Results 41 to 50 of about 239,563 (249)

Observation of mesospheric air inside the arctic stratospheric polar vortex in early 2003 [PDF]

open access: yes, 2005
During several balloon flights inside the Arctic polar vortex in early 2003, unusual trace gas distributions were observed, which indicate a strong influence of mesospheric air in the stratosphere.
Levin, Ingeborg   +37 more
core   +1 more source

Heavy hydrogen in the stratosphere [PDF]

open access: yes, 2003
We report measurements of the deuterium content of molecular hydrogen (H2) obtained from a suite of air samples that were collected during a stratospheric balloon flight between 12 and 33 km at 40º N in October 2002. Strong deuterium enrichments of up to
Rhee, T.S.   +10 more
core   +1 more source

Time dependent profile retrieval of UV/vis absorbing radicals from balloon-borne limb measurements – a case study on NO2 and O3 [PDF]

open access: yesAtmospheric Measurement Techniques, 2010
A new "Bayesian" minimization algorithm for the retrieval of the diurnal variation of UV/vis absorbing radicals (O3, NO2, BrO, OClO and HONO) from balloon-borne limb scattered skylight observations is discussed.
R. Schofield   +9 more
doaj   +1 more source

PMC Turbo: Studying Gravity Wave and Instability Dynamics in the Summer Mesosphere Using Polar Mesospheric Cloud Imaging and Profiling From a Stratospheric Balloon

open access: yesJournal of Geophysical Research - Atmospheres, 2019
The Polar Mesospheric Cloud Turbulence (PMC Turbo) experiment was designed to observe and quantify the dynamics of small‐scale gravity waves (GWs) and instabilities leading to turbulence in the upper mesosphere during polar summer using instruments ...
D. Fritts   +16 more
semanticscholar   +1 more source

The stratospheric quasi-biennial oscillation observed in the semidiurnal ground pressure data [PDF]

open access: yesAnnales Geophysicae, 1995
Ground pressure observations made at Macao (22°N, 113°E) from 1953 to 1991 are analyzed and compared with the stratospheric quasi-biennial oscillation (QBO) data obtained during the same interval.
H. Teitelbaum, F. Vial, P. Bauer
doaj   +1 more source

Observations of meteoric material and implications for aerosol nucleation in the winter Arctic lower stratosphere derived from in situ particle measurements [PDF]

open access: yes, 2005
Number concentrations of total and non-volatile aerosol particles with size diameters >0.01 μm as well as particle size distributions (0.4–23 μm diameter) were measured in situ in the Arctic lower stratosphere (10–20.5 km altitude). The measurements were
Curtius, Joachim   +45 more
core   +1 more source

Seasonal and annual variations of aerosol concentrations in the troposphere and stratosphere over Syowa Station observed by a balloon-borne optical particle counter

open access: yesAntarctic Record, 2010
This report summarizes observations of tropospheric and stratospheric aerosols by a balloon-borne optical particle counter (Aerosol sonde) performed at Syowa Station from April 1997 to January 2008.
Nobuhiko Kizu   +4 more
doaj   +1 more source

Validation of version-4.61 methane and nitrous oxide observed by MIPAS [PDF]

open access: yes, 2009
peer reviewedThe ENVISAT validation programme for the atmospheric instruments MIPAS, SCIAMACHY and GOMOS is based on a number of balloon-borne, aircraft, satellite and ground-based correlative measurements.
S. Payan   +114 more
core   +1 more source

Design of Attitude Control System for Stratospheric Balloon Gondolas by Sliding Mode Control

open access: yesIOP Conference Series: Materials Science and Engineering, 2019
This paper reports consideration of efficient design method for the azimuthal-attitude control of stratospheric balloon gondolas utilizing only a motorized pivot.
T. Nakano
semanticscholar   +1 more source

Chemical ozone loss in the Arctic winter 1991–1992 [PDF]

open access: yes, 2007
Chemical ozone loss in winter 1991–1992 is recalculated based on observations of the HALOE satellite instrument, Version 19, ER-2 aircraft measurements and balloon data.
Tilmes, S.   +25 more
core   +1 more source

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