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首页> 外文期刊>Journal of Geophysical Research, C. Oceans: JGR >Understanding projections of sea level rise in a Hadley Centre coupled climate model
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Understanding projections of sea level rise in a Hadley Centre coupled climate model

机译：了解哈德利中心耦合气候模型中海平面上升的预测

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Sea level changes resulting from CO2-induced climate changes in ocean density and circulation have been investigated in a series of idealised experiments with the Hadley Centre HadCM3 AOGCM. Changes in the mass of the ocean were not included. In the global mean, salinity changes have a negligible effect compared with the thermal expansion of the ocean. Regionally, sea level changes are projected to deviate greatly from the global mean (standard deviation is 40% of the mean). Changes in surface fluxes of heat, freshwater and wind stress are all found to produce significant and distinct regional sea level changes, wind stress changes being the most important and the cause of several pronounced local features, while heat and freshwater flux changes affect large parts of the North Atlantic and Southern Ocean. Regional change is related mainly to density changes, with a relatively small contribution in mid and high latitudes from change in the barotropic circulation. Regional density change has an important contribution from redistribution of ocean heat content. In general, unlike in the global mean, the regional pattern of sea level change due to density change appears to be influenced almost as much by salinity changes as by temperature changes, often in opposition. Such compensation is particularly marked in the North Atlantic, where it is consistent with recent observed changes. We suggest that density compensation is not a property of climate change specifically, but a general behavior of the ocean.
机译：由Hadley中心HadCM3 AOGCM进行的一系列理想化实验已研究了由CO2引起的海洋密度和环流气候变化引起的海平面变化。不包括海洋质量的变化。从总体上看，盐度变化对海洋的热膨胀影响可忽略不计。在区域上，预计海平面变化将大大偏离全球平均值（标准偏差为平均值的40％）。发现热量，淡水和风应力的表面通量的变化都会产生显着且明显的区域海平面变化，风应力变化是最重要的并且是几个明显的局部特征的起因，而热量和淡水通量的变化会影响大部分的海平面变化。北大西洋和南大洋。区域变化主要与密度变化有关，而正中环流变化在中高纬度地区贡献相对较小。区域密度变化对海洋热量含量的重新分配具有重要贡献。通常，与全球平均值不同，密度变化引起的海平面变化的区域模式似乎受盐度变化和温度变化的影响几乎相同，通常是相反的。这种补偿在北大西洋特别明显，与最近观察到的变化一致。我们建议密度补偿不是特定于气候变化的属性，而是海洋的一般行为。

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