ACT-America: L2 In Situ Atmospheric CO2, CO, CH4, and O3 Concentrations, Eastern USA

This dataset provides atmospheric carbon dioxide (CO2), carbon monoxide (CO), methane (CH4), water vapor (H2O), and ozone (O3) concentrations collected during airborne campaigns conducted by the Atmospheric Carbon and Transport-America (ACT-America) project. ACT-America's mission spanned 4 years and included five 6-week airborne campaigns covering all 4 seasons and 3 regions of the central and eastern United States. This dataset provides results from all five campaigns, including Summer 2016, Winter 2017, Fall 2017, Spring 2018, and Summer 2019. Two instrumented aircraft platforms, the NASA Langley Beechcraft B200 King Air and the NASA Goddard Space Flight Center's C-130H Hercules, were used to collect high-quality in situ measurements across a variety of continental surfaces and atmospheric conditions. CO2, CO, CH4, and H2O were collected with an infrared cavity ring-down spectrometer system (CRDS; Picarro Inc.). Ozone data were collected with a dual beam differential UV absorption ozone monitor (Model 205; 2B Technologies). Both aircraft hosted identical arrays of in situ sensors. Complete aircraft flight information including, but not limited to, latitude, longitude, altitude, and meteorological conditions are also provided.

本数据集收录了大气碳二氧化物（CO2）、一氧化碳（CO）、甲烷（CH4）、水蒸气（H2O）和臭氧（O3）的浓度数据，这些数据是在大气碳与传输美洲（ACT-America）项目所进行的空中考察期间收集的。ACT-America项目的使命持续了四年，包括五个为期六周的空中考察，覆盖了美国中东部所有四个季节和三个地区的气候。本数据集提供了所有五次考察的结果，包括2016年夏季、2017年冬季、2017年秋季、2018年春季和2019年夏季。在收集高精度原位测量数据的过程中，使用了两种装备的飞机平台：NASA兰利研究中心的Beechcraft B200 King Air和NASA戈达德太空飞行中心的C-130H大力神。CO2、CO、CH4和H2O的收集采用了红外腔衰荡光谱仪系统（CRDS；Picarro Inc.）。臭氧数据则通过双光束差分紫外吸收臭氧监测仪（型号205；2B Technologies）收集。两架飞机均配备了相同的原位传感器阵列。同时，还提供了完整的飞机飞行信息，包括但不限于纬度、经度、高度和气象条件。