Articles | Volume 13, issue 10
https://doi.org/10.5194/essd-13-4929-2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/essd-13-4929-2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Advanced NO2 retrieval technique for the Brewer spectrophotometer applied to the 20-year record in Rome, Italy
Regional Environmental Protection Agency (ARPA) of the Aosta Valley, Saint-Christophe, Italy
Anna Maria Siani
Department of Physics, Sapienza University of Rome, Rome, Italy
Stefano Casadio
Serco Italia, Frascati, Rome, Italy
Anna Maria Iannarelli
Serco Italia, Frascati, Rome, Italy
Giuseppe Rocco Casale
Department of Physics, Sapienza University of Rome, Rome, Italy
now: independent researcher
Vladimir Savastiouk
International Ozone Services Inc., Toronto, Ontario, Canada
Alexander Cede
LuftBlick, Innsbruck, Austria
NASA Goddard Space Flight Center, Greenbelt, USA
Martin Tiefengraber
LuftBlick, Innsbruck, Austria
Department of Atmospheric and Cryospheric Sciences, University of Innsbruck, Innsbruck, Austria
Moritz Müller
LuftBlick, Innsbruck, Austria
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Elena Spinei, Martin Tiefengraber, Moritz Müller, Manuel Gebetsberger, Alexander Cede, Luke Valin, James Szykman, Andrew Whitehill, Alexander Kotsakis, Fernando Santos, Nader Abbuhasan, Xiaoyi Zhao, Vitali Fioletov, Sum Chi Lee, and Robert Swap
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Tijl Verhoelst, Steven Compernolle, Gaia Pinardi, Jean-Christopher Lambert, Henk J. Eskes, Kai-Uwe Eichmann, Ann Mari Fjæraa, José Granville, Sander Niemeijer, Alexander Cede, Martin Tiefengraber, François Hendrick, Andrea Pazmiño, Alkiviadis Bais, Ariane Bazureau, K. Folkert Boersma, Kristof Bognar, Angelika Dehn, Sebastian Donner, Aleksandr Elokhov, Manuel Gebetsberger, Florence Goutail, Michel Grutter de la Mora, Aleksandr Gruzdev, Myrto Gratsea, Georg H. Hansen, Hitoshi Irie, Nis Jepsen, Yugo Kanaya, Dimitris Karagkiozidis, Rigel Kivi, Karin Kreher, Pieternel F. Levelt, Cheng Liu, Moritz Müller, Monica Navarro Comas, Ankie J. M. Piters, Jean-Pierre Pommereau, Thierry Portafaix, Cristina Prados-Roman, Olga Puentedura, Richard Querel, Julia Remmers, Andreas Richter, John Rimmer, Claudia Rivera Cárdenas, Lidia Saavedra de Miguel, Valery P. Sinyakov, Wolfgang Stremme, Kimberly Strong, Michel Van Roozendael, J. Pepijn Veefkind, Thomas Wagner, Folkard Wittrock, Margarita Yela González, and Claus Zehner
Atmos. Meas. Tech., 14, 481–510, https://doi.org/10.5194/amt-14-481-2021, https://doi.org/10.5194/amt-14-481-2021, 2021
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This paper reports on the ground-based validation of the NO2 data produced operationally by the TROPOMI instrument on board the Sentinel-5 Precursor satellite. Tropospheric, stratospheric, and total NO2 columns are compared to measurements collected from MAX-DOAS, ZSL-DOAS, and PGN/Pandora instruments respectively. The products are found to satisfy mission requirements in general, though negative mean differences are found at sites with high pollution levels. Potential causes are discussed.
Jan-Lukas Tirpitz, Udo Frieß, François Hendrick, Carlos Alberti, Marc Allaart, Arnoud Apituley, Alkis Bais, Steffen Beirle, Stijn Berkhout, Kristof Bognar, Tim Bösch, Ilya Bruchkouski, Alexander Cede, Ka Lok Chan, Mirjam den Hoed, Sebastian Donner, Theano Drosoglou, Caroline Fayt, Martina M. Friedrich, Arnoud Frumau, Lou Gast, Clio Gielen, Laura Gomez-Martín, Nan Hao, Arjan Hensen, Bas Henzing, Christian Hermans, Junli Jin, Karin Kreher, Jonas Kuhn, Johannes Lampel, Ang Li, Cheng Liu, Haoran Liu, Jianzhong Ma, Alexis Merlaud, Enno Peters, Gaia Pinardi, Ankie Piters, Ulrich Platt, Olga Puentedura, Andreas Richter, Stefan Schmitt, Elena Spinei, Deborah Stein Zweers, Kimberly Strong, Daan Swart, Frederik Tack, Martin Tiefengraber, René van der Hoff, Michel van Roozendael, Tim Vlemmix, Jan Vonk, Thomas Wagner, Yang Wang, Zhuoru Wang, Mark Wenig, Matthias Wiegner, Folkard Wittrock, Pinhua Xie, Chengzhi Xing, Jin Xu, Margarita Yela, Chengxin Zhang, and Xiaoyi Zhao
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Multi-axis differential optical absorption spectroscopy (MAX-DOAS) is a ground-based remote sensing measurement technique that derives atmospheric aerosol and trace gas vertical profiles from skylight spectra. In this study, consistency and reliability of MAX-DOAS profiles are assessed by applying nine different evaluation algorithms to spectral data recorded during an intercomparison campaign in the Netherlands and by comparing the results to colocated supporting observations.
