...
首页> 外文期刊>Journal of quaternary science: JQS >A shift towards wetter and windier conditions in southern Sweden around the prominent solar minimum 2750 cal a BP
【24h】

A shift towards wetter and windier conditions in southern Sweden around the prominent solar minimum 2750 cal a BP

机译:围绕着最低的2750 cal BP突出的太阳最低点,在瑞典南部转向潮湿多风的条件

获取原文
获取原文并翻译 | 示例
           

摘要

A variety of palaeoclimatic records show a shift towards cooler, wetter and windier conditions in Europe around 2800 cal a BP. The shift broadly coincides with an increase of the atmospheric C-14 concentration, suggesting a connection between solar activity variations and climate change. Here we investigate a peat record from Undarsmosse in southern Sweden. In a previous study, based on a low-resolution chronology, this record showed increased aeolian sand influx and Sphagnum spore content around 2800 cal a BP, indicating high storm activity and wetter conditions. We applied the C-14 wiggle-match dating technique on the same record to construct a robust chronology to evaluate the temporal relationship to solar forcing. In addition, we performed plant macrofossil analysis to determine local vegetation changes. Based on the new chronology, a shift to a Sphagnum-dominated bog, representing wetter conditions, and the onset of a period with increased storminess occurred around 2700 cal a BP. These changes are, within age model uncertainties, synchronous with climatic changes inferred from other sites in Europe, suggesting a shift in the larger scale atmospheric circulation, possibly triggered by decreased solar activity.
机译:各种各样的古气候记录表明,在大约BP 2800 cal的欧洲,气候向凉爽,潮湿和多风的方向转变。这种变化大致与大气中C-14浓度的增加相吻合,表明太阳活动变化与气候变化之间存在联系。在这里,我们调查了瑞典南部Undarsmosse的泥炭记录。在以前的研究中,基于低分辨率的年代学,该记录表明在2800 cal a BP附近风沙流入和泥炭孢子含量增加,表明风暴活动活跃和潮湿的条件。我们在同一记录上应用了C-14摆动匹配测年技术,以构建可靠的年表,以评估与太阳强迫的时间关系。此外,我们进行了植物化石分析以确定局部植被变化。根据新的年代顺序,在2700 cal BP附近发生了一个以泥炭为主的沼泽,这代表了潮湿的条件,并且开始了暴风雨增加的时期。在年龄模型的不确定性范围内,这些变化与从欧洲其他地点推断出的气候变化同步,表明更大规模的大气环流发生了转变,这可能是由于太阳活动减少所致。

著录项

相似文献

  • 外文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号