A5009139344- Atmospheric Ozone and Climate
- Atmospheric chemistry and aerosols
- Atmospheric aerosols and clouds
- Radio Astronomy Observations and Technology
- Atmospheric and Environmental Gas Dynamics
- Ionosphere and magnetosphere dynamics
- Remote Sensing and LiDAR Applications
- Meteorological Phenomena and Simulations
- Geophysics and Gravity Measurements
- Astronomy and Astrophysical Research
- Planetary Science and Exploration
- GNSS positioning and interference
- Forest Management and Policy
- Forest Ecology and Biodiversity Studies
- Solar and Space Plasma Dynamics
- Spacecraft Design and Technology
- Astronomical Observations and Instrumentation
- Spacecraft and Cryogenic Technologies
- Astrophysics and Cosmic Phenomena
- Philosophy and History of Science
- Gamma-ray bursts and supernovae
- Rangeland and Wildlife Management
- Forest ecology and management
- Astrophysics and Star Formation Studies
- Scientific Research and Discoveries
SUNY College of Environmental Science and Forestry
2020-2023
State University of New York
2020-2023
York University
2020-2023
Purchase College
2022
California State University, Bakersfield
2020
Washington State University
2020
University of Idaho
2020
University of Colorado Colorado Springs
2020
University of Colorado Boulder
2004-2019
California Institute of Technology
1999-2014
In situ measurements of the chemical composition individual aerosol particles at altitudes between 5 and 19 kilometers reveal that upper tropospheric aerosols often contained more organic material than sulfate. Although stratospheric primarily consisted sulfuric acid water, many also meteoritic material. Just above tropopause, small amounts mercury were found in over half analyzed. Overall, there was tremendous variety composition. One measure this diversity is least 45 elements detected...
Conceptual Introduction and Historical Contexts * Human Change: The Ultimate Ethical Frontier A Brief History of Ideas Foundations the Future Scientific Psychology Studies Learning Development Cognitive Sciences: Revolutions Evolutions Constructivism Self-Organization Evolution Psychological Emotional Processes Experience Self in Process Psychotherapy: Principles, Techniques, Experiences Principles Developmental Psychotherapy Selected Techniques for Encouraging Personal Change Person...
Black carbon (BC) is the dominant aerosol absorber of solar radiation in atmosphere and an important component anthropogenic climate forcing. BC's role strongly dependent on its physical state, which can influence way that BC particles may act as ice cloud nuclei, well they interact with radiation. In situ measurements made a single‐particle soot photometer flown NASA high‐altitude research aircraft show mass size individual tropics, their propensity to be found mixed additional materials....
We report on in situ and remote sensing measurements of ice particles the tropical stratosphere found during Geophysica campaigns TROCCINOX SCOUT‐O3. show that deep convective systems penetrated deposited at altitudes reaching 420 K potential temperature. These events had a hydrating effect lower due to evaporation particles. In contrast, there were no signs convectively induced dehydration stratosphere.
Definitions of the extratropical tropopause are examined from perspective chemical composition. Fine‐scale measurements temperature, ozone, carbon monoxide, and water vapor approximately 70 aircraft flights, with ascending descending crossings near 40°N 65°N, used in this analysis. Using relationship stratospheric tracer O 3 tropospheric CO, we address issues sharpness where transitions troposphere to stratosphere occur terms Tracer relationships indicate that mixing air masses occurs...
Although the social processes in scientific inquiry have received extensive analysis, psychologists devoted relatively little attention to thoughts, feelings, and actions of individual scientist. This neglect has resulted an unfortunate failure evaluate long held assumptions about scientist behaviour. article reviews sociological, archival, recent experimental evidence bearing on psychology These data suggest that correspondence between behaviour accepted 'ideals' may be far less than been...
We observed a plume of air highly enriched in carbon monoxide and particles the stratosphere at altitudes up to 15.8 km. It can be unambiguously attributed North American forest fires. This demonstrates an extra‐tropical direct transport path from planetary boundary layer several kilometers deep into stratosphere, which is not fully captured by large‐scale atmospheric models. process indicates that stratospheric ozone could sensitive changes burning associated with climatic warming.
