scholarly journals Design and pre-development of an airborne multi-species differential absorption Lidar system for water vapor and HDO isotope, carbon dioxide, and methane observation

2021 ◽  
Author(s):  
Jean-Baptiste Dherbecourt ◽  
M. Raybaut ◽  
J. M. Melkonian ◽  
J. Hamperl ◽  
R. Santagata ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Water Vapor ◽  
Differential Absorption ◽  
Lidar System ◽  
Differential Absorption Lidar

935 nm Differential Absorption Lidar System and Water Vapor Profiles in Convective Boundary Layer

2017 ◽  
Vol 37 (2) ◽  
pp. 0201003
Author(s):  
洪光烈 Hong Guanglie ◽  
李嘉唐 Li Jiatang ◽  
孔 伟 Kong Wei ◽  
葛 烨 Ge Ye ◽  
舒 嵘 Shu Rong
Keyword(s):  
Boundary Layer ◽  
Water Vapor ◽  
Convective Boundary Layer ◽  
Differential Absorption ◽  
Lidar System ◽  
Differential Absorption Lidar ◽  
Convective Boundary

Spectral control of an alexandrite laser for an airborne water-vapor differential absorption lidar system

1994 ◽  
Vol 33 (27) ◽  
pp. 6439 ◽  
Author(s):  
Patrick Ponsardin ◽  
Noah S. Higdon ◽  
Benoist E. Grossmann ◽  
Edward V. Browell
Keyword(s):  
Water Vapor ◽  
Alexandrite Laser ◽  
Differential Absorption ◽  
Lidar System ◽  
Differential Absorption Lidar ◽  
Spectral Control

scholarly journals Airborne differential absorption lidar system for measurements of atmospheric water vapor and aerosols

1994 ◽  
Vol 33 (27) ◽  
pp. 6422 ◽  
Author(s):  
Noah S. Higdon ◽  
Edward V. Browell ◽  
Patrick Ponsardin ◽  
Benoist E. Grossmann ◽  
Carolyn F. Butler ◽  
...  
Keyword(s):  
Water Vapor ◽  
Atmospheric Water Vapor ◽  
Differential Absorption ◽  
Atmospheric Water ◽  
Lidar System ◽  
Differential Absorption Lidar

scholarly journals Differential absorption lidar measurements of water vapor by the High Altitude Lidar Observatory (HALO): Retrieval framework and validation

2021 ◽  
Author(s):  
Brian J. Carroll ◽  
Amin R. Nehrir ◽  
Susan Kooi ◽  
James Collins ◽  
Rory A. Barton-Grimley ◽  
...  
Keyword(s):  
Water Vapor ◽  
High Altitude ◽  
Dynamic Range ◽  
Precipitable Water ◽  
Spatiotemporal Variability ◽  
High Spectral Resolution ◽  
Atmospheric Conditions ◽  
Differential Absorption ◽  
Differential Absorption Lidar ◽  
Wide Range

Abstract. Airborne differential absorption lidar (DIAL) offers a uniquely capable solution to the problem of measuring water vapor (WV) with high precision, accuracy, and resolution throughout the troposphere and lower stratosphere. The High Altitude Lidar Observatory (HALO) airborne WV DIAL was recently developed at NASA Langley Research Center and was first deployed in 2019. It uses four wavelengths at 935 nm to achieve sensitivity over a wide dynamic range, and simultaneously employs 1064 nm backscatter and 532 nm high spectral resolution lidar (HSRL) measurements for aerosol and cloud profiling. A key component of the WV retrieval framework is flexibly trading resolution for precision to achieve optimal data sets for scientific objectives across scales. A technique for retrieving WV in the lowest few hundred meters of the atmosphere using the strong surface return signal is also presented. The five maiden flights of the HALO WV DIAL spanned the tropics through midlatitudes with a wide range of atmospheric conditions, but opportunities for validation were sparse. Comparisons to dropsonde WV profiles were qualitatively in good agreement, though statistical analysis was impossible due to systematic error in the dropsonde measurements. Comparison of HALO to in situ WV measurements onboard the aircraft showed no substantial bias across three orders of magnitude, despite variance (R2 = 0.66) that may be largely attributed to spatiotemporal variability. Precipitable water vapor measurements from the spaceborne sounders AIRS and IASI compared very well to HALO with R2 > 0.96 over ocean and R2 = 0.86 over land.

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