Results 71 to 80 of about 690,046 (203)

Formaldehyde (HCHO) slant column densities measured during the cruise MSM58/2 over the Atlantic Ocean using MAX-DOAS

, 2019
During the cruise MSM58/2, a MAX-DOAS instrument was installed on Maria S. Merian. The instrument's measurements were used to retrieve the atmospheric abundance (in the form of slant column densities) of different trace gases.
Lisa K Behrens (8285424), Andreas Hilboll (386261), John Philip Burrows (7883753), Mihalis Vrekoussis (8285439), Folkard Wittrock (8285436), Wittrock, Folkard, Andreas Richter (8013032), Burrows, John Philipp, Richter, Andreas, Kalisz Hedegaard, Anna Beata, Alvarado, Leonardo M A, Peters, Enno, Hilboll, Andreas, Anna Beata Kalisz Hedegaard (8285433), Vrekoussis, Mihalis, Leonardo M A Alvarado (8285430), Enno Peters (8285427), Behrens, Lisa K   +17 more
core   +1 more source

MAX-DOAS Measurements of Nitrogen Dioxide and Aerosol

, 2012
Multi-axis differential optical absorption spectroscopy (MAX-DOAS) was applied to retrieve tropospheric NO2 and aerosol vertical profiles from downtown Toronto, and King City, Ontario during select periods in 2006 – 2010.
Mendolia, Deanna
core   +1 more source

MAX-DOAS NO₂ observations over Guangzhou, China; ground-based and satellite comparisons [PDF]

Atmospheric Measurement Techniques, 2018
In this study, the tropospheric NO2 vertical column density (VCD) over an urban site in Guangzhou megacity in China is investigated by means of MAX-DOAS measurements during a campaign from late March 2015 to mid-March 2016.
T. Drosoglou, M. E. Koukouli, N. Kouremeti, A. F. Bais, I. Zyrichidou, D. Balis, R. J. van der A, R. J. van der A, J. Xu, A. Li   +9 more
doaj   +1 more source

Evaluating TEMPO Formaldehyde Retrievals With Co‐Located Ground‐Based FTIR and Pandora Observations

Journal of Geophysical Research: Atmospheres, Volume 131, Issue 9, 16 May 2026.
Abstract Formaldehyde (HCHO) is an important proxy for volatile organic compounds and photochemical activity, with significant implications for air quality and atmospheric chemistry. The recently launched geostationary satellite instrument Tropospheric Emissions: Monitoring of Pollution (TEMPO) provides the first‐ever hourly observations of HCHO and ...
Ivan Ortega, James W. Hannigan, David Edwards, Wolfgang Stremme, Michel Grutter, Andrea Cadena‐Caicedo, Kimberly Strong, Victoria Flood, Xiaoyi Zhao, Gonzalo Gonzalez Abad, Caroline R. Nowlan   +10 more
wiley   +1 more source

Ground-Based MAX-DOAS Observations of CHOCHO and HCHO in Beijing and Baoding, China [PDF]

Remote Sensing, 2019
Glyoxal (CHOCHO) and formaldehyde (HCHO) trace gases were successfully retrieved from a multi-axis differential optical absorption spectroscopy (MAX-DOAS) system in Beijing (39.95°N, 116.32°E) and Baoding (39.15°N, 115.40°E), China. The measurements of these trace gases span the period from May 2017 to April 2018.
Zeeshan Javed, Cheng Liu, Muhammad Fahim Khokhar, Wei Tan, Haoran Liu, Chengzhi Xing, Xiangguang Ji, Aimon Tanvir, Qianqian Hong, Osama Sandhu, Abdul Rehman 0009   +10 more
openaire   +2 more sources

Validation of OMI HCHO Products Using MAX-DOAS observations from 2010 to 2016 in Xianghe, Beijing: Investigation of the Effects of Aerosols on Satellite Products

Remote Sensing, 2019
Formaldehyde (HCHO) is one of the most abundant hydrocarbons in the atmosphere. Its absorption features in the 320⁻360 nm range allow its concentration in the atmosphere to be retrieved from space.
Yapeng Wang, Zifeng Wang, Chao Yu, Songyan Zhu, Liangxiao Cheng, Ying Zhang, Liangfu Chen   +6 more
doaj   +1 more source

Retrieval of tropospheric NO₂ using the MAX-DOAS method combined with relative intensity measurements for aerosol correction [PDF]

Atmospheric Measurement Techniques, 2010
Multi-Axis Differential Optical Absorption Spectroscopy (MAX-DOAS) is a technique to measure trace gas amounts in the lower troposphere from ground-based scattered sunlight observations.
P. F. Levelt, P. Wang, P. Stammes, A. J. M. Piters, T. Vlemmix   +4 more
doaj   +1 more source

Neural Network–Assisted Metasurface Retroreflector With Wide‐Angle Adaptivity

Electron, Volume 4, Issue 2, May 2026.
This work proposes a wide‐angle, multi‐polarization, self‐sensing, and self‐adaptive intelligent metasurface retroreflector, with a planar profile and ultrathin thickness. By integrating a pre‐trained artificial neural network (ANN), the metasurface retroreflector can recognize the incident angle and promptly adapt to changes in the incoming wave.
Jing Ning, Xunfan Wang, Kun Duan, Weixu Yang, Junming Zhao, Tian Jiang, Ke Chen, Yijun Feng   +7 more
wiley   +1 more source

Snow‐Covered Insights From Above and Below: High‐Frequency Measurement of Nitrogen Dioxide From Space and Ground

Geophysical Research Letters, Volume 53, Issue 6, 28 March 2026.
Abstract The Tropospheric Emissions: Monitoring of Pollution (TEMPO) satellite provides hourly air quality measurements over North America. This study evaluates TEMPO NO2 ${\text{NO}}_{2}$ observations over snow‐covered surfaces, highlighting its ability to capture sharp spatial and temporal gradients in NO2 ${\text{NO}}_{2}$ vertical column densities ...
D. Griffin, X. Zhao, C. McLinden, N. Yazdani, C. R. Nowlan, G. González Abad, V. Fioletov, Elisabeth Galarneau, Cris Mihele, Sumi Wren, Yushan Su, Lukas Fehr, Adam Bourassa   +12 more
wiley   +1 more source

Long-term continuous observations of the horizontal inhomogeneity in lower-atmospheric water vapor concentration using A-SKY/MAX-DOAS

Progress in Earth and Planetary Science
We conducted long-term (2017–2022) continuous observations of water vapor concentration in the lower atmosphere (0–1 km) over Tsukuba and Chiba, Japan, using the multi-axis differential optical absorption spectroscopy (MAX-DOAS) technique within the ...
Shunya Mizobuchi, Hitoshi Irie, Shingo Shimizu   +2 more
doaj   +1 more source