摘要：A grating spectrometer for hydroxyl (OH) airglow installed at Syowa Station (69°S, 39.6°E) by the 49th Japanese Antarctic Research Expedition (JARE49) has been in operation since late February, 2008.A dataset of 153 nights was acquired at this location in the austral winter season of 2008.This dataset shows variations in the rotational temperature over a range of temporal scales.The rotational temperature around the polar mesopause region is high in winter and decreases toward summer, which is a pattern similar to that observed at Davis Station, located at almost the same latitude as Syowa Station.A large temperature variation with a period of several days was observed in early May, 2008.Based on a comparison with a simultaneous dataset obtained by the SABER instrument onboard the TIMED satellite, it is inferred that this rotational temperature variation was due to the modulation of vertical motions around the mesopause.
关键词：Hydroxyl airglow ;OH rotational temperature ;Antarctic ;Syowa Station ;mesopause ;ground-based observations
