地球古气候问题近年来颇引人关注,研究工作取得很大进展.2001年4月27日美国“科学”(Science)杂志刊出了关于地球古气候问题的专辑,除一篇引言(题名“过去地球变动的气候”)外,共有7篇文章. 第一篇文章叙述了了解地球过去气候的各种方法.简单地说这些方法的依据有树木年轮;花粉 The paleoclimatic issue of the earth has drawn considerable attention in recent years and great progress has been made in the research work. On April 27, 2001, the United States published an album on the issue of paleoclimatic problems on the Earth. Except for an introduction (entitled “ A total of seven articles, in addition to the Earth’s past climate. ”The first article described various ways of understanding the past climate of the Earth, which is simply based on tree rings, pollen