DOI: 10.5194/cp-8-1213-2012
Scopus记录号: 2-s2.0-84864188790
论文题名: Tightened constraints on the time-lag between Antarctic temperature and CO2 during the last deglaciation
作者: Pedro J.B. ; Rasmussen S.O. ; Van Ommen T.D.
刊名: Climate of the Past
ISSN: 18149324
出版年: 2012
卷: 8, 期: 4 起始页码: 1213
结束页码: 1221
语种: 英语
Scopus关键词: carbon dioxide
; concentration (composition)
; glacial-interglacial cycle
; ice core
; last deglaciation
; paleoclimate
; paleotemperature
; precision
; Southern Ocean
英文摘要: Antarctic ice cores provide clear evidence of a close coupling between variations in Antarctic temperature and the atmospheric concentration of CO 2 during the glacial/interglacial cycles of at least the past 800-thousand years. Precise information on the relative timing of the temperature and CO2 changes can assist in refining our understanding of the physical processes involved in this coupling. Here, we focus on the last deglaciation, 19 000 to 11 000 yr before present, during which CO2 concentrations increased by ∼80 parts per million by volume and Antarctic temperature increased by ∼10 °C. Utilising a recently developed proxy for regional Antarctic temperature, derived from five near-coastal ice cores and two ice core CO2 records with high dating precision, we show that the increase in CO2 likely lagged the increase in regional Antarctic temperature by less than 400 yr and that even a short lead of CO2 over temperature cannot be excluded. This result, consistent for both CO 2 records, implies a faster coupling between temperature and CO 2 than previous estimates, which had permitted up to millennial-scale lags. © Author(s) 2012. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/49568
Appears in Collections: 气候变化与战略
There are no files associated with this item.
Recommended Citation:
Pedro J.B.,Rasmussen S.O.,Van Ommen T.D.. Tightened constraints on the time-lag between Antarctic temperature and CO2 during the last deglaciation[J]. Climate of the Past,2012-01-01,8(4)