Comparative Analysis Between ERWIN II and WACCAM-X in High-Latitude Regions

The Neutral Winds (Zonal and Meridional winds) between ~ 87 km to ~ 97 km as observed by The Advanced E-Region Wind Interferometer (ERWIN II), located at Eureka, Nunavut, Northern Canada (80 N, 86 W), are utilized to compare with specified dynamics in the Whole Atmosphere Community Climate Model with thermosphere and ionosphere extension (SD-WACCM-X) from November 2017 to February 2018. This study aims to evaluate the model's performance against real observations in the high-latitude region. A Lomb-Scargle Periodogram is conducted on the ERWIN data to compare with the Fast Fourier Transform (FFT) of the WACCAM-X data across the entire footprint of the interferometer at three different altitudes: the Oxygen green line (O(S)) at an altitude of ~97 km, the pQ(7) and P(7) emission lines in the O2 at ~93 km, and the P1(3) emission line in hydroxyl Meinel at ~87 km. The goal is to identify diurnal, semidiurnal, and terdiurnal tidal features, as well as stationary planetary waves. The comparison reveals an acceptable signature for the three main modes of tides between both datasets. Additionally, there is evidence of a stationary planetary wave in the model during the winter of 2017. The analysis also identifies a clear signature of the February 2017 Sudden Stratospheric Warming (SSW), which occurred from February 11th to 18th. The tidal modes and the SSW are further characterized using Fourier-Wavelet spectrum analysis in the E-region of the atmosphere. Comparisons of background winds, planetary signatures and tidal signatures SD-WACCAM-X and ERWIN datasets will be discussed.