|
|
 |
|
 |
|
Earth Science: Atmospheric Trace-Gas Measurements
| |
|
RO#
17507 |
|
|
Location
Ames Research Center
Moffett Field, CA 94035-1000 |
|
|
Advisor Information
| Name | Phone | Email |
|
Singh, Hanwant B.
|
(650)604-6769
|
hsingh@mail.arc.nasa.gov
|
|
|
|
Research Area
|
Earth and Atmospheric Sciences
|
|
|
|
|
Keywords
Atmospheric trace constituents; Stratosphere; Troposphere; Atmospheric coupling; Gas chromatography; Tropopause; |
|
|
Description
Trace-gas measurements are a continuing effort in the Ames
Atmospheric Research Program. Minor constituents of interest are
halocarbons, hydrocarbons, sulfur gases, N2O, CO, and
others. Concentrations of minor constituents have been measured as a
function of altitude and latitude in the lower stratosphere in
various locations in the northern hemisphere.
Part of the current research program investigates transport and
troposphere-stratosphere exchange processes. The experimental effort
involves trace-gas measurements in the lower stratosphere (e.g.,
chlorofluorocarbons, N2O, CO, and CH4).
Recently, an automated whole-air sampler was developed for the
multi-instrumented ER-2 aircraft for a study of the region of
depleted ozone in the Antarctic.
Measurements of tropospheric trace gases play a large role in
this program. Information on the behavior and variability of
trace-gas species in the atmosphere aids in understanding the
natural atmospheric chemical processes. Currently, light
hydrocarbons, PAN, and CO are determined by gas chromatography.
Efforts are under way to develop techniques for the measurement of
carbonyl compounds.
|
|
 |
|
 |
|