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The impact of lidar detection sensitivity on assessing aerosol direct radiative effects: LIDAR SENSITIVITY AND AEROSOL DRE

Journal Article · · Geophysical Research Letters
DOI:https://doi.org/10.1002/2017gl074521· OSTI ID:1533003
 [1];  [2];  [2];  [2];  [3]
  1. NASA Langley Research Center, Hampton, VA (United States); DOE/OSTI
  2. NASA Langley Research Center, Hampton, VA (United States)
  3. Univ. of Washington, Seattle, WA (United States)
+ Show Author Affiliations
Spaceborne lidar observations have great potential to provide accurate global estimates of the aerosol direct radiative effect (DRE) in both clear and cloudy conditions. However, comparisons between observations from the Cloud-Aerosol Lidar and Infrared Pathfinder Satellite (CALIPSO) and multiple years of Atmospheric Radiation Measurement (ARM) program's ground-based Raman lidars (RL) show that CALIPSO does not detect all radiatively significant aerosol, i.e., aerosol that directly modifies the Earth's radiation budget. We estimated that using CALIPSO observations results in an underestimate of the magnitude of the global mean aerosol DRE by up to 54%. The ARM RL data sets along with NASA Langley airborne high spectral resolution lidar data from multiple field campaigns are used to derive the detection sensitivity required to accurately resolve the aerosol DRE. This shows that a lidar with a backscatter coefficient detection sensitivity of about 1–2 × 10-4 km-1 sr-1 at 532 nm would resolve all the aerosol needed to derive the DRE to within 1%.
Research Organization:
NASA Langley Research Center, Hampton, VA (United States); Univ. of Washington, Seattle, WA (United States)
Sponsoring Organization:
USDOE Office of Science (SC)
Grant/Contract Number:
SC0010557; SC0014042
OSTI ID:
1533003
Journal Information:
Geophysical Research Letters, Journal Name: Geophysical Research Letters Journal Issue: 17 Vol. 44; ISSN 0094-8276
Publisher:
American Geophysical UnionCopyright Statement
Country of Publication:
United States
Language:
English

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Cited By (6)

On the Limits of CALIOP for Constraining Modeled Free Tropospheric Aerosol journal September 2018
Intra-annual variations of regional aerosol optical depth, vertical distribution, and particle types from multiple satellite and ground-based observational datasets journal January 2018
Estimations of global shortwave direct aerosol radiative effects above opaque water clouds using a combination of A-Train satellite sensors journal January 2019
Intra-annual variations of regional aerosol optical depth, vertical distribution, and particle types from multiple satellite and ground-based observational datasets posted_content April 2018
The CALIPSO version 4 automated aerosol classification and lidar ratio selection algorithm journal January 2018
Novel aerosol extinction coefficients and lidar ratios over the ocean from CALIPSO–CloudSat: evaluation and global statistics journal January 2019

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