Daily summaries of stream temperature at sites in Alaska, U.S. Geological Survey (USGS)

Stream temperature is an important parameter to ecology, climate, and hydrology studies in Alaska. The United States Geological Survey (USGS) takes continuous stream temperature measurements at various sites around the state as part of the National Water Information Service (NWIS). Here the daily min, mean, and max temperature data (degrees C) at 116 stations across Alaska are included. Data are provided in site-level files, with an additional file describing site and station information. USGS generated flags indicating suspect data are also included in each site-level data file. The data was downloaded from USGS via the USGS R package ‘dataRetrieval’. Included in this data package is the R script, ‘USGS_StreamTemperature_Data_Download.R’, that was used to download this data. This package can be used to download similar data from the USGS data repository. The R script includes code that will save all data to one master file, split the files by site (as done here), as well as code that will save data by individual site number, if needed.水温是阿拉斯加地区生态学、气候学与水文学研究的重要参数。美国地质调查局（United States Geological Survey, USGS）作为国家水信息服务系统（National Water Information Service, NWIS）的组成部分，在阿拉斯加州内各监测站点开展连续河流水温监测工作。本数据集涵盖了阿拉斯加境内116个监测站点的日最低、日平均与日最高水温数据（单位：摄氏度）。数据以站点级文件形式存储，同时附带一份描述站点与监测站基础信息的辅助文件。每个站点级数据文件中还包含USGS生成的可疑数据标记字段。本数据集通过USGS的R语言包'dataRetrieval'从其数据仓库下载获取。本数据包中附带了用于下载该数据集的R脚本文件'USGS_StreamTemperature_Data_Download.R'。该数据包可用于从USGS数据仓库下载同类相关数据。该R脚本包含多项功能代码：可将所有数据整合保存为一个主文件、按站点拆分文件（即本数据集当前的存储形式），还可根据需求按单个站点编号单独导出数据。