Kaisa Lakkala, Jukka Kujanpää, Colette Brogniez, Nicolas Henriot, Antti Arola, Margit Aun, Frédérique Auriol, Alkiviadis F. Bais, Germar Bernhard, Veerle De Bock, Maxime Catalfamo, Christine Deroo, Henri Diémoz, Luca Egli, Jean-Baptiste Forestier, Ilias Fountoulakis, Katerina Garane, Rosa Delia Garcia, Julian Gröbner, Seppo Hassinen, Anu Heikkilä, Stuart Henderson, Gregor Hülsen, Bjørn Johnsen, Niilo Kalakoski, Angelos Karanikolas, Tomi Karppinen, Kevin Lamy, Sergio F. León-Luis, Anders V. Lindfors, Jean-Marc Metzger, Fanny Minvielle, Harel B. Muskatel, Thierry Portafaix, Alberto Redondas, Ricardo Sanchez, Anna Maria Siani, Tove Svendby, and Johanna Tamminen
Atmos. Meas. Tech., 13, 6999–7024, https://doi.org/10.5194/amt-13-6999-2020, https://doi.org/10.5194/amt-13-6999-2020, 2020
Short summary
Short summary
The TROPOspheric Monitoring Instrument (TROPOMI) onboard the Sentinel-5 Precursor (S5P) satellite was launched on 13 October 2017 to provide the atmospheric composition for atmosphere and climate research. Ground-based data from 25 sites located in Arctic, subarctic, temperate, equatorial and Antarctic
areas were used for the validation of the TROPOMI surface ultraviolet (UV) radiation product. For most sites 60 %–80 % of TROPOMI data was within ± 20 % of ground-based data.
Gaia Pinardi, Michel Van Roozendael, François Hendrick, Nicolas Theys, Nader Abuhassan, Alkiviadis Bais, Folkert Boersma, Alexander Cede, Jihyo Chong, Sebastian Donner, Theano Drosoglou, Anatoly Dzhola, Henk Eskes, Udo Frieß, José Granville, Jay R. Herman, Robert Holla, Jari Hovila, Hitoshi Irie, Yugo Kanaya, Dimitris Karagkiozidis, Natalia Kouremeti, Jean-Christopher Lambert, Jianzhong Ma, Enno Peters, Ankie Piters, Oleg Postylyakov, Andreas Richter, Julia Remmers, Hisahiro Takashima, Martin Tiefengraber, Pieter Valks, Tim Vlemmix, Thomas Wagner, and Folkard Wittrock
Atmos. Meas. Tech., 13, 6141–6174, https://doi.org/10.5194/amt-13-6141-2020, https://doi.org/10.5194/amt-13-6141-2020, 2020
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We validate several GOME-2 and OMI tropospheric NO2 products with 23 MAX-DOAS and 16 direct sun instruments distributed worldwide, highlighting large horizontal inhomogeneities at several sites affecting the validation results. We propose a method for quantification and correction. We show the application of such correction reduces the satellite underestimation in almost all heterogeneous cases, but a negative bias remains over the MAX-DOAS and direct sun network ensemble for both satellites.
Laura M. Judd, Jassim A. Al-Saadi, James J. Szykman, Lukas C. Valin, Scott J. Janz, Matthew G. Kowalewski, Henk J. Eskes, J. Pepijn Veefkind, Alexander Cede, Moritz Mueller, Manuel Gebetsberger, Robert Swap, R. Bradley Pierce, Caroline R. Nowlan, Gonzalo González Abad, Amin Nehrir, and David Williams
Atmos. Meas. Tech., 13, 6113–6140, https://doi.org/10.5194/amt-13-6113-2020, https://doi.org/10.5194/amt-13-6113-2020, 2020
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This paper evaluates Sentinel-5P TROPOMI v1.2 NO2 tropospheric columns over New York City using data from airborne mapping spectrometers and a network of ground-based spectrometers (Pandora) collected in 2018. These evaluations consider impacts due to cloud parameters, a priori profile assumptions, and spatial and temporal variability. Overall, TROPOMI tropospheric NO2 columns appear to have a low bias in this region.
Ilias Fountoulakis, Henri Diémoz, Anna Maria Siani, Gregor Hülsen, and Julian Gröbner
Earth Syst. Sci. Data, 12, 2787–2810, https://doi.org/10.5194/essd-12-2787-2020, https://doi.org/10.5194/essd-12-2787-2020, 2020
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In this study we discuss the procedures and the technical aspects which ensure the high quality of the measurements of the global solar ultraviolet (UV) irradiance performed by a Bentham spectroradiometer located at Aosta–Saint-Christophe (north-western Alps), Italy. This particular instrument is the reference for the Aosta Valley UV monitoring network, which is the first UV monitoring network in Italy. The final spectra constitute one of the most accurate datasets globally.
Cited articles
Aliwell, S. R., Van Roozendael, M., Johnston, P. V., Richter, A., Wagner, T., Arlander, D. W., Burrows, J. P., Fish, D. J., Jones, R. L., and Tørnkvist, K. K., Lambert, J.-C., Pfeilsticker, K., and Pundt, I.:
Analysis for BrO in zenith-sky spectra: An intercomparison exercise for
analysis improvement, J. Geophys. Res., 107, ACH 10–1–ACH 10–20,
https://doi.org/10.1029/2001JD000329, 2002. a, b, c
ARPA Lazio: Concentrazione media del biossido di azoto (NO2), Tech. rep., available at: http://www.arpalazio.gov.it/ambiente/indicatori/doc/concentrazione_NO2_2019.pdf (last access: 17 October 2021),
2020 (in Italian). a
ARPA Lazio: Monitoraggio della qualità dell'aria della regione Lazio,
Valutazione preliminare anno 2020, Tech. rep.,
https://www.arpalazio.it/documents/20124/55931/MonitoraggioAria2020_Rapporto+Preliminare.pdf (last access: 17 October 2021),
2021 (in Italian). a
Bassani, C., Vichi, F., Esposito, G., Montagnoli, M., Giusto, M., and
Ianniello, A.: Nitrogen dioxide reductions from satellite and surface
observations during COVID-19 mitigation in Rome (Italy), Environ. Sci.
