document

How aerosol size matters in aerosol optical depth (AOD) assimilation and the optimization using the Ångström exponent

Jin, J. (author), Henzing, B. (author), Segers, A.J. (author)

Satellite-based aerosol optical depth (AOD) has gained popularity as a powerful data source for calibrating aerosol models and correcting model errors through data assimilation. However, simulated airborne particle mass concentrations are not directly comparable to satellite-based AODs. For this, an AOD operator needs to be developed that can...

article 2023

document

Intercomparison of MAX-DOAS vertical profile retrieval algorithms Studies on field data from the CINDI-2 campaign

Tirpitz, J.L. (author), Frieß, U. (author), Hendrick, F. (author), Alberti, C. (author), Allaart, M. (author), Apituley, A. (author), Bais, A. (author), Beirle, S. (author), Berkhout, S. (author), Bognar, K. (author), Bösch, T. (author), Bruchkouski, I. (author), Cede, A. (author), Chan, K.L. (author), den Hoed, M. (author), Donner, S. (author), Drosoglou, T. (author), Fayt, C. (author), Friedrich, M.M. (author), Frumau, A. (author), Gast, L. (author), Gielen, C. (author), Gomez-Martín, L. (author), Hao, N. (author), Hensen, A. (author), Henzing, B. (author), Hermans, C. (author), Jin, J. (author), Kreher, K. (author), Kuhn, J. (author), Lampel, J. (author), Li, A. (author), Liu, C. (author), Liu, H. (author), Ma, J. (author), Merlaud, A. (author), Peters, E. (author), Pinardi, G. (author), Piters, A. (author), Platt, U. (author), Puentedura, O. (author), Richter, A. (author), Schmitt, S. (author), Spinei, E. (author), stein Zweers, D. (author), Strong, K. (author), Swart, D. (author), Tack, F. (author), Tiefengraber, M. (author), van der Hoff, R. (author), van Roozendael, M. (author), Vlemmix, T. (author), Vonk, J. (author), Wagner, T. (author), Wang, Y. (author), Wang, Z. (author), Wenig, M. (author), Wiegner, M. (author), Wittrock, F. (author), Xie, P. (author), Xing, C. (author), Xu, J. (author), Yela, M. (author), Zhang, C. (author), Zhao, X. (author)

The second Cabauw Intercomparison of Nitrogen Dioxide measuring Instruments (CINDI-2) took place in Cabauw (the Netherlands) in September 2016 with the aim of assessing the consistency of multi-axis differential optical absorption spectroscopy (MAX-DOAS) measurements of tropospheric species (NO2, HCHO, O3, HONO, CHOCHO and O4). This was achieved...

article 2021

document

Position correction in dust storm forecasting using LOTOS-EUROS v2.1: Grid-distorted data assimilation v1.0

Jin, J. (author), Segers, A. (author), Lin, H.X. (author), Henzing, B. (author), Wang, X. (author), Heemink, A. (author), Liao, H. (author)

When calibrating simulations of dust clouds, both the intensity and the position are important. Intensity er rors arise mainly from uncertain emission and sedimenta tion strengths, while position errors are attributed either to imperfect emission timing or to uncertainties in the trans port. Though many studies have been conducted on the cal...

article 2021

document

Intercomparison of NO2, O4, O3 and HCHO slant column measurements by MAX-DOAS and zenith-sky UV-visible spectrometers during CINDI-2

