Magnitude and timing of temperature change in the Indo-Pacific warm pool during deglaciation

Katherine Visser; Robert Thunell; Lowell Stott

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Magnitude and timing of temperature change in the Indo-Pacific warm pool during deglaciation

机译：冰川消融过程中印度洋-太平洋暖池温度变化的幅度和时间

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Ocean-atmosphere interactions in the tropical Pacific region have a strong influence on global heat and water vapour transport and thus constitute an important component of the climate system. Changes in sea surface temperatures and convection in the tropical Indo-Pacific region are thought to be responsible for the interannual to decadal climate variability observed in extra-tropical regions, but the role of the tropics in climate changes on millennial and orbital timescales is less clear. Here we analyse oxygen isotopes and Mg/Ca ratios of foraminiferal shells from the Makassar strait in the heart of the Indo-Pacific warm pool, to obtain synchronous estimates of sea surface temperatures and ice volume. We find that sea surface temperatures increased by 3.5-4.0℃ during the last two glacial―interglacial transitions, synchronous with the global increase in atmospheric CO_2 and Antarctic warming, but the temperature increase occurred 2,000-3,000 years before the Northern Hemisphere ice sheets melted. Our observations suggest that the tropical Pacific region plays an important role in driving glacial―interglacial cycles, possibly through a system similar to how El Nino/Southern Oscillation regulates the poleward flux of heat and water vapour.

机译：热带太平洋区域的海洋与大气相互作用对全球热量和水蒸气的输送有很大影响，因此构成了气候系统的重要组成部分。热带印度洋-太平洋区域的海表温度和对流变化被认为是造成在温带地区观测到的年际至年代际气候变化的原因，但热带在千禧年和轨道时间尺度上在气候变化中的作用尚不清楚。在这里，我们分析了印度太平洋太平洋暖池心脏地带望加锡海峡的有孔虫壳的氧同位素和Mg / Ca比值，以获得海面温度和冰量的同步估计。我们发现，在最近的两次冰—冰间转变期间，海面温度升高了3.5-4.0℃，与全球大气CO_2和南极变暖的总体趋势同步，但温度升高发生在北半球冰盖融化之前的2,000-3,000年。我们的观察结果表明，热带太平洋地区可能通过类似于厄尔尼诺现象/南方涛动调节热量和水蒸气的极向通量的系统，在驱动冰川-冰川间周期中发挥重要作用。

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《Nature》 |2003年第6919期|p.152-155|共4页
作者
Katherine Visser; Robert Thunell; Lowell Stott;
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作者单位

Department of Geological Sciences, University of South Carolina, Columbia, South Carolina 29205, USA;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
原文格式 PDF
正文语种 eng
中图分类自然科学总论;
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6. Indo-Pacific Warm Pool Area Expansion Modoki Activity and Tropical Cold-Point Tropopause Temperature Variations [O] . Fei Xie, Jianping Li, Wenshou Tian, -1

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7. Magnitude and timing of temperature change in the Indo-Pacific warm pool during deglaciation [O] . Visser K, Thunell R, Stott L 2003

机译：magnitude and timing of temperature change in the Indo-pacific warm pool during deglaciation

Magnitude and timing of temperature change in the Indo-Pacific warm pool during deglaciation

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