Lidar measurements during Aerosols99

Kenneth Voss, Ellsworth J. Welton, Patricia K. Quinn, James Johnson, Anne M. Thompson, Howard R. Gordon

Research output: Contribution to journalArticle

42 Citations (Scopus)

Abstract

The Aerosols99 cruise (January 14 to February 8, 1999) went between Norfolk, Virginia, and Cape Town, South Africa. A Micropulse lidar system was used almost continually during this cruise to profile the aerosol vertical structure. Inversions of this data illustrated a varying vertical structure depending on the dominant air mass. In clean maritime aerosols in the Northern and Southern Hemispheres the aerosols were capped at 1 km. When a dust event from Africa was encountered, the aerosol extinction increased its maximum height to above 2 km. During a period in which the air mass was dominated by biomass burning from southern Africa, the aerosol layer extended to 4 km. Comparisons of the aerosol optical depth (AOD) derived from lidar inversion and surface Sun photometers showed an agreement within ±0.05 RMS. Similar comparisons between the extinction measured with a nephelometer and particle soot absorption photometer (at 19 m altitude) and the lowest lidar measurement (75 m) showed good agreement (±0.014 km-1). The lidar underestimated surface extinction during periods when an elevated aerosol layer (total AOD > 0.10) was present over a relatively clean (aerosol extinction <0.05 km-1) surface layer, but otherwise gave accurate results.

Original languageEnglish (US)
Article number2001JD900217
Pages (from-to)20821-20831
Number of pages11
JournalJournal of Geophysical Research C: Oceans
Volume106
Issue numberD18
StatePublished - Sep 27 2001

Fingerprint

Optical radar
Aerosols
optical radar
lidar
aerosols
aerosol
extinction
Photometers
air masses
photometer
air mass
optical thickness
optical depth
photometers
Nephelometers
nephelometers
inversions
Soot
Light extinction
biomass burning

ASJC Scopus subject areas

  • Geochemistry and Petrology
  • Geophysics
  • Earth and Planetary Sciences (miscellaneous)
  • Space and Planetary Science
  • Atmospheric Science
  • Astronomy and Astrophysics
  • Oceanography

Cite this

Voss, K., Welton, E. J., Quinn, P. K., Johnson, J., Thompson, A. M., & Gordon, H. R. (2001). Lidar measurements during Aerosols99. Journal of Geophysical Research C: Oceans, 106(D18), 20821-20831. [2001JD900217].

Lidar measurements during Aerosols99. / Voss, Kenneth; Welton, Ellsworth J.; Quinn, Patricia K.; Johnson, James; Thompson, Anne M.; Gordon, Howard R.

In: Journal of Geophysical Research C: Oceans, Vol. 106, No. D18, 2001JD900217, 27.09.2001, p. 20821-20831.

Research output: Contribution to journalArticle

Voss, K, Welton, EJ, Quinn, PK, Johnson, J, Thompson, AM & Gordon, HR 2001, 'Lidar measurements during Aerosols99', Journal of Geophysical Research C: Oceans, vol. 106, no. D18, 2001JD900217, pp. 20821-20831.
Voss K, Welton EJ, Quinn PK, Johnson J, Thompson AM, Gordon HR. Lidar measurements during Aerosols99. Journal of Geophysical Research C: Oceans. 2001 Sep 27;106(D18):20821-20831. 2001JD900217.
Voss, Kenneth ; Welton, Ellsworth J. ; Quinn, Patricia K. ; Johnson, James ; Thompson, Anne M. ; Gordon, Howard R. / Lidar measurements during Aerosols99. In: Journal of Geophysical Research C: Oceans. 2001 ; Vol. 106, No. D18. pp. 20821-20831.
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