The 2nd Aerosol Characterization Experiment (ACE-2): general overview and main results

Frank Raes; Timothy Bates; Frank McGovern; Marc Van Liedekerke

doi:10.3402/tellusb.v52i2.16088

The 2nd Aerosol Characterization Experiment (ACE-2): general overview and main results

Tellus B: Chemical and Physical Meteorology

Volume 52 (2000): Issue 2

By: Frank Raes, Timothy Bates, Frank McGovern and Marc Van Liedekerke

Open Access

|Jan 2000

Abstract

This overview summarizes the objectives of the Aerosol Characterization Experiments (ACEs) of the International Global Atmospheric Chemistry (IGAC) project and the research strategy implemented in the second of this series of experiments (ACE-2). ACE-2 took place from 16 June to 24 July 1997, over the sub-tropical North-East Atlantic. It provided an opportunity to study the properties, processes and effects of contrasting aerosol types in this region, including background marine and anthropogenic pollution aerosol in the marine boundary layer (MBL), and background aerosol and mineral dust in the overlaying free troposphere (FT). The major achievements of ACE-2 include:(a) identification of entrainment, in-cloud scavenging and coagulation as the major processes transforming a pollution aerosol transported within the MBL; (b) the first documentation of the indirect radiative effect of aerosols at the scale of a cloud ensemble in continental pollution outflow; (c) observation of a wide range in the contribution of organic material to the sub-micron aerosol mass, with possibly the highest contribution in the free tropospheric; (d) improved understanding of the role of condensing HCl, HNO₃ and NH₃ as a growth mechanism of sub-micron aerosols in polluted air masses advecting over the ocean. A close connection was observed between meteorological factors (such as horizontal and vertical wind speed, boundary layer development, entrainment, humidity fields) and aerosol and cloud characteristics. In the ACE-2 region, these meteorological factors, rather than aerosol microphysics and chemistry, often dominated the shaping of the aerosol size distribution and/or their effect on radiation and clouds. The ACE-2 data presently analyzed provide a qualitative, and in many cases a quantitative understanding of the complex gas/aerosol/cloud system in the sub-tropical marine environment. This will guide future model development. Some major data sets are still to be analyzed.

