ASDC | STRAT_jValue_AircraftInSitu_ER2_Data

STRAT Level 2

Entry Title: STRAT Photolysis Frequencies (J-Values)

Entry ID: STRAT_jValue_AircraftInSitu_ER2_Data_1

Field Campaigns

Description

STRAT_jValue_AircraftInSitu_ER2_Data is the photolysis frequencies (j-values) collected during the Stratospheric Tracers of Atmospheric Transport (STRAT) campaign. Data from the Composition and Photo-Dissociative Flux Measurement (CPFM) is featured in this collection. Data collection for this product is complete.

The STRAT campaign was a field campaign conducted by NASA from May 1995 to February 1996. The primary goal of STRAT was to collect measurements of the change of long-lived tracers and functions of altitude, latitude, and season. These measurements were taken to aid with determining rates for global-scale transport and future distributions of high-speed civil transport (HSCT) exhaust that was emitted into the lower atmosphere. STRAT had four main objectives: defining the rate of transport of trace gases from the stratosphere and troposphere (i.e., HSCT exhaust emissions), improving the understanding of dynamical coupling rates for transport of trace gases between tropical regions and higher latitudes and lower altitudes (between tropical regions, higher latitudes, and lower altitudes are where most ozone resides), improving understanding of chemistry in the upper troposphere and lower stratosphere, and finally, providing data sets for testing two-dimensional and three-dimensional models used in assessments of impacts from stratospheric aviation.

To accomplish these objectives, the STRAT Science Team conducted various surface-based remote sensing and in-situ measurements. NASA flew the ER-2 aircraft along with balloons such as ozonesondes and radiosondes just below the tropopause in the Northern Hemisphere to collect data. Along with the ER-2 and balloons, NASA also utilized satellite imagery, theoretical models, and ground sites. The ER-2 collected data on HOx, NOy, CO2, ozone, water vapor, and temperature. The ER-2 also collected in-situ stratospheric measurements of N2O, CH4, CO, HCL, and NO using the Aircraft Laser Infrared Absorption Spectrometer (ALIAS). Ozonesondes and radiosondes were also deployed to collect data on CO2, NO/NOy, air temperature, pressure, and 3D wind. These balloons also took in-situ measurements of N2O, CFC-11, CH4, CO, HCL, and NO2 using the ALIAS. Ground stations were responsible for taking measurements of O3, ozone mixing ratio, pressure, and temperature. Satellites took infrared images of the atmosphere with the goal of aiding in completing STRAT objectives. Pressure and temperature models were created to help plan the mission.

DOI

10.5067/ASDC/SUBORBITAL/STRAT_jValue_AircraftInSitu_ER2_Data_1

Citation Styles for this Dataset

Resources and Documentation

Earthdata Forum

PROJECT HOME PAGE

ESPO Home Page for STRAT

VIEW RELATED INFORMATION

GENERAL DOCUMENTATION

STRAT Science Overview

From GCMD Science Keywords:

NITROGEN DIOXIDE > NITROGEN COMPOUNDS
NITROGEN OXIDES
ATMOSPHERIC NITRIC ACID > NITROGEN COMPOUNDS
CFC-12 > CHLOROFLUOROCARBONS > HALOCARBONS AND HALOGENS
CHLOROFLUOROCARBONS > HALOCARBONS AND HALOGENS
ATMOSPHERIC CARBON DIOXIDE > CARBON AND HYDROCARBON COMPOUNDS
STATIC PRESSURE
HYPOCHLOROUS MONOXIDE > CARBON AND HYDROCARBON COMPOUNDS
ATMOSPHERIC OZONE > OXYGEN COMPOUNDS
CHLORINE DIOXIDE > HALOCARBONS AND HALOGENS
PHOTOLYSIS RATES > PHOTOCHEMISTRY
DINITROGEN PENTOXIDE > NITROGEN COMPOUNDS
BROMINE MONOXIDE > HALOCARBONS AND HALOGENS
FORMALDEHYDE > CARBON AND HYDROCARBON COMPOUNDS
CHLORINE NITRATE > HALOCARBONS AND HALOGENS
CFC-11 > CHLOROFLUOROCARBONS > HALOCARBONS AND HALOGENS
ATMOSPHERIC WATER VAPOR
HYDROGEN CHLORIDE > HALOCARBONS AND HALOGENS
PEROXYNITRIC ACID > NITROGEN COMPOUNDS
MOLECULAR OXYGEN > OXYGEN COMPOUNDS
NITROUS OXIDE > NITROGEN COMPOUNDS
CARBON TETRACHLORIDE > HALOCARBONS AND HALOGENS
TOTAL OZONE > ATMOSPHERIC OZONE > OXYGEN COMPOUNDS

Data Distribution

File Format(s):

.er2

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Spatial Information

Spatial Coverage: (S: -2.14, N: 68.23), (W: -180, E: 180)
Spatial Coverage Type: Horizontal Vertical
Coordinate System: Cartesian
Granule Spatial Representation: Cartesian

Locations

NORTH AMERICA UNITED STATES OF AMERICA CALIFORNIA NORTHERN HEMISPHERE WESTERN HEMISPHERE

Temporal Information

Temporal Coverage: 1995-03-24 - 1996-12-21

Platforms

Jet

NASA ER-2

NASA Earth Resources-2

CPFM

Composition and Photodissociative Flux Measurement

Models

Data Analysis

Metadata Dates

Created on 2023-09-19

Last updated on 2023-11-30