气候适宜期 meaning in English

climatic optimum
thermal maximum

And during the little ice age ) . the main discrepancy of climatic and environmental changes of the southern margin of tarim basin and the eastern region of china appeared to be the collocation patterns which were the synchronism in cold or warm conditions and the difference in hydrological conditions . meanwhile , the discoveries of abrupt climate changes in the past have raised an urgent request for paleoclimatic and paleoenvironmental records
( 2 ) 、中全新世气候适宜期( 6 . 7 3 . 0kab . p . )尤其是近4 . 0ka以来及小冰期，南疆塔里木盆地南缘与我国东部季风区存在着冷、暖同步，干、湿相异的特征；并以相对冷湿? ?相对暖干的演变模式与我国东部季风区的相对冷干? ?相对暖湿的特征相区别。