Glacial Ocean Map (GLOMAP)@en

We present a climatology of the near-sea-surface temperature (NSST) anomaly and the sea-ice extent during the Last Glacial Maximum (LGM, 23,000-19,000 years before present) mapped on a global regular 1°×1° grid. This is an extension of the Glacial Atlantic Ocean Mapping (GLAMAP) reconstruction of the Atlantic SST based on the results of the Multiproxy Approach for the Reconstruction of the Glacial Ocean Surface (MARGO) project and several recent estimates of the LGM sea-ice extent. The gridding of the sparse SST reconstruction was done in an optimal way using the Data-Interpolating Variational Analysis (DIVA) software, which takes into account the uncertainty on the reconstruction and includes the calculation of an error field. The climatology is provided as a Network Common Data Format (netCDF) file.

本数据集提供了末次冰盛期（Last Glacial Maximum，LGM，距今23000至19000年）的近海面温度（near-sea-surface temperature，NSST）异常与海冰范围的气候学场数据，其空间分布被映射至全球规则1°×1°网格之上。本数据集是基于冰期洋面重建多代用指标方法（Multiproxy Approach for the Reconstruction of the Glacial Ocean Surface，MARGO）项目的研究成果，以及近年多项末次冰盛期海冰范围估算结果，对冰期大西洋洋区制图（Glacial Atlantic Ocean Mapping，GLAMAP）所开展的大西洋海表温度重建工作的拓展。针对稀疏分布的海表温度重建数据，本研究采用数据插值变分分析（Data-Interpolating Variational Analysis，DIVA）软件进行最优网格化处理，该方法可兼顾重建结果的不确定性，并同步计算误差场。本气候学数据集以网络通用数据格式（Network Common Data Format，netCDF）文件形式提供。