Marine Heatwave Event Maps in the Baltic Sea (1982–2023): A Gridded Dataset from Satellite-Derived L4 SST Reprocessed Observations

This dataset provides a comprehensive record of marine heatwave (MHW) events over a 42-year period (1982–2023) based on daily satellite reprocessed observations with a 0.02° × 0.02° spatial resolution. It includes key event-based metrics such as mean intensity, duration, maximum area, and an event index, aiding in the analysis of seasonal and interannual variability in MHW occurrence.The dataset consists of:189 MHW events stored in a NetCDF file.A supplementary file containing the climatology and the 90th percentile of climatology.An Excel file listing the start and end dates of each event.This dataset is valuable for understanding marine heatwave dynamics and can be used in climate studies, ocean modeling, and environmental impact assessments.

本数据集基于1982—2023年共计42年的每日卫星再处理观测数据，以0.02°×0.02°的空间分辨率，完整记录了该时段内的海洋热浪（marine heatwave, MHW）事件。数据集包含基于事件的关键指标，如平均强度、持续时长、最大影响面积及事件索引，可支撑海洋热浪发生的季节与年际变率分析。本数据集由以下部分组成：1. 存储于NetCDF格式文件中的189个海洋热浪事件；2. 包含气候态数据及气候态90百分位值的补充文件；3. 列明各事件起止日期的Excel文件。本数据集对于解析海洋热浪的动力学机制具有重要学术价值，可应用于气候研究、海洋模拟及环境影响评估等相关研究方向。