Results 51 to 60 of about 2,581 (194)

Towards a New MAX-DOAS Measurement Site in the Po Valley: NO₂ Total VCDs

Remote Sensing, 2022
Multi-AXis Differential Optical Absorption Spectroscopy (MAX-DOAS) instruments are used worldwide to retrieve pollutant information from visible (VIS) and ultra-violet (UV) diffuse solar spectra.
Paolo Pettinari, Elisa Castelli, Enzo Papandrea, Maurizio Busetto, Massimo Valeri, Bianca Maria Dinelli   +5 more
doaj   +1 more source

Retrievals of formaldehyde from ground-based FTIR and MAX-DOAS observations at the Jungfraujoch station and comparisons with GEOS-Chem and IMAGES model simulations [PDF]

Atmospheric Measurement Techniques, 2015
As an ubiquitous product of the oxidation of many volatile organic compounds (VOCs), formaldehyde (HCHO) plays a key role as a short-lived and reactive intermediate in the atmospheric photo-oxidation pathways leading to the formation of
B. Franco, F. Hendrick, M. Van Roozendael, J.-F. Müller, T. Stavrakou, E. A. Marais, B. Bovy, W. Bader, C. Fayt, C. Hermans, B. Lejeune, G. Pinardi, C. Servais, E. Mahieu   +13 more
doaj   +1 more source

Comparative Assessment of Energetic Plasticizers Including NFPEG3N3 in a GAP/HMX Formulation: Mechanics, Stability, Combustion, and Performance

Propellants, Explosives, Pyrotechnics, EarlyView.
ABSTRACT We examine the new energetic plasticizer 3‐(2‐(2‐(2‐azidoethoxy)ethoxy)ethoxy)‐4‐nitro‐1,2,5‐oxadiazole (NFPEG3N3), three reference compounds (BDNPA/F, Bu‐NENA, and DNDA‐57), and a plasticizer‐free control in a fixed HMX/GAP composite. NFPEG3N3 provides the strongest low‐temperature properties, yielding the lowest formulation glass transition ...
Patrick Lieber, Uwe Schaller, Thomas M. Klapötke   +2 more
wiley   +1 more source

Validation of OMI, GOME-2A and GOME-2B tropospheric NO₂, SO₂ and HCHO products using MAX-DOAS observations from 2011 to 2014 in Wuxi, China: investigation of the effects of priori profiles and aerosols on the satellite products [PDF]

Atmospheric Chemistry and Physics, 2017
Tropospheric vertical column densities (VCDs) of NO2, SO2 and HCHO derived from the Ozone Monitoring Instrument (OMI) on AURA and the Global Ozone Monitoring Experiment 2 aboard METOP-A (GOME-2A) and METOP-B (GOME-2B) are widely used to characterize the ...
Y. Wang, S. Beirle, J. Lampel, M. Koukouli, I. De Smedt, N. Theys, A. Li, D. Wu, P. Xie, C. Liu, M. Van Roozendael, T. Stavrakou, J.-F. Müller, T. Wagner   +13 more
doaj   +1 more source

AVCLNet: Multimodal Multispeaker Tracking Network Using Audio‐Visual Contrastive Learning

CAAI Transactions on Intelligence Technology, EarlyView.
ABSTRACT Audio‐visual speaker tracking aims to determine the locations of multiple speakers in the scene by leveraging signals captured from multisensor platforms. Multimodal fusion methods can improve both the accuracy and robustness of speaker tracking.
Yihan Li, Yidi Li, Zhenhuan Xu, Hao Guo, Mengyuan Liu, Weiwei Wan   +5 more
wiley   +1 more source

MAX-DOAS measurements of atmospheric trace gases in Ny-Ålesund [PDF]

, 2003
Abstract. A new approach to derive tropospheric concentrations of some atmospheric trace gases from ground-based UV/vis measurements is described. The instrument, referred to as the MAX-DOAS, is based on the well-known UV/vis instruments, which use the sunlight scattered in the zenith sky as the light source and the method of Differential Optical ...
Wittrock, F., Oetjen, H., Richter, A., Fietkau, S., Medeke, T., Rozanov, A., Burrows, J. P.   +6 more
openaire   +2 more sources

Intercomparison of MAX-DOAS Vertical Profile Retrieval Algorithms: Studies using Synthetic Data [PDF]

Atmospheric Measurement Techniques, 2018
Abstract. Multi-Axis Differential Optical Absorption Spectroscopy (MAX-DOAS) is a widely used measurement technique for the detection of a variety of atmospheric trace gases. Using inverse modelling, the observation of trace gas column densities along different lines of sight enables the retrieval of aerosol and trace gas vertical profiles in the ...
U. Frieß, S. Beirle, L. Alvarado Bonilla, T. Bösch, M. M. Friedrich, F. Hendrick, A. Piters, A. Richter, M. van Roozendael, V. V. Rozanov, E. Spinei, E. Spinei, J.-L. Tirpitz, T. Vlemmix, T. Wagner, Y. Wang   +15 more
openaire   +5 more sources

Studies of the horizontal inhomogeneities in NO₂ concentrations above a shipping lane using ground-based multi-axis differential optical absorption spectroscopy (MAX-DOAS) measurements and validation with airborne imaging DOAS measurements [PDF]

Atmospheric Measurement Techniques, 2019
This study describes a novel application of an “onion-peeling” approach to multi-axis differential optical absorption spectroscopy (MAX-DOAS) measurements of shipping emissions aiming at investigating the strong horizontal inhomogeneities in NO2 over a ...
A. Seyler, A. C. Meier, F. Wittrock, L. Kattner, L. Kattner, B. Mathieu-Üffing, B. Mathieu-Üffing, B. Mathieu-Üffing, E. Peters, E. Peters, A. Richter, T. Ruhtz, A. Schönhardt, S. Schmolke, J. P. Burrows   +14 more
doaj   +1 more source

Retrieval interval mapping: a tool to visualize the impact of the spectral retrieval range on differential optical absorption spectroscopy evaluations [PDF]

, 2013
Remote sensing via differential optical absorption spectroscopy (DOAS) has become a standard technique to identify and quantify trace gases in the atmosphere. Due to the wide range of measurement conditions, atmospheric compositions and instruments used,
Lampel, J., Platt, U., Sihler, H., Vogel, L., Wagner, T.   +4 more
core   +2 more sources

D‐amino acid oxidase as a chemogenetic tool for spatiotemporally controlled hydrogen peroxide production: The oxygen connection

British Journal of Pharmacology, EarlyView.
Abstract Background and Purpose D‐amino acid oxidase (DAO) has been developed as a chemogenetic tool, to precisely manipulate redox levels in tissues and cells by generating H2O2 in the presence of D‐amino acids. The enzyme's significant oxygen consumption during H2O2 production may influence cellular oxygen levels.
Wiebke Maurer, Anke Zieseniss, Vamsi Priya Vikram, Yamin Chen, Laura Bauer, Annette Hillemann, Peter Rehling, Maithily S. Nanadikar, Diane de Zélicourt, Vartan Kurtcuoglu, Dörthe M. Katschinski   +10 more
wiley   +1 more source