Long-term sea surface temperature and climate change in the Australian-New Zealand region
Long-term sea surface temperature and climate change in the Australian-New Zealand region
复制标题
DOI：
10.1029/2006pa001328
复制
发表时间：
2007-05-24
期刊：
影响因子：
--
通讯作者：
Pelejero, Carles
中科院分区：
文献类型：
--
作者：
Barrows, Timothy T.;Juggins, Steve;Pelejero, Carles
[1]我们汇编和比较了过去15万年来南半球中纬度地区四个深海岩心的数据。我们重新计算来自有孔虫的海表温度估计，并将这些与来自有孔虫碳酸盐中的烯酮和镁/钙比值的估计值进行比较，并在一个共同的绝对时间尺度上与相应的沉积学和花粉记录进行比较。利用一叠最高分辨率的记录，我们发现一阶气候变化与北方半球日照变化一致。澳大利亚和新西兰的冰川范围和推断的植被变化与海洋表面温度同步变化，表明海洋和陆地温度之间存在密切联系。在南大洋，在几个世纪内出现了6摄氏度左右的快速温度变化，似乎在中纬度气候变化中发挥了重要作用。海洋表面温度在较长时期内的变化与南极冰芯的代理温度记录非常吻合。暖事件与南极事件A1-A4相关，似乎发生在格陵兰岛的Dansgaard-Oeschger事件8，12，14和17之前。
[1] We compile and compare data for the last 150,000 years from four deep-sea cores in the midlatitude zone of the Southern Hemisphere. We recalculate sea surface temperature estimates derived from foraminifera and compare these with estimates derived from alkenones and magnesium/calcium ratios in foraminiferal carbonate and with accompanying sedimentological and pollen records on a common absolute timescale. Using a stack of the highest-resolution records, we find that first-order climate change occurs in concert with changes in insolation in the Northern Hemisphere. Glacier extent and inferred vegetation changes in Australia and New Zealand vary in tandem with sea surface temperatures, signifying close links between oceanic and terrestrial temperature. In the Southern Ocean, rapid temperature change of the order of 6 degrees C occurs within a few centuries and appears to have played an important role in midlatitude climate change. Sea surface temperature changes over longer periods closely match proxy temperature records from Antarctic ice cores. Warm events correlate with Antarctic events A1-A4 and appear to occur just before Dansgaard-Oeschger events 8, 12, 14, and 17 in Greenland.