Historical CO2 Records from the Law Dome DE08, DE08-2, and DSS Ice Cores (1006 A.D.-1978 A.D)

The CO2 records presented here are derived from three ice cores obtained at Law Dome, East Antarctica from 1987 to 1993. The Law Dome site satisfies many of the desirable characteristics of an ideal ice core site for atmospheric CO2 reconstructions including negligible melting of the ice sheet surface, low concentrations of impurities, regular stratigraphic layering undisturbed at the surface by wind or at depth by ice flow, and high snow accumulation rate. Further details on the site, drilling, and cores are provided in Etheridge et al. (1996), Etheridge and Wookey (1989), and Morgan et al (1997).

本研究呈现的二氧化碳（CO₂）记录，源自1987年至1993年间在东南极洲劳穹丘（Law Dome）钻取的3根冰芯。劳穹丘采样点具备用于重建大气二氧化碳记录的理想冰芯采样点的多项优良特性：冰盖表面消融可忽略不计、杂质浓度极低、地层序列规则且表层未受风力扰动、深部未受冰流干扰，同时积雪积累速率较高。关于该采样点、钻探流程及冰芯的更多细节，可参见Etheridge等人（1996）、Etheridge与Wookey（1989）以及Morgan等人（1997）的研究文献。