“大年”的春夏秋冬的四时变化是古环境变迁的主旋律近年来,环境污染问题已日益引起人们的不安和关注,于是人们很自然地把目光转向古环境问题。讲到古环境的变迁,自然联想到古气候的变迁。毫无疑问,古气候变迁是古环境变迁的核心内容。古气候学是20世纪发展最快的学科之一,如今 The Four Seasons of Spring, Summer, Autumn, Winter and Autumn are the Themes of Changes in Ancient Environment In recent years, the problem of environmental pollution has caused people’s anxiety and concern more and more. People are naturally turning their attention to ancient environmental problems. Speaking of the vicissitudes of ancient environment, naturally reminiscent of ancient climate changes. There is no doubt that the ancient climate change is the core content of ancient environmental changes. Pale-climatology is one of the fastest-growing disciplines in the 20th century and today