Kreher, K. (author), van Roozendael, M. (author), Hendrick, F. (author), Apituley, A. (author), Dimitropoulou, E. (author), Friess, U. (author), Richter, A. (author), Wagner, T. (author), Lampel, J. (author), Abuhassan, N. (author), Ang, L. (author), Anguas, M. (author), Bais, A. (author), Benavent, N. (author), Bosch, T. (author), Bognar, K. (author), Borovski, A. (author), Bruchkouski, I. (author), Cede, A. (author), lok Chan, K. (author), Donner, S. (author), Drosoglou, T. (author), Fayt, C. (author), Finkenzeller, H. (author), Garcia-Nieto, D. (author), Gielen, C. (author), Gómez-Martín, L. (author), Hao, N. (author), Henzing, B. (author), Herman, J. (author), Hermans, C. (author), Hoque, S. (author), Irie, H. (author), Jin, J. (author), Johnston, P. (author), khayyam Butt, J. (author), Khokhar, F. (author), Koenig, T. (author), Kuhn, J. (author), Kumar, V. (author), Liu, C. (author), Ma, J. (author), Merlaud, A. (author), Mishra, A. (author), Müller, M. (author), Navarro-Comas, M. (author), Ostendorf, M. (author), Pazmino, A. (author), Peters, E. (author), Pinardi, G. (author), Pinharanda, M. (author), Piters, A. (author), Platt, U. (author), Postylyakov, O. (author), Prados-Roman, C. (author), Puentedura, O. (author), Querel, R. (author), Saiz-Lopez, A. (author), Schonhardt, A. (author), Schreier, S. (author), Sinha, V. (author), Spinei, E. (author), Strong, K. (author), Tack, F. (author), Tian, X. (author), Tiefengraber, M. (author), van Gent, J. (author), Volkamer, R. (author), Vrekoussis, M. (author), Wang, S. (author), Wang, Z. (author), Wenig, M. (author), Wittrock, F. (author), Xie, P. (author), Xu, J. (author), Yela, M. (author), Zhang, C. (author), Zhao, X. (author)

In September 2016, 36 spectrometers from 24 institutes measured a number of key atmospheric pollutants for a period of 17 d during the Second Cabauw Intercomparison campaign for Nitrogen Dioxide measuring Instruments (CINDI-2) that took place at Cabauw, the Netherlands (51.97-N, 4.93-E). We report on the outcome of the formal semi-blind...

article 2020

document

Is a scaling factor required to obtain closure between measured and modelled atmospheric O4 absorptions? An assessment of uncertainties of measurements and radiative transfer simulations for 2 selected days during the MAD-CAT campaign

Wagner, T. (author), Beirle, S. (author), Benavent, N. (author), Bösch, T. (author), lok Chan, K. (author), Donner, S. (author), Dörner, S. (author), Fayt, C. (author), Frieß, U. (author), García-Nieto, D. (author), Gielen, C. (author), González-Bartolome, D. (author), Gomez, L. (author), Hendrick, F. (author), Henzing, B. (author), li Jin, J. (author), Lampel, J. (author), Ma, J. (author), Mies, K. (author), Navarro, M. (author), Peters, E. (author), Pinardi, G. (author), Puentedura, O. (author), Pukite, J. (author), Remmers, J. (author), Richter, A. (author), Saiz-Lopez, A. (author), Shaiganfar, R. (author), Sihler, H. (author), van Roozendael, M. (author), Wang, Y. (author), Yela, M. (author)

In this study the consistency between MAX-DOAS measurements and radiative transfer simulations of the atmospheric O 4 absorption is investigated on 2 mainly cloud-free days during the MAD-CAT campaign in Mainz, Germany, in summer 2013. In recent years several studies indicated that measurements and radiative transfer simulations of the...

article 2019

document

Long-term observations of the background aerosol at Cabauw, The Netherlands

Mamali, D. (author), Mikkilä, J. (author), Henzing, B. (author), Spoor, R. (author), Ehn, M. (author), Petäjä, T. (author), Russchenberg, H. (author), Biskos, G. (author)

Long-term measurements of PM2.5 mass concentrations and aerosol particle size distributions from 2008 to 2015, as well as hygroscopicity measurements conducted over one year (2008–2009) at Cabauw, The Netherlands, are compiled here in order to provide a comprehensive dataset for understanding the trends and annual variabilities of the...

article 2018

document

Visibility in the Netherlands during New Year's fireworks: The role of soot and salty aerosol products

ten Brink, H. (author), Henzing, B. (author), Otjes, R. (author), Weijers, E. (author)

The visibility on New Year's nights in the Netherlands is low during stagnant weather. This is due to the scattering and absorption of light by the aerosol-smoke from the fireworks. We made an assessment of the responsible aerosol-species. The investigation took place during the New Year's night of 2009. Measurements were made at a regional site...

article 2018

document

A European aerosol phenomenology - 6: Scattering properties of atmospheric aerosol particles from 28 ACTRIS sites

