ESA Sea Level Budget Closure Climate Change Initiative (SLBC_cci): Time series of global mean sea level budget and ocean mass budget elements (1993-2016, at monthly resolution), version 2.1

This dataset is a compilation of time series, together with uncertainties, of the following elements of the global mean sea level budget and ocean mass budget: (a) global mean sea level (b) the steric contribution to global mean sea level, that is, the effect of ocean water density change, which is dominated, on a global average, by thermal expansion (c) the mass contribution to global mean sea level (d) the global glaciers contribution (excluding Greenland and Antarctica) (e) the Greenland Ice Sheet and Greenland peripheral glaciers contribution (f) the Antarctic Ice Sheet contribution (g) the contribution from changes in land water storage (including snow cover). The compilation is a result from the Sea-level Budget Closure (SLBC_cci) project conducted in the framework of ESA’s Climate Change Initiative (CCI). It provides assessments of the global mean sea level and ocean mass budgets. Assessment of the global mean sea level budget means to assess how well (a) agrees, within uncertainties, to the sum of (b) and (c) or to the sum of (b), (d), (e), (f) and (g). Assessment of the ocean mass budget means to assess how well (c) agrees to the sum (d), (e), (f) and (g). All time series are expressed in terms of anomalies (in millimetres of equivalent global mean sea level) with respect to the mean value over the 10-year reference period 2006-2015. The temporal resolution is monthly. The temporal range is from January 1993 to December 2016. Some time series do not cover this full temporal range. All time series are complete over the temporal range from January 2003 to August 2016. For some elements, more than one time series are given, as a result of different assessments from different data sources and methods. Data and methods underlying the time series are as follows: (a) satellite altimetry analysis by the Sea Level CCI project. (b) a new analysis of Argo drifter data with incorporation of sea surface temperature data; an alternative time series consists in an ensemble mean over previous global mean steric sea level anomaly time series. (c) analysis of monthly global gravity field solutions from the Gravity Recovery and Climate Experiment (GRACE) satellite gravimetry mission. (d) results from a global glacier model. (e) analysis of satellite radar altimetry over the Greenland Ice Sheet, amended by results from the global glacier model for the Greenland peripheral glaciers; an alternative time series consists of results from GRACE satellite gravimetry. (f) analysis of satellite radar altimetry over the Antarctic Ice Sheet; an alternative time series consists of results from GRACE satellite gravimetry. (g) results from the WaterGAP global hydrological model.

本数据集汇编了全球平均海平面收支与海洋质量收支下述各要素的时间序列及其不确定性：（a）全球平均海平面（b）全球平均海平面的比容贡献（即海水密度变化的影响，全球平均而言主要由热膨胀主导）（c）全球平均海平面的质量贡献（d）全球冰川贡献（不含格陵兰与南极地区）（e）格陵兰冰盖及周边冰川贡献（f）南极冰盖贡献（g）陆地水储量变化（含积雪）的贡献。本汇编成果源自欧洲空间局（ESA）气候变化倡议（CCI）框架下开展的海平面收支闭合（SLBC_cci）项目，可用于评估全球平均海平面收支与海洋质量收支：全球平均海平面收支评估需验证（a）与（b）+（c）之和或（b）+（d）+（e）+（f）+（g）之和在不确定性范围内的匹配度；海洋质量收支评估则需验证（c）与（d）+（e）+（f）+（g）之和的匹配度。所有时间序列均以2006-2015年10年参考期均值为基准，采用异常值表示（单位：等效全球平均海平面毫米）；时间分辨率为月度，时间范围覆盖1993年1月至2016年12月（部分序列未覆盖完整范围，但所有序列在2003年1月至2016年8月期间均完整）。部分要素因数据源与评估方法不同，提供了多组时间序列。各序列的底层数据与方法如下：（a）海平面CCI项目的卫星测高分析结果（b）整合海表温度数据的Argo漂流浮标新分析结果；另有一组替代序列为既往全球平均比容海平面异常时间序列的集合平均（c）重力恢复与气候实验（GRACE）卫星重力任务的月度全球重力场解分析结果（d）全球冰川模型结果（e）格陵兰冰盖卫星雷达测高分析结果（结合全球冰川模型得出的格陵兰周边冰川结果修正）；另有一组替代序列为GRACE卫星重力任务结果（f）南极冰盖卫星雷达测高分析结果；另有一组替代序列为GRACE卫星重力任务结果（g）WaterGAP全球水文模型结果