Airborne thermal infrared remote sensing of summer water temperature in the Middle Fork John Day River (Oregon) in 1994-2003

This data release combines seven airborne thermal infrared (TIR) remote sensing data sets of stream temperature collected along the mainstem of the Middle Fork John Day River (MFJD) in Oregon from 1994 to 2003. Years 1994, 1995, 1996, 1998, and 2002 have single datasets. Year 2003 has two data sets. Most of the TIR data covered the upstream half of the MFJD mainstem between river km 50 and 110, while the 2002 profile covers the lower half starting at the confluence of the MFJD with the North Fork John Day River through river kilometer 64. All TIR data sets were collected by helicopter in an upstream direction in August with the intent of capturing data at or near the maximum summer daily stream temperature. Ground-truthing and calibration of the TIR remote sensing surveys were conducted with continuous in-stream temperature loggers deployed longitudinally throughout the survey area. TIR imagery of the main stem and tributary junctions was processed, sampled, and summarized in "temperature profiles" that extend longitudinally along the mainstem MFJD for each data set and are composed of individual temperature observations along that longitudinal transect.

本数据集合集整合了1994年至2003年间，于美国俄勒冈州约翰·戴河中游干流（Middle Fork John Day River, MFJD）沿线采集的7组河流水温机载热红外（TIR）遥感数据集。其中1994、1995、1996、1998及2002年均仅包含单份数据集，2003年则包含两份数据集。绝大多数TIR数据集覆盖了MFJD干流上游段（河流公里标50至110区间），而2002年的测线覆盖下游段，范围从MFJD与北约翰·戴河的汇流点起，至河流公里标64处。所有TIR数据集均于8月由直升机沿河道上游方向采集，旨在获取夏季单日河流水温峰值或接近峰值时段的观测数据。本次TIR遥感调查的地面验证与校准工作，通过在调查区域内沿纵向布设的连续式河道内温度记录仪完成。针对干流及支流汇口的TIR影像已完成处理、采样与汇总，形成每份数据集对应的沿MFJD干流纵向延伸的“水温剖面”，该剖面由该纵向断面上的单条水温观测值组成。