The Met Office Hadley Centre sea ice and sea surface temperature data set, version 2: 1. Sea ice concentrations
The Met Office Hadley Centre sea ice and sea surface temperature data set, version 2: 1. Sea ice concentrations
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DOI：
10.1002/2013jd020316
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发表时间：
2014-03
期刊：
影响因子：
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通讯作者：
Holly A. Titchner;N. Rayner
中科院分区：
文献类型：
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作者：
Holly A. Titchner;N. Rayner
我们提出了英国气象局哈德利中心海冰和海面温度数据集HadISST.2.1.0.0的海冰浓度分量的新版本。被动微波数据与海冰图等历史资料相结合，在1850年至2007年的1°网格上创建全球分析。当没有关于海冰的信息时，使用气候学。我们的主要目标是通过使用不同数据源之间的重叠周期来计算和应用偏差调整，从而创建一个同质的数据集。国家冰川中心1995年至2007年的图表被用作实现这一目标的参考。特别是，对南极和北极夏季的被动微波数据进行了大偏差调整。总体而言，HadISST.2.1.0.0含冰量大于HadISST1.1，且在某些区域和时期冰浓度更高，边缘冰带更短，范围和面积更大。本文提出并评价了一种利用冰缘距离估算冰原内浓度的新方法。这是在只知道范围或原始浓度场是异质的情况下使用的。HadISST1.1记录中的许多不连续性在HadISST.2.1.0.0中不再存在。
We present a new version of the sea ice concentration component of the Met Office Hadley Centre sea ice and sea surface temperature data set, HadISST.2.1.0.0. Passive microwave data are combined with historical sources, such as sea ice charts, to create global analyses on a 1° grid from 1850 to 2007. Climatology was used when no information about the sea ice was available. Our main aim was to create a homogenous data set by calculating and applying bias adjustments using periods of overlaps between the different data sources used. National Ice Center charts from 1995 to 2007 have been used as a reference to achieve this. In particular, large bias adjustments have been applied to the passive microwave data in both the Antarctic and Arctic summers. Overall, HadISST.2.1.0.0 contains more ice than HadISST1.1, with higher concentrations, shorter marginal ice zones, and larger extents and areas in some regions and periods. A new method for estimating the concentrations within the ice pack using the distance from the ice edge has been developed and evaluated. This was used when only the extents were known or the original concentration fields were heterogeneous. A number of discontinuities in the HadISST1.1 record are no longer found in HadISST.2.1.0.0.