1] Department of Geology and Geophysics, Indian Institute of Technology, Kharagpur - 721 302, India [2].
Sci Rep. 2013 Sep 25;3:2753. doi: 10.1038/srep02753.
Rapid climatic shifts across the last glacial to Holocene transition are pervasive feature of the North Atlantic as well as low latitude proxy archives. Our decadal to centennial scale record of summer monsoon proxy Globigerina bulloides from rapidly accumulating sediments from Hole 723A, Arabian Sea shows two distinct intervals of weak summer monsoon wind coinciding with cold periods within Ållerød inerstadial of the North Atlantic named here as IACP-A1 and IACP-A2 and dated (within dating uncertainties) at 13.5 and 13.3 calibrated kilo years before the present (cal kyr BP), respectively. Spectral analysis of the Globigerina bulloides time series for the segment 13.6-13.1 kyr (Ållerød period) reveals a strong solar 208-year cycle also known as de Vries or Suess cycle, suggesting that the centennial scale variability in Indian summer monsoon winds during the Ållerød inerstadial was driven by changes in the solar irradiance through stratospheric-tropospheric interactions.
末次冰消期至全新世过渡期，北大西洋和低纬代用记录中广泛存在快速气候变化。我们从阿拉伯海 723A 孔位快速堆积的沉积物中获得的夏季季风代用Globigerina bulloides 的年代至百年尺度记录显示，在北大西洋 Ållerød 间冰段内有两个明显的弱夏季季风风期间隔，这里将其命名为 IACP-A1 和 IACP-A2，其年代（在测年不确定范围内）分别为 13.5 和 13.3 个校准千年前（cal kyr BP）。对 Globigerina bulloides 时间序列的 13.6-13.1 kyr（Ållerød 时期）段的谱分析揭示了一个强的太阳 208 年周期，也称为德弗里斯或苏斯周期，这表明在 Ållerød 间冰段，印度夏季季风风的百年尺度变化是由平流层-对流层相互作用引起的太阳辐射变化驱动的。