Pollut. R., 28, 22981–23004, https://doi.org/10.1007/s11356-020-12141-9, 2021. a, b
Bates, D. and Hays, P.: Atmospheric nitrous oxide, Planet. Space Sci., 15,
189–197, https://doi.org/10.1016/0032-0633(67)90074-8, 1967. a
Bell, J. N. B. and Treshow, M.: Air pollution and plant life, John Wiley &
Sons, Chichester, West Sussex, England, 2002. a
Bodhaine, B. A., Wood, N. B., Dutton, E. G., and Slusser, J. R.: On Rayleigh
optical depth calculations, J. Atmos. Ocean. Tech., 16, 1854–1861,
https://doi.org/10.1175/1520-0426(1999)016<1854:ORODC>2.0.CO;2, 1999. a, b
Boersma, K. F.: Error analysis for tropospheric NO2 retrieval from space, J.
Geophys. Res., 109, D04311, https://doi.org/10.1029/2003JD003962, 2004. a
Bogumil, K., Orphal, J., Homann, T., Voigt, S., Spietz, P., Fleischmann, O.,
Vogel, A., Hartmann, M., Kromminga, H., Bovensmann, H., Frerick, J., and
Burrows, J.: Measurements of molecular absorption spectra with the SCIAMACHY
pre-flight model: instrument characterization and reference data for
atmospheric remote-sensing in the 230–2380 nm region, J. Photoch. Photobio.
A, 157, 167–184, https://doi.org/10.1016/S1010-6030(03)00062-5, 2003. a
Bösch, T., Rozanov, V., Richter, A., Peters, E., Rozanov, A., Wittrock, F., Merlaud, A., Lampel, J., Schmitt, S., de Haij, M., Berkhout, S., Henzing, B., Apituley, A., den Hoed, M., Vonk, J., Tiefengraber, M., Müller, M., and Burrows, J. P.: BOREAS – a new MAX-DOAS profile retrieval algorithm for aerosols and trace gases, Atmos. Meas. Tech., 11, 6833–6859, https://doi.org/10.5194/amt-11-6833-2018, 2018. a
Brewer, A. W. and McElroy, C. T.: Nitrogen dioxide concentrations in the
atmosphere, Nature, 246, 129–133, https://doi.org/10.1038/246129a0, 1973. a
Campanelli, M., Siani, A. M., di Sarra, A., Iannarelli, A. M., Sanò, P., Diémoz, H., Casasanta, G., Cacciani, M., Tofful, L., and Dietrich, S.: Aerosol optical characteristics in the urban area of Rome, Italy, and their impact on the UV index, Atmos. Meas. Tech. Discuss. [preprint], https://doi.org/10.5194/amt-2019-300, in review, 2019. a
Campanelli, M., Iannarelli, A., Mevi, G., Casadio, S., Diémoz, H., Finardi,
S., Dinoi, A., Castelli, E., di Sarra, A., Di Bernardino, A., Casasanta,
G., Bassani, C., Siani, A., Cacciani, M., Barnaba, F., Di Liberto, L., and
Argentini, S.: A wide-ranging investigation of the COVID-19 lockdown effects
on the atmospheric composition in various Italian urban sites (AER –
LOCUS), Urban Clim., 39, 100954, https://doi.org/10.1016/j.uclim.2021.100954, 2021. a
Castellanos, P. and Boersma, K. F.: Reductions in nitrogen oxides over Europe
driven by environmental policy and economic recession, Sci. Rep., 2,
265, https://doi.org/10.1038/srep00265, 2012. a
Cede, A.: Manual for Blick Software Suite, Manual version 1.7, Tech. rep.,
LuftBlick, available at:
https://www.pandonia-global-network.org/wp-content/uploads/2019/11/BlickSoftwareSuite_Manual_v1-7.pdf (last access: 17 October 2021),
2019. a
Cede, A., Herman, J., Richter, A., Krotkov, N., and Burrows, J.: Measurements
of nitrogen dioxide total column amounts using a Brewer double
spectrophotometer in direct Sun mode, J. Geophys. Res., 111, D05304,
https://doi.org/10.1029/2005JD006585, 2006. a, b
Cede, A., Tiefengraber, M., Gebetsberger, M., and Spinei Lind, E.: Pandonia
Global Network Data Products Readme Document, Version 1.8-3, Tech. rep., available at: https://www.pandonia-global-network.org/wp-content/uploads/2021/01/PGN_DataProducts_Readme_v1-8-3.pdf (last access: 17 October 2021),
2021. a, b
Celarier, E. A., Brinksma, E. J., Gleason, J. F., Veefkind, J. P., Cede, A.,
Herman, J. R., Ionov, D., Goutail, F., Pommereau, J.-P., Lambert, J.-C., van
Roozendael, M., Pinardi, G., Wittrock, F., Schönhardt, A., Richter, A.,
Ibrahim, O. W., Wagner, T., Bojkov, B., Mount, G., Spinei, E., Chen, C. M.,
Pongetti, T. J., Sander, S. P., Bucsela, E. J., Wenig, M. O., Swart, D.
