Abstract: Es (Sporadic E) layers are ionization enhancements in the E region of ionospheres, whose electron density can achieve one hundred times of background E in some times. Es layers intensity and appearance probability are anomalous on the earth, which mostly distribute in the midlatitude and lowlatitude. In the polar region, the Es layers are also strong and have unique characteristics. The study of polar region Es is very important for researching the physical mechanism of Es. This paper using the observation data of station Syowa (69.0°S, 39.6°E) in Japan, which is more than 40 years, has studied the intensity characteristics, the day changes, the season changes and the longtime changes of the Es in Antarctica using h’Es and foes.

Key words: Sporadic E layers, morphology characteristics, Antarctica