摘要
通过近十几年来利用大气环流模式对古气候模拟的研究,指出数值模拟方法应用于古气候研究的优点,介绍了对中白垩纪、新生代晚期、末次冰期等几个典型地质时期的数值模拟情况和古气候模拟所取得的主要成果。
Studies of paleoclimate simulated by using general circulation models(GCM) of atmosphere in recent years are summarized and reviewed systematically in this paper. First the advantages of numerical simulation method used in paleoclimate research are pointed out. Numerical calculations can quantitatively show the nonlinear relation-ship between climate and various factors influencing it. Results of numerical simulations can fill the gaps of observaation research in both space and time, that is, sometimes GCM can tell us something about atmosphere behaviour that could not be obtained from observations. The most advantage of the method of numerical simulation lies in its altirnative tests or even null experiment that hopefully clarify how and why the atmosphere behaves under certain physical hypothesis. Such experiments are probably impossible to perform in the actual atmosphere. Then main aspects and achievements of paleoclimate simulation for several typical geological periods (the midcretaceous, late cenozoic, last glacial maximum and since then)are introduced. A series of numerical simulations and experiments made by using different GCMs explore actions of various factors to build up paleoelimate, such as the earth's s orbital parameters,trace gases in atmosphere and boundary conditions(sea temperature, locations of continents, altitude of mountains, ice sheets, vegetation and so on). These results are undoubtedly very meaning to study and understand deeply the cause and law of climatic change and even to foreshadow the future of climate. Finally the wider vista of numerical simulatin in the area of paleoclimate research is prospected.
出处
《地理科学》
CSSCI
CSCD
北大核心
1993年第3期257-267,共11页
Scientia Geographica Sinica
基金
中国科学院西安黄土与第四纪地质开放研究实验室的资助下完成的
关键词
数值模拟
古气候
地质证据
Numerical Simulation
Paleoclimate
Geological evidence