Pandolfi, M. (author), Alados-Arboledas, L. (author), Alastuey, A. (author), Andrade, M. (author), Angelov, C. (author), Artiñano, B. (author), Backman, J. (author), Baltensperger, U. (author), Bonasoni, P. (author), Bukowiecki, N. (author), Collaud Coen, M. (author), Conil, S. (author), Coz, E. (author), Crenn, V. (author), Dudoitis, V. (author), Ealo, M. (author), Eleftheriadis, K. (author), Favez, O. (author), Fetfatzis, P. (author), Fiebig, M. (author), Flentje, H. (author), Ginot, P. (author), Gysel, M. (author), Henzing, B. (author), Hoffer, A. (author), Holubova Smejkalova, A. (author), Kalapov, I. (author), Kalivitis, N. (author), Kouvarakis, G. (author), Kristensson, A. (author), Kulmala, M. (author), Lihavainen, H. (author), Lunder, C. (author), Luoma, K. (author), Lyamani, H. (author), Marinoni, A. (author), Mihalopoulos, N. (author), Moerman, M. (author), Nicolas, J. (author), O'Dowd, C. (author), Petäjä, T. (author), Petit, J.E. (author), Marc Pichon, J. (author), Prokopciuk, N. (author), Putaud, J.P. (author), Rodríguez, S. (author), Sciare, J. (author), Sellegri, K. (author), Swietlicki, E. (author), Titos, G. (author), Tuch, T. (author), Tunved, P. (author), Ulevicius, V. (author), Vaishya, A. (author), Vana, M. (author), Virkkula, A. (author), Vratolis, S. (author), Weingartner, E. (author), Wiedensohler, A. (author), Laj, P. (author)

This paper presents the light-scattering properties of atmospheric aerosol particles measured over the past decade at 28 ACTRIS observatories, which are located mainly in Europe. The data include particle light scattering (σsp) and hemispheric backscattering (σbsp) coefficients, scattering Ångström exponent (SAE), backscatter fraction (BF) and...

article 2018

document

BOREAS - A new MAX-DOAS profile retrieval algorithm for aerosols and trace gases

Bösch, T. (author), Rozanov, V. (author), Richter, A. (author), Peters, E. (author), Rozanov, A. (author), Wittrock, F. (author), Merlaud, A. (author), Lampel, J. (author), Schmitt, S. (author), de Haij, M. (author), Berkhout, S. (author), Henzing, B. (author), Apituley, A. (author), den Hoed, M. (author), Vonk, J. (author), Tiefengraber, M. (author), Müller, M. (author), Burrows, J.P. (author)

We present a new MAX-DOAS profiling algorithm for aerosols and trace gases, BOREAS, which utilizes an iterative solution method including Tikhonov regularization and the optimal estimation technique. The aerosol profile retrieval is based on a novel approach in which the absorption depth of O4 is directly used in order to retrieve extinction...

article 2018

document

Long-term cloud condensation nuclei number concentration, particle number size distribution and chemical composition measurements at regionally representative observatories

Schmale, J. (author), Henning, S. (author), Decesari, S. (author), Henzing, B. (author), Keskinen, H. (author), Sellegri, K. (author), Ovadnevaite, J. (author), Pöhlker, M. (author), Brito, J. (author), Bougiatioti, A. (author), Kristensson, A. (author), Kalivitis, N. (author), Stavroulas, I. (author), Carbone, S. (author), Jefferson, A. (author), Park, M. (author), Schlag, P. (author), Iwamoto, Y. (author), Aalto, P. (author), Äijälä, M. (author), Bukowiecki, N. (author), Ehn, M. (author), Fröhlich, R. (author), Frumau, A. (author), Herrmann, E. (author), Herrmann, H. (author), Holzinger, R. (author), Kos, G. (author), Kulmala, M. (author), Mihalopoulos, N. (author), Nenes, A. (author), O'Dowd, C. (author), Petäjä, T. (author), Picard, D. (author), Pöhlker, C. (author), Pöschl, U. (author), Poulain, L. (author), Swietlicki, E. (author), Andreae, M. (author), Artaxo, P. (author), Wiedensohler, A. (author), Ogren, J. (author), Matsuki, A. (author), Soo Yum, S. (author), Stratmann, F. (author), Baltensperger, U. (author), Gysel, M. (author)

