New IRSL ages of eolianites close to Muñique (Lanzarote) demonstrate the influence of millennial scale climatic variability on the sedimentary dynamics on the Canary Islands during the last glacial cycle. The repetitive succession of interstadial and stadial climatic conditions formed multiple sequences of eolian deposits, each in general comprising three depositional types. DepoType 1 and DepoType 2 consist mainly of marine biogenic carbonate detritus with small amounts of dust from the Sahara representing interstadial conditions. DepoType 2 compared to DepoType 1 is characterized by larger amounts of land snails and calcified brood cells. A DepoType 3 rich in dust from African subtropical/tropical Latisols terminates a sequence. IRSL dating on DepoType 3 type deposits clearly shows that these were deposited during Heinrich Events under stadial conditions. The stadial cooling of the North Atlantic Ocean caused a southern shift of climate zones that culminated during Heinrich Events when the arctic climate reaches its most southerly extent. As a consequence, atmospheric changes led to massive dust supply from the then-dry Sahel. The increase in dust and precipitation from the dry DepoTypes 1 to the more humid DepoTypes 3 originates from a modified atmospheric dynamic during a millennial cycle.

中文翻译：

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北大西洋海因里希事件期间，加那利岛兰萨罗特岛的萨赫勒尘埃大量沉积

Muñique（兰萨罗特岛）附近风成岩的新 IRSL 年龄证明了千年尺度气候变化对最后一次冰期循环期间加那利群岛沉积动力学的影响。层间和层间气候条件的反复演替形成了多个风成沉积层序，每个层序一般包括三种沉积类型。DepoType 1 和 DepoType 2 主要由海洋生物碳酸盐碎屑和少量来自撒哈拉沙漠的尘埃组成，代表间质条件。与 DepoType 1 相比，DepoType 2 的特点是大量的蜗牛和钙化的育雏细胞。来自非洲亚热带/热带 Latisols 的富含尘埃的 DepoType 3 终止了一个序列。对 DepoType 3 型沉积物的 IRSL 测年清楚地表明，这些沉积物是在海因里希事件期间在静态条件下沉积的。北大西洋的天体变冷导致气候带向南移动，当北极气候达到最南端时，海因里希事件达到顶峰。结果，大气变化导致当时干燥的萨赫勒地区大量尘埃供应。从干燥的 DepoTypes 1 到更潮湿的 DepoTypes 3 的尘埃和降水的增加源于千年周期期间大气动态的改变。