FIREX-AQ DC-8 Remotely Sensed Trace Gas Data

FIREXAQ_TraceGas_AircraftRemoteSensing_DC8_Data are remotely sensed trace gas measurements conducted onboard the DC8 aircraft during FIREX-AQ. This product features data collected by the DOAS instrument. Data collection for this product is complete.

Completed during summer 2019, FIREX-AQ utilized a combination of instrumented airplanes, satellites, and ground-based instrumentation. Detailed fire plume sampling was carried out by the NASA DC-8 aircraft, which had a comprehensive instrument payload capable of measuring over 200 trace gas species, as well as aerosol microphysical, optical, and chemical properties. The DC-8 aircraft completed 23 science flights, including 15 flights from Boise, Idaho and 8 flights from Salina, Kansas. NASA’s ER-2 completed 11 flights, partially in support of the FIREX-AQ effort. The ER-2 payload was made up of 8 satellite analog instruments and provided critical fire information, including fire temperature, fire plume heights, and vegetation/soil albedo information. NOAA provided the NOAA-CHEM Twin Otter and the NOAA-MET Twin Otter aircraft to measure chemical processing in the lofted plumes of Western wildfires. The NOAA-CHEM Twin Otter focused on nighttime plume chemistry, from which data is archived at the NASA Atmospheric Science Data Center (ASDC). The NOAA-MET Twin Otter collected measurements of air movements at fire boundaries with the goal of understanding the local weather impacts of fires and the movement patterns of fires. NOAA-MET Twin Otter data will be archived at the ASDC in the future. Additionally, a ground-based station in McCall, Idaho and several mobile laboratories provided in-situ measurements of aerosol microphysical and optical properties, aerosol chemical compositions, and trace gas species.

The Fire Influence on Regional to Global Environments and Air Quality (FIREX-AQ) campaign was a NOAA/NASA interagency intensive study of North American fires to gain an understanding on the integrated impact of the fire emissions on the tropospheric chemistry and composition and to assess the satellite’s capability for detecting fires and estimating fire emissions. The overarching goal of FIREX-AQ was to provide measurements of trace gas and aerosol emissions for wildfires and prescribed fires in great detail, relate them to fuel and fire conditions at the point of emission, characterize the conditions relating to plume rise, and follow plumes downwind to understand chemical transformation and air quality impacts.

FIREX-AQ痕量气体机载遥感DC-8数据集，为火灾对区域至全球环境与空气质量（Fire Influence on Regional to Global Environments and Air Quality, FIREX-AQ）项目期间在DC-8飞机上获取的遥感痕量气体测量数据。该数据集包含差分光学吸收光谱仪（Differential Optical Absorption Spectroscopy, DOAS）采集的数据，其数据采集工作已全部完成。

该项目于2019年夏季开展，综合运用了搭载观测仪器的飞机、卫星以及地面观测设备。美国国家航空航天局（National Aeronautics and Space Administration, NASA）的DC-8飞机负责开展详细的火灾羽流采样工作，其搭载的综合观测载荷可测量超过200种痕量气体，以及气溶胶的微物理、光学与化学特性。DC-8飞机共完成23架次科学飞行，其中15架次从爱达荷州博伊西出发，8架次从堪萨斯州萨利纳出发。美国国家航空航天局的ER-2飞机完成了11架次飞行，部分用于支持FIREX-AQ项目工作。ER-2搭载的观测载荷由8台卫星模拟仪器组成，可提供关键的火灾相关信息，包括火灾温度、火灾羽流高度以及植被/土壤反照率数据。美国国家海洋和大气管理局（National Oceanic and Atmospheric Administration, NOAA）提供了NOAA-CHEM双水獭飞机与NOAA-MET双水獭飞机，用于测量美国西部野火抬升羽流中的化学过程。其中NOAA-CHEM双水獭飞机专注于夜间羽流化学研究，其采集的数据已存档于美国国家航空航天局大气科学数据中心（Atmospheric Science Data Center, ASDC）。NOAA-MET双水獭飞机则负责测量火灾边界处的大气运动，旨在探究火灾对局地天气的影响以及火灾的蔓延模式，其相关数据未来将存档于ASDC。此外，爱达荷州麦考尔市的一座地面站与多台移动实验室可提供气溶胶微物理与光学特性、气溶胶化学成分以及痕量气体的原位测量数据。

火灾对区域至全球环境与空气质量（Fire Influence on Regional to Global Environments and Air Quality, FIREX-AQ）野外观测计划，是美国国家海洋和大气管理局与美国国家航空航天局跨机构联合开展的北美野火密集观测研究，旨在阐明火灾排放对对流层化学与成分的综合影响，并评估卫星探测火灾及估算火灾排放量的能力。该项目的核心目标是详细测量野火与计划火烧的痕量气体和气溶胶排放数据，将其与排放源处的燃料与火灾状况相关联，表征羽流抬升的相关条件，并追踪下风方向的羽流以理解化学转化过程及其对空气质量的影响。