References

Bates , T. S. , Heubert , B. J. , Gras , J. L. , Griffiths , F. B. and Durkee , P. A . 1998 . International global atmo-spheric chemistry (IGAC) projects's first aerosol characterization experiment (ACE-1) . Overview. J. Geophys. Res . 103 , 16,297 – 16,318 .
Search in Google Scholar Back to article
Bates , T. S. , Quinn , P. K. , Covert , D. S. , Coffman , D. J. , Johnson , J. E. and Wiedensohler , A . 2000 . Aerosol physical properties and controlling processes in the lower marine boundary layer: a comparison of sub-micron data from ACE-1 and ACE-2 . Tellus 52B , 258 – 272 .
Search in Google Scholar Back to article
Brenguier , J. L. , Chuang , P. Y. , Fouquart , Y. , Johnson , D. W. , Parol , F. , Pawlowska , H. , Pelon , J. , Schuller , L. , Schroder , F. and Snider , J . 2000 . An overview of the ACE-2 Cloudycolumn closure experiment . Tellus 52B , 815 – 827 .
Search in Google Scholar Back to article
Bretherton , C. S. and Pincus , A . 1995 . Cloudiness and marine boundary layer dynamics in the ASTEX Lag-rangian experiments. Part 1: synoptic setting and ver-tical structure. J. Atmos. Sci . 52 , 2707 – 2723 .
Search in Google Scholar Back to article
Bower , K. N. , Choularton , T. W. , Gallagher , M. W. , Beswick , K. M. , Flynn , M. , Allen , A. G ., Davison ,
Search in Google Scholar Back to article
B. M. , James, J. D. , Robertson, L. , Harrison, R. M. , Hewitt, C. N. , Cape, J. N. , McFadyen, G. G. , Mar-tinsson, B. G. , Frank, G. , Swietlicki, E. , Zhou, J. , Berg, O. H. , Mentes, B. , Papaspiropoulos, G. , Hansson, H.-C. , Kulmala, M. , Aalto, P. , Väkeva, M. , Berner, A. , Bizjak, M. , DIM, S. , Laj, P. , Facchini, M.-C. , Orsi, G. , Ricci, L. , Nielsen, M. , Allen, B. J. , Coe, H. , McFig-gans, G. , Plane, J. M. C. , Collett Jr., J. L. , Moore K. F. and Sherman , D. E . 2000 . ACE-2 Hillcloud: an overview of the ACE-2 ground-based cloud experi-ment . Tellus 52B , 750 – 778 .
Search in Google Scholar Back to article
Charlson , R. J. , Schwartz , R. J. , Hales , J. M. , Cess , R.D. ., Coakley Jr., J. A., Hansen, J. E. and Hofmann, D. J. 1992. Climate forcing by anthropogenic aerosols. Science 255 , 423 – 430
Search in Google Scholar Back to article
Chuang , P. Y. , Collins , D. R. , Pawlowska , H. , Snider , J. R. , Jonsson , H. H. , Brenguier , J. L. , Flagan , R. C. and Seinfeld , J. H . 2000 . CCN measurements during ACE-2 and their relationship to cloud microphysical properties . Tellus 52B , 843 – 867 .
Search in Google Scholar Back to article
Collins , D. R. , Jonsson , H. H. , Seinfeld , J. H. , Flagan , R. C. , Gasso , S. , Hegg , D. A. , Russell , P. B. , Schmid , B. , Livingston , J. M. , Ostrom , E. , Noone , K. J ., Russell ,
Search in Google Scholar Back to article
L. M. and Putaud, J. P. 2000 . In-situ aerosol size distribtions and clear column radiative closure during ACE-2 . Tellus 52B , 498 – 525 .
Search in Google Scholar Back to article
Dore , A. J. , Johnson , D. W. , Osborne , S. R. , Choularton , T. W. , Bower , K. N. , Andreae , M.O. . and Bandy, B. J. 2000. Evolution of boundary layer aerosol particles due to in-cloud chemical reactions during the 2nd Lagrangian experiment of ACE-2. Tellus 52B , 452 – 462
Search in Google Scholar Back to article
Durkee , P. A. , Nielsen , K. E. , Smith , P. J. , Russell , P. B. , Schmid , B. , Livingston , J. M. , Holben , B. N ., Col-lins, D., Flagan, R. C., Seinfeld, J. H., Noone, K. J., Ostrom, E., Gassô, S., Hegg, D., Russell, L. M., Bates, T. S. and Quinn, P. K. 2000. Regional aerosol proper-ties from satellite observations: ACE-1, TARFOX and ACE-2 results. Tellus 52B , 484 – 497
Search in Google Scholar Back to article
Flamant, C. Pelon, J. , Chazette, P. , Trouillet, V. , Bru-neau, D. , Leon, J. F. , Bates, T. S. , Johnson, J. E. and Livingston, J. M. 2000. Airborne lidar measurements of aerosol spatial distribution and optical properties over the Atlantic Ocean during an European pollution outbreak of ACE-2. Tellus 52B , 662 – 677
Search in Google Scholar Back to article
