Evaluation of sun photometer capabilities for retrievals of aerosol optical depth at high latitudes: the POLAR-AOD intercomparison campaigns
Accuracy requirements for aerosol optical depth (AOD) in polar regions are much more stringent tan those usually encountered in established sun photometer networks, while comparability of data from different archive centres is a further important issue. Therefore, two intercomparison campaigns were...
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ftaemet:oai:repositorio.aemet.es:20.500.11765/11692 2024-06-23T07:47:02+00:00 Evaluation of sun photometer capabilities for retrievals of aerosol optical depth at high latitudes: the POLAR-AOD intercomparison campaigns Mazzola, Mauro Stone, Robert S. Herber, Andreas Tomasi, Claudio Lupi, Angelo Vitale, Vito Lanconelli, Christian Toledano, Carlos Cachorro, Victoria E. O'Neill, Norman T. Shiobara, Masataka Aaltonen, Veijo Stebel, Kerstin Zielinski, Tymon Petelski, Tomasz Ortiz de Galisteo, José Pablo Torres, Benjamín Berjón, Alberto Goloub, Philippe Li, Z. Blarel, Luc Abboud, Ihab Cuevas Agulló, Emilio Stock, Maria Schulz, Karl-Heinz Virkkula, Aki 2012 https://hdl.handle.net/20.500.11765/11692 eng eng Elsevier https://dx.doi.org/10.1016/j.atmosenv.2011.07.042 Atmospheric Environment. 2012, 52, p. 4-17 1352-2310 http://hdl.handle.net/20.500.11765/11692 info:eu-repo/semantics/openAccess Aerosol Polar regions Sun photometry Optical depth Intercomparison Calibration info:eu-repo/semantics/article 2012 ftaemet https://doi.org/20.500.11765/1169210.1016/j.atmosenv.2011.07.042 2024-06-03T14:17:57Z Accuracy requirements for aerosol optical depth (AOD) in polar regions are much more stringent tan those usually encountered in established sun photometer networks, while comparability of data from different archive centres is a further important issue. Therefore, two intercomparison campaigns were held during spring 2006 at Ny-Ålesund (Svalbard) and autumn 2008 at Izaña (Tenerife) within the framework of the IPY POLAR-AOD project, with the participation of various research institutions routinely employing different instrument models at Arctic and Antarctic stations. As reported here, a common algorithm was used for data analysis with the aim of minimizing a large part of the discrepancies affecting the previous studies. During the Ny-Ålesund campaign, spectral values of AOD derived from measurements taken with different instruments were found to agree, presenting at both 500 nm and 870 nm wavelengths average values of root mean square difference (RMSD) and standard deviation of the difference (SDD) equal to 0.003. Correspondingly, the mean bias difference (MBD) varied mainly between _0.003 and þ0.003 at 500 nm, and between _0.004 and þ0.003 at 870 nm. During the Izaña campaign, which was also intended as an intercalibration opportunity, RMSD and SDD values were estimated to be equal to 0.002 for both channels on average, with MBD ranging between _0.004 and þ0.004 at 500 nm and between _0.002 and þ0.003 at 870 nm. RMSD and SDD values for Ångström exponent a were estimated equal to 0.06 during the Ny-Ålesund campaign and 0.39 at Izaña. The results confirmed that sun photometry is a valid technique for aerosol monitoring in the pristine atmospheric turbidity conditions usually observed at high latitudes. The Italian research activity was supported by the Programma Nazionale di Ricerche in Antartide (PNRA) and developed as a part of Subproject 2006/6.01: “POLAR-AOD: a network to characterize the means, variability and trends of the climate-forcing properties of aerosols in polar regions”. The GOA-UVA group was ... Article in Journal/Newspaper Antarc* Antarctic Antartide Arctic IPY Ny Ålesund Ny-Ålesund Svalbard ARCIMÍS (Archivo Climatológico y Meteorológico Institucional - AEMET, Agencia Estatal de Meteorología) Arctic Antarctic Svalbard Ny-Ålesund Atmospheric Environment 52 4 17 |
institution |
Open Polar |
collection |
ARCIMÍS (Archivo Climatológico y Meteorológico Institucional - AEMET, Agencia Estatal de Meteorología) |
op_collection_id |
ftaemet |
language |
English |
topic |
Aerosol Polar regions Sun photometry Optical depth Intercomparison Calibration |
spellingShingle |
Aerosol Polar regions Sun photometry Optical depth Intercomparison Calibration Mazzola, Mauro Stone, Robert S. Herber, Andreas Tomasi, Claudio Lupi, Angelo Vitale, Vito Lanconelli, Christian Toledano, Carlos Cachorro, Victoria E. O'Neill, Norman T. Shiobara, Masataka Aaltonen, Veijo Stebel, Kerstin Zielinski, Tymon Petelski, Tomasz Ortiz de Galisteo, José Pablo Torres, Benjamín Berjón, Alberto Goloub, Philippe Li, Z. Blarel, Luc Abboud, Ihab Cuevas Agulló, Emilio Stock, Maria Schulz, Karl-Heinz Virkkula, Aki Evaluation of sun photometer capabilities for retrievals of aerosol optical depth at high latitudes: the POLAR-AOD intercomparison campaigns |
