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首页> 外文期刊>Ocean Dynamics >North Atlantic extratropical and subpolar gyre variability during the last 120 years: a gridded dataset of surface temperature, salinity,and density. Part 1: dataset validation and RMS variability
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North Atlantic extratropical and subpolar gyre variability during the last 120 years: a gridded dataset of surface temperature, salinity,and density. Part 1: dataset validation and RMS variability

机译：在过去的120年中，北大西洋的热带外和副极回旋的变异性：表面温度，盐度和密度的网格化数据集。第1部分：数据集验证和RMS变异性

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摘要

We present a binned annual product (BINS) of sea surface temperature (SST), sea surface salinity (SSS), and sea surface density (SSD) observations for 1896-2015 of the subpolar North Atlantic between 40 degrees N and 70 degrees N, mostly excluding the shelf areas. The product of bin averages over spatial scales on the order of 200 to 500km, reproducing most of the interannual variability in different time series covering at least the last three decades or of the along-track ship monitoring. Comparisons with other SSS and SST gridded products available since 1950 suggest that BINS captures the large decadal to multidecadal variability. Comparison with the HadSST3 SST product since 1896 also indicates that the decadal and multidecadal variability is usually well-reproduced, with small differences in long-term trends or in areas with marginal data coverage in either of the two products. Outside of the Labrador Sea and Greenland margins, interannual variability is rather similar in different seasons. Variability at periods longer than 15years is a large part of the total interannual variability, both for SST and SSS, except possibly in the south-western part of the domain. Variability in SST and SSS increases towards the west, with the contribution of salinity variability to density dominating that of temperature in the western Atlantic, except close to the Gulf Stream and North Atlantic Current in the southwest area. Weaker variability and larger relative temperature contributions to density changes are found in the eastern part of the gyre and south of Iceland.
机译：我们提供了1896-2015年北极北大西洋在40度N和70度N之间的海面温度（SST），海面盐度（SSS）和海面密度（SSD）观测值的分年年产（BINS），大部分不包括货架区域。 Bin的乘积在200至500 km的空间尺度上平均，再现了至少在最近的三十年或沿线船舶监测中不同时间序列中的大多数年际变化。自1950年以来，与其他SSS和SST网格产品的比较表明BINS捕获了大年代际到多年代际的变化。自1896年以来与HadSST3 SST产品的比较还表明，十年和多十年的变异性通常都可以很好地再现，这两种产品中的任何一种在长期趋势或边缘数据覆盖的区域中差异很小。在拉布拉多海和格陵兰边缘以外，不同季节的年际变化非常相似。对于SST和SSS，超过15年的期间的变异性是年度总变异性的很大一部分，但可能在该领域的西南部除外。 SST和SSS的变异性向西增加，盐度变异性对密度的贡献控制着西大西洋的温度，但西南地区靠近墨西哥湾流和北大西洋洋流除外。在回旋的东部和冰岛南部发现较弱的变异性和相对温度对密度变化的较大贡献。

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