Published in arXiv preprint arXiv:1605.03487
A key outstanding question in Martian science is are the polar caps gaining or losing mass and what are the implications for past, current and future climate? To address this question, we use observations from the Compact Reconnaissance Imaging Spectrometer for Mars (CRISM) of the north polar cap during late summer for multiple Martian years, to m...
The Nili Fossae region is the site of a number of proposed Landing Sites for the Mars 2020 Rover. A distinguishing feature of many of these sites is the access to large exposures of carbonate (Ehlmann et al. 2008). Serpentinization has been proposed as a formation mechanism of these carbonates, including carbonated (Brown et al. 2010, Viviano, et a...
Published in Icarus
Spacecraft imaging of Mars south polar region during mid-southern summer of Mars year 28 (2007) observed bright halo-like features surrounding many of the pits, scarps and slopes of the heavily eroded carbon dioxide ice of the South Polar Residual Cap (SPRC). These features had not been observed before, and have not been observed since. We report ...
Published in Journal of Quantitative Spectroscopy and Radiative Transfer
We present the scientific case to build a multiple-wavelength, active, near-infrared (NIR) instrument to measure the reflected intensity and polarization characteristics of backscattered radiation from planetary surfaces and atmospheres. We focus on the ability of such an instrument to enhance, potentially revolutionize, our understanding of climat...
Published in arXiv preprint arXiv:1501.03802
We report on the interannual variability of the atmospheric ice/dust cycle in the Martian polar regions for Mars Years 28-30. We used CRISM emission phase function measurements to derive atmospheric dust optical depths and data from the MARCI instrument to derive atmospheric water ice optical depths. We have used autocorrelation and cross correlati...
Published in arXiv preprint arXiv:1501.02040
We use observations from the Compact Reconnaissance Imaging Spectrometer for Mars (CRISM) of the north polar cap during late summer for two Martian years, to monitor the complete summer cycle of albedo and water ice grain size in order to place quantitative limits of the amount of water ice deposited in late summer.
Published in Icarus
Published in JOSA A
Symmetry relationships for optical observations of matter generally fall into several common scattering geometries. The “planetary” configuration is preferred by observers of extraterrestrial planets,“laboratory” observations are performed in the biomedical research field, and the LIDAR configuration is preferred by those using lasers to probe opti...
Published in American Mineralogist
This study of the spectral properties of Ca-sulfates was initiated to support remote detection of these minerals on Mars. Gypsum, bassanite, and anhydrite are the currently known forms of Ca-sulfates. They are typically found in sedimentary evaporites on Earth, but can also form via reaction of acidic fluids associated with volcanic activity. Refle...
Published in arXiv preprint arXiv:1409.5835
Symmetry relationships for optical observations of matter generally fall into several common scattering geometries. The planetary configuration is preferred among a group of observers of extraterrestrial planets, laboratory observations are performed in the biomedical research field and the LIDAR configuration is preferred among those using lasers ...
Published in American Mineralogist
Published in arXiv preprint arXiv:1307.5096
Scattering by particles significantly smaller than the wavelength is an important physical process in the rocky bodies in our solar system and beyond. A number of observations of spectral bluing (referred to in those papers as" Rayleigh scattering") on planetary surfaces have been recently reported, however, the necessary mathematical modeling of t...
Published in Journal of Geophysical Research: Planets
Published in Heart & Lung: The Journal of Acute and Critical Care
Purpose INTERMACS data shows that few non-inotrope dependent (NID) patients (pts) with advanced heart failure (HF) are referred for Left Ventricular Assist Devices (LVAD) as Destination Therapy (DT). We sought to understand if there was consensus amongst experts with regards to referral of NID HF pts for DT. Background Criteria for the identificati...
Published in LPSC XXXXIV
Published in LPSC XXXXIV
Published in LPSC XXXXIV. LPI