P. J., Volten, H., Kroon, M., and Levelt, P. F.: Validation of Ozone
Monitoring Instrument nitrogen dioxide columns, J. Geophys. Res., 113, D15S15,
https://doi.org/10.1029/2007JD008908, 2008. a
Chartrand, D. J., de Grandpré, J., and McConnell, J. C.: An introduction to
stratospheric chemistry: Survey article, Atmos. Ocean, 37, 309–367,
https://doi.org/10.1080/07055900.1999.9649631, 1999. a
Crutzen, P. J.: The influence of nitrogen oxides on the atmospheric ozone
content, Q. J. Roy. Meteor. Soc., 96, 320–325, https://doi.org/10.1002/qj.49709640815,
1970. a
Di Bernardino, A., Iannarelli, A. M., Casadio, S., Mevi, G., Campanelli, M.,
Casasanta, G., Cede, A., Tiefengraber, M., Siani, A. M., Spinei, E., and
Cacciani, M.: On the effect of sea breeze regime on aerosols and gases
properties in the urban area of Rome, Italy, Urban Clim., 37, 100842,
https://doi.org/10.1016/j.uclim.2021.100842, 2021a. a
Di Bernardino, A., Iannarelli, A. M., Casadio, S., Perrino, C., Barnaba, F.,
Tofful, L., Campanelli, M., Di Liberto, L., Mevi, G., Siani, A. M., and
Cacciani, M.: Impact of synoptic meteorological conditions on air quality in
three different case studies in Rome, Italy, Atmos. Pollut. Res., 12, 76–88,
https://doi.org/10.1016/j.apr.2021.02.019, 2021b. a
Diémoz, H., Campanelli, M., and Estellés, V.: One Year of Measurements with
a POM-02 Sky Radiometer at an Alpine EuroSkyRad Station, J. Meteorol. Soc.
Jpn., 92A, 1–16, https://doi.org/10.2151/jmsj.2014-A01, 2014a. a
Diémoz, H., Siani, A. M., Redondas, A., Savastiouk, V., McElroy, C. T., Navarro-Comas, M., and Hase, F.: Improved retrieval of nitrogen dioxide (NO2) column densities by means of MKIV Brewer spectrophotometers, Atmos. Meas. Tech., 7, 4009–4022, https://doi.org/10.5194/amt-7-4009-2014, 2014b. a, b, c, d
Diémoz, H., Eleftheratos, K., Kazadzis, S., Amiridis, V., and Zerefos, C. S.: Retrieval of aerosol optical depth in the visible range with a Brewer spectrophotometer in Athens, Atmos. Meas. Tech., 9, 1871–1888, https://doi.org/10.5194/amt-9-1871-2016, 2016. a, b
Diémoz, H., Gobbi, G. P., Magri, T., Pession, G., Pittavino, S., Tombolato, I. K. F., Campanelli, M., and Barnaba, F.: Transport of Po Valley aerosol pollution to the northwestern Alps – Part 2: Long-term impact on air quality, Atmos. Chem. Phys., 19, 10129–10160, https://doi.org/10.5194/acp-19-10129-2019, 2019. a
Diémoz, H. and Siani, A. M.: Direct sun retrievals of nitrogen dioxide (NO2)
total columns from Brewer #067, Rome, Italy (reprocessed with algorithm
BNALG2), Zenodo [data set], https://doi.org/10.5281/zenodo.4715219, 2021. a, b
Diémoz, H., Magri, T., Pession, G., Tarricone, C., Tombolato, I. K. F.,
Fasano, G., and Zublena, M.: Air Quality in the Italian Northwestern Alps
during Year 2020: Assessment of the COVID-19 “Lockdown Effect” from
Multi-Technique Observations and Models, Atmosphere, 12, 1006
https://doi.org/10.3390/atmos12081006, 2021. a, b
Emde, C., Buras-Schnell, R., Kylling, A., Mayer, B., Gasteiger, J., Hamann, U., Kylling, J., Richter, B., Pause, C., Dowling, T., and Bugliaro, L.: The libRadtran software package for radiative transfer calculations (version 2.0.1), Geosci. Model Dev., 9, 1647–1672, https://doi.org/10.5194/gmd-9-1647-2016, 2016. a
Flynn, C. M., Pickering, K. E., Crawford, J. H., Lamsal, L., Krotkov, N.,
Herman, J., Weinheimer, A., Chen, G., Liu, X., Szykman, J., Tsay, S.-C.,
Loughner, C., Hains, J., Lee, P., Dickerson, R. R., Stehr, J. W., and Brent,
L.: Relationship between column-density and surface mixing ratio: Statistical
analysis of O3 and NO2 data from the July 2011 Maryland DISCOVER-AQ mission,
Atmos. Environ., 92, 429–441, https://doi.org/10.1016/j.atmosenv.2014.04.041, 2014. a
Fountoulakis, I., Diémoz, H., Siani, A. M., Hülsen, G., and Gröbner, J.: Monitoring of solar spectral ultraviolet irradiance in Aosta, Italy, Earth Syst. Sci. Data, 12, 2787–2810, https://doi.org/10.5194/essd-12-2787-2020, 2020. a
Francesconi, M., Casale, G., Siani, A., and Casadio, S.: Ground-based NO2
measurements at the Italian Brewer stations: a pilot study with Global Ozone
Monitoring Experiment (GOME), Nuovo Cimento C, 27,
383–392, https://doi.org/10.1393/ncc/i2004-10036-8, 2004. a
Garcia, R. R. and Solomon, S.: A new numerical model of the middle atmosphere:
2. Ozone and related species, J. Geophys. Res., 99, 12937–12951,
https://doi.org/10.1029/94JD00725, 1994. a
Griffin, D., Zhao, X., McLinden, C. A., Boersma, F., Bourassa, A., Dammers, E.,
Degenstein, D., Eskes, H., Fehr, L., Fioletov, V., Hayden, K., Kharol, S. K.,
