Oceanographic mechanisms and penguin population increases during the Little Ice Age in the southern Ross Sea, Antarctica
Oceanographic mechanisms and penguin population increases during the Little Ice Age in the southern Ross Sea, Antarctica
复制标题
南极洲罗斯海南部小冰河时期的海洋学机制和企鹅数量增加
DOI：
10.1016/j.epsl.2017.10.027
复制
发表时间：
2018-01-01
影响因子：
5.3
通讯作者：
Wang, Yuhong
中科院分区：
文献类型：
--
作者：
Yang, Lianjiao;Sun, Liguang;Wang, Yuhong
阿德利企鹅是众所周知的气候和环境变化指标。探索过去大规模气候变化如何影响企鹅生态对于了解南大洋生态系统对未来全球变化的反应至关重要。利用南极洲罗斯岛伯德角的鸟类沉积物，我们推断了过去 500 年来罗斯海南部阿德利企鹅种群的相对变化，并观察到小冰河时期（LIA；公元 1500-1850 年）企鹅种群数量的增加。我们使用古代企鹅鸟粪中的镉含量作为海洋上升流的指标，并确定了企鹅动态与大气环流和海洋条件之间的密切联系。在类似于公元 1600-1825 年的寒冷时期，阿蒙森海低压 (ASL) 加深导致风力更强、海洋上升流加剧、罗斯海和麦克默多海峡冰间湖扩大，从而导致食物丰富度和企鹅数量增加。我们提出了一种将南极海洋生态与大气/海洋动力学联系起来的机制，有助于解释和预测南极高纬度生态系统对气候变化的响应。 (C) 2017 Elsevier B.V. 保留所有权利。
The Adelie penguin is a well-known indicator for climate and environmental changes. Exploring how large-scale climate variability affects penguin ecology in the past is essential for understanding the responses of Southern Ocean ecosystems to future global change. Using ornithogenic sediments at Cape Bird, Ross Island, Antarctica, we inferred relative population changes of Adelie penguins in the southern Ross Sea over the past 500 yr, and observed an increase in penguin populations during the Little Ice Age (LIA; 1500-1850 AD). We used cadmium content in ancient penguin guano as a proxy of ocean upwelling and identified a close linkage between penguin dynamics and atmospheric circulation and oceanic conditions. During the cold period of similar to 1600-1825 AD, a deepened Amundsen Sea Low (ASL) led to stronger winds, intensified ocean upwelling, enlarged Ross Sea and McMurdo Sound polynyas, and thus higher food abundance and penguin populations. We propose a mechanism linking Antarctic marine ecology and atmospheric/oceanic dynamics which can help explain and predict responses of Antarctic high latitudes ecosystems to climate change. (C) 2017 Elsevier B.V. All rights reserved.