Centre for Ocean Drilling Science (ODS), Japan Agency for Marine-Earth Science and Technology (JAMSTEC), 3173-25 Showa-machi, Kanazawa-ku, Yokohama, 236-0001 Japan.
Section 5.2: Climate Dynamics and Landscape Evolution, GFZ German Research Centre for Geosciences, Telegrafenberg, 14473 Potsdam, Germany.
Sci Rep. 2017 Mar 31;7:44983. doi: 10.1038/srep44983.
The Younger Dryas Stadial (YDS) was an episode of northern hemispheric cooling which occurred within the Last Glacial Interglacial Transition (LGIT). A major driver for the YDS climate was a weakening of the Atlantic Meridional Overturning Circulation (AMOC). It has been inferred that the AMOC began to strengthen mid-YDS, producing a bipartite structure of the YDS in records from continental Europe. These records imply that the polar front and westerlies shifted northward, producing a warmer second phase of the YDS in Europe. Here we present multi-proxy data from the sediments of Lake Suigetsu (Japan), as evidence that a related bi-partition of the YDS also occurred in East Asia. Besides showing for the first time that the bi-partition was not limited to the North Atlantic/European region, the data also imply a climatic dipole between Europe and East Asia since the cold-warm characteristics are reversed at Lake Suigetsu. We suggest that changes in eastward moisture transport from the North Atlantic are the primary mechanism by which the teleconnection can be explained.
年轻的仙女木期（Younger Dryas Stadial，YDS）是末次冰期-间冰期转换（Last Glacial Interglacial Transition，LGIT）期间北半球冷却的一个阶段。YDS 气候的一个主要驱动因素是大西洋经向翻转环流（Atlantic Meridional Overturning Circulation，AMOC）的减弱。据推断，AMOC 在 YDS 中期开始增强，在来自欧洲大陆的记录中产生了 YDS 的二分结构。这些记录表明极锋和西风带向北移动，在欧洲产生了 YDS 的温暖第二阶段。在这里，我们展示了来自日本琵琶湖沉积物的多代用数据，证明了东亚也发生了类似的 YDS 二分结构。除了首次表明二分结构不仅限于北大西洋/欧洲地区之外，数据还暗示了欧洲和东亚之间的气候偶极子，因为在琵琶湖，冷-暖特征是相反的。我们认为，来自北大西洋的向东水汽输送的变化是解释遥相关的主要机制。
