We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Airborne Lidar Measurements of Atmospheric CO<sub>2</sub> Column Concentrations to Cloud Tops made during the 2017 ASCENDS/ABoVE Campaign.
- Authors
Jianping Mao; Abshire, James B.; Kawa, S. Randy; Xiaoli Sun; Riris, Haris
- Abstract
We measured the column-averaged atmospheric CO2 mixing ratio (XCO2) to a variety of cloud tops with an airborne pulsed multi-wavelength integrated path differential absorption (IPDA) lidar during NASA's 2017 ASCENDS/ABoVE field campaign. Measurements of height- resolved atmospheric backscatter profiles allow this lidar technique to estimate XCO2 to cloud tops as well as to the ground with accurate knowledge of the photon path-length. We validated these measurements with those from an onboard in situ CO2 sensor during spiral down maneuvers. These lidar measurements were 2-3 times better than those from previous airborne campaigns, due to our using a wavelength step-locked laser diode source and a high-efficiency detector for this campaign. Precisions of 0.6 parts per million (ppm) were achieved for 10-s average measurements to mid-level clouds and 0.9 ppm to low-level clouds at the top of the planetary boundary layer. This study demonstrates the lidar's capability to fill in XCO2 measurement gaps in cloudy regions and to help resolve the vertical and horizontal distributions of atmospheric CO2. Future airborne campaigns and spaceborne missions with this capability can be used to improve atmospheric transport modeling, flux estimation, and carbon data assimilation.
- Subjects
UNITED States. National Aeronautics &; Space Administration; ATMOSPHERIC boundary layer; LIDAR; ATMOSPHERIC transport; SEMICONDUCTOR lasers; BACKSCATTERING
- Publication
Atmospheric Measurement Techniques Discussions, 2023, p1
- ISSN
1867-8610
- Publication type
Article
- DOI
10.5194/amt-2023-174