ACE-Asia | CLAMS | SAFARI-2000 | PRiDE | ACE-2 |
AUTHORS:
Russell, P. B., Livingston, J. M., Schmid, B., Chien, A., Gasso, S., Hegg,
D., Noone,
K., Collins, D., Jonsson, H., Nielsen, K., Durkee, P. A., Flagan, R., Seinfeld,
J., Bates, T. S., Quinn, P. K.
(JML) SRI International, Menlo Park, CA;
(BS) Bay Area Environmental Research Institute, San Francisco, CA;
(AC) Symtech Corporation, Moffett Field, CA
(SG, DH) University of Washington, Seattle, WA
(KN) Stockholm University, Stockholm, Sweden
(DC, RF, JS) California Institute of Technology, Pasadena, CA
(HJ, KN, PAD) Naval Postgraduate School, Monterey, CA;
(TSB, PKQ) NOAA PMEL, Seattle, WA
CONTACT: prussell@mail.arc.nasa.gov
CACGP ABSTRACT:
Clear column closure studies of urban-marine and mineral-dust aerosols
using aircraft, ship, and satellite measurements in ACE-2
During the second Aerosol Characterization Experiment (ACE-2), European
urban-marine and African mineral-dust aerosols were measured by the Pelican
aircraft, the Research Vessel Vodyanitskiy, and NOAA satellites. The Pelican
measured aerosol optical depth and extinction spectra, water vapor columns
and vertical profiles using a 14-channel sunphotometer; aerosol absorption
coefficient and 3-wavelength scattering coefficients using an absorption
photometer and nephelometer; aerosol scattering humidification factors using
a passive humidigraph; and aerosol size distributions using a differential
mobility analyzer and two optical particle sizers. The R/V Vodyanitskiy
measured optical depth spectra and water vapor columns using a six-channel
tracking sunphotometer, plus aerosol size distributions and chemical compositions
using the NOAA-PMEL shipboard suite. The NOAA-12 and NOAA-14 satellites
measured upward-scattered radiances using AVHRR sensors, from which 2-wavelength
aerosol optical depths were derived. To assess the mutual consistency between
the measurements and the models or retrieval techniques that link them,
we show comparisons among the above properties, as well as the derived or
assumed spectra of single-scatter albedo and scattering phase function.
Results show that achieving closure, or mutual consistency, depends critically
on the methods used to account for aerosol hygroscopic growth, internal
or external composition mixtures, and the particle-size cutoffs of different
sampling instruments.
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