Results 41 to 50 of about 746 (167)

Ultrathin Tropical Tropopause Clouds (UTTCs): I. Cloud morphology and occurrence [PDF]

Atmospheric Chemistry and Physics, 2003
Subvisible cirrus clouds (SVCs) may contribute to dehydration close to the tropical tropopause. The higher and colder SVCs and the larger their ice crystals, the more likely they represent the last efficient point of contact of the gas phase with the ...
Th. Peter, B. P. Luo, M. Wirth, C. Kiemle, H. Flentje, V. A. Yushkov, V. Khattatov, V. Rudakov, A. Thomas, S. Borrmann, G. Toci, P. Mazzinghi, J. Beuermann, C. Schiller, F. Cairo, G. Di Donfrancesco, A. Adriani, C. M. Volk, J. Strom, K. Noone, V. Mitev, R. A. MacKenzie, K. S. Carslaw, T. Trautmann, V. Santacesaria, L. Stefanutti   +25 more
doaj  

Tropical Cyclones Reduce Ozone in the Tropopause Region Over the Western Pacific: An Analysis of 18 Years Ozonesonde Profiles

Earth's Future, 2021
Typhoons play a key role in causing low ozone concentrations in the upper troposphere and lower stratosphere (UTLS) over the western Pacific. In this study, 18 years records (2000–2017) of balloon‐borne ozone measurements in Hong Kong (22.3°N, 114.2°E ...
Dan Li, Bärbel Vogel, Rolf Müller, Jianchun Bian, Gebhard Günther, Martin Riese   +5 more
doaj   +1 more source

Coordinating Observational Campaigns to Study the Tropical Tropopause Layer [PDF]

Eos, Transactions American Geophysical Union, 2013
AbstractThe tropical tropopause layer (TTL) is the dominant region for entry of tropospheric air into the global stratosphere. Despite significant theoretical advances and a rapidly growing archive of satellite data, important science questions related to the control of humidity and the chemical composition of air entering the stratosphere remain ...
Gary A. Morris, Andrew Gettelman, Fumio Hasebe   +2 more
openaire   +1 more source

A multimodel intercomparison study of variable‐resolution global models with grid refinement over the Arctic and Antarctic

Quarterly Journal of the Royal Meteorological Society, EarlyView.
We document the protocol and first results from the first ever coordinated multimodel variable‐resolution experiment set with refinement over the polar regions. We find that the refinement generally yields model‐dependent effects. The most consistent improvement is an amelioration of the upper‐level cold bias in the polar regions that translates into ...
Lise Seland Graff, Dörthe Handorf, Raphael Köhler, Xavier Levine, René R. Wijngaard, Gareth J. Marshall, Alexey Yu. Karpechko, Ryan S. Williams, Priscilla A. Mooney   +8 more
wiley   +1 more source

Seasonality and extent of extratropical TST derived from in-situ CO measurements during SPURT [PDF]

Atmospheric Chemistry and Physics, 2004
We present airborne in-situ trace gas measurements which were performed on eight campaigns between November 2001 and July 2003 during the SPURT-project (SPURenstofftransport in der Tropopausenregion, trace gas transport in the tropopause region).
P. Hoor, P. Hoor, C. Gurk, D. Brunner, M. I. Hegglin, H. Wernli, H. Wernli, H. Fischer   +7 more
doaj  

Ultrathin Tropical Tropopause Clouds (UTTCs): II. Stabilization mechanisms [PDF]

Atmospheric Chemistry and Physics, 2003
Mechanisms by which subvisible cirrus clouds (SVCs) might contribute to dehydration close to the tropical tropopause are not well understood. Recently Ultrathin Tropical Tropopause Clouds (UTTCs) with optical depths around 10-4 have been detected in ...
B. P. Luo, Th. Peter, H. Wernli, S. Fueglistaler, M. Wirth, C. Kiemle, H. Flentje, V. A. Yushkov, V. Khattatov, V. Rudakov, A. Thomas, S. Borrmann, G. Toci, P. Mazzinghi, J. Beuermann, C. Schiller, F. Cairo, G. Di Don-Francesco, A. Adriani, C. M. Volk, J. Strom, K. Noone, V. Mitev, R. A. MacKenzie, K. S. Carslaw, T. Trautmann, V. Santacesaria, L. Stefanutti   +27 more
doaj  

High supersaturation inside cirrus in well‐developed tropical tropopause layer over Indonesia

Geophysical Research Letters, 2012
The relationship between relative humidity and cirrus clouds in the tropical tropopause layer (TTL) is investigated using balloon‐borne cryogenic frostpoint hygrometers (CFH) and quasi‐collocated measurements of space‐borne Cloud‐Aerosol Lidar with ...
Y. Inai, T. Shibata, M. Fujiwara, F. Hasebe, H. Vömel   +4 more
doaj   +1 more source

Terrestrial Analogs to Titan for Geophysical Research

Reviews of Geophysics, Volume 64, Issue 2, June 2026.
Abstract Saturn's moon Titan exhibits remarkable parallels to the Earth in many geophysical and geological processes not found elsewhere in the solar system at the present day. These include a nitrogen atmosphere with a condensible gas—methane—replacing the Earth's water, leading to an active meteorology with rainfall and surface manifestations ...
Conor A. Nixon, Samuel Birch, Audrey Chatain, Charles Cockell, Kendra K. Farnsworth, Peter M. Higgins, Stéphane Le Mouélic, Rosaly M. C. Lopes, Michael J. Malaska, Mohit Melwani Daswani, Kelly E. Miller, Catherine D. Neish, Olaf G. Podlaha, Jani Radebaugh, Lauren R. Schurmeier, Ashley Schoenfeld, Krista M. Soderlund, Anezina Solomonidou, Christophe Sotin, Nicholas A. Teanby, Tetsuya Tokano, Steven D. Vance   +21 more
wiley   +1 more source

Attributing Upper‐Tropospheric Warm Biases in CMIP6 Models to Ice Cloud‐Radiation Interaction Deficiencies Over Tropical Oceans

Geophysical Research Letters, Volume 53, Issue 9, 16 May 2026.
Abstract We assess the impact of hydrometeor radiative effects on tropical and subtropical Pacific air temperature anomalies (TAA) using Coupled Model Intercomparison Project Phase 6 (CMIP6) model simulations and satellite data. CMIP6 models are grouped by their treatment of frozen hydrometeors: SON2 (explicit cloud and falling ice), SON1 (simplified),
J.‐L. F. Li, Wei‐Liang Lee, Kuan‐Man Xu, J. H. Jiang, Yi‐Hui Wang, Yu‐Cian Tsai, S‐P. Ho, Qing Yue, Graeme Stephens, Jia‐Yuh Yu, Huiwen Chuang   +10 more
wiley   +1 more source

Cirrus cloud-temperature interactions in the tropical tropopause layer: a case study [PDF]

Atmospheric Chemistry and Physics, 2011
Thin cirrus clouds in the Tropical Tropopause Layer (TTL) have important ramifications for radiative transfer, stratospheric humidity, and vertical transport.
J. R. Taylor, W. J. Randel, E. J. Jensen
doaj   +1 more source