ASDC | TRACE-A_Trajectory_Data

TRACE-A Level 2

Entry Title: TRACE-A Kinematic Trajectory Data

Entry ID: TRACE-A_Trajectory_Data_1

Field Campaigns

Description

TRACE-A_Trajectory_Data is the kinematic trajectory data collected during the Transport and Atmospheric Chemistry near the Equator - Atlantic (TRACE-A) suborbital campaign. Data from the Two Photon - Laser Induced Fluorescence (TP-LIF) and Differential Absorption of CO, CH4, N2O Measurements (DACOM) instruments are featured in this collection. Data collection for this product is complete.

The TRACE-A mission was a part of NASA’s Global Tropospheric Experiment (GTE) – an assemblage of missions conducted from 1983-2001 with various research goals and objectives. TRACE-A was conducted in the Atlantic from September 21 to October 24, 1992. TRACE-A had the objective of determining the cause and source of the high concentrations of ozone that accumulated over the Atlantic Ocean between southern Africa and South America from August to October. NASA partnered with the Brazilian Space Agency (INPE) to accomplish this goal.

The NASA DC-8 aircraft and ozonesondes were utilized during TRACE-A to collect the necessary data. The DC-8 was equipped with 19 instruments. A few instruments on the DC-8 include the Differential Absorption Lidar (DIAL), the Laser-Induced Fluorescence, the O3-NO Ethylene/Forward Scattering Spectrometer, the Modified Licor, and the DACOM IR Laser Spectrometer. The DIAL was responsible for a variety of measurements, which include Nadir IR aerosols, Nadir UV aerosols, Zenith IR aerosols, Zenith VS aerosols, ozone, and ozone column. The Laser-Induced Fluorescence instrument collected measurements on NxOy in the atmosphere. Measurements of ozone were recorded by the O3-NO Ethylene/Forward Scattering Spectrometer while the Modified Licor recorded CO2. Finally, the DACOM IR Laser Spectrometer gathered an assortment of data points, including CO, O3, N2O, CH4, and CO2. Ozonesondes played a role in data collection for TRACE-A along with the DC-8 aircraft. The sondes were dropped from the DC-8 aircraft in order to gather data on ozone, temperature, and atmospheric pressure.

DOI

10.5067/ASDC/SUBORBITAL/TRACE-A/Trajectory_Data_1

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Resources and Documentation

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TRACE-A Summary

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GENERAL DOCUMENTATION

GTE Data Format

PUBLICATIONS

NASA GTE TRACE A Experiment (September-October 1992): Overview

From GCMD Science Keywords:

WIND SPEED > SURFACE WINDS
WIND DIRECTION > SURFACE WINDS
STATIC PRESSURE
POTENTIAL VORTICITY > VORTICITY > WIND DYNAMICS

Data Distribution

File Format(s):

.tra

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Spatial Information

Spatial Coverage: (S: -60, N: 19.95), (W: -180, E: 58.69)
Spatial Coverage Type: Horizontal Vertical
Coordinate System: Cartesian
Granule Spatial Representation: Cartesian

Locations

SOUTHERN HEMISPHERE WESTERN HEMISPHERE SOUTH ATLANTIC OCEAN TROPOSPHERE BRAZIL

Temporal Information

Temporal Coverage: 1990-03-13 - 1992-11-02

Platforms

Models

Data Analysis

Metadata Dates

Created on 2023-12-07

Last updated on 2024-04-18