Surface temperature in NW Europe during the Younger Dryas: AGCM simulation compared with temperature reconstructions

被引：54

作者：

Renssen H. ^{[1
]}

Isarin R.F.B. ^{[1
]}

机构：

[1] Netherlands Ctr. for Geo-Ecol. Res., Institute of Earth Sciences, Vrije Universiteit Amsterdam, 1081 HV Amsterdam

来源：

Climate Dynamics | 1997年 / 14卷 / 1期

关键词：

Insolation; Cooling Effect; Warm Condition; Maximum Summer; Present Climate;

D O I：

10.1007/s003820050206

中图分类号：

学科分类号：

摘要：

During the Younger Dryas (YD) the climate in NW Europe returned to near-glacial conditions. To improve our understanding of climate variability during this cold interval, we compare an AGCM simulation of this climate, performed with the ECHAM model, with temperature reconstructions for NW Europe based on geological and paleoecological records. Maps for the mean winter, summer and annual temperature are presented. The simulated winters are consistent with reconstructions in the northern part of the study area. A strong deviation is noted in Ireland and England, where the simulation is too warm by at least 10 °C. It appears that the N Atlantic was cooler than prescribed in the YD simulation, including a southward expansion of the sea-ice margin. The comparison for the summer shows a too warm continental Europe in the simulation. Supposedly, these anomalously warm conditions are caused by the AGCM's response to the prescribed increased summer insolation. The region of maximum summer cooling is similar in both the simulation and reconstruction, i.e., S Sweden. We suggest that this is due to the local cooling effect of the Scandinavian ice sheet. Compared to the present climate a considerable increase of the annual temperature range is inferred, especially for regions close to the Atlantic Ocean.

引用

页码：33 / 44

页数：11

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