Li, S.-M., Makar, P., Martin, R. V., Mihele, C., Mittermeier, R. L., Krotkov,
N., Sneep, M., Lamsal, L. N., Linden, M. t., Geffen, J. v., Veefkind, P., and
Wolde, M.: High-Resolution Mapping of Nitrogen Dioxide With TROPOMI: First
Results and Validation Over the Canadian Oil Sands, Geophys. Res. Lett., 46,
1049–1060, https://doi.org/10.1029/2018GL081095, 2019. a
Gruzdev, A. N.: Latitudinal structure of variations and trends in stratospheric
NO2, Int. J. Remote Sens., 30, 4227–4246, https://doi.org/10.1080/01431160902822815,
2009. a
Gruzdev, A. N. and Elokhov, A. S.: Changes in the Column Content and Vertical
Distribution of NO2 According to the Results of 30-Year Measurements at the
Zvenigorod Scientific Station of the A. M. Obukhov Institute of Atmospheric
Physics, Russian Academy of Sciences, Izv. Atmos. Ocean. Phy., 57, 91–103,
https://doi.org/10.1134/S0001433821010084, 2021. a
Haagen-Smit, A. J.: Chemistry and physiology of Los Angeles smog, Ind. Eng.
Chem., 44, 1342–1346, https://doi.org/10.1021/ie50510a045, 1952. a
Herman, J., Cede, A., Spinei, E., Mount, G., Tzortziou, M., and Abuhassan, N.:
NO2 column amounts from ground-based Pandora and MFDOAS spectrometers using
the direct-sun DOAS technique: Intercomparisons and application to OMI
validation, J. Geophys. Res., 114, D13307, https://doi.org/10.1029/2009JD011848, 2009. a, b, c, d, e
Herman, J., Abuhassan, N., Kim, J., Kim, J., Dubey, M., Raponi, M., and Tzortziou, M.: Underestimation of column NO2 amounts from the OMI satellite compared to diurnally varying ground-based retrievals from multiple PANDORA spectrometer instruments, Atmos. Meas. Tech., 12, 5593–5612, https://doi.org/10.5194/amt-12-5593-2019, 2019. a
Hermans, C., Vandaele, A. C., Fally, S., Carleer, M., Colin, R., Coquart, B.,
Jenouvrier, A., and Merienne, M.-F.: Absorption Cross-section of the
Collision-Induced Bands of Oxygen from the UV to the NIR, in: Weakly
Interacting Molecular Pairs: Unconventional Absorbers of Radiation in the
Atmosphere, edited by: Camy-Peyret, C. and Vigasin, A. A., pp. 193–202,
Springer Netherlands, Dordrecht, 2003. a, b, c
Hilboll, A., Richter, A., and Burrows, J. P.: Long-term changes of tropospheric NO2 over megacities derived from multiple satellite instruments, Atmos. Chem. Phys., 13, 4145–4169, https://doi.org/10.5194/acp-13-4145-2013, 2013. a
Hofmann, D., Bonasoni, P., De Maziere, M., Evangelisti, F., Giovanelli, G.,
Goldman, A., Goutail, F., Harder, J., Jakoubek, R., Johnston, P., Kerr, J.,
Matthews, W. A., McElroy, T., McKenzie, R., Mount, G., Platt, U., Pommereau,
J.-P., Sarkissian, A., Simon, P., Solomon, S., Stutz, J., Thomas, A.,
Van Roozendael, M., and Wu, E.: Intercomparison of UV/visible spectrometers
for measurements of stratospheric NO2 for the Network for the Detection of
Stratospheric Change, J. Geophys. Res., 100, 16765–16791,
https://doi.org/10.1029/95JD00620, 1995. a
Iannarelli, A. M., Di Bernardino, A., Casadio, S., Bassani, C., Cacciani, M., Campanelli, M., Casasanta, G., Cadau, E., Diémoz, H., Mevi, G., Siani, A. M., Cardaci, M., Dehn, A., and Goryl, P.: The Boundary-layer Air Quality-analysis Using Network of INstruments (BAQUNIN) supersite for Atmospheric Research and Satellite Validation over Rome area, B. Am. Meteorol. Soc., in review, 2021. a
Johnston, H. S. and Graham, P.: Unpublished absorption coefficients on NO2
and O3, Dept. of Chem., University of California, Berkeley, 1976. a
Judd, L. M., Al-Saadi, J. A., Janz, S. J., Kowalewski, M. G., Pierce, R. B., Szykman, J. J., Valin, L. C., Swap, R., Cede, A., Mueller, M., Tiefengraber, M., Abuhassan, N., and Williams, D.: Evaluating the impact of spatial resolution on tropospheric NO2 column comparisons within urban areas using high-resolution airborne data, Atmos. Meas. Tech., 12, 6091–6111, https://doi.org/10.5194/amt-12-6091-2019, 2019. a
Kerr, J. B.: New methodology for deriving total ozone and other atmospheric
variables from Brewer spectrophotometer direct sun spectra, J. Geophys. Res.,
107, ACH 22-1–ACH 22-17, https://doi.org/10.1029/2001JD001227, 2002. a
Kerr, J. B., Evans, W. F. J., and McConnell, J. C.: The effects of NO2 changes
at twilight on tangent ray NO2 measurements, Geophys. Res. Lett., 4,
577–579, https://doi.org/10.1029/GL004i012p00577, 1977. a
Kipp & Zonen: Brewer MKIV – Operator's Manual for Single Board, available at: https://www.kippzonen.com/Download/164/Brewer-MKIV-Operator-s-Manual-for-Single-Board (last access: 17 October 2021),
2007. a
Krzyzanowski, M. and Cohen, A.: Update of WHO air quality guidelines, Air Qual.
