Modeling Mediterranean Ocean climate of the Last Glacial Maximum
Modeling Mediterranean Ocean climate of the Last Glacial Maximum
复制标题
模拟末次盛冰期的地中海气候
DOI：
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发表时间：
2010
期刊：
影响因子：
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通讯作者：
U. Mikolajewicz
中科院分区：
文献类型：
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作者：
U. Mikolajewicz
抽象。利用地中海区域海洋环流模式研究了末次冰盛期的气候。这些模拟的大气强迫来自于大气环流模式的模拟，而大气环流模式又是由粗分辨率地球系统模式的地表条件强迫的。该模型是成功地再现重建的海表面温度异常的一般模式，最强的冷却在地中海西北部和地中海东部的弱冷却在夏季，虽然该模型低估了在地中海西部的夏季冷却的程度。然而，有一个很强的垂直梯度与这种模式的夏季冷却，这使得与重建复杂的比较。与大西洋的交换量大约减少到其现值的一半，其原因是全球海平面降低，直布罗陀海峡变浅。尽管净蒸发量减少，但这种减少的交换导致地中海盐度的强烈增加。
Abstract. A regional ocean general circulation model of the Mediterranean is used to study the climate of the Last Glacial Maximum. The atmospheric forcing for these simulations has been derived from simulations with an atmospheric general circulation model, which in turn was forced with surface conditions from a coarse resolution earth system model. The model is successful in reproducing the general patterns of reconstructed sea surface temperature anomalies with the strongest cooling in summer in the northwestern Mediterranean and weak cooling in the Levantine, although the model underestimates the extent of the summer cooling in the western Mediterranean. However, there is a strong vertical gradient associated with this pattern of summer cooling, which makes the comparison with reconstructions complicated. The exchange with the Atlantic is decreased to roughly one half of its present value, which can be explained by the shallower Strait of Gibraltar as a consequence of lower global sea level. This reduced exchange causes a strong increase of salinity in the Mediterranean in spite of reduced net evaporation.