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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$$c2004
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000039741 440_0 $$03073$$aJournal of Atmospheric Chemistry$$v48$$x0167-7764$$y1
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000039741 520__ $$aThe APE-THESEO campaign was held from 15 February to 15 March 1999 from the Seychelles in the western Indian Ocean. APE-THESEO stands for 'Airborne Platform for Earth observation-(contribution to) the Third European Stratospheric Experiment on Ozone'. The campaign aimed to study processes controlling the low water content of the stratosphere, including the mechanisms of cloud formation in the tropical tropopause region, and transport processes, studied using measurements of long-lived trace gases and ozone.Two aircraft were used: the high-altitude research aircraft, M-55 Geophysica, which can fly up to 21 km, and the Falcon of the Deutsches Zentrum fur Luft- und Raumfahrt, a tropospheric aircraft. Seven flights were performed, including the first simultaneous in situ and remote sensing of sub-visible cirrus clouds, the first interception of sub-visible cirrus using in-flight guidance from a pathfinding aircraft, and guided descent of a high-altitude research aircraft into the anvil cloud at the top of a tropical cyclone. In this paper we describe the payload used, the objectives for each flight, and the meteorological conditions encountered. First results show that a new type of cloud, which we have dubbed ultra-thin tropical tropopause cloud (UTTC), has been observed frequently, and observed to cover areas of 10(5) km(2). The frequent coincidence of the tropopause and hygropause implies that the western Indian Ocean played an important role in the dehydration of the lower tropical stratosphere during the season of the mission. UTTCs, sub-visible cirrus, and visible cirrus, have all been implicated in the observed dehydration. Tracer measurements indicate little mixing of stratospheric air into the upper tropical troposphere.
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000039741 65320 $$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
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