Aerosol-cloud interactions (ACI) constitute the single largest uncertainty in anthropogenic radiative forcing. To reduce the uncertainties and gain more confidence in the simulation of ACI, models need to be evaluated against observations, in particular against measurements of cloud condensation nuclei (CCN). Here we present a data set - ready...

article 2018

document

Evaluation and inter-comparison of oxygen-based OC-EC separation methods for radiocarbon analysis of ambient aerosol particle samples

Zenker, K. (author), Vonwiller, M. (author), Szidat, S. (author), Calzolai, G. (author), Giannoni, M. (author), Bernardoni, V. (author), Jedynska, A.D. (author), Henzing, B. (author), Meijer, H.A. (author), Dusek, U. (author)

Radiocarbon analysis is a widely-used tool for source apportionment of aerosol particles. One of the big challenges of this method, addressed in this work, is to isolate elemental carbon (EC) for 14C analysis. In the first part of the study, we validate a two-step method (2stepCIO) to separate total carbon (TC) into organic carbon (OC) and EC...

article 2017

document

Visibility in the Netherlands during New Year`s fireworks: The role of soot

ten Brink, H.M. (author), Otjes, R.P. (author), Weijers, E.P. (author), Henzing, B. (author)

The visibility on New Year's nights in the Netherlands is low during stagnant weather. This is due to the scattering and absorption of light by the aerosol-smoke from the ?reworks. We made an assessment of the responsible aerosol-species. The investigation took place during the New Year's night of 2009. Measurements were made at a regional site...

article 2017

document

Collocated observations of cloud condensation nuclei, particle size distributions, and chemical composition

Schmale, J. (author), Henning, S. (author), Henzing, B. (author), Keskinen, H. (author), Sellegri, K. (author), Ovadnevaite, J. (author), Bougiatioti, A. (author), Kalivitis, N. (author), Stavroulas, I. (author), Jefferson, A. (author), Park, M. (author), Schlag, P. (author), Kristensson, A. (author), Iwamoto, Y. (author), Pringle, K. (author), Reddington, C. (author), Aalto, P. (author), Äijälä, M. (author), Baltensperger, U. (author), Bialek, J. (author), Birmili, W. (author), Bukowiecki, N. (author), Ehn, M. (author), Fjæraa, A.M. (author), Fiebig, M. (author), Frank, G. (author), Fröhlich, R. (author), Frumau, A. (author), Furuya, M. (author), Hammer, E. (author), Heikkinen, L. (author), Herrmann, E. (author), Holzinger, R. (author), Hyono, H. (author), Kanakidou, M. (author), Kiendler-Scharr, A. (author), Kinouchi, K. (author), Kos, G. (author), Kulmala, M. (author), Mihalopoulos, N. (author), Motos, G. (author), Nenes, A. (author), O'Dowd, C. (author), Paramonov, M. (author), Petäjä, T. (author), Picard, D. (author), Poulain, L. (author), Prévôt, A.S.H. (author), Slowik, J. (author), Sonntag, A. (author), Swietlicki, E. (author), Svenningsson, B. (author), Tsurumaru, H. (author), Wiedensohler, A. (author), Wittbom, C. (author), Ogren, J.A. (author), Matsuki, A. (author), Yum, S.S. (author), Myhre, C.L. (author), Carslaw, K. (author), Stratmann, F. (author), Gysel, M. (author)

Cloud condensation nuclei (CCN) number concentrations alongside with submicrometer particle number size distributions and particle chemical composition have been measured at atmospheric observatories of the Aerosols, Clouds, and Trace gases Research InfraStructure (ACTRIS) as well as other international sites over multiple years. Here,...

article 2017

document

Intercomparison of aerosol extinction profiles retrieved from MAX-DOAS measurements

Friess, U. (author), Klein Baltink, H. (author), Beirle, S. (author), Clémer, K. (author), Hendrick, F. (author), Henzing, B. (author), Irie, H. (author), de Leeuw, G. (author), Li, A. (author), Moerman, M.M. (author), Van Roozendael, M. (author), Shaiganfar, R. (author), Wagner, T. (author), Wang, Y. (author), Xie, P. (author), Yilmaz, S. (author), Zieger, P. (author)

