Evaluation of the High Altitude Lidar Observatory (HALO) methane retrievals during the summer 2019 ACT-America campaign

Barton-Grimley, Rory A.; Nehrir, Amin R.; Kooi, Susan A.; Collins, James E.; Harper, David B.; Notari, Anthony; Lee, Joseph; DiGangi, Joshua P.; Choi, Yonghoon; Davis, Kenneth J.

doi:https://doi.org/10.5194/amt-15-4623-2022

Articles | Volume 15, issue 15

https://doi.org/10.5194/amt-15-4623-2022

© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/amt-15-4623-2022

© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 15, issue 15

Research article

|

15 Aug 2022

Research article |

| 15 Aug 2022

Evaluation of the High Altitude Lidar Observatory (HALO) methane retrievals during the summer 2019 ACT-America campaign

Rory A. Barton-Grimley, Amin R. Nehrir, Susan A. Kooi, James E. Collins, David B. Harper, Anthony Notari, Joseph Lee, Joshua P. DiGangi, Yonghoon Choi, and Kenneth J. Davis

Data sets

ACT-America: L2 In Situ Atmospheric CO2, CO, CH4, and O3 Concentrations J. P. DiGangi, Y. Choi, J. B. Nowak, H. S. Halliday, M. M. Yang, B. C. Baier, and C. Sweeney https://doi.org/10.3334/ORNLDAAC/1556

ACT-America Campaign Catalog S. Pal and K. J. Davis https://doi.org/10.3334/ORNLDAAC/1862

Short summary

HALO is a multi-functional lidar that measures CH₄ columns and profiles of H₂O mixing ratio and aerosol/cloud optical properties. HALO supports carbon cycle, weather dynamics, and radiation science suborbital research and is a technology testbed for future space-based differential absorption lidar missions. In 2019 HALO collected CH₄ columns and aerosol/cloud profiles during the ACT-America campaign. Here we assess HALO's CH₄ accuracy and precision compared to co-located in situ observations.