Abstract
The accumulation rate, aerosol flux, and air temperature fluctuation can be determined from the study of ice cores drilled through ice sheets and glaciers. The aerosol which gives climate and environmental information is accumulated on the surface of ice sheet. In order to elucidate the climate and environmental changes, it is necessary to find the changes in concentration, composition, and isotope ratio of impurities in accumulated particles after the deposition on the snow surface. This study revealed that the global climate and environmental changes have occurred on various time scales in the past million years. The characteristics of aerosol particles deposited on the Antarctic ice sheet are investigated. Furthermore, the history of solar activity and associated geomagnetic fields is clarified by analyzing the cosmogenic nuclides in ice cores. An interdisciplinary study on ice cores is also carried out to elucidate the evolution mechanisms of microorganisms in the ice cores.
