摘要
新仙女木事件(Younger Dryasevent,YD事件)为末次冰消期发生的快速降温事件,作为典型突变气候事件,它一直是国际古气候关注热点,其研究的开展促进和深化了科学界对千年尺度突变气候事件的理解和认识。近年来,随着高分辨率地质记录涌现,YD事件时空差异性日益突出。对比和认识这些区域之间事件细节结构及转型模式异同有助于甄别其相位关系,探讨不同环境快速重组对高、低纬突变气候事件的响应方式,进而验证早期驱动—响应假说,为其动力学机制建立及未来相似边界条件下气候预测提供基本地质证据和理论模型。本文从YD事件区域响应方式入手,通过总结和对比模拟研究及地质记录,对YD事件已有研究存在的争议进行回顾,提出有待加强的研究区域和未来研究方向。
As a prototype of abrupt climate changes, the Younger Dryas （YD） event occurred during the last deglaciation, when the Northern Hemispheric temperatures decreased significantly. This event, a focus of interest in the paleoclimate studies, has promoted the understanding of millennial-scale climate changes. Currently, increasing high-resolution records identified a spatio-temporal heterogeneity for the YD event. Knowledge of the structure and transitional pattern for these spatial expressions helps to determine the phase relationship between them, and further understand how reorganization of regional environments responses to rapid climate changes at the low-and high-latitudes. Thus, the previous hypotheses of trigger-response can be tested to deduce a physical interpretation for the YD and present a basis for climate prediction under the similar boundary conditions. By summarizing and comparing the modeling studies and geologic records, this review focuses on the regional responses and the current debates for YD event, and then presents some areas and directions to be further studied. Increasing high-resolution records identified a spatio-temporal heterogeneity for the Younger Dryas （YD） event. Knowledge of the structure and transitional pattern for these spatial expressions helps to determine the phase relationship between them, and further understand how reorganization of regional environments response to rapid climate changes at the low- and high-latitudes. Thus, the previous hypotheses of trigger-response can be tested to deduce a physical interpretation for the YD and present a basis for climate prediction under the similar boundary conditions.
出处
《地质论评》
CAS
CSCD
北大核心
2012年第2期341-349,共9页
Geological Review
基金
国家自然科学基金(编号41172148)
江苏高校优势学科建设工程资助项目
南京师范大学高层次人才科研启动基金项目(编号2011105XGQ0102)共同资助的成果
关键词
YD事件
精细结构
转型方式
区域差异
the Younger Dryas Event
detailed structure
transitional pattern
regional discrepancy
