$$aOutput Types/Journal article 000039741 3367_ $$00$$2EndNote$$aJournal Article 000039741 3367_ $$2BibTeX$$aARTICLE 000039741 3367_ $$2ORCID$$aJOURNAL_ARTICLE 000039741 3367_ $$2DRIVER$$aarticle 000039741 440_0 $$03073$$aJournal of Atmospheric Chemistry$$v48$$x0167-7764$$y1 000039741 500__ $$aRecord converted from VDB: 12.11.2012 000039741 520__ $$aThe APE-THESEO campaign was held from 15 February to 15 March 1999 from the Seychelles in the western Indian Ocean. APE-THESEO stands for 'Airborne Platform for Earth observation-(contribution to) the Third European Stratospheric Experiment on Ozone'. The campaign aimed to study processes controlling the low water content of the stratosphere, including the mechanisms of cloud formation in the tropical tropopause region, and transport processes, studied using measurements of long-lived trace gases and ozone.Two aircraft were used: the high-altitude research aircraft, M-55 Geophysica, which can fly up to 21 km, and the Falcon of the Deutsches Zentrum fur Luft- und Raumfahrt, a tropospheric aircraft. Seven flights were performed, including the first simultaneous in situ and remote sensing of sub-visible cirrus clouds, the first interception of sub-visible cirrus using in-flight guidance from a pathfinding aircraft, and guided descent of a high-altitude research aircraft into the anvil cloud at the top of a tropical cyclone. In this paper we describe the payload used, the objectives for each flight, and the meteorological conditions encountered. First results show that a new type of cloud, which we have dubbed ultra-thin tropical tropopause cloud (UTTC), has been observed frequently, and observed to cover areas of 10(5) km(2). The frequent coincidence of the tropopause and hygropause implies that the western Indian Ocean played an important role in the dehydration of the lower tropical stratosphere during the season of the mission. UTTCs, sub-visible cirrus, and visible cirrus, have all been implicated in the observed dehydration. Tracer measurements indicate little mixing of stratospheric air into the upper tropical troposphere. 000039741 536__ $$0G:(DE-Juel1)FUEK257$$2G:(DE-HGF)$$aChemie und Dynamik der Geo-Biosphäre$$cU01$$x0 000039741 588__ $$aDataset connected to Web of Science 000039741 650_7 $$2WoSType$$aJ 000039741 65320 $$2Author$$atropical tropopause 000039741 65320 $$2Author$$acirrus 000039741 65320 $$2Author$$aGeophysica 000039741 65320 $$2Author$$aMeteosat 5 000039741 65320 $$2Author$$aatmospheric water vapour 000039741 7001_ $$0P:(DE-HGF)0$$aMcKenzie, A. R.$$b1 000039741 7001_ $$0P:(DE-HGF)0$$aSantacesaria, V.$$b2 000039741 7001_ $$0P:(DE-HGF)0$$aAdriani, A.$$b3 000039741 7001_ $$0P:(DE-HGF)0$$aBalestri, S.$$b4 000039741 7001_ $$0P:(DE-HGF)0$$aBorrmann, S.$$b5 000039741 7001_ $$0P:(DE-HGF)0$$aKhattatov, V.$$b6 000039741 7001_ $$0P:(DE-HGF)0$$aMazinghi, P.$$b7 000039741 7001_ $$0P:(DE-HGF)0$$aMerkulov, S.$$b8 000039741 7001_ $$0P:(DE-HGF)0$$aMitev, V.$$b9 000039741 7001_ $$0P:(DE-HGF)0$$aRudakov, V.$$b10 000039741 7001_ $$0P:(DE-Juel1)VDB1410$$aSchiller, C.$$b11$$uFZJ 000039741 7001_ $$0P:(DE-HGF)0$$aToci, G.$$b12 000039741 7001_ $$0P:(DE-HGF)0$$aVolk, M.$$b13 000039741 7001_ $$0P:(DE-HGF)0$$aYushkov, V.$$b14 000039741 7001_ $$0P:(DE-HGF)0$$aFlentje, H.$$b15 000039741 7001_ $$0P:(DE-HGF)0$$aKiemle, C.$$b16 000039741 7001_ $$0P:(DE-HGF)0$$aNoone, K.$$b17 000039741 7001_ $$0P:(DE-HGF)0$$aRedaelli, G.$$b18 000039741 7001_ $$0P:(DE-HGF)0$$aCarslaw, K. S.$$b19 000039741 7001_ $$0P:(DE-HGF)0$$aPeter, Th.$$b20 000039741 773__ $$0PERI:(DE-600)1475524-5$$a10.1023/B:JOCH.0000034509.11746.b8$$gVol. 48, p. 1 - 33$$p1 - 33$$q48<1 - 33$$tJournal of atmospheric chemistry$$v48$$x0167-7764$$y2004 000039741 909CO $$ooai:juser.fz-juelich.de:39741$$pVDB 000039741 9131_ $$0G:(DE-Juel1)FUEK257$$bEnvironment (Umwelt)$$kU01$$lChemie und Dynamik der Geo-Biosphäre$$vChemie und Dynamik der Geo-Biosphäre$$x0 000039741 9141_ $$y2004 000039741 915__ $$0StatID:(DE-HGF)0010$$aJCR/ISI refereed 000039741 9201_ $$0I:(DE-Juel1)VDB47$$d31.12.2006$$gICG$$kICG-I$$lStratosphäre$$x0 000039741 970__ $$aVDB:(DE-Juel1)52651 000039741 980__ $$aVDB 000039741 980__ $$aConvertedRecord 000039741 980__ $$ajournal 000039741 980__ $$aI:(DE-Juel1)IEK-7-20101013 000039741 980__ $$aUNRESTRICTED 000039741 981__ $$aI:(DE-Juel1)ICE-4-20101013 000039741 981__ $$aI:(DE-Juel1)IEK-7-20101013