Articles | Volume 35, issue 2
Ann. Geophys., 35, 295–309, 2017
Ann. Geophys., 35, 295–309, 2017

Regular paper 28 Feb 2017

Regular paper | 28 Feb 2017

Double-layer structure in polar mesospheric clouds observed from SOFIE/AIM

Haiyang Gao et al.

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We find double-layer structure events with percentages of 10.32 and 7.25 % compared to total PMCs events, and the mean distances between two peaks are 3.06 and 2.73 km for the NH and SH respectively using SOFIE data from 2007 to 2014. By analysis of the background temperature and water vapour residual profiles, we conclude that the lower layer is a reproduced one formed at the bottom of the upper layer. These structures have close relationships with temperature enhancements and GWs.