Results from the Fourth WMO Filter Radiometer Comparison for aerosol optical depth measurements
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Results from the Fourth WMO Filter Radiometer Comparison for aerosol optical depth measurements

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Results from the Fourth WMO Filter Radiometer Comparison for aerosol optical depth measurements

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dc.contributor.author Kazadzis, Stelios
dc.contributor.author Kouremeti, Natalia
dc.contributor.author Diémoz, Henri
dc.contributor.author Gröbner, Julian
dc.contributor.author Forgan, Bruce W.
dc.contributor.author Campanelli, M.
dc.contributor.author Estellés Leal, Víctor
dc.contributor.author Lantz, Kathleen
dc.contributor.author Michalsky, Joseph
dc.contributor.author Carlund, Thomas
dc.contributor.author Cuevas-Agulló, Emilio
dc.contributor.author Toledano, Carlos
dc.contributor.author Becker, Ralf
dc.contributor.author Nyeki, Stephan
dc.contributor.author Kosmopoulos, Panagiotis G.
dc.contributor.author Tatsiankou, Viktar
dc.contributor.author Vuilleumier, Laurent
dc.contributor.author Denn, Frederick M.
dc.contributor.author Ohkawara, Nozomu
dc.contributor.author Ijima, Osamu
dc.contributor.author Goloub, Philippe
dc.contributor.author Raptis, Panagiotis I.
dc.contributor.author Milner, Michael
dc.contributor.author Behrens, Klaus
dc.contributor.author Barreto, Africa
dc.contributor.author Martucci, Giovanni
dc.contributor.author Hall, Emiel
dc.contributor.author Wendell, James
dc.contributor.author Fabbri, Bryan E.
dc.contributor.author Wehrli, Christoph
dc.date.accessioned 2019-04-10T16:53:21Z
dc.date.available 2019-04-10T16:53:21Z
dc.date.issued 2018
dc.identifier.uri http://hdl.handle.net/10550/69841
dc.description.abstract This study presents the results of the Fourth Filter Radiometer Comparison that was held in Davos, Switzerland, between 28 September and 16 October 2015. Thirty filter radiometers and spectroradiometers from 12 countries participated including reference instruments from global aerosol networks. The absolute differences of all instruments compared to the reference have been based on the World Meteorological Organization (WMO) criterion defined as follows: 95% of the measured data has to be within 0.005±0.001∕m (where m is the air mass). At least 24 out of 29 instruments achieved this goal at both 500 and 865nm, while 12 out of 17 and 13 out of 21 achieved this at 368 and 412nm, respectively. While searching for sources of differences among different instruments, it was found that all individual differences linked to Rayleigh, NO2, ozone, water vapor calculations and related optical depths and air mass calculations were smaller than 0.01 in aerosol optical depth (AOD) at 500 and 865nm. Different cloud-detecting algorithms used have been compared. Ångström exponent calculations showed relatively large differences among different instruments, partly because of the high calculation uncertainty of this parameter in low AOD conditions. The overall low deviations of these AOD results and the high accuracy of reference aerosol network instruments demonstrated a promising framework to achieve homogeneity, compatibility and harmonization among the different spectral AOD networks in the near future.
dc.language.iso eng
dc.relation.ispartof Atmospheric Chemistry and Physics, 2018, num. 18, p. 3185-3201
dc.rights.uri info:eu-repo/semantics/openAccess
dc.source Kazadzis, Stelios Kouremeti, Natalia Diémoz, Henri Gröbner, Julian Forgan, Bruce W. Campanelli, M. Estellés Leal, Víctor Lantz, Kathleen Michalsky, Joseph Carlund, Thomas Cuevas-Agulló, Emilio Toledano, Carlos Becker, Ralf Nyeki, Stephan Kosmopoulos, Panagiotis G. Tatsiankou, Viktar Vuilleumier, Laurent Denn, Frederick M. Ohkawara, Nozomu Ijima, Osamu Goloub, Philippe Raptis, Panagiotis I. Milner, Michael Behrens, Klaus Barreto, Africa Martucci, Giovanni Hall, Emiel Wendell, James Fabbri, Bryan E. Wehrli, Christoph 2018 Results from the Fourth WMO Filter Radiometer Comparison for aerosol optical depth measurements Atmospheric Chemistry and Physics 18 3185 3201
dc.subject Aerosols
dc.subject Termodinàmica atmosfèrica
dc.title Results from the Fourth WMO Filter Radiometer Comparison for aerosol optical depth measurements
dc.type info:eu-repo/semantics/article
dc.date.updated 2019-04-10T16:53:22Z
dc.identifier.doi https://doi.org/10.5194/acp-18-3185-2018
dc.identifier.idgrec 126883

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