Flynn , M. J. , Bower , K. N. , Choularton , T. W. , Wob-rock , W. and Makelä , J. M . 2000 . Modelling cloud processing of aerosol during the ACE-2 hillcloud experiment. Tellus B, this issue.
Search in Google Scholar Back to article
Formenti , P. , Andreae , M.O. . and Lelieveld, J. 2000. Measurements of aerosol optical depths in the north Atlantic free troposphere: results from ACE-2. Tellus 52B , 678 – 693
Search in Google Scholar Back to article
Gassô , S. , Hegg , D. A. , Covert , D. S. , Collins , D. , Noone , K. , Ostrom , E. , Schmid , B. , Russell , P. B. , Livingston , J. M. , Durkee , P. A. and Jonsson , H . 2000 . Influence of humidity on the aerosol scattering coeffi-cient and its effect on the upwelling radiance during ACE-2 . Tellus 52B , 546 – 567 .
Search in Google Scholar Back to article
Hegg , D. A. and Kaufman , Y. J . 1998 . Measurements of the relationship between sub-micron aerosol number and volume concentration . J. Geophys. Res . 103 , 5671 – 5678 .
Search in Google Scholar Back to article
Hoell, C. , O'Dowd, C. , Osborne, S. and Johnson, D. W. 2000. Timescale analysis of marine boundary layer aerosol evolution: Lagrangian case studies under clean and polluted cloudy conditions. Tellus 52B , 423 – 438
Search in Google Scholar Back to article
Husar , R. B. , Prospero , J. M. and Stowe , L. L . 1997 . Characterization of tropospheric aerosols over oceans with the NOAA advanced very high resolution radio-meter optical thickness operational product. J. Geo-phys. Res . 102 , 16,889 – 16,909
Search in Google Scholar Back to article
Johnson , R. , Businger , S. and Bearman , A . 2000 . Lag-rangian airmass tracking with smart balloons during ACE-2 . Tellus 52B , 321 – 334 .
Search in Google Scholar Back to article
Johnson , D. W. , Osborne , S. , Wood , R. , Suhre , K. , John-son , R. , Businger , S. , Quinn , P. K. , Wiedensohler , A. , Durkee , P. A. , Russell , L. M. , Andreae , M.O. ., O'Dowd, C., Noone, K. J., Bandy, B., Rudolph, J. and Rapsomanikis, S. 2000a. An overview of the Lagrang-ian experiments undertaken during the North Atlantic regional aerosol characterisation experiment (ACE-2). Tellus 52B , 290 – 320
Search in Google Scholar Back to article
Johnson , D. W. , Osborne , S. , Wood , R. , Suhre , K. , Quinn , P. K. , Bates , T. S. , Andreae , M.O. ., Noone, K., Glantz, P., Bandy, B., Rudolph, J. and O'Dowd, C. 2000b. Observations of the evolution of the aerosol, cloud and boundary layer characteristics during the first ACE-2 Lagrangian experimnent. Tellus 52B , 348 – 374
Search in Google Scholar Back to article
Kaufman , Y. J. , Hobbs , P. V. , Kirchoff , V. W. J. H. , Artaxo , P. , Remer , L. A. , Holben , B. N. , King , M. D. , Ward , D. E. , Prins , E. M. , Longo , K. M. , Mattos , L. F. , Nobre , C. A. , Spinhirne , J. D. , Ji , Q. , Thompson , A. M. , Gleason , J. F. , Christopher , S. A. and Tsay , S.-C . 1998 .
Search in Google Scholar Back to article
Smoke , Clouds, and Radiation-Brazil (SCAR-B) experiment. J. Geophys. Res . 103 , 31,783 – 31,808
Search in Google Scholar Back to article
Langner , J. and Rodhe , H . 1991 . A global three-dimen-sional model of the tropospheric sulfur cycle . J. Atmos. Chem . 13 , 225 – 263 .
Search in Google Scholar Back to article
Livingston , J. M. , Kapustin , V. N. , Schmid , B. , Russell , P. B. , Quinn , P. K. , Bates , T. S. , Durkee , P. A. , Smith , P. J. , Freudenthaler , V. , Wiegner , M. , Covert , D. S. , Gasso , S. , Hegg , D. , Collins , D. R. , Flagan , R. C. , Seinfeld , J. H. , Vitale , V. and Tomasi , C . 2000 . Shipboard sunphotometer measurements of aerosol optical depth spectra and columnar water vapor during ACE-2 and comparison with selected land, ship, aircraft and satellite measurements . Tellus 52B , 594 – 619 .
Search in Google Scholar Back to article
Martinsson , B. G. , Frank , G. , Cederfelt , SA. , Berg, O. H., Mentes, B., Papaspiropoulos, G., Sietlicki, E., Zhou, J., Flynn, M., Bower, K. N., Choularton, T. W., Makelä, J., Virkkula, A. and Van Dingenen, R. 2000. Validation of very high cloud droplet number concen-trations in air masses transported thousands of kilo-metres over the ocean. Tellus 52B , 801 – 814
