Now showing items 201-210 of 269
An Assessment of HOx Chemistry in the Tropical Pacific Boundary Layer: Comparison of Model Simulations with Observations Recorded during PEM Tropics A
(Kluwer Academic Publishers; Springer Science+Business Media, 2001-03)
Reported are the results from a comparison of OH,H 2 O 2 CH 3 OOH, and O 3 observationswithmodel predictions based on current HO x –CH 4 reaction mechanisms. The field observations are thoserecorded during the NASA GTE ...
Solar radiation incident on the Martian surface
(Springer-Verlag, 1979-03)
Calculations indicate that the maximum daily solar radiation reaching the Martian surface is about 325 cal/cm 2 during southern hemisphere summer at latitude of about 40°S. In the ultraviolet region of the spectrum, the ...
Comparison of methods for particulate phase mercury analysis: sampling and analysis
(Springer-Verlag, 2002-11)
Accurate and reliable sampling and analysis of mercury forms is an overriding aim of any atmospheric monitoring effort which seeks to understand the fate and transport of the metal in the environment. Although a fraction ...
Kinetic studies of the deactivation of O 2 ( 1 Σ g + ) and O( 1 D)
(John Wiley & Sons, Inc., 1990-12)
The kinetics of the deactivation of O 2 ( 1 Σ g + ) is studied in real time. O 2 ( 1 Σ g + ) is generated in this system by the O( 1 D) + O 2 reaction following O 3 laser flash photolysis in the presence of excess ...
ACE Observations of the Bastille Day 2000 Interplanetary Disturbances
(Kluwer Academic Publishers; Springer Science+Business Media, 2001-12)
We present ACE observations for the six-day period encompassing the Bastille Day 2000 solar activity. A high level of transient activity at 1 AU, including ICME-driven shocks, magnetic clouds, shock-accelerated energetic ...
Determination of aerosol strong acidity losses due to interactions of collected particles: Results from laboratory and field studies
(Elsevier, 1992-04)
Existing methods of measuring atmospheric aerosol strong acidity adequately prevent neutralization of fine-particle acidity by removing course alkaline particles and gaseous ammonia from air samples. However, these techniques ...
Dusty cometary atmospheres
(Elsevier, 1987)
This paper summarizes our present understanding of the physical processes controlling the dust and gas production of cometary nuclei and the evolution of the dusty gas flow in the inner coma. Special emphasis is being made ...
Hydrocarbons and eddy mixing in Neptune's atmosphere
(Elsevier, 1992-11)
The most recent analysis of the Voyager ultraviolet solar occultation observations at Neptune indicates a methane mixing ratio 1-10 times above saturation in the lower stratosphere, unlike the value of 500-1000 times ...
Recent advances in model calculations of the Venus ionosphere
(Elsevier, 1985)
Our understanding of the physical and chemical processes which control the behavior of the Venus ionosphere has advanced significantly during the last few years. These advances are the result of a still growing data base ...