Results 1 to 10 of about 2,581 (194)

Cloud detection and classification based on MAX-DOAS observations [PDF]

Atmospheric Measurement Techniques, 2014
Multi-axis differential optical absorption spectroscopy (MAX-DOAS) observations of aerosols and trace gases can be strongly influenced by clouds. Thus, it is important to identify clouds and characterise their properties. In this study we investigate the
T. Wagner, A. Apituley, S. Beirle, S. Dörner, U. Friess, J. Remmers, R. Shaiganfar   +6 more
doaj   +7 more sources

Mobile MAX-DOAS observations of tropospheric trace gases [PDF]

Atmospheric Measurement Techniques, 2010
From Multi-Axis- (MAX-) DOAS observations, information on tropospheric trace gases close to the surface and up to the free troposphere can be obtained. Usually MAX-DOAS observations are performed at fixed locations, which allows to retrieve the diurnal ...
T. Wagner, O. Ibrahim, R. Shaiganfar, U. Platt   +3 more
doaj   +5 more sources

Formaldehyde total column densities over Mexico City: comparison between multi-axis differential optical absorption spectroscopy and solar-absorption Fourier transform infrared measurements [PDF]

Atmospheric Measurement Techniques, 2021
Formaldehyde (HCHO) total column densities over the Mexico City metropolitan area (MCMA) were retrieved using two independent measurement techniques: multi-axis differential optical absorption spectroscopy (MAX-DOAS) and Fourier transform infrared (FTIR)
C. Rivera Cárdenas, C. Guarín, C. Guarín, W. Stremme, M. M. Friedrich, M. M. Friedrich, A. Bezanilla, D. Rivera Ramos, C. A. Mendoza-Rodríguez, M. Grutter, T. Blumenstock, F. Hase   +11 more
doaj   +4 more sources

MAX-DOAS measurements of tropospheric NO₂ and HCHO in Nanjing and a comparison to ozone monitoring instrument observations [PDF]

Atmospheric Chemistry and Physics, 2019
In this paper, we present long-term observations of atmospheric nitrogen dioxide (NO2) and formaldehyde (HCHO) in Nanjing using a Multi-AXis Differential Optical Absorption Spectroscopy (MAX-DOAS) instrument.
K. L. Chan, Z. Wang, A. Ding, K.-P. Heue, Y. Shen, J. Wang, F. Zhang, Y. Shi, N. Hao, M. Wenig   +9 more
doaj   +5 more sources

Estimation of NO_x emissions from Delhi using Car MAX-DOAS observations and comparison with OMI satellite data [PDF]

Atmospheric Chemistry and Physics, 2011
We present the first Multi-Axis-(MAX-) DOAS observations in India performed during April 2010 and January 2011 in Delhi and nearby regions. The MAX-DOAS instrument was mounted on a car roof, which allowed us to perform measurements along individual ...
R. P. Singh, A. Chauhan, S. Beirle, M. Sharma, R. Shaiganfar, T. Wagner   +5 more
doaj   +6 more sources

MAX-DOAS and OMI Measurements of Tropospheric NO2 and HCHO over Eastern China [PDF]

Journal of Geodesy and Geoinformation Science, 2020
In this paper, we present long term observations of atmospheric nitrogen dioxide (NO2) and formaldehyde (HCHO) in Nanjing using a Multi-AXis Differential Optical Absorption Spectroscopy (MAX-DOAS) instrument.
Ka-Lok CHAN,Zhuoru WANG,Aijun DING,Klaus-Peter HEUE,Nan HAO,Mark WENIG
doaj   +1 more source

Validation of MAX-DOAS retrievals of aerosol extinction, SO₂, and NO₂ through comparison with lidar, sun photometer, active DOAS, and aircraft measurements in the Athabasca oil sands region [PDF]

Atmospheric Measurement Techniques, 2020
Vertical profiles of aerosols, NO2, and SO2 were retrieved from Multi-Axis Differential Optical Absorption Spectroscopy (MAX-DOAS) measurements at a field site in northern Alberta, Canada, during August and September 2013.
Z. Y. W. Davis, U. Frieß, K. B. Strawbridge, M. Aggarwaal, S. Baray, E. G. Schnitzler, A. Lobo, A. Lobo, V. E. Fioletov, I. Abboud, C. A. McLinden, J. Whiteway, M. D. Willis, M. D. Willis, A. K. Y. Lee, J. Brook, J. Brook, J. Olfert, J. O'Brien, R. Staebler, H. D. Osthoff, C. Mihele, R. McLaren   +22 more
doaj   +1 more source

Retrieval and evaluation of tropospheric-aerosol extinction profiles using multi-axis differential optical absorption spectroscopy (MAX-DOAS) measurements over Athens, Greece [PDF]

Atmospheric Measurement Techniques, 2021
In this study, we report on the retrieval of aerosol extinction profiles from ground-based scattered sunlight multi-axis differential optical absorption spectroscopy (MAX-DOAS) measurements, carried out at Athens, Greece.
M. Gratsea, M. Gratsea, T. Bösch, P. Kokkalis, P. Kokkalis, A. Richter, M. Vrekoussis, M. Vrekoussis, S. Kazadzis, S. Kazadzis, A. Tsekeri, A. Papayannis, M. Mylonaki, V. Amiridis, N. Mihalopoulos, N. Mihalopoulos, N. Mihalopoulos, E. Gerasopoulos   +17 more
doaj   +1 more source

Inversion of tropospheric profiles of aerosol extinction and HCHO and NO₂ mixing ratios from MAX-DOAS observations in Milano during the summer of 2003 and comparison with independent data sets [PDF]

Atmospheric Measurement Techniques, 2011
We present aerosol and trace gas profiles derived from MAX-DOAS observations. Our inversion scheme is based on simple profile parameterisations used as input for an atmospheric radiative transfer model (forward model).
U. Platt, X. Li, W. Junkermann, K. P. Heue, J. D. Halla, C. Hak, U. Frieß, T. Deutschmann, T. Brauers, T. Wagner, S. Beirle, I. Pundt-Gruber   +11 more
doaj   +1 more source

Measurement report: MAX-DOAS measurements characterise Central London ozone pollution episodes during 2022 heatwaves [PDF]

Atmospheric Chemistry and Physics, 2023
Heatwaves are a substantial health threat in the UK, exacerbated by co-occurrence of ozone pollution episodes. Here we report on the first use of retrieved vertical profiles of nitrogen dioxide (NO2) and formaldehyde (HCHO) over Central London from a ...
R. G. Ryan, R. G. Ryan, E. A. Marais, E. Gershenson-Smith, R. Ramsay, J.-P. Muller, J.-L. Tirpitz, U. Frieß   +7 more
doaj   +1 more source