Climate variability across the last deglaciation in NW Iberia and its margin
Climate variability across the last deglaciation in NW Iberia and its margin
复制标题
伊比利亚西北部及其边缘末次冰消期的气候变化
DOI：
10.1016/j.quaint.2015.08.073
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发表时间：
2016
影响因子：
2.2
通讯作者：
F. Abrantes
中科院分区：
文献类型：
--
作者：
F. Naughton;M. F. S. Goñi;T. Rodrigues;E. Salgueiro;S. Costas;S. Desprat;J. Duprat;E. Michel;L. Rossignol;S. Zaragosi;A. Voelker;F. Abrantes
从西北伊比利亚边缘，核心MD 03 -2697，海洋和陆地数据之间的直接比较，使我们能够准确地评估，没有时间上的模糊性，植被对北大西洋气候事件的反应在最后一次冰消期。MD 03 -2697数据与其他海洋和陆地记录从亚速尔群岛延伸到西部（W）法国，伊比利亚及其边缘，西地中海和西北非洲的广大地区的比较揭示了增强冬季北大西洋西风带事件在驱动异质区域气候信号在特定事件的最后一次冰消期间的重要性。Heinrich Stadial 1（HS 1）/Oldest Dryas是一个复杂的事件，在直接受北大西洋影响的地区有三个同步的主要阶段（a：极冷/相对潮湿; B：凉爽/干燥; c：相对温暖/水分供应增加），而在大多数内陆和高海拔地区则以单一阶段（寒冷和干燥）为特征。北大西洋西风带的强度和位置的变化可以解释HS 1期间从西比利牛斯山脉到西地中海的湿度变化。Bølling-Allerød（B-A）事件的特征是与格陵兰温度模式形成对比的西伊比利亚和西比利牛斯山脉从Bølling到Allerød的海洋和大气温度以及降水的同步渐进增加。中高纬度热力对比和大西洋经向翻转环流（AMOC）的逐渐加强，促使西风带和水汽沿着持续增强，最后，新仙女木（YD）阶段表现为海陆同步的冷回流（但不像HS 1那么冷），尽管在此期间持续干燥，极端冬季降水的发生可能影响了西伊比利亚和比利牛斯北部和中部的大部分沿海地区。相比之下，地中海西部地区在青年节期间持续干旱。西风带进一步向北迁移的位移后，极锋在冰消期排除输入的水分在西地中海地区，这持续非常干燥的YD体育场。
The direct comparison between marine and terrestrial data from the NW Iberian margin, core MD03-2697, allows us to accurately evaluate, without chronological ambiguity, the vegetation response to North Atlantic climate events across the last deglaciation. Comparison of MD03-2697 data with other marine and terrestrial records from a vast area stretching from the Azores to western (W) France, Iberia and its margin, the W Mediterranean and NW Africa reveals the importance of enhanced winter North Atlantic westerlies episodes in driving a heterogeneous regional climatic signal during particular events of the last deglaciation. Heinrich Stadial 1 (HS1)/Oldest Dryas is a complex event marked by three synchronous main phases (a: extremely cold/relatively wet; b: cool/dry; c: relatively warmer/increasing moisture availability) in regions directly influenced by the North Atlantic while it is characterized by a single phase (cold and dry) in most inland and high altitude areas. Changes in the strength and position of North Atlantic westerlies could explain the variability in moisture during HS1 from W Pyrenees to W Mediterranean. The Bølling-Allerød (B-A) event is marked by a synchronous progressive increase of ocean and atmospheric temperatures and precipitation from the Bølling to the Allerød in W Iberia and W Pyrenees contrasting with the Greenland temperature pattern. Mid-to high latitudes thermal contrast and the gradual strengthening of the Atlantic Meridional Overturning Circulation (AMOC) triggered the continuing enhancement of westerlies, and moisture, along this period.Finally, the Younger Dryas (YD) Stadial is characterized by a land-ocean synchronous returning cold conditions (but not so cold as HS1) and, although dry conditions persisted during this period, extreme winter precipitation occurrences might have affected the most coastal areas of north and central W Iberia and Pyrenees. In contrast, dry conditions persisted during the YD in the western Mediterranean regions. The westerlies migrated further north following the displacement of the Polar Front during the deglaciation precluding the input of moisture in the W Mediterranean region, which persisted very dry during the YD Stadial.
Heinrich Stadial 1 期间的萨赫勒特大干旱：西非低层和中层风系统三相演化的证据
影响因子：
4
作者：
Bouimetarhan;M. Prange;E. Schefuß;L. Dupont;J. Lippold;S. Mulitza;K. Zonneveld
通讯作者：
K. Zonneveld
影响因子：
2.3
作者：
Fletcher, William J.;Goni, Maria Fernanda Sanchez
通讯作者：
Goni, Maria Fernanda Sanchez