Absolute Change in Annual Precipitation (Alaska) (Image Service)

<div style='text-align:Left;'><div><div><p><span>The National Forest Climate Change Maps project was developed to meet the need of National Forest managers for information on projected climate changes at a scale relevant to decision making processes, including Forest Plans. The maps use state-of-the-art science and are available for every National Forest in the contiguous United States with relevant data coverage. Currently, the map sets include variables related to precipitation and air temperature, including both Alaskan and lower 48 datasets. Data from the lower 48 were downloaded from here: https://www.fs.usda.gov/rm/boise/AWAE/projects/national-forest-climate-change-maps.html, and Alaskan data came from here: https://www.snap.uaf.edu/tools/data-downloads. Historical data are compared with RCP 8.5 projections from the 2080s.</span></p><p><span>A Raster Function Template is available in this service that will classify the data as originally intended by OSC. The RFT currently works in AGOL but not in ArcGIS Pro.</span></p></div></div></div>

国家森林气候变化地图项目旨在满足美国国家森林管理人员对适配决策流程（包括森林规划）尺度的预估气候变化信息的需求。本地图集采用前沿科学方法制作，可覆盖所有具备相关数据覆盖范围的美国本土国家森林。目前，该数据集集合包含与降水、气温相关的变量，涵盖阿拉斯加及美国本土48州的数据集。美国本土48州的数据集下载自：https://www.fs.usda.gov/rm/boise/AWAE/projects/national-forest-climate-change-maps.html，阿拉斯加数据集则来源于：https://www.snap.uaf.edu/tools/data-downloads。历史数据与2080年代的代表性浓度路径8.5（Representative Concentration Pathway 8.5，RCP 8.5）预估结果进行了对比。
本服务提供一款栅格函数模板（Raster Function Template），可按照OSC的原始设计意图对数据进行分类。目前该模板可在ArcGIS Online（AGOL）中运行，但暂不支持ArcGIS Pro。