摘要
湖泊沉积可作为气候和环境变化的信息库，它能提供时间分辨率高达百年至十年的气候变化信息。湖泊沉积能灵敏地反映与地球轨道力变化相关的气候效应，以及在此背景上叠加的非线性气候事件。湖泊沉积与其中的古生物组合、元素同位素组成是古气候环境的重要替代指标，为检验大气动力学气候模型和进一步改进模型。
The relative significance of the 20th century climatic and environmental changes must be assessed from the long term global scale perspective available from a spectrum of proxy histories,including those from lake sediments. Lake sediments are sensitive to palaeoclimatic and palaeoenvironment change and record quantitative information about the processes and forcing factors responsible for producing both abrupt and long term climate variation. Lake sediments also offer the best potential for a comprehensive interhemispheric comparision with a temporal resolution of decades to centuries .In many cases new geochemical proxies (biogenic carbonate, biogenic silica, organic matter indices) are needed to supplement the established use of stable isotope analyses for palaeotemperature and palaeohydrological modeling to understand the past environment conditions and evaluate predicative models of climate.
出处
《地球科学进展》
CAS
CSCD
1999年第4期412-416,共5页
Advances in Earth Science
基金
中国科学院南京地理与湖泊研究所湖泊沉积开放实验室资助
中国博士后科学基金
关键词
湖泊
沉积
气候变化
地球轨道力
古气候
Lake sediment
Isotopic proxy for environment
Climate change
Earth's orbital forcing
Climatic event
