Results 21 to 30 of about 2,581 (194)

Retrieval of tropospheric ozone profiles using ground-based MAX-DOAS

Science of The Total Environment, 2023
In recent years, surface ozone concentrations have increased in many cities in China. Ground-based multi-axis differential optical absorption spectroscopy (MAX-DOAS) is a powerful technique for retrieving the profiles of tropospheric trace gases, such as NO2, SO2, and HCHO. However, since the difficulties in deducting the effects of stratospheric ozone,
Yuanyuan, Qian, Yuhan, Luo, Ke, Dou, Haijin, Zhou, Liang, Xi, Taiping, Yang, Tianshu, Zhang, Fuqi, Si   +7 more
openaire   +2 more sources

Cloud and aerosol classification for 2.5 years of MAX-DOAS observations in Wuxi (China) and comparison to independent data sets [PDF]

Atmospheric Measurement Techniques, 2015
Multi-axis differential optical absorption spectroscopy (MAX-DOAS) observations of trace gases can be strongly influenced by clouds and aerosols. Thus it is important to identify clouds and characterize their properties.
Y. Wang, M. Penning de Vries, P. H. Xie, S. Beirle, S. Dörner, J. Remmers, A. Li, T. Wagner   +7 more
doaj   +1 more source

A new interpretation of total column BrO during Arctic spring [PDF]

, 2010
Emission of bromine from sea-salt aerosol, frost flowers, ice leads, and snow results in the nearly complete removal of surface ozone during Arctic spring.
Atlas, E L, Bhartia, P K, Blake, D R, Bui, T P, Canty, T, Chance, K, Chen, G, Crawford, J H, da Silva, Arlindo, Dibb, Jack E., Donohue, D, Flocke, F, Gao, R S, Hendrick, F, Huey, L Gregory, Jacob, D J, Johnson, B, Johnston, P V, Kinnison, D, Knapp, D, Kreher, K, Kurosu, T P, Liang, Q, Liao, J, Liu, X, Montzka, D, Neilsen, J E, Neuman, J A, Nowak, J, Oltmans, S J, Pan, L L, Pawson, S, Pierce, R B, Pierce, R Bradley, Rodriguez, J. V., Ryerson, Thomas B, Salawitch, R J, Simpson, W R, Stickel, R E, Tanner, D, Tilmes, S, Van Roozendael, M, Weinheimer, Andrew   +42 more
core   +5 more sources

Aerosol Measurements over India: Comparison of MAX-DOAS Measurements with Ground-based (AERONET) and Satellite-based (MODIS) Data

Aerosol and Air Quality Research, 2023
In this study, we present ground-based multi-axis differential optical absorption spectroscopy (MAX-DOAS) measurements of aerosols from two urban locations (Delhi and Pune) and one high-altitude rural location (Mahabaleshwar) in India.
Prithviraj Mali, Mriganka Sekhar Biswas, Steffen Beirle, Thomas Wagner, Shrivardhan Hulswar, Swaleha Inamdar, Anoop S. Mahajan   +6 more
doaj   +1 more source

Evaluation of OMI NO₂ Vertical Columns Using MAX-DOAS Observations over Mexico City

Remote Sensing, 2021
Nitrogen dioxide (NO2) is a gas pollutant that can be measured from space and several operational products are now available from instruments on-board of satellite-based platforms.
Zuleica Ojeda Lerma, Claudia Rivera Cardenas, Martina M. Friedrich, Wolfgang Stremme, Alejandro Bezanilla, Edgar J. Arellano, Michel Grutter   +6 more
doaj   +1 more source

The impact of vibrational Raman scattering of air on DOAS measurements of atmospheric trace gases [PDF]

, 2015
In remote sensing applications, such as differential optical absorption spectroscopy (DOAS), atmospheric scattering processes need to be considered. After inelastic scattering on N2 and O2 molecules, the scattered photons occur as additional intensity at
Frieß, U., Lampel, J., Platt, U.
core   +9 more sources

MAX-DOAS measurements of NO2, HCHO and CHOCHO at a rural site in Southern China [PDF]

, 2012
We performed MAX-DOAS measurements during the PRIDE-PRD2006 campaign in the Pearl River Delta region (PRD), China, for 4 weeks in July 2006 at a site located 60 km north of Guangzhou. The vertical distributions of NO2, HCHO, and CHOCHO were independently
Brauers, T., Hofzumahaus, A., Li, X., Li, Y. P., Lu, Keding, Shao, M., Wagner, T., Wahner, A.   +7 more
core   +2 more sources

Parameterizing radiative transfer to convert MAX-DOAS dSCDs into near-surface box-averaged mixing ratios [PDF]

Atmospheric Measurement Techniques, 2013
We present a novel parameterization method to convert multi-axis differential optical absorption spectroscopy (MAX-DOAS) differential slant column densities (dSCDs) into near-surface box-averaged volume mixing ratios.
R. Sinreich, A. Merten, L. Molina, R. Volkamer   +3 more
doaj   +1 more source

Retrieval of NO2 Columns by Exploiting MAX-DOAS Observations and Comparison with OMI and TROPOMI Data during the Time Period of 2015–2019

Aerosol and Air Quality Research, 2022
Nitrogen dioxide (NO2)—a criteria major air pollutant, is of paramount importance due to its role in atmospheric chemistry and tropospheric ozone formation. Exposure to high concentrations of NO2 has been reported to cause various health issues in humans.
Ahmad Iqbal, Naveed Ahmad, Hassan Mohy ud Din, Michel Van Roozendael, Muhammad Shehzaib Anjum, Muhammad Zeeshan Ali Khan, Muhammad Fahim Khokhar   +6 more
doaj   +1 more source

Iodine monoxide in the Antarctic snowpack [PDF]

, 2009
Recent ground-based and space borne observations suggest the presence of significant amounts of iodine monoxide in the boundary layer of Antarctica, which are expected to have an impact on the ozone budget and might contribute to the formation of new ...
Deutschmann, T., Frieß, U., Gilfedder, B., Platt, U., Weller, Rolf   +4 more
core   +2 more sources