Post-glacial regional climate variability along the East Antarctic coastal margin - evidence from shallow marine and coastal terrestrial records
Post-glacial regional climate variability along the East Antarctic coastal margin - evidence from shallow marine and coastal terrestrial records
复制标题
DOI：
10.1016/j.earscirev.2010.10.006
复制
发表时间：
2011-02
影响因子：
12.1
通讯作者：
E. Verleyen;D. Hodgson;K. Sabbe;H. Cremer;S. Emslie;J. A. Gibson;B. Hall;S. Imura;S. Kudoh;G. Marshall;A. McMinn;M. Melles;Louise Newman;D. Roberts;Stephen Roberts;Shiv M Singh;M. Sterken;I. Tavernier;S. Verkulich;E. V. D. Vyver;W. V. Nieuwenhuyze;B. Wagner;W. Vyverman
中科院分区：
文献类型：
--
作者：
E. Verleyen;D. Hodgson;K. Sabbe;H. Cremer;S. Emslie;J. A. Gibson;B. Hall;S. Imura;S. Kudoh;G. Marshall;A. McMinn;M. Melles;Louise Newman;D. Roberts;Stephen Roberts;Shiv M Singh;M. Sterken;I. Tavernier;S. Verkulich;E. V. D. Vyver;W. V. Nieuwenhuyze;B. Wagner;W. Vyverman
我们回顾了冰后期气候变化沿着东南极海岸线使用陆地和浅海地质记录，并比较这些重建与其他地方的数据。几乎所有的东南极记录都显示了一个近同步的早全新世气候最佳期（11.5- 9 kaBP），与目前无冰地区的冰川消退和南极冰和海洋沉积物岩心记录的最佳期相一致。全新世早期温暖期之后，浅层海洋和沿海陆地气候异常似乎不同步，并显示出复杂的区域模式，但陆地记录中总体呈变冷趋势。中晚全新世温暖期存在于许多东南极湖泊和浅海岸海洋记录。虽然有一些差异，在区域的时间这个温暖的时期，它通常发生在4.7和1 ka BP之间的某个地方，与南极半岛陆地记录中发现的类似的最佳重叠。在不同的记录和地区，这些有时突然的温暖事件的时间差异指向了一些我们尚未确定的机制。几乎所有的记录都表明，从2ka BP开始，新冰期开始变冷。没有证据表明沿着东南极海岸线有一个相当于北方半球中世纪温暖期的时期，只有少数地方有微弱的间接证据表明有一个与北方半球小冰期大致相当的凉爽事件。需要在东南极洲沿海地区，特别是在Terre Adélie、德龙宁毛德地和恩德比地获得日期准确、分辨率高的气候记录，以充分了解区域气候异常、海洋和陆地记录之间的差异，并确定目前在南极洲测量的不均匀温度趋势的意义。
We review the post-glacial climate variability along the East Antarctic coastline using terrestrial and shallow marine geological records and compare these reconstructions with data from elsewhere. Nearly all East Antarctic records show a near-synchronous Early Holocene climate optimum (11.5–9ka BP), coinciding with the deglaciation of currently ice-free regions and the optimum recorded in Antarctic ice and marine sediment cores. Shallow marine and coastal terrestrial climate anomalies appear to be out of phase after the Early Holocene warm period, and show complex regional patterns, but an overall trend of cooling in the terrestrial records. A Mid to Late Holocene warm period is present in many East Antarctic lake and shallow coastal marine records. Although there are some differences in the regional timing of this warm period, it typically occurs somewhere between 4.7 and 1ka BP, which overlaps with a similar optimum found in Antarctic Peninsula terrestrial records. The differences in the timing of these sometimes abrupt warm events in different records and regions points to a number of mechanisms that we have yet to identify. Nearly all records show a neoglacial cooling from 2ka BP onwards. There is no evidence along the East Antarctic coastline for an equivalent to the Northern Hemisphere Medieval Warm Period and there is only weak circumstantial evidence in a few places for a cool event crudely equivalent in time to the Northern Hemisphere's Little Ice Age. There is a need for well-dated, high resolution climate records in coastal East Antarctica and particularly in Terre Adélie, Dronning Maud Land and Enderby Land to fully understand the regional climate anomalies, the disparity between marine and terrestrial records, and to determine the significance of the heterogeneous temperature trends being measured in the Antarctic today.