Atmos. Hlth., 1, 7–13, https://doi.org/10.1007/s11869-008-0008-9, 2008. a
Lamsal, L. N., Janz, S. J., Krotkov, N. A., Pickering, K. E., Spurr, R. J. D.,
Kowalewski, M. G., Loughner, C. P., Crawford, J. H., Swartz, W. H., and
Herman, J. R.: High-resolution NO2 observations from the Airborne Compact
Atmospheric Mapper: Retrieval and validation, J. Geophys. Res., 122,
1953–1970, https://doi.org/10.1002/2016JD025483, 2017. a
Langley, S. P.: The “solar constant” and related problems, Astrophys. J., 17,
89–99, https://doi.org/10.1086/140999, 1903. a
Lee, D., Köhler, I., Grobler, E., Rohrer, F., Sausen, R., Gallardo-Klenner,
L., Olivier, J., Dentener, F., and Bouwman, A.: Estimations of global no,
emissions and their uncertainties, Atmos. Environ., 31, 1735–1749,
https://doi.org/10.1016/S1352-2310(96)00327-5, 1997. a
Leitão, J., Richter, A., Vrekoussis, M., Kokhanovsky, A., Zhang, Q. J., Beekmann, M., and Burrows, J. P.: On the improvement of NO2 satellite retrievals – aerosol impact on the airmass factors, Atmos. Meas. Tech., 3, 475–493, https://doi.org/10.5194/amt-3-475-2010, 2010. a
Macdonald, E., Otero, N., and Butler, T.: A comparison of long-term trends in observations and emission inventories of NOx, Atmos. Chem. Phys., 21, 4007–4023, https://doi.org/10.5194/acp-21-4007-2021, 2021. a
Martins, D. K., Najjar, R. G., Tzortziou, M., Abuhassan, N., Thompson, A. M.,
and Kollonige, D. E.: Spatial and temporal variability of ground and
satellite column measurements of NO2 and O3 over the Atlantic Ocean during
the Deposition of Atmospheric Nitrogen to Coastal Ecosystems Experiment, J.
Geophys. Res., 121, 14175–14187, https://doi.org/10.1002/2016JD024998, 2016. a
McElroy, C., Elokhov, A., Elansky, N., Frank, H., Johnston, P., and Kerr, J.:
Visible light nitrogen dioxide spectrophotometer intercomparison: Mount
Kobau, British Columbia, July 28 to August 10, 1991, NASA Goddard Space
Flight Center, Ozone in the Troposphere and Stratosphere, Part 2, 663–666
(SEE N 95-11006 01-47), available at: https://ntrs.nasa.gov/api/citations/19950004593/downloads/19950004593.pdf (last access: 17 October 2021), 1994. a
Meloni, D., Casale, G. R., Siani, A. M., Palmieri, S., and Cappellani, F.:
Solar UV Dose Patterns in Italy, Photochem. Photobiol., 71, 681–690,
https://doi.org/10.1562/0031-8655(2000)0710681SUDPII2.0.CO2, 2000. a
Müller, M., Gebetsberger, M., Tiefengraber, M., and Cede, A.: LuftBlick Report
2019003, Fiducial Reference Measurementsfor Air Quality, Calibration
Procedures Document, Tech. rep., LuftBlick, available at:
https://www.pandonia-global-network.org/wp-content/uploads/2021/01/LuftBlick_FRM4AQ_CPD_RP_2019003_v4.0.pdf (last access: 17 October 2021),
2020. a
Municipality of Rome: Inquinamento atmosferico, Analisi dei principali dati
sulla qualità dell'aria a Roma, 2015, Tech. rep., available at:
https://www.comune.roma.it/web-resources/cms/documents/REV_Report_aria_2015_X.pdf (last access: 17 October 2021),
2017 (in Italian). a
Noxon, J. F.: Nitrogen Dioxide in the Stratosphere and Troposphere Measured by
Ground-Based Absorption Spectroscopy, Science, 189, 547–549,
https://doi.org/10.1126/science.189.4202.547, 1975. a
Petritoli, A., Bonasoni, P., Giovanelli, G., Ravegnani, F., Kostadinov, I.,
Bortoli, D., Weiss, A., Schaub, D., Richter, A., and Fortezza, F.: First
comparison between ground-based and satellite-borne measurements of
tropospheric nitrogen dioxide in the Po basin, J. Geophys. Res., 109, D15307,
https://doi.org/10.1029/2004JD004547, 2004. a
Portmann, R. W., Brown, S. S., Gierczak, T., Talukdar, R. K., Burkholder,
J. B., and Ravishankara, A. R.: Role of nitrogen oxides in the stratosphere:
A reevaluation based on laboratory studies, Geophys. Res. Lett., 26,
2387–2390, https://doi.org/10.1029/1999GL900499, 1999. a
Redondas, A., Carreño, V., León-Luis, S. F., Hernández-Cruz, B., López-Solano, J., Rodriguez-Franco, J. J., Vilaplana, J. M., Gröbner, J., Rimmer, J., Bais, A. F., Savastiouk, V., Moreta, J. R., Boulkelia, L., Jepsen, N., Wilson, K. M., Shirotov, V., and Karppinen, T.: EUBREWNET RBCC-E Huelva 2015 Ozone Brewer Intercomparison, Atmos. Chem. Phys., 18, 9441–9455, https://doi.org/10.5194/acp-18-9441-2018, 2018. a
