NOAA/WDS Paleoclimatology - Merged Land-Ocean Surface Temperature Analysis (MLOST v3b)

Observations of sea surface and land–near-surface merged temperature anomalies are used to monitor climate variations and to evaluate climate simulations; therefore, it is important to make analyses of these data as accurate as possible. Analysis uncertainty occurs because of data errors and incomplete sampling over the historical period. This manuscript documents recent improvements in NOAA’s merged global surface temperature anomaly analysis, monthly, in spatial 5° grid boxes. These improvements allow better analysis of temperatures throughout the record, with the greatest improvements in the late nineteenth century and since 1985. Improvements in the late nineteenth century are due to improved tuning of the analysis methods. Beginning in 1985, improvements are due to the inclusion of bias-adjusted satellite data. The old analysis (version 2) was documented in 2005, and this improved analysis is called version 3.海洋表面与近陆地表面融合温度距平观测数据被用于监测气候变化与评估气候模拟结果，因此尽可能提升此类数据的分析精度至关重要。历史时期内的数据误差与采样不完整会引发分析不确定性。本文详述了美国国家海洋和大气管理局（NOAA）全球地表温度距平融合分析的最新改进方案，该分析以5°空间网格为单元，输出逐月分析结果。这些改进使得整段历史温度序列的分析精度得到显著提升，其中以19世纪末期及1985年以来的改进效果最为突出。19世纪末期的精度改进源于分析方法调优工作的优化。1985年以来的精度提升则得益于引入了经过偏差校正的卫星观测数据。旧版分析（版本2）已于2005年完成文档撰写，本次改进后的分析版本为版本3。

搜集汇总

背景与挑战

背景概述

该数据集是NOAA发布的全球表面温度异常分析月度数据，空间分辨率为5°网格，用于监测气候变化和评估气候模拟。数据集版本为v3b，相较于旧版本（v2）在19世纪末和1985年后有显著改进：19世纪末通过方法优化提升精度，1985年后则因纳入偏差调整的卫星数据而增强准确性。