Abstract. The response of the hydrological cycle to anthropogenic climate change, especially across the tropical oceans, remains poorly understood due to the scarcity of long instrumental temperature and hydrological records. Massive shallow-water corals are ideally suited to reconstructing past oceanic variability as they are widely distributed across the tropics, rapidly deposit calcium carbonate skeletons that continuously record ambient environmental conditions, and can be sampled at monthly to annual resolution. Climate reconstructions based on corals primarily use the stable oxygen isotope composition (δ18O), which acts as a proxy for sea surface temperature (SST), and the oxygen isotope composition of seawater (δ18Osw), a measure of hydrological variability. Increasingly, coral δ18O time series are paired with time series of strontium-to-calcium ratios (Sr/Ca), a proxy for SST, from the same coral to quantify temperature and δ18Osw variability through time. To increase the utility of such reconstructions, we present the CoralHydro2k database, a compilation of published, peer-reviewed coral Sr/Ca and δ18O records from the Common Era (CE). The database contains 54 paired Sr/Ca–δ18O records and 125 unpaired Sr/Ca or δ18O records, with 88 % of these records providing data coverage from 1800 CE to the present. A quality-controlled set of metadata with standardized vocabulary and units accompanies each record, informing the use of the database. The CoralHydro2k database tracks large-scale temperature and hydrological variability. As such, it is well-suited for investigations of past climate variability, comparisons with climate model simulations including isotope-enabled models, and application in paleodata-assimilation projects. The CoralHydro2k database is available in Linked Paleo Data (LiPD) format with serializations in MATLAB, R, and Python and can be downloaded from the NOAA National Center for Environmental Information's Paleoclimate Data Archive at https://doi.org/10.25921/yp94-v135 (Walter et al., 2022).

中文翻译：

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CoralHydro2k 数据库：一个全球性的、积极策划的珊瑚 δ18O 和 Sr ∕ Ca 共同时代热带海洋水文和温度代理记录的汇编

摘要。由于缺乏长期的仪器温度和水文记录，水文循环对人为气候变化的响应，尤其是热带海洋的响应，仍然知之甚少。大量的浅水珊瑚非常适合重建过去的海洋变率，因为它们广泛分布在热带地区，快速沉积碳酸钙骨架，持续记录周围环境条件，并且可以每月到每年的分辨率进行采样。基于珊瑚的气候重建主要使用稳定的氧同位素组成 (δ18O)，它作为海面温度 (SST) 的代表，以及海水的氧同位素组成 (δ18Osw)，一种水文变化的量度。日益，珊瑚 δ18O 时间序列与锶钙比 (Sr/Ca) 的时间序列配对，后者是 SST 的代表，来自同一珊瑚，以量化温度和 δ18Osw 随时间的变化。为了增加此类重建的实用性，我们提供了 CoralHydro2k 数据库，该数据库汇集了来自共同时代 (CE) 的已发表的、经过同行评审的珊瑚 Sr/Ca 和 δ18O 记录。该数据库包含 54 个成对的 Sr/Ca–δ18O 记录和 125 个未成对的 Sr/Ca 或 δ18O 记录，其中 88% 的记录提供从公元 1800 年到现在的数据覆盖范围。每条记录都附有一组质量受控的元数据，这些元数据具有标准化的词汇和单位，为数据库的使用提供信息。CoralHydro2k 数据库跟踪大规模温度和水文变化。因此，它非常适合调查过去的气候变率，与包括同位素模型在内的气候模型模拟的比较，以及在古数据同化项目中的应用。CoralHydro2k 数据库以链接古数据 (LiPD) 格式提供，并在 MATLAB、R 和 Python 中进行序列化，可以从 NOAA 国家环境信息中心的古气候数据档案下载，网址为 https://doi.org/10.25921/yp94- v135（沃尔特等人，2022 年）。