topic_facet |
Aerosol Polar regions Sun photometry Optical depth Intercomparison Calibration |
description |
Accuracy requirements for aerosol optical depth (AOD) in polar regions are much more stringent tan those usually encountered in established sun photometer networks, while comparability of data from different archive centres is a further important issue. Therefore, two intercomparison campaigns were held during spring 2006 at Ny-Ålesund (Svalbard) and autumn 2008 at Izaña (Tenerife) within the framework of the IPY POLAR-AOD project, with the participation of various research institutions routinely employing different instrument models at Arctic and Antarctic stations. As reported here, a common algorithm was used for data analysis with the aim of minimizing a large part of the discrepancies affecting the previous studies. During the Ny-Ålesund campaign, spectral values of AOD derived from measurements taken with different instruments were found to agree, presenting at both 500 nm and 870 nm wavelengths average values of root mean square difference (RMSD) and standard deviation of the difference (SDD) equal to 0.003. Correspondingly, the mean bias difference (MBD) varied mainly between _0.003 and þ0.003 at 500 nm, and between _0.004 and þ0.003 at 870 nm. During the Izaña campaign, which was also intended as an intercalibration opportunity, RMSD and SDD values were estimated to be equal to 0.002 for both channels on average, with MBD ranging between _0.004 and þ0.004 at 500 nm and between _0.002 and þ0.003 at 870 nm. RMSD and SDD values for Ångström exponent a were estimated equal to 0.06 during the Ny-Ålesund campaign and 0.39 at Izaña. The results confirmed that sun photometry is a valid technique for aerosol monitoring in the pristine atmospheric turbidity conditions usually observed at high latitudes. The Italian research activity was supported by the Programma Nazionale di Ricerche in Antartide (PNRA) and developed as a part of Subproject 2006/6.01: “POLAR-AOD: a network to characterize the means, variability and trends of the climate-forcing properties of aerosols in polar regions”. The GOA-UVA group was ... |
format |
Article in Journal/Newspaper |
author |
Mazzola, Mauro Stone, Robert S. Herber, Andreas Tomasi, Claudio Lupi, Angelo Vitale, Vito Lanconelli, Christian Toledano, Carlos Cachorro, Victoria E. O'Neill, Norman T. Shiobara, Masataka Aaltonen, Veijo Stebel, Kerstin Zielinski, Tymon Petelski, Tomasz Ortiz de Galisteo, José Pablo Torres, Benjamín Berjón, Alberto Goloub, Philippe Li, Z. Blarel, Luc Abboud, Ihab Cuevas Agulló, Emilio Stock, Maria Schulz, Karl-Heinz Virkkula, Aki |
author_facet |
Mazzola, Mauro Stone, Robert S. Herber, Andreas Tomasi, Claudio Lupi, Angelo Vitale, Vito Lanconelli, Christian Toledano, Carlos Cachorro, Victoria E. O'Neill, Norman T. Shiobara, Masataka Aaltonen, Veijo Stebel, Kerstin Zielinski, Tymon Petelski, Tomasz Ortiz de Galisteo, José Pablo Torres, Benjamín Berjón, Alberto Goloub, Philippe Li, Z. Blarel, Luc Abboud, Ihab Cuevas Agulló, Emilio Stock, Maria Schulz, Karl-Heinz Virkkula, Aki |
author_sort |
Mazzola, Mauro |
title |
Evaluation of sun photometer capabilities for retrievals of aerosol optical depth at high latitudes: the POLAR-AOD intercomparison campaigns |
title_short |
Evaluation of sun photometer capabilities for retrievals of aerosol optical depth at high latitudes: the POLAR-AOD intercomparison campaigns |
title_full |
Evaluation of sun photometer capabilities for retrievals of aerosol optical depth at high latitudes: the POLAR-AOD intercomparison campaigns |
title_fullStr |
Evaluation of sun photometer capabilities for retrievals of aerosol optical depth at high latitudes: the POLAR-AOD intercomparison campaigns |
title_full_unstemmed |
Evaluation of sun photometer capabilities for retrievals of aerosol optical depth at high latitudes: the POLAR-AOD intercomparison campaigns |
title_sort |
evaluation of sun photometer capabilities for retrievals of aerosol optical depth at high latitudes: the polar-aod intercomparison campaigns |
publisher |
Elsevier |
publishDate |
2012 |
url |
https://hdl.handle.net/20.500.11765/11692 |
geographic |
Arctic Antarctic Svalbard Ny-Ålesund |
geographic_facet |
Arctic Antarctic Svalbard Ny-Ålesund |
genre |
Antarc* Antarctic Antartide Arctic IPY Ny Ålesund Ny-Ålesund Svalbard |
genre_facet |
Antarc* Antarctic Antartide Arctic IPY Ny Ålesund Ny-Ålesund Svalbard |
op_relation |
https://dx.doi.org/10.1016/j.atmosenv.2011.07.042 Atmospheric Environment. 2012, 52, p. 4-17 1352-2310 http://hdl.handle.net/20.500.11765/11692 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/20.500.11765/1169210.1016/j.atmosenv.2011.07.042 |
container_title |
Atmospheric Environment |
container_volume |
52 |
container_start_page |
4 |
op_container_end_page |
17 |
_version_ |
1802650338668314624 |