Results 51 to 60 of about 49,964 (180)

Tropospheric products as a signal of interest – overview of troposphere sensing techniques

, 2020
The microwave signals passing through the troposphere are delayed by refraction. Its high variations, both in time and space, are caused mainly by water vapor. The tropospheric delay used to be considered only as a source of error that needed to be removed. Nowadays, these delays are also a source of interest.
Wilgan, K., Rohm, W., Bosy, J., Geiger, A., Siddique, M., Wickert, J., Dick, G.   +6 more
openaire   +5 more sources

Oxalic acid as a heterogeneous ice nucleus in the upper troposphere and its indirect aerosol effect [PDF]

, 2006
Zobrist B, Marcolli C, Koop T, et al. Oxalic acid as a heterogeneous ice nucleus in the upper troposphere and its indirect aerosol effect. ATMOSPHERIC CHEMISTRY AND PHYSICS.
Koop, Thomas, Cziczo, Daniel J., Corti, Thierry, Murphy, D. M., Fueglistaler, Stephan, B. Zobrist, P. K. Hudson, Koop, T., Hudson, P.K., Koop, Thomas ; https://orcid.org/, Krieger, U. K., Corti, T., Lohmann, Ulrike, Thomson, D. S., U. K. Krieger, Marcolli, C., D. S. Thomson, D. J. Cziczo, T. Corti, T. Peter, U. Lohmann, Lohmann, U., Peter, Thomas, T. Koop, Luo, Beiping P., Murphy, Daniel M., A. A. Zardini, Krieger, Ulrich; id_orcid, Luo, B. P., Hudson, P. K., Thomson, D.S., B. P. Luo, Zardini, A., Cziczo, D. J., Zardini, A. A., Zardini, Alessandro A., D. M. Murphy, C. Marcolli, S. Fueglistaler, Peter, T., Marcolli, Claudia, Zobrist, Bernhard, Zobrist, B., Fueglistaler, S.   +43 more
core   +2 more sources

Estimation of Atmospheric Path Delays in TerraSAR-X Data using Models vs. Measurements

Sensors, 2008
Spaceborne synthetic aperture radar (SAR) measurements of the Earth’s surface depend on electromagnetic waves that are subject to atmospheric path delays, in turn affecting geolocation accuracy.
Donat Perler, Michael Jehle, David Small, Adrian Schubert, Erich Meier   +4 more
doaj   +1 more source

Investigation of the α-pinene photooxidation by OH in the atmospheric simulation chamber SAPHIR [PDF]

Atmospheric Chemistry and Physics, 2019
The photooxidation of the most abundant monoterpene, α-pinene, by the hydroxyl radical (OH) was investigated at atmospheric concentrations in the atmospheric simulation chamber SAPHIR.
M. Rolletter, M. Kaminski, M. Kaminski, I.-H. Acir, I.-H. Acir, B. Bohn, H.-P. Dorn, X. Li, X. Li, A. Lutz, S. Nehr, S. Nehr, F. Rohrer, R. Tillmann, R. Wegener, A. Hofzumahaus, A. Kiendler-Scharr, A. Wahner, H. Fuchs   +18 more
doaj   +1 more source

Transport and mixing between airmasses in cold frontal regions during Dynamics and Chemistry of Frontal Zones (DCFZ) [PDF]

, 2003
The passage of two cold front systems over the United Kingdom are compared and contrasted, using the results of a detailed aircraft and ground-based study.
Barjat, H, Dewey, K., Kent, J., Brough, N, Kent, J, Law, K. S., Schmitgen, S., Esler, J. G., Barjat, H., Dewey, K, Esler, JG, Schmitgen, S, Haynes, P. H., Haynes, PH, Brough, N., Law, KS   +15 more
core   +1 more source

Clouds, photolysis and regional tropospheric ozone budgets. [PDF]

, 2009
We use a three-dimensional chemical transport model to examine the shortwave radiative effects of clouds on the tropospheric ozone budget. In addition to looking at changes in global concentrations as previous studies have done, we examine changes in ...
Wild, Oliver, Voulgarakis, A., Pyle, J. A., Savage, N. H., Carver, G. D.   +4 more
core   +4 more sources

CARIBIC observations of gaseous mercury in the upper troposphere and lower stratosphere

E3S Web of Conferences, 2013
A unique set of gaseous mercury measurements in the upper troposphere and lower stratosphere (UT/LS) has been obtained during the monthly CARIBIC (www.caribic-atmospheric.com) flights since May 2005.
Slemr F., Ebinghaus R., Weigelt A., Kock H. H., Brenninkmeijer C. A. M., Schuck T., Hermann M., Zahn A., Velthoven P. van, Martinsson B., Ziereis H.   +10 more
doaj   +1 more source

Tropospheric Ozone at Northern Mid-Latitudes: Modeled and Measured Long-Term Changes

Atmosphere, 2017
In this paper, we investigate why current state-of-the-art chemistry-climate models underestimate the tropospheric ozone increase from the 1950s to the 1990s by approximately 50%.
Johannes Staehelin, Fiona Tummon, Laura Revell, Andrea Stenke, Thomas Peter   +4 more
doaj   +1 more source

Downward Control from Lower Stratosphere? [PDF]

, 2005
The concept of downward control proposes a mechanism for the impact of the stratospheric circulation on the troposphere. Momentum forcing at upper-stratospheric levels induces a meridional circulation that eventually reaches the surface.
Egger, Joseph, Hoinka, Klaus-Peter
core   +1 more source

The potential of drone observations to improve air quality predictions by 4D-Var [PDF]

Atmospheric Chemistry and Physics
Vertical profiles of atmospheric pollutants, acquired by uncrewed aerial vehicles (UAVs, known as drones), represent a new type of observation that can help to fill the existing observation gap in the planetary boundary layer (PBL). This article presents
H. Erraji, P. Franke, A. Lampert, T. Schuldt, R. Tillmann, A. Wahner, A. C. Lange   +6 more
doaj   +1 more source