Climatically forced organic carbon burial in equatorial Atlantic and Pacific Oceans
Climatically forced organic carbon burial in equatorial Atlantic and Pacific Oceans
复制标题
赤道大西洋和太平洋气候迫使有机碳埋藏
作者：
M. Lyle
在过去的十年里，沉积地球化学家注意到，与更新世冰川有关的气候变化对热带海洋中发现的有机碳埋藏速率产生了显著影响1 -4。特别是，在两个大洋的几个短沉积物岩心中，观察到18 kyr BP冰期最大期的有机碳积累速率是全新世的2 - 5倍（见图1）。在这里，我提出了300 kyr时间序列的有机碳质量积累率从四个沉积物芯，两个分别来自赤道太平洋和大西洋，并表明，全球气候的轨道强迫强烈影响了有机碳埋藏在赤道海洋的速度。
Over the past ten years, sedimentary geochemists have noted that climate changes associated with Pleistocene glaciations have had a pronounced effect on the rate of organic carbon burial found in the tropical oceans1–4. In particular, two to five times higher organic carbon accumulation rates have been observed for the 18 kyr BP glacial maximum than for the Holocene in several short sediment cores from both oceans (see Fig. 1). Here I present 300-kyr time series for organic carbon mass accumulation rate from four sediment cores, two each from the equatorial Pacific and Atlantic, and show that orbital forcing of global climate has strongly affected the rate of organic carbon burial in the equatorial oceans.