Indicator: Air Temperature Change in the Chesapeake Bay Watershed (1901 - 2021)

Access the Indicator Materials: - Analysis & Methods - Data File - Map Service This metric is based on temperature data collected from land-based weather stations and compiled in NOAA’s nClimDiv dataset, which is maintained by the National Centers for Environmental Information. The nClimDiv analysis averages climate data across U.S. climate divisions, and temperature trends are calculated by regressing annual climate division anomalies and converting the slope to a rate of change per century. Note: This Indicator supported progress tracking toward the Monitoring and Assessment Outcome in the original Chesapeake Bay Watershed Agreement, adopted in 2014. The Watershed Agreement and Adapting to Changing Environmental Conditions Outcome were revised in 2025.获取该指标相关材料：- 分析与方法 - 数据文件 - 地图服务 本指标基于从陆地气象站采集、并整合入美国国家海洋和大气管理局（National Oceanic and Atmospheric Administration, NOAA）nClimDiv数据集的气温数据，该数据集由美国国家环境信息中心（National Centers for Environmental Information, NCEI）维护。 nClimDiv的分析方法为对美国各气候分区的气候数据取平均值，随后通过对年度气候分区距平值进行回归分析，将回归斜率转换为百年尺度的变化速率，以此计算气温变化趋势。 注：本指标曾用于支撑2014年通过的《切萨皮克湾流域协定》中“监测与评估成果”目标的进展跟踪工作。该流域协定及“适应不断变化的环境条件”成果框架已于2025年完成修订。