Coral Reef In Situ Product (CRISP): a global compilation of coral reef temperature time series

Abstract. Coral reef ecosystems are increasingly affected by climate-driven marine heatwaves, but the thermal environments experienced by corals at the reef-scale are still not well resolved by satellite-derived sea surface temperature (SST) products. In situ temperature loggers can capture much of this fine-scale variability, including diel temperature ranges, short-term extremes, and depth-dependent structure. However, these datasets are often fragmented across sources, inconsistently formatted, or not readily accessible for synthesis and reuse. To address these gaps, we developed the Coral Reef In Situ Product (CRISP), a global aggregation of temperature time series collected from coral reef environments. At the time of writing, CRISP includes 2,548 logger deployments assembled from a mix of public repositories, peer-reviewed literature, gray literature, and community contributions. Each deployment record is associated with available metadata fields stored in a consistent manner across all loggers. The entire dataset is provided in NetCDF format to support use in common scientific workflows (e.g., MATLAB, Python, R). By bringing together these otherwise fragmented observations, CRISP enables analyses of fine-scale thermal variability across coral reef systems. The dataset adheres to the FAIR data principles by emphasizing findability, accessibility, interoperability, and reusability. CRISP can be used for a variety of scientific applications including coral bleaching research, thermal stress assessment, reef climate monitoring, model validation, and investigations of environmental variability across reef systems.