A first direct intercomparison of aerosol vertical profiles from Multi-Axis Differential Optical Absorption Spectroscopy (MAX-DOAS) observations, performed during the Cabauw Intercomparison Campaign of Nitrogen Dioxide measuring Instruments (CINDI) in summer 2009, is presented. Five out of 14 participants of the CINDI campaign reported aerosol...

article 2016

document

New steps in munition health monitoring

Hooijmeijer, P.A. (author), de Bes, J.B. (author), de Klerk, W.P.C. (author), Henzing, B. (author)

conference paper 2014

document

Variations in tropospheric submicron particle size distributions across the European continent 2008-2009

Beddows, D.C.S. (author), Dall'Osto, M. (author), Harrison, R.M. (author), Kulmala, M. (author), Asmi, A. (author), Wiedensohler, A. (author), Laj, P. (author), Fjaeraa, A.M. (author), Sellegri, K. (author), Birmili, W. (author), Bukowiecki, N. (author), Weingartner, E. (author), Baltensperger, U. (author), Zdimal, V. (author), Zikova, N. (author), Putaud, J.P. (author), Marinoni, A. (author), Tunved, P. (author), Hansson, H.C. (author), Fiebig, M. (author), Kivekäs, N. (author), Swietlicki, E. (author), Lihavainen, H. (author), Asmi, E. (author), Ulevicius, V. (author), Aalto, P.P. (author), Mihalopoulos, N. (author), Kalivitis, N. (author), Kalapov, I. (author), Kiss, G. (author), de Leeuw, G. (author), Henzing, B. (author), O'Dowd, C. (author), Jennings, S.G. (author), Flentje, H. (author), Meinhardt, F. (author), Ries, L. (author), van der Gon, H.A.C. (author), Visschedijk, A.J.H. (author)

Clusteranalysis of particle number size distributions frombackground sites across Europeis presented. This generated a total of nine clusters of particle size distributions which could be further combined into two main groups, namely: a south-to-north category (four clusters) and a west-to-east category (five clusters). The first group was...

article 2014

document

The Cabauw Intercomparison campaign for Nitrogen Dioxide measuring Instruments (CINDI): Design, execution, and early results

Piters, A.J.M. (author), Boersma, K.F. (author), Kroon, M. (author), Hains, J.C. (author), van Roozendael, M. (author), Wittrock, F. (author), Abuhassan, N. (author), Adams, C. (author), Akrami, M. (author), Allaart, M.A.F. (author), Apituley, A. (author), Beirle, S. (author), Bergwerff, J.B. (author), Berkhout, A.J.C. (author), Brunner, D. (author), Cede, A. (author), Chong, J. (author), Clémer, K. (author), Fayt, C. (author), Frieß, U. (author), Gast, L.F.L. (author), Gil-Ojeda, M. (author), Goutail, F. (author), Graves, R. (author), Griesfeller, A. (author), Großmann, K. (author), Hemerijckx, G. (author), Hendrick, F. (author), Henzing, B. (author), Herman, J. (author), Hermans, C. (author), Hoexum, M. (author), van der Hoff, G.R. (author), Irie, H. (author), Johnston, P.V. (author), Kanaya, Y. (author), Kim, Y.J. (author), Klein Baltink, H. (author), Kreher, K. (author), de Leeuw, G. (author), Leigh, R. (author), Merlaud, A. (author), Moerman, M.M. (author), Monks, P.S. (author), Mount, G.H. (author), Navarro-Comas, M. (author), Oetjen, H. (author), Pazmino, A. (author), Perez-Camacho, M. (author), Peters, E. (author), Du Piesanie, A. (author), Pinardi, G. (author), Puentedura, O. (author), Richter, A. (author), Roscoe, H.K. (author), Schönhardt, A. (author), Schwarzenbach, B. (author), Shaiganfar, R. (author), Sluis, W. (author), Spinei, E. (author), Stolk, A.P. (author), Strong, K. (author), Swart, D.P.J. (author), Takashima, H. (author), Vlemmix, T. (author), Vrekoussis, M. (author), Wagner, T. (author), Whyte, C. (author), Wilson, K.M. (author), Yela, M. (author), Yilmaz, S. (author), Zieger, P. (author), Zhou, Y. (author)

