Results 61 to 70 of about 700 (138)

Mixing processes and exchanges in the tropical and the subtropical UT/LS [PDF]

Atmospheric Chemistry and Physics, 2009
Both in situ measurements and satellite observations indicate evidence of mixing in the upper troposphere (UT) and the lower-stratosphere (LS). In this study, the measurements performed during the Pre-AVE and Costa-Rica AVE campaigns are analysed with ...
R. James, B. Legras
doaj  

The SCOUT-O3 Darwin Aircraft Campaign: rationale and meteorology [PDF]

Atmospheric Chemistry and Physics, 2009
An aircraft measurement campaign involving the Russian high-altitude aircraft M55 Geophysica and the German DLR Falcon was conducted in Darwin, Australia in November and December 2005 as part of the European integrated project SCOUT-O3.
D. Brunner, P. Siegmund, P. T. May, L. Chappel, C. Schiller, R. Müller, T. Peter, S. Fueglistaler, A. R. MacKenzie, A. Fix, H. Schlager, G. Allen, A. M. Fjaeraa, M. Streibel, N. R. P. Harris   +14 more
doaj  

Ice nucleation and cloud microphysical properties in tropical tropopause layer cirrus [PDF]

Atmospheric Chemistry and Physics, 2010
In past modeling studies, it has generally been assumed that the predominant mechanism for nucleation of ice in the uppermost troposphere is homogeneous freezing of aqueous aerosols.
E. J. Jensen, L. Pfister, T.-P. Bui, P. Lawson, D. Baumgardner   +4 more
doaj  

Constraining the Stratospheric Sulfate Budget in Global Models: Insights From In Situ OCS Measurements During 2023 SABRE and Comparison With Satellite, Balloon and Surface Data

Geophysical Research Letters
In situ carbonyl sulfide (OCS) measurements from the Stratospheric Aerosol processes, Budget and Radiative Effects (SABRE) 2023 airborne campaign are used to evaluate the sulfate budget in the Arctic stratosphere during boreal winter.
Colin Gurganus, Ewa M. Bednarz, Andrew Rollins, Eleanor Waxman, Eric Ray, Eric Hintsa, Fred Moore, David Nance, Brad Hall, Stephen A. Montzka, Isaac Vimont, Joshua P. Schwarz, Samantha DeLone, Steve Ciciora, Sophie Abou‐Rizk, Jun Zhang, Troy Thornberry   +16 more
doaj   +1 more source

Indications of thin cirrus clouds in the stratosphere at mid-latitudes [PDF]

Atmospheric Chemistry and Physics, 2005
This study is devoted to the possible presence of cirrus clouds in the stratosphere. Three months of lidar data collected in the south of France (44° N) for detection of stratospheric cirrus are carefully analyzed. Most of the cirrus clouds appear to
P. Keckhut, A. Hauchecorne, S. Bekki, A. Colette, C. David, J. Jumelet   +5 more
doaj  

The observation of nitric acid-containing particles in the tropical lower stratosphere [PDF]

Atmospheric Chemistry and Physics, 2006
Airborne in situ measurements over the eastern Pacific Ocean in January 2004 have revealed a new category of nitric acid (HNO3)-containing particles in the tropical lower stratosphere.
P. J. Popp, P. J. Popp, T. P. Marcy, T. P. Marcy, E. J. Jensen, B. Kärcher, D. W. Fahey, R. S. Gao, T. L. Thompson, K. H. Rosenlof, E. C. Richard, E. C. Richard, E. C. Richard, R. L. Herman, E. M. Weinstock, J. B. Smith, R. D. May, H. Vömel, J. C. Wilson, A. J. Heymsfield, M. J. Mahoney, A. M. Thompson   +21 more
doaj  

Contribution of mixing to upward transport across the tropical tropopause layer (TTL) [PDF]

Atmospheric Chemistry and Physics, 2007
During the second part of the TROCCINOX campaign that took place in Brazil in early 2005, chemical species were measured on-board the high-altitude research aircraft Geophysica (ozone, water vapor, NO, NO_y, CH<sub>4</sub ...
P. Konopka, G. Günther, R. Müller, F. H. S. dos Santos, C. Schiller, F. Ravegnani, A. Ulanovsky, H. Schlager, C. M. Volk, S. Viciani, L. L. Pan, D.-S. McKenna, M. Riese   +12 more
doaj  

Water Vapor, Clouds, and Saturation in the Tropical Tropopause Layer. [PDF]

J Geophys Res Atmos, 2019
Schoeberl MR, Jensen EJ, Pfister L, Ueyama R, Wang T, Selkirk H, Avery M, Thornberry T, Dessler AE.   +8 more
europepmc   +1 more source

Microphysical Properties of Tropical Tropopause Layer Cirrus. [PDF]

J Geophys Res Atmos, 2018
Woods S, Lawson RP, Jensen E, Bui TP, Thornberry T, Rollins A, Pfister L, Avery M.   +7 more
europepmc   +1 more source

Physical Processes Controlling the Vertical and Longitudinal Distributions of Relative Humidity in the Tropical Tropopause Layer Over the Pacific. [PDF]

J Geophys Res Atmos, 2017
Jensen EJ, Thornberry T, Rollins A, Ueyama R, Pfister L, Bui TV, Diskin GS, DiGangi JP, Hintsa E, Gao RS, Woods S, Lawson RP, Pittman J.   +12 more
europepmc   +1 more source