Terrestrial Condition Assessment (TCA) Alaska Climate Exposure Temperature (Image Service)

Direct Download (Raster Data Gateway) Objective: Characterize climate departures for the most recent 5 years as compared with the historical record, identifying locations where recent conditions indicate a significant change from the historical baseline. Data: Gridded coverages based on DAYMET climate data were used to calculate departure of mean temperature in winter (Dec. – Feb.), spring (Mar. – May), summer (Jun. – Aug.), and fall (Sep. – Nov.) for the recent 5-year period as compared with previous years in the historical record. Data were summarized at the Subsection scale of the USFS National Hierarchy of Ecological Units and applied to the corresponding landscape (LTA). There is a one-year lag between the most recent available DAYMET data and the TCA Assessment year, for example, the 2024 TCA Assessment used 2019-2023 data for the most recent time period, and 1980-2018 data for the historical baseline. Data Format: Raster data are continuous; Units: Fahrenheit Spatial Resolution: 1000m (1km) Source data: DAYMET Additional Resources: Details on Method Changes and Source Data Versions Overview of the Terrestrial Condition Assessment: TCA Hubsite or Landfire Office Hour Presentation Explore the results of the most recent assessment: TCA Interactive Data Viewer Learn more about the TCA KPI: TCA Dashboard *if you have trouble viewing the Dashboard, please submit a Tableau Viewer Access Request直接下载（栅格数据网关） 目标：对比历史记录，刻画最近5年的气候偏离特征，识别出近期气候条件与历史基准存在显著变化的区域。 数据：采用基于DAYMET气候数据构建的网格化覆盖数据集，计算最近5年冬季（12月—次年2月）、春季（3月—5月）、夏季（6月—8月）、秋季（9月—11月）的平均气温与历史记录中对应时段的气温偏离值。数据以美国林务局（USFS）生态单元国家层级分类体系中的亚区（Subsection）尺度进行汇总，并应用于对应的景观单元（LTA）。当前可获取的最新DAYMET数据与陆地状况评估（Terrestrial Condition Assessment, TCA）的评估年度存在1年的滞后：例如2024年TCA评估采用2019—2023年数据作为近期时段，以1980—2018年数据作为历史基准。 数据格式：栅格数据为连续型数据；单位：华氏度；空间分辨率：1000米（1千米）；源数据：DAYMET 附加资源：方法变更与源数据版本详情、陆地状况评估（Terrestrial Condition Assessment, TCA）概述可通过TCA枢纽站点（TCA Hubsite）或Landfire线上办公时段演示（Landfire Office Hour Presentation）查阅。浏览最新评估结果可使用TCA交互式数据查看器（TCA Interactive Data Viewer）。了解更多TCA关键绩效指标（KPI）相关信息，请访问TCA仪表板（TCA Dashboard）。*若无法正常查看仪表板，请提交Tableau查看器访问申请。