Search in Google Scholar Back to article
McGovern , F. M. , Raes , F. , Van Dingenen , R. and Maring , H . 1999 . Anthropogenic influences on the chemical and physical properties of aerosols in the Atlantic subtropical region during July 1994 and July 1995. J. Geophys. Res . 104 , 14,309 – 14,321
Search in Google Scholar Back to article
Neustlls, C. , Weise, D. , Birmili, W. , Wex, H. , Wieden-sohler, A. and Covert, D. 2000. Size-segregated chem-ical, gravimetric, and number distribution derived mass closure of the aerosol in Sagres, Portugal during ACE-2. Tellus 52B , 169 – 184
Search in Google Scholar Back to article
Novakov , T. , Bates , T. S. and Quinn , P. K . 2000 . Ship-board measurements of concentrations and properties of carbonaceous aerosols during ACE-2 . Tellus 52B , 228 – 238 .
Search in Google Scholar Back to article
Osborne , S. R. , Johnson , D. W. , Wood , R. , Bandy , B. J. , Andreae , M.O. ., O'Dowd, C. D., Glantz, P., Noone, K., Rudolph, J., Bates, T. S. and Quinn, P. K. 2000, Evolu-tion of the aerosol, cloud and boundary layer dynamic and thermodynamic characteristics during the 2nd Lagrangian experiment of ACE-2. Tellus 52B , 375 – 400
Search in Google Scholar Back to article
Ostrom , E. and Noone , K. J . 2000 . Vertical profiles of aerosol scattering and absorption measured in-situ during the North Atlantic aerosol characterization experiment . Tellus 52B , 526 – 545 .
Search in Google Scholar Back to article
Pawlowska , H. and Brenguier , J.-L . 2000 . Microphysical properties of stratocumulus clouds during ACE-2 . Tellus 52B , 868 – 887 .
Search in Google Scholar Back to article
Putaud , J.-P. , Van Dingenen , R. , Mangoni , M. , Virk-kula , A. , Raes , F. , Maring , H. , Prospero , J. M. , Swiet-licki , E. , Berg, O., Hillamo, R. and Makela, T. 2000. Chemical mass closure and assessment of the origin of the submicron aerosol in the marine boundary layer and the free troposphere at Tenerife during ACE-2. Tellus 52B , 141 – 168
Search in Google Scholar Back to article
Quinn , P. K. , Bates , T. S. , Coffman , D. J. , Miller , T. L. , Johnson , J. E. and Covert , D. S ., 2000 . A comparison of aerosol chemical and optical properties from the first and second aerosol characterization experiments . Tellus 52B , 239 – 257 .
Search in Google Scholar Back to article
Raes , F. and Bates , T . 1995 . ACE-2. North Atlantic regional aerosol characterisation experiment . Office for Official Publications of the European Communities, Catalogue LCL-NA-16229-EN-C, ECSC-EC-EAEC Brussels-Luxembourg.
Search in Google Scholar Back to article
Raes , F. , Van Dingenen , R. , Cuevas , E. , Van Velthoven , P. F. J. and Propspero , J. M . 1997 . Observations of aerosols in the free troposphere and marine boundary layer of the subtropical North East Atlantic: discussion of processes determining their size distribution. J. Geo-phys. Res . 102 , 21,315 – 21,328
Search in Google Scholar Back to article
Russell , P. B. and Heintzenberg , J . 2000 . An overview of the ACE-2 clear sky column closure experiment (CLEARCOLUMN) . Tellus 52B , 463 – 483 .
Search in Google Scholar Back to article
Russell , P. B. , Hobbs , P. V. and Stowe , L. L . 1999 . Aerosol properties and radiative effects in the US East Coast haze plume: an overview of the tropospheric aerosol radiative forcing observational experiment (TARFOX) .
Search in Google Scholar Back to article
Schmeling , M. , Russell , L. M. , Erlick , C. , Collins , D. R. , Jonsson , H. , Wang , Q. , Kregsamer , P. and Streli , C . 2000 . Chemical composition and characterization of aerosol particles from Pelican flights in clean, anthro-pogenically-influenced and dust-containing air masses during ACE-2 . Tellus 52B , 185 – 200 .
Search in Google Scholar Back to article