Reed, A. J., Thompson, A. M., Kollonige, D. E., Martins, D. K., Tzortziou,
M. A., Herman, J. R., Berkoff, T. A., Abuhassan, N. K., and Cede, A.: Effects
of local meteorology and aerosols on ozone and nitrogen dioxide retrievals
from OMI and pandora spectrometers in Maryland, USA during DISCOVER-AQ 2011,
J. Atmos. Chem., 72, 455–482, https://doi.org/10.1007/s10874-013-9254-9, 2015. a
Richter, A., Burrows, J. P., Nüß, H., Granier, C., and Niemeier, U.:
Increase in tropospheric nitrogen dioxide over China observed from space,
Nature, 437, 129–132, https://doi.org/10.1038/nature04092, 2005. a
Rimmer, J. S., Redondas, A., and Karppinen, T.: EuBrewNet – A European Brewer network (COST Action ES1207), an overview, Atmos. Chem. Phys., 18, 10347–10353, https://doi.org/10.5194/acp-18-10347-2018, 2018. a
Rothman, L. S., Gordon, I. E., Barbe, A., Benner, D. C., Bernath, P. F., Birk, M., Boudon, V.,
Brown, L. R., Campargue, A., Champion, J.-P., Chance, K., Coudert, L. H., Dana, V., Devi, V. M., Fally, S., Flaud, J.-M., Gamache, R. R., Goldman, A., Jacquemart, D., Kleiner, I., Lacome, N., Lafferty, W. J., Mandin, J.-Y., Massie, S. T., Mikhailenko, S. N., Miller, C. E., Moazzen-Ahmadi, N., Naumenko, O. V., Nikitin, A. V., Orphal, J., Perevalov, V. I., Perrin, A., Predoi-Cross, A., Rinsland, C. P., Rotger, M., Šimečková, M., Smith, M. A. H., Sung, K., Tashkun, S. A., Tennyson, J., Toth, R. A., Vandaele, A. C., and Vander Auwera, J.: The
HITRAN 2008 molecular spectroscopic database, J. Quant. Spectrosc. Ra.,
110, 533–572, https://doi.org/10.1016/j.jqsrt.2009.02.013, 2009. a
Russell, A. R., Valin, L. C., and Cohen, R. C.: Trends in OMI NO2 observations over the United States: effects of emission control technology and the economic recession, Atmos. Chem. Phys., 12, 12197–12209, https://doi.org/10.5194/acp-12-12197-2012, 2012. a
Schumann, U. and Huntrieser, H.: The global lightning-induced nitrogen oxides source, Atmos. Chem. Phys., 7, 3823–3907, https://doi.org/10.5194/acp-7-3823-2007, 2007. a
Seinfeld, J. H. and Pandis, S. N.: Atmospheric Chemistry and Physics: From Air
Pollution to Climate Change, 2nd edn., John Wiley & Sons, New York, 2006. a
Shaw, G. E.: Nitrogen dioxide–optical absorption in the visible, J. Geophys.
Res., 81, 5791–5792, https://doi.org/10.1029/JC081i033p05791, 1976. a
Siani, A. M., Frasca, F., Scarlatti, F., Religi, A., Diémoz, H., Casale, G. R., Pedone, M., and Savastiouk, V.: Examination on total ozone column retrievals by Brewer spectrophotometry using different processing software, Atmos. Meas. Tech., 11, 5105–5123, https://doi.org/10.5194/amt-11-5105-2018, 2018. a, b, c, d
Solomon, S., Portmann, R. W., Sanders, R. W., Daniel, J. S., Madsen, W.,
Bartram, B., and Dutton, E. G.: On the role of nitrogen dioxide in the
absorption of solar radiation, J. Geophys. Res., 104, 12047–12058,
https://doi.org/10.1029/1999JD900035, 1999. a
Tirpitz, J.-L., Frieß, U., Hendrick, F., Alberti, C., Allaart, M., Apituley, A., Bais, A., Beirle, S., Berkhout, S., Bognar, K., Bösch, T., Bruchkouski, I., Cede, A., Chan, K. L., den Hoed, M., Donner, S., Drosoglou, T., Fayt, C., Friedrich, M. M., Frumau, A., Gast, L., Gielen, C., Gomez-Martín, L., Hao, N., Hensen, A., Henzing, B., Hermans, C., Jin, J., Kreher, K., Kuhn, J., Lampel, J., Li, A., Liu, C., Liu, H., Ma, J., Merlaud, A., Peters, E., Pinardi, G., Piters, A., Platt, U., Puentedura, O., Richter, A., Schmitt, S., Spinei, E., Stein Zweers, D., Strong, K., Swart, D., Tack, F., Tiefengraber, M., van der Hoff, R., van Roozendael, M., Vlemmix, T., Vonk, J., Wagner, T., Wang, Y., Wang, Z., Wenig, M., Wiegner, M., Wittrock, F., Xie, P., Xing, C., Xu, J., Yela, M., Zhang, C., and Zhao, X.: Intercomparison of MAX-DOAS vertical profile retrieval algorithms: studies on field data from the CINDI-2 campaign, Atmos. Meas. Tech., 14, 1–35, https://doi.org/10.5194/amt-14-1-2021, 2021. a
Vandaele, A., Hermans, C., Simon, P., Carleer, M., Colin, R., Fally, S.,
