赤せき道どう気き団だんせきどうきだんMeanings1nounequatorial air massMeteorological term for a warm, humid air mass originating near the equator.赤せき道どう気き団だんは高こう温おん多た湿しつで、日本にほんの梅雨つゆに影えい響きょうを与あたえる。The equatorial air mass is hot and humid, and influences Japan's rainy season.