Temperature measurements during the CAMP program |
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Authors: | CR Philbrick J Barnett R Gerndt D Offermann WR Pendleton P Schlyter G Witt JF Schmidlin |
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Institution: | 1. AFGL, Hanscom AFB, MA 01730, U.S.A.;7. Oxford University, Oxford OX1 3PU, U.K.;71. University of Wuppertal, D-5600 Wuppertal, F.R.G.;2. Utah State University, Logan, Utah 84322, U.S.A.;3. University of Stockholm, S-10691 Stockholm, Sweden;4. NASA Wallops, Wallops Island, VA 23337, U.S.A. |
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Abstract: | The Cold Arctic Mesopause Program (CAMP) was conducted at ESRANGE, Sweden, in July/August 1982. During the time period of several weeks, the temperature was monitored by ground-based OH emission spectrometers and by stellite radiance measurements. Rocket launchings occurred on the nights of and August. On August, seven rocket payloads were launched during a period of noctilucent cloud sighting over ESRANGE. The presence of the NLC was confirmed by several rocket-borne photometer profiles. The temperature measurements showed that the temperature profiles in the stratosphere and lower mesosphere were near the expected values of high latitude summer models. A large amplitude wave structure with three temperature minima of 139K, 114K and 111K were observed at altitudes between 83 and 94 km. The temperature minimum at 83 km was the location of the observed NLC. The temperature minima caused by the growth of the gravity wave amplitude in the highly stable mesosphere provide the regions for the growth of particles by nucleation to optical scattering size, as well as regions where the nuclei for condensation can be formed through ion chemistry paths. |
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