From June to July 2009 more than thirty different in-situ and remote sensing instruments from all over the world participated in the Cabauw Intercomparison campaign for Nitrogen Dioxide measuring Instruments (CINDI). The campaign took place at KNMI's Cabauw Experimental Site for Atmospheric Research (CESAR) in the Netherlands. Its main...

article 2012

document

Mobility particle size spectrometers: Harmonization of technical standards and data structure to facilitate high quality long-term observations of atmospheric particle number size distributions

Wiedensohler, A. (author), Birmili, W. (author), Nowak, A. (author), Sonntag, A. (author), Weinhold, K. (author), Merkel, M. (author), Wehner, B. (author), Tuch, T. (author), Pfeifer, S. (author), Fiebig, M. (author), Fjäraa, A.M. (author), Asmi, E. (author), Sellegri, K. (author), Depuy, R. (author), Venzac, H. (author), Villani, P. (author), Laj, P. (author), Aalto, P. (author), Ogren, J.A. (author), Swietlicki, E. (author), Williams, P. (author), Roldin, P. (author), Quincey, P. (author), Hüglin, C. (author), Fierz-Schmidhauser, R. (author), Gysel, M. (author), Weingartner, E. (author), Riccobono, F. (author), Santos, S. (author), Grüning, C. (author), Faloon, K. (author), Beddows, D. (author), Harrison, R. (author), Monahan, C. (author), Jennings, S.G. (author), O'Dowd, C.D. (author), Marinoni, A. (author), Horn, H.-G. (author), Keck, L. (author), Jiang, J. (author), Scheckman, J. (author), McMurry, P.H. (author), Deng, Z. (author), Zhao, C.S. (author), Moerman, M. (author), Henzing, B. (author), de Leeuw, G. (author), Löschau, G. (author), Bastian, S. (author)

Mobility particle size spectrometers often referred to as DMPS (Differential Mobility Particle Sizers) or SMPS (Scanning Mobility Particle Sizers) have found a wide range of applications in atmospheric aerosol research. However, comparability of measurements conducted world-wide is hampered by lack of generally accepted technical standards and...

article 2012

document

Aerosol chemical composition at Cabauw, the Netherlands as observed in two intensive periods in May 2008 and March 2009

Mensah, A.A. (author), Holzinger, R. (author), Otjes, R. (author), Trimborn, A. (author), Mentel, T.F. (author), ten Brink, H. (author), Henzing, B. (author), Kiendler-Scharr, A. (author)

Observations of aerosol chemical composition in Cabauw, the Netherlands, are presented for two intensive measurement periods in May 2008 and March 2009. Sub-micron aerosol chemical composition was measured by an Aerodyne Aerosol Mass Spectrometer (AMS) and is compared to observations from aerosol size distribution measurements as well as...

article 2012

document

Number size distributions and seasonality of submicron particles in Europe 2008-2009

Asmi, A. (author), Wiedensohler, A. (author), Laj, P. (author), Fjaeraa, A.-M. (author), Sellegri, K. (author), Birmili, W. (author), Weingartner, E. (author), Baltensperger, U. (author), Zdimal, V. (author), Zikova, N. (author), Putaud, J.-P. (author), Marinoni, A. (author), Tunved, P. (author), Hansson, H.-C. (author), Fiebig, M. (author), Kivekäs, N. (author), Lihavainen, H. (author), Asmi, E. (author), Ulevicius, V. (author), Aalto, P.P. (author), Swietlicki, E. (author), Kristensson, A. (author), Mihalopoulos, N. (author), Kalivitis, N. (author), Kalapov, I. (author), Kiss, G. (author), de Leeuw, G. (author), Henzing, B. (author), Harrison, R.M. (author), Beddows, D. (author), O'Dowd, C. (author), Jennings, S.G. (author), Flentje, H. (author), Weinhold, K. (author), Meinhardt, F. (author), Ries, L. (author), Kulmala, M. (author)

Two years of harmonized aerosol number size distribution data from 24 European field monitoring sites have been analysed. The results give a comprehensive overview of the European near surface aerosol particle number concentrations and number size distributions between 30 and 500 nm of dry particle diameter. Spatial and temporal distribution of...

article 2011