2,000-year-long temperature and hydrology reconstructions from the Indo-Pacific warm pool
2,000-year-long temperature and hydrology reconstructions from the Indo-Pacific warm pool
复制标题
DOI：
10.1038/nature08233
复制
发表时间：
2009-08-27
期刊：
影响因子：
64.8
通讯作者：
Linsley, Braddock K.
中科院分区：
文献类型：
--
作者：
Oppo, Delia W.;Rosenthal, Yair;Linsley, Braddock K.
对北方地表温度的重建表明，世纪末比过去500年中的任何时候都要温暖，也可能比过去1,300年中的任何时候都要温暖（参考文献1、2）。这些温度重建主要基于热带外或高海拔地区的陆地记录;然而，全球平均表面温度变化密切跟随全球热带地区的变化，其中75%是海洋。特别是，热带印度洋-太平洋暖池（IPWP）代表了一个主要的热库，它既影响全球大气环流（4），又对遥远的北方高纬度强迫（5，6）作出反应。在这里，我们提出了一个十年解决的连续海表面温度（SST）重建IPWP跨越过去两千年，重叠的仪器记录，使代理数据的仪器记录的直接比较和二十世纪趋势的背景下，过去的变化进行评估。我们在印度尼西亚马卡萨尔海峡的记录显示出与最近北方温度重建相似的趋势（2）。然而，重建的SST在公元1000年至公元1250年的现代值误差范围内，接近中世纪温暖期的结束。小冰期（大约公元1550 - 1850年）的SST是可变的，在最冷的时间间隔内比现代值低0.5至1摄氏度。一个同伴重建的三角洲O-18的海水-海面盐度和水文指标-表明与东亚季风系统和远程控制的IPWP水文百年千年的时间尺度上的紧密耦合，而不是当地SST变化的主导影响。
Northern Hemisphere surface temperature reconstructions suggest that the late twentieth century was warmer than any other time during the past 500 years and possibly any time during the past 1,300 years (refs 1, 2). These temperature reconstructions are based largely on terrestrial records from extra-tropical or high-elevation sites; however, global average surface temperature changes closely follow those of the global tropics(3), which are 75% ocean. In particular, the tropical Indo-Pacific warm pool (IPWP) represents a major heat reservoir that both influences global atmospheric circulation(4) and responds to remote northern high-latitude forcings(5,6). Here we present a decadally resolved continuous sea surface temperature (SST) reconstruction from the IPWP that spans the past two millennia and overlaps the instrumental record, enabling both a direct comparison of proxy data to the instrumental record and an evaluation of past changes in the context of twentieth century trends. Our record from the Makassar Strait, Indonesia, exhibits trends that are similar to a recent Northern Hemisphere temperature reconstruction(2). Reconstructed SST was, however, within error of modern values from about AD 1000 to AD 1250, towards the end of the Medieval Warm Period. SSTs during the Little Ice Age ( approximately AD 1550-1850) were variable, and similar to 0.5 to 1 degrees C colder than modern values during the coldest intervals. A companion reconstruction of delta O-18 of sea water-a sea surface salinity and hydrology indicator-indicates a tight coupling with the East Asian monsoon system and remote control of IPWP hydrology on centennial-millennial timescales, rather than a dominant influence from local SST variation.