Mérienne, M., Jenouvrier, A., and Coquart, B.: Measurements of the NO2
absorption cross-section from 42 000 cm−1 to 10 000 cm−1 (238–1000 nm) at 220 K and 294 K, J. Quant. Spectrosc. Ra., 59, 171–184,
https://doi.org/10.1016/S0022-4073(97)00168-4, 1998. a
Vandaele, A. C., Hermans, C., Fally, S., Carleer, M., Colin, R., Mérienne,
M.-F., Jenouvrier, A., and Coquart, B.: High-resolution Fourier transform
measurement of the NO2 visible and near-infrared absorption cross sections:
Temperature and pressure effects, J. Geophys. Res., 107, ACH 3-1–ACH 3-12,
https://doi.org/10.1029/2001JD000971, 2002. a, b, c
Verhoelst, T., Compernolle, S., Pinardi, G., Lambert, J.-C., Eskes, H. J., Eichmann, K.-U., Fjæraa, A. M., Granville, J., Niemeijer, S., Cede, A., Tiefengraber, M., Hendrick, F., Pazmiño, A., Bais, A., Bazureau, A., Boersma, K. F., Bognar, K., Dehn, A., Donner, S., Elokhov, A., Gebetsberger, M., Goutail, F., Grutter de la Mora, M., Gruzdev, A., Gratsea, M., Hansen, G. H., Irie, H., Jepsen, N., Kanaya, Y., Karagkiozidis, D., Kivi, R., Kreher, K., Levelt, P. F., Liu, C., Müller, M., Navarro Comas, M., Piters, A. J. M., Pommereau, J.-P., Portafaix, T., Prados-Roman, C., Puentedura, O., Querel, R., Remmers, J., Richter, A., Rimmer, J., Rivera Cárdenas, C., Saavedra de Miguel, L., Sinyakov, V. P., Stremme, W., Strong, K., Van Roozendael, M., Veefkind, J. P., Wagner, T., Wittrock, F., Yela González, M., and Zehner, C.: Ground-based validation of the Copernicus Sentinel-5P TROPOMI NO2 measurements with the NDACC ZSL-DOAS, MAX-DOAS and Pandonia global networks, Atmos. Meas. Tech., 14, 481–510, https://doi.org/10.5194/amt-14-481-2021, 2021. a
Vigroux, E.: Absorption de l'ozone dans le spectre visible, Compt. Rend. Acad.
Sci. Paris, 235, 149–150, 1952. a
Vitt, R., Laschewski, G., Bais, A. F., Diémoz, H., Fountoulakis, I., Siani,
A.-M., and Matzarakis, A.: UV-Index Climatology for Europe Based on Satellite
Data, Atmosphere, 11, 727, https://doi.org/10.3390/atmos11070727, 2020.
a
Vrekoussis, M., Richter, A., Hilboll, A., Burrows, J. P., Gerasopoulos, E.,
Lelieveld, J., Barrie, L., Zerefos, C., and Mihalopoulos, N.: Economic crisis
detected from space: Air quality observations over Athens/Greece, Geophys.
Res. Lett., 40, 458–463, https://doi.org/10.1002/grl.50118, 2013. a
Wang, S., Pongetti, T. J., Sander, S. P., Spinei, E., Mount, G. H., Cede, A.,
and Herman, J.: Direct Sun measurements of NO2 column abundances from Table
Mountain, California: Intercomparison of low- and high-resolution
spectrometers, J. Geophys. Res., 115, D13305, https://doi.org/10.1029/2009JD013503, 2010. a
Wang, S., Li, K.-F., Zhu, D., Sander, S. P., Yung, Y. L., Pazmino, A., and
Querel, R.: Solar 11-Year Cycle Signal in Stratospheric Nitrogen
Dioxide – Similarities and Discrepancies Between Model and NDACC
Observations, Sol. Phys., 295, 117, https://doi.org/10.1007/s11207-020-01685-1, 2020. a
Werner, R., Valev, D., Atanassov, A., Guineva, V., and Kirillov, A.: Analysis
of variations and trends of the NO2 slant column abundance obtained by DOAS
measurements at Stara Zagora and at NDACC European mid-latitude stations in
comparison with subtropical stations, J. Atmos. Sol.-Terr. Phy., 99,
134–142, https://doi.org/10.1016/j.jastp.2013.01.016, 2013. a
Zhou, L., Wang, W., Hou, S., Tong, S., and Ge, M.: Heterogeneous uptake of
nitrogen dioxide on Chinese mineral dust, J. Environ. Sci., 38, 110–118,
https://doi.org/10.1016/j.jes.2015.05.017, 2015. a
Short summary
A 20-year (1996–2017) record of nitrogen dioxide column densities collected in Rome by a Brewer spectrophotometer is presented, together with the novel algorithm employed to re-evaluate the series. The high quality of the data is demonstrated by comparison with reference instrumentation, including a co-located Pandora spectrometer. The data can be used for satellite validation and identification of NO2 trends. The method can be replicated on other instruments of the international Brewer network.
A 20-year (1996–2017) record of nitrogen dioxide column densities collected in Rome by a Brewer...
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