Results 61 to 70 of about 690,046 (203)

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

Cyberattack‐Resilient Fractional‐Order PPI Control for Frequency Regulation in PV‐Integrated Power Systems

CAAI Transactions on Intelligence Technology, EarlyView.
ABSTRACT Load‐frequency control (LFC) comprises a primary process in interconnected electrical power systems, playing a critical role in maintaining the stability and reliability of the electrical grid. It is of paramount importance that the designed controller functions in an optimal manner, particularly with regard to the compression of area ...
Bora Çavdar, Erdinç Şahin, Fatih Mehmet Nuroğlu   +2 more
wiley   +1 more source

Five Years of Spatially Resolved Ground-Based MAX-DOAS Measurements of Nitrogen Dioxide in the Urban Area of Athens: Synergies with In Situ Measurements and Model Simulations

Atmosphere, 2021
Long-term nitrogen dioxide (NO2) slant column density measurements using the MAX-DOAS (multi-axis differential optical absorption spectroscopy) technique were analyzed in order to demonstrate the temporal and horizontal variability of the trace gas in ...
Myrto Gratsea, Eleni Athanasopoulou, Anastasia Kakouri, Andreas Richter, Andre Seyler, Evangelos Gerasopoulos   +5 more
doaj   +1 more source

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

Glyoxal (CHOCHO) 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

Ability of the MAX-DOAS method to derive profile information for NO₂: can the boundary layer and free troposphere be separated? [PDF]

Atmospheric Measurement Techniques, 2011
Multiple Axis Differential Optical Absorption Spectroscopy (MAX-DOAS) instruments can measure from the ground the absorption by nitrogen dioxide (NO2) of scattered sunlight seen in multiple viewing directions.
P. Wang, P. F. Levelt, L. F. L. Gast, A. J. C. Berkhout, A. J. M. Piters, T. Vlemmix   +5 more
doaj   +1 more source

Political Partisanship and State‐Level Bank Efficiency

Financial Review, EarlyView.
ABSTRACT We examine the relationship between political partisanship and commercial bank efficiency in the United States from 1972 to 2020, assessing the persistent influence of political affiliations at the state and District of Columbia levels. Bank efficiency scores are estimated using a double‐bootstrap approach, and the analysis is conducted within
Jeremy Eng‐Tuck Cheah, Tapas Mishra, Sofia Johan, Thao Ngoc Nguyen   +3 more
wiley   +1 more source

Untersuchung der Luftqualität in der Meeresumwelt der Nord- und Ostsee mit MAX-DOAS-Messungen

, 2021
This thesis presents MAX-DOAS measurements of the air pollutants NO2 and SO2 in the marine environment of the North and Baltic Sea and the surrounding coastal areas.
Seyler, André
core   +1 more source

Multi‐Species Constraints Resolve Methane Source Versus Sink Changes: Lessons From 2020

Earth's Future, Volume 14, Issue 6, June 2026.
Abstract Satellite observations show that atmospheric methane (CH4) increased by a record‐breaking 19 ppb in 2020, but the causes are unclear because of uncertain impacts from COVID‐related pollutant shifts on hydroxyl (OH) radical concentrations. Here we employ an ensemble of constraints to simultaneously quantify methane sources and sinks for 2020 in
Xueying Yu, Dylan B. Millet, Daven K. Henze, Helen Worden, Corinne Vigouroux, Prabir Patra, Jason D. Hill, Robert B. Jackson   +7 more
wiley   +1 more source

The MAX-DOAS network in Mexico City to measure atmospheric pollutants

Atmósfera, 2016
An instrument based on the Multi Axis Differential Optical Absorption Spectroscopy (MAX-DOAS) technique was designed and constructed to measure scattered sunlight in the UV-visible region at different elevation angles. Slant column densities (SCDs) of specific gas absorbers such as nitrogen dioxide (NO2) and formaldehyde (HCHO) are derived from the ...
JOSUÉ ARELLANO, ARNE KRÜGER, CLAUDIA RIVERA, WOLFGANG STREMME, MARTINA M. FRIEDRICH, ALEJANDRO BEZANILLA, MICHEL GRUTTER   +6 more
openaire   +2 more sources