Polar Mesospheric Clouds (PMCs) have been suggested to be a sensitive indicator of long-term atmospheric change in the polar summer mesopause region due to increasing greenhouse gases and solar effects. [Thomas, 1996]. IAP scientists [Lubken, Berger et al.] have suggested that cooling in the stratosphere and mesosphere causes a shrinking of the atmosphere that extends to PMC heights. Recently, Hervig et al. [2016] concluded that both the cooling in the stratosphere and mesosphere and increasing H₂O contribute to increasing PMCs over the last 36 years observed by the SBUV series of satellites. 2017 marked the 10^th year anniversary of SOFIE (2007-) measurements. With this long dataset, we study the long-term variability of H₂O and CH₄ from SOFIE, including linear trends, solar cycle response and other naturally occurring periodicity. The change of SOFIE H₂O and CH₄ at high latitudes will be compared with the theoretical estimation in Hervig et al. [2016]. Depending on the data processing status, we may present the updated long term variability of SABER H₂O which covers the low and mid latitudes.