Indicators of Climate Change in the Middle Atmosphere using a New Climate Feedback-Response Analysis Method

Friday, 18 December 2015
Poster Hall (Moscone South)
William Swartz, Johns Hopkins University Applied Physics Laboratory, Space Exploration, Laurel, MD, United States, Xun Zhu, Johns Hopkins Univ, Laurel, MD, United States, Jeng-Hwa Yee, Applied Physics Laboratory Johns Hopkins, Laurel, MD, United States and Valentina Aquila, Johns Hopkins University, Earth and Planetary Science, Baltimore, MD, United States
We apply the recently developed middle atmosphere climate feedback-response analysis method (MCFRAM) to identify the distinctive characteristics of climate change as reflected in the middle atmosphere contributed from the external forcing and different feedback processes associated with changes in greenhouse gases and solar variability. The temperature responses to variations of CO2, O3, and solar flux have distinctly different spatial structures that can be systematically categorized by the eigenmodes of the generalized damping matrix derived from MCFRAM. The seasonality of the middle atmosphere climate sensitivity is also presented using MCFRAM diagnosis based on the output fields of various ensemble runs of the Goddard Earth Observing System chemistry-climate model (GEOSCCM).