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首页> 外文期刊>Geophysical Research Letters >What causes long-term temporal changes in the South Atlantic?
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What causes long-term temporal changes in the South Atlantic?

机译:是什么导致南大西洋的长期时间变化?

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Two zonal sections at 11 degrees S in the South Atlantic, separated in time by 11 years, provide temperature differences in the deep ocean. The aim of this case study is to check whether intrinsic temperature changes are sufficiently large to identify long-term water mass property variations which could be related to climate change. Potential temperature differences on isobaric surfaces in the deep ocean here reach several tenths of degrees C. They can be caused by vertical (cross-isopycnal) or horizontal (isopycnal) advection and mixing, or by intrinsic water mass changes. The effect of vertical transport is removed by using neutral (density) surfaces. The effect of horizontal transport is determined by using a mixing parameterization for temperature and silica on neutral surfaces. The residual intrinsic temperature changes are, with a few local exceptions, within the range of the +/-0.05 degrees C uncertainty, and the temperature changes can thus be explained by advection and mixing alone. [References: 18]
机译:在南大西洋,南纬11度的两个纬向区在时间上相隔11年,它们提供了深海的温差。本案例研究的目的是检查内部温度变化是否足够大,以识别可能与气候变化有关的长期水质特性变化。在深海的等压面上,潜在的温差达到十分之一摄氏度。它们可能是由于垂直(等渗)或水平(等渗)对流和混合,或者是由固有的水质变化引起的。通过使用中性(密度)表面可以消除垂直传输的影响。通过使用温度和二氧化硅在中性表面上的混合参数设置来确定水平传输的影响。残留的固有温度变化(在少数情况下除外)在+/- 0.05摄氏度的不确定性范围内,因此温度变化可以仅通过对流和混合来解释。 [参考:18]

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