Results 1 to 10 of about 12,264 (254)

Effect of stratosphere-troposphere exchange on the future tropospheric ozone trend [PDF]

Journal of Geophysical Research, 2003
This paper investigates the impact of circulation changes in a changed climate on the exchange of ozone between the stratosphere and the troposphere. We have identified an increase in the net transport of ozone into the troposphere in the future climate of 37%, although a decreased ozone lifetime means that the overall tropospheric burden decreases ...
William Collins
exaly   +2 more sources

Retrieval and Analysis of the Strongest Mixed Layer in the Troposphere

Atmosphere, 2020
In this article, Thorpe analysis, which often retrieves the characteristics of mixing in the free atmosphere from balloon sounding data, is applied to the data of the Constellation Observing System for Meteorology, Ionosphere and Climate (COSMIC).
Yang He, Zheng Sheng, Lesong Zhou
exaly   +3 more sources

Atmospheric photooxidation and ozonolysis of sabinene: reaction rate coefficients, product yields, and chemical budget of radicals [PDF]

Atmospheric Chemistry and Physics, 2023
The oxidation of sabinene by the hydroxyl radical (OH) and ozone (O3) was investigated under atmospherically relevant conditions in the atmospheric simulation chamber SAPHIR (Simulation of Atmospheric Photochemistry In a Large Reaction Chamber) at ...
J. Y. S. Pang, F. Berg, A. Novelli, B. Bohn, M. Färber, P. T. M. Carlsson, R. Dubus, G. I. Gkatzelis, F. Rohrer, S. Wedel, A. Wahner, H. Fuchs, H. Fuchs   +12 more
doaj   +1 more source

Air quality observations onboard commercial and targeted Zeppelin flights in Germany – a platform for high-resolution trace-gas and aerosol measurements within the planetary boundary layer [PDF]

Atmospheric Measurement Techniques, 2022
A Zeppelin airship was used as a platform for in situ measurements of greenhouse gases and short-lived air pollutants within the planetary boundary layer (PBL) in Germany.
R. Tillmann, G. I. Gkatzelis, F. Rohrer, B. Winter, C. Wesolek, T. Schuldt, A. C. Lange, P. Franke, E. Friese, M. Decker, R. Wegener, M. Hundt, O. Aseev, A. Kiendler-Scharr   +13 more
doaj   +1 more source

Experimental chemical budgets of OH, HO₂, and RO₂ radicals in rural air in western Germany during the JULIAC campaign 2019 [PDF]

Atmospheric Chemistry and Physics, 2023
Photochemical processes in ambient air were studied using the atmospheric simulation chamber SAPHIR at Forschungszentrum Jülich, Germany. Ambient air was continuously drawn into the chamber through a 50 m high inlet line and passed through the chamber ...
C. Cho, C. Cho, H. Fuchs, A. Hofzumahaus, F. Holland, W. J. Bloss, B. Bohn, H.-P. Dorn, M. Glowania, T. Hohaus, L. Liu, P. S. Monks, D. Niether, F. Rohrer, R. Sommariva, R. Sommariva, Z. Tan, R. Tillmann, A. Kiendler-Scharr, A. Wahner, A. Novelli   +20 more
doaj   +1 more source

Atmospheric photo-oxidation of myrcene: OH reaction rate constant, gas-phase oxidation products and radical budgets [PDF]

Atmospheric Chemistry and Physics, 2021
The photo-oxidation of myrcene, a monoterpene species emitted by plants, was investigated at atmospheric conditions in the outdoor simulation chamber SAPHIR (Simulation of Atmospheric PHotochemistry In a Large Reaction Chamber). The chemical structure of
Z. Tan, L. Hantschke, M. Kaminski, M. Kaminski, I.-H. Acir, I.-H. Acir, B. Bohn, C. Cho, H.-P. Dorn, X. Li, X. Li, A. Novelli, S. Nehr, S. Nehr, F. Rohrer, R. Tillmann, R. Wegener, A. Hofzumahaus, A. Kiendler-Scharr, A. Wahner, H. Fuchs   +20 more
doaj   +1 more source

Electrochemical sensors on board a Zeppelin NT: in-flight evaluation of low-cost trace gas measurements [PDF]

Atmospheric Measurement Techniques, 2023
In this work, we used a Zeppelin NT equipped with six sensor setups, each composed of four different low-cost electrochemical sensors (ECSs) to measure nitrogen oxides (NO and NO2), carbon monoxide, and Ox (NO2+O3) in Germany.
T. Schuldt, G. I. Gkatzelis, C. Wesolek, F. Rohrer, B. Winter, T. A. J. Kuhlbusch, A. Kiendler-Scharr, R. Tillmann   +7 more
doaj   +1 more source

Photooxidation of pinonaldehyde at ambient conditions investigated in the atmospheric simulation chamber SAPHIR [PDF]

Atmospheric Chemistry and Physics, 2020
The photooxidation of pinonaldehyde, one product of the α-pinene degradation, was investigated in the atmospheric simulation chamber SAPHIR under natural sunlight at low NO concentrations (<0.2 ppbv) with and without an added hydroxyl radical ...
M. Rolletter, M. Blocquet, M. Blocquet, M. Kaminski, M. Kaminski, B. Bohn, H.-P. Dorn, A. Hofzumahaus, F. Holland, X. Li, X. Li, F. Rohrer, R. Tillmann, R. Wegener, A. Kiendler-Scharr, A. Wahner, H. Fuchs   +16 more
doaj   +1 more source

Importance of isomerization reactions for OH radical regeneration from the photo-oxidation of isoprene investigated in the atmospheric simulation chamber SAPHIR [PDF]

Atmospheric Chemistry and Physics, 2020
Theoretical, laboratory, and chamber studies have shown fast regeneration of the hydroxyl radical (OH) in the photochemistry of isoprene, largely due to unimolecular reactions which were previously thought not to be important under atmospheric conditions.
A. Novelli, L. Vereecken, B. Bohn, H.-P. Dorn, G. I. Gkatzelis, G. I. Gkatzelis, G. I. Gkatzelis, A. Hofzumahaus, F. Holland, D. Reimer, F. Rohrer, S. Rosanka, D. Taraborrelli, R. Tillmann, R. Wegener, Z. Yu, Z. Yu, A. Kiendler-Scharr, A. Wahner, H. Fuchs   +19 more
doaj   +1 more source

Implementation of the MEGAN (v2.1) biogenic emission model in the ECHAM6-HAMMOZ chemistry climate model [PDF]

Geoscientific Model Development, 2017
A biogenic emission scheme based on the Model of Emissions of Gases and Aerosols from Nature (MEGAN) version 2.1 (Guenther et al., 2012) has been integrated into the ECHAM6-HAMMOZ chemistry climate model in order to calculate the emissions from ...
A.-J. Henrot, T. Stanelle, S. Schröder, C. Siegenthaler, D. Taraborrelli, M. G. Schultz   +5 more
doaj   +1 more source