This work describes aircraft‐based lidar observations of thin cirrus clouds at the tropical tropopause in central Pacific obtained during Tropical Ozone Transport Experiment/Vortex Experiment (TOTE/VOTE) December 1995 and February 1996. Thin were found on each four flights which penetrated within 15° equator 200–210 east longitude. South 15°N, detected above aircraft about 65% time that data available. The altitudes these exceeded 18 km times. could be divided into two basic types:...
At three successive days at the end of January 2000 Deutsches Zentrum für Luft‐ und Raumfahrt (DLR) airborne lidar Ozone Lidar Experiment explored mountain‐wave‐induced polar stratospheric clouds above Scandinavian mountain ridge. Global analyses and mesoscale modeling are applied to explain their complex internal structure day‐to‐day variability. Depending on synoptical‐scale meteorological conditions, temperature anomalies different amplitude horizontal extent generated by upward...
Abstract An airborne microwave temperature profiler (MTP) was deployed during the Texas 2000 Air Quality Study (TexAQS-2000) to make measurements of boundary layer thermal structure. objective technique developed and tested for estimating mixed (ML) height from MTP vertical profiles. The identifies ML as a threshold increase potential its minimum value within layer. To calibrate evaluate usefulness this approach, coincident estimates radiosondes, radar wind profilers, an aerosol backscatter...
During the July 2002 Cirrus Regional Study of Tropical Anvils and Layers‐Florida Area Experiment (CRYSTAL‐FACE), flights a WB‐57F aircraft revealed mixing ratios nitric oxide 10–50 times background over distances 25–175 km in anvils thunderstorms clear air downwind storm systems due to lightning activity possible transport from boundary layer. Estimates total mass NO x injected into middle upper troposphere differed considerably for moderately versus highly electrically active system as...
The redistribution of HNO 3 via uptake and sedimentation by cirrus cloud particles is considered an important term in the upper tropospheric budget reactive nitrogen. Numerous encounters NASA WB‐57F high‐altitude research aircraft during Cirrus Regional Study Tropical Anvils Layers‐Florida Area Experiment (CRYSTAL‐FACE) were accompanied observation condensed‐phase with NOAA chemical ionization mass spectrometer. instrument measures two independent channels detection connected to separate...
view Abstract Citations (93) References (32) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Evidence for Unseen Companions around T Tauri Stars Marsh, Kenneth A. ; Mahoney, Michael J. The observed spectral energy distributions of HK Tau, and R Y Tau exhibit shallow (but significant) dips at mid-infrared wavelengths. This behavior can be explained by the existence discrete gaps in their circumstellar disks since, if temperature decreases monotonically...
We have developed a chemical ionization mass spectrometry technique for precise in situ measurements of hydrochloric acid (HCl) from high-altitude aircraft. In at subtropical latitudes, minimum HCl values found the upper troposphere (UT) were often near or below detection limit (0.005 parts per billion by volume), indicating that background are much lower than global mean estimate. However, significant abundances observed many UT air parcels, as result stratosphere-to-troposphere transport...
In July 2005, the National Aeronautics and Space Administration investigated tropical cyclogenesis, hurricane structure, intensity change in eastern North Pacific western Atlantic using its ER-2 high-altitude research aircraft. The campaign, called Tropical Cloud Systems Processes (TCSP) experiment, was conducted conjunction with Oceanic Atmospheric Administration/Hurricane Research Division's Intensity Forecasting Experiment. A number of situ remote sensor datasets were collected inside...
Aerosol particles from the upper troposphere (UT) and lower stratosphere (LS) were collected during Cirrus Regional Study of Tropical Anvils Layers‐Florida Area Experiment (CRYSTAL‐FACE) studied by transmission electron microscopy (TEM). Samples classified into three categories: (1) UT in‐cloud, (2) out‐of‐cloud, (3) LS. Sulfate particles, including former H 2 SO 4 droplets, are dominant in samples all categories. The morphology droplets indicates that they had been ammoniated to some extent...
Large (>2 μm diameter) HNO 3 ‐containing polar stratospheric cloud (PSC) particles were measured in situ by the NOAA NO y instrument on board NASA ER‐2 aircraft during seven flights 1999/2000 Arctic winter vortex. Here we discuss detection of these large PSC particles, their spatial distribution, ambient conditions under which they detected, and our methods for interpreting time series with respect to particle sizes number concentrations. The observed through use two inlets a separator...