Science

1. Highlights Science reference Solar Cycle Effects and Long-Term Trends in Temperature Science • After taking the Mount Pinatubo warming into account, temperature trends on the order of ~1 K per decade were deduced, in general agreement with the prediction of global climate models, SMTLM and HAMMONIA. • The same data set is used to determine temperature response to the 27-day solar flux variability, (c), and to ENSO (not shown). She, C.-Y., D. A. Krueger, R. Akmaev, H. Schmidt and E. Talaat and S. Yee (2009), Long-term variability in mesopause region temperatures over Fort Collins, CO (41°N, 105°W) based on lidar observations from 1990 through 2007, J. Atmos. and Solar-Terr. Phys., 71, 1558–1564, doi:10.1016/j.jastp.2009.05.007. Krueger, D. A. and C.-Y. She, Seasonal variability in mesopause region temperatures over Fort Collins, CO (41°N, 105°W) based on lidar observations, 1991 through 2007, J. Atmos. and Solar-Terr. Phys., 71, 1565–1570, doi:10.1016/j.jastp.2009.06.003.

2. Highlights Science reference The impacts of Sudden Stratospheric Warming Event in MLT region of midlatitude. Science • Sudden Stratospheric Warming, typically a polar region event, has long been considered the most dramatic atmospheric event due to its deep and global scale impact on the atmosphere. The 2009 event is believed to be the strongest and longest SSW event ever recorded. • CSU Na lidar 3-day continuous observations during the peak of this event revealed a significant cooling below 90 km and a reversal of zonal wind profile, along with meridional wind changing from northward to southward. With simultaneous observation of mean temperature and wind profiles, this data set showed comprehensive influences of SSW in midlatitude MLT. Yuan, T., C. Y. She and D. Krueger (2010), Lidar Study of Sudden Stratospheric Warming events’ impacts on midlatitude mesopause region temperature, and winds. (Submitted to JGR)