A5074815627- Atmospheric Ozone and Climate
- Atmospheric and Environmental Gas Dynamics
- Atmospheric chemistry and aerosols
- Planetary Science and Exploration
- Spectroscopy and Laser Applications
- Astro and Planetary Science
- Space Science and Extraterrestrial Life
- Advanced Chemical Physics Studies
- Methane Hydrates and Related Phenomena
- Space Exploration and Technology
- Meteorological Phenomena and Simulations
- Atmospheric aerosols and clouds
- Ionosphere and magnetosphere dynamics
- Mercury impact and mitigation studies
Laboratory for Atmospheric and Space Physics
2022-2024
Khalifa University of Science and Technology
2022-2024
University of Colorado Boulder
2022
Old Dominion University
2017-2021
University of Waterloo
2019
Very short-lived substances (VSLS), including dichloromethane (CH2Cl2), chloroform (CHCl3), perchloroethylene (C2Cl4), and 1,2-dichloroethane (C2H4Cl2), are a stratospheric chlorine source therefore contribute to ozone depletion. We quantify trends from these VSLS (VSLCltot) using chemical transport model atmospheric measurements, novel high-altitude aircraft data the NASA VIRGAS (2015) POSIDON (2016) missions. estimate VSLCltot increased 69 (±14) parts per trillion (ppt) Cl in 2000 111...
Abstract Observations by the Emirates eXploration Imager (EXI) on‐board Mars Mission are used to characterize diurnal, seasonal, and spatial behavior of aphelion cloud belt during Year 36 L S ∼ 30°–190°. Building from previous work with Color (MARCI) onboard Reconnaissance Orbiter, we retrieve water ice extinction optical depth ( τ ) an uncertainty ±0.0232 (excluding particle size effects). We connect EXI MARCI using radiance . Zonal meridional diurnal trends analyzed over 6–18 hr Local True...
Earth and Space Science Open Archive This preprint has been submitted to is under consideration at Geophysical Research Letters. ESSOAr a venue for early communication or feedback before peer review. Data may be preliminary.Learn more about preprints preprintOpen AccessYou are viewing the latest version by default [v1]Diurnal variations in aphelion cloud belt as observed Emirates Exploration Imager (EXI)AuthorsMichael J.WolffiDAntonFernandoiDMichael...
The formation of water ice clouds can significantly influence the Martian climate, although atmosphere contains low vapor concentrations compared to terrestrial levels. lower exhibits three global cloud systems: Aphelion belt (ACB), polar hoods (PHs), and orographic clouds. These are associated with topography, solar heating, atmospheric circulation, wave activity, local convection. An appreciable amount research has been conducted on first two regimes (ACB PHs) very little attention given...
The NH radical is important in astronomy as it observed cool stars and the interstellar medium.A new line list for A 3 Π -X Σ -electronic transition has been prepared using positions from literature calculated intensities.High level ab-initio calculations are performed with Molpro to obtain A-X dipole moment function.Potential energy curves strengths by Le Roy's RKR LEVEL programs.Line intensities Einstein values were Western's PGOPHER program after converting Hund's case (b) output of (a)...
Near global ozone isotopologue distributions have been determined from infrared solar occultation measurements of the Atmospheric Chemistry Experiment (ACE) satellite mission.ACE are made with a high resolution Fourier transform spectrometer.Annual and seasonal latitudinal fractionation (δ value) isotopologues 16 O 18 O, 17 were obtained.Asymmetric ( O) shows higher compared to symmetric O).The maximum occurs in tropical stratosphere as expected.An enhancement heavy is also seen Antarctic...
A new line list for the A3Π - X3Σ- electronic transition of NH has been prepared using positions from literature and calculated intensities. High level ab initio calculations were performed with MOLPRO program to obtain X dipole moment function. Potential energy curves strengths Le Roy's RKR1 LEVEL programs. Line intensities Einstein values Western's PGOPHER after converting Hund's case (b) output (a) input needed PGOPHER. The Herman- Wallis effect is included in bands levels v' = 0 2 v'' 6....