Aerosol optical depth measurements during the Aerosols99 experiment

Kenneth Voss, Ellsworth J. Welton, Patricia K. Quinn, Robert Frouin, Mark Miller, R. Michael Reynolds

Research output: Contribution to journalArticle

24 Citations (Scopus)

Abstract

The Aerosols99 cruise took place during the period from January 14 to February 8, 1999, on the R/V Ronald Brown. The cruise track was almost a straight line in the southeast direction from Norfolk, Virginia, to Cape Town, South Africa, and afforded the opportunity to sample several different aerosol regimes over the North and South Atlantic. Handheld sunphotometers, a shadowband radiometer (FRSR), and a LIDAR were used to measure the aerosol optical depth (AOD) during the cruise. The AOD and angstrom exponent α (spectral dependence of the AOD) varied strongly between regimes. Maritime regions typically had AOD (500 nm) of approximately 0.10 ± 0.03, with α around 0.3 ± 0.3. An African dust event was encountered in which the AOD (500 nm) averaged 0.29 ± 0.05 with an α of 0.36 ± 0.13. At the Intertropical Convergence Zone (ITCZ), no measurements were obtained because of cloudiness; however, after the ITCZ we encountered a biomass burning aerosol with high average AOD (500 nm) of 0.36 ± 0.13, and a high α (0.88 ± 0.30). Farther south the aerosol went back to the low levels of a typical marine aerosol.

Original languageEnglish (US)
Article number2000JD900783
Pages (from-to)20811-20819
Number of pages9
JournalJournal of Geophysical Research C: Oceans
Volume106
Issue numberD18
StatePublished - Sep 27 2001

Fingerprint

depth measurement
Aerosols
optical thickness
optical depth
aerosols
aerosol
experiment
Experiments
intertropical convergence zone
biomass burning
Republic of South Africa
Radiometers
radiometers
cloud cover
radiometer
Dust
Biomass
dust
exponents

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., Frouin, R., Miller, M., & Reynolds, R. M. (2001). Aerosol optical depth measurements during the Aerosols99 experiment. Journal of Geophysical Research C: Oceans, 106(D18), 20811-20819. [2000JD900783].

Aerosol optical depth measurements during the Aerosols99 experiment. / Voss, Kenneth; Welton, Ellsworth J.; Quinn, Patricia K.; Frouin, Robert; Miller, Mark; Reynolds, R. Michael.

In: Journal of Geophysical Research C: Oceans, Vol. 106, No. D18, 2000JD900783, 27.09.2001, p. 20811-20819.

Research output: Contribution to journalArticle

Voss, K, Welton, EJ, Quinn, PK, Frouin, R, Miller, M & Reynolds, RM 2001, 'Aerosol optical depth measurements during the Aerosols99 experiment', Journal of Geophysical Research C: Oceans, vol. 106, no. D18, 2000JD900783, pp. 20811-20819.
Voss K, Welton EJ, Quinn PK, Frouin R, Miller M, Reynolds RM. Aerosol optical depth measurements during the Aerosols99 experiment. Journal of Geophysical Research C: Oceans. 2001 Sep 27;106(D18):20811-20819. 2000JD900783.
Voss, Kenneth ; Welton, Ellsworth J. ; Quinn, Patricia K. ; Frouin, Robert ; Miller, Mark ; Reynolds, R. Michael. / Aerosol optical depth measurements during the Aerosols99 experiment. In: Journal of Geophysical Research C: Oceans. 2001 ; Vol. 106, No. D18. pp. 20811-20819.
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