Schmid , B. , Livingston , J. M. , Russell , P. B. , Durkee , P. A. , Jonsson , H. H. , Collins , D. R. , Flagan , R. C. , Seinfeld , J. H. , Gasso , S. , Hegg , D. A. , Ostrom , E. , Noone , K. J. , Welton , E. J. , Voss , K. J. , Gordon , H. R. , Formenti , P. and Andreae , M.O. . 2000 . Clear sky closure studies of lower tropospheric aerosol and water vapor during ACE-2 using airborne sunphoto-meter, airborne in-situ, space-borne and ground based measurements. Tellus 52B , 568 – 593
Search in Google Scholar Back to article
Snider , J. R. and Brenguier , J.-L . 2000 . A comparison of cloud condensation nuclei and cloud droplet measure-ments obtained during ACE-2 . Tellus 52B , 828 – 842 .
Search in Google Scholar Back to article
Sollazzo , M. J. , Russell , L. M. , Percival, D., Osborne, S., Wood, R. and Johnson, D. W. 2000. Entrainment rates during ACE-2 Lagrangian experiments calculated from aircraft measurements. Tellus 52B , 335 – 347
Search in Google Scholar Back to article
Swietlicki , E. , Zhou , J. , Covert , D. S. , Hameri , K. , Busch , B. , Vakeva , M. , Dusek , U. , Berg, O. H., Wieden-sohler, A., Aalto, P., Makela, J., Marinsson, B. G., Papaspiropoulos, G., Mentes, B., Frank, G. and Strat-mann, F. 2000. Hygroscopic properties of aerosol par-ticles in the north-eastern Atlantic during ACE-2. Tellus 52B , 201 – 227
Search in Google Scholar Back to article
Van Dingenen , R. , Raes , F. , Putaud , J.-P. , Virkkula , A. and Mangoni , M . 1999 . Processes determining the relationship between aerosol number and non-sea-salt sulfate mass concentrations in the clean and perturbed marine boundary layer . J. Geophys. Res . 104 , 8027 – 8038 .
Search in Google Scholar Back to article
Van Dingenen , R. , Virkkula A.O. ., Raes, F., Bates, T. S. and Wiedensohler, A. 2000. A simple non-linear ana-lytical relationship between aerosol accumulation number and sub-micron volume, explaining their observed ratio in the clean and polluted marine boundary layer. Tellus 52B , 439 – 451
Search in Google Scholar Back to article
Verver , G. , Raes , F. , Vogelezang , D. and Johnson , D. W . 2000 . The 2nd aerosol characterisation experiment: meteorological and chemical overview . Tellus 52B , 126 – 140 .
Search in Google Scholar Back to article
Vitale , V. , Tomasi , C. , Bonafé , U. , Marani , S. , Lupi , A. , Cacciari , A. and Ruggeri , P . 2000 . Spectral measure-ments of aerosol particle extinction in the 04-3.7 micrometer wavelength range, performed at Sagres with the IR-RAD sunradiometer . Tellus 52B , 716 – 733 .
Search in Google Scholar Back to article
Welton , E. J. , Voss , K. J. , Gordon , H. R. , Maring , H. , Smirnov , A. , Holben , B. , Schmid , B. , Livingston , J. M. , Russell , P. B. , Durkee , P. A. , Formenti , P. , Andrea , M.O. . and Dobovik, O. 2000. Ground-based lidar measurements of aerosols during ACE-2: instrument description, results, and comparisons with other ground based and airborne measurements. Tellus 52B , 636 – 651
Search in Google Scholar Back to article
Wiedensohler , A. , Orsini , D. , Covert , D. S. , Coffmann , D. , Cantrell , W. , Havlicek , M. , Brechtel , F. J. , Russell , L. M. , Weber , R. J. , Gras , J. , Hudson , J. G. and Litchy , M. 1997. Intercomparison study of size dependent counting efficiency of 26 condensation particle coun-ters . Aerosol Sci. Technol . 27 , 224 – 242 .
Search in Google Scholar Back to article
Wood , R. , Johnson, D. , Osborne, S. , Andreae, M. O. , Bandy, B. , Bates, T. S. , O'Dowd, C. , Glantz, P. , Noone, K. , Quinn, P. , Rudolph, J. and Suhre, K. 2000 . Boundary layer and aerosol evolution duringthe Lag-rangian experimentof ACE-2 . Tellus 52B , 401 – 422 .
Search in Google Scholar Back to article

Articles in this issue

DOI: https://doi.org/10.3402/tellusb.v52i2.16088 | Journal eISSN: 1600-0889

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Language: English

Page range: 111 - 125

Submitted on: Sep 10, 1999

Accepted on: Oct 11, 1999

Published on: Jan 1, 2000

Published by: Stockholm University Press

In partnership with: Paradigm Publishing Services

© 2000 Frank Raes, Timothy Bates, Frank McGovern, Marc Van Liedekerke, published by Stockholm University Press
This work is licensed under the Creative Commons Attribution 4.0 License.

Volume 52 (2000): Issue 2