Spaceborne lidar aerosol retrieval approaches based on aerosol model constraints

J. Reagan, X. Wang, C. Cattrall, K. Thome

Research output: Contribution to conferencePaperpeer-review

9 Scopus citations

Abstract

In the absence of auxiliary optical depth or transmittance information, or self-determination of same for specialized observing situations, aerosol backscatter and extinction profiles cannot be retrieved from lidar observations along a single direction without an assumption linking aerosol extinction and backscatter (i.e., the aerosol extinction-to-backscatter ratio, or aerosol lidar ratio, S a). Aerosol retrievals at 532 nm for the current GLAS and upcoming CALIPSO satellite lidar missions employ/will employ a look-up table approach to select climatologically based S a model values for these retrievals when alternate, less uncertain methods for either defining S a or providing the needed auxiliary information are unavailable. This paper addresses a revised table look-up approach that incorporates two notable revisions for improved S a selection which, as a consequence, enable more bounded aerosol retrievals. One is a refined, more bounded set of S a values, both for 532 nm and 1064 nm, representative of a definitive set of aerosol types/models determined from an extensive analysis of the global aerosol solar radiometer network, AERONET, data base [1]. The other is an accompanying set of key spectral ratio parameters (i.e., dual wavelength, 532 nm to 1064 nm, ratios of backscatter, extinction and S a) also derived from the AERONET data which offer additional ways to bound the lidar aerosol retrievals. Thus, aerosol retrievals can be obtained subject to the constraints that the lidar data yield retrievals with spectral ratio parameters consistent with a given aerosol model (or models), to confirm the model choice and better bound the retrievals. Examples of retrievals make subject to these constraints are included as a part of the paper.

Original languageEnglish (US)
Pages1940-1943
Number of pages4
StatePublished - Dec 1 2004
Event2004 IEEE International Geoscience and Remote Sensing Symposium Proceedings: Science for Society: Exploring and Managing a Changing Planet. IGARSS 2004 - Anchorage, AK, United States
Duration: Sep 20 2004Sep 24 2004

Other

Other2004 IEEE International Geoscience and Remote Sensing Symposium Proceedings: Science for Society: Exploring and Managing a Changing Planet. IGARSS 2004
CountryUnited States
CityAnchorage, AK
Period9/20/049/24/04

ASJC Scopus subject areas

  • Computer Science Applications
  • Earth and Planetary Sciences(all)

Fingerprint Dive into the research topics of 'Spaceborne lidar aerosol retrieval approaches based on aerosol model constraints'. Together they form a unique fingerprint.

Cite this