ASDC | TRACE-P_Merge_Data

TRACE-P Level 3

Entry Title: TRACE-P Merge Data

Entry ID: TRACE-P_Merge_Data_1

Aerosols Tropospheric Composition

Description

TRACE-P_Merge_Data is the merge data files created from data collected during during the Transport and Chemical Evolution over the Pacific (TRACE-P) suborbital campaign. Data collection for this product is complete.

The NASA TRACE-P 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-P was a multi-organizational campaign with NASA, the National Center for Atmospheric Research (NCAR), and several US universities. TRACE-P deployed its payloads in the Pacific between the months of March and April 2001 with the goal of studying the air chemistry emerging from Asia to the western Pacific. Along with this, TRACE-P had the objective studying the chemical evolution of the air as it moved away from Asia.

In order to accomplish its goals, the NASA DC-8 aircraft and NASA P-3B aircraft were deployed, each equipped with various instrumentation. TRACE-P also relied on ground sites, and satellites to collect data. The DC-8 aircraft was equipped with 19 instruments in total while the P-3B boasted 21 total instruments. Some instruments on the DC-8 include the Nephelometer, the GCMS, the Nitric Oxide Chemiluminescence, the Differential Absorption Lidar (DIAL), and the Dual Channel Collectors and Fluorometers, HPLC. The Nephelometer was utilized to gather data on various wavelengths including aerosol scattering (450, 550, 700nm), aerosol absorption (565nm), equivalent BC mass, and air density ratio. The GCMS was responsible for capturing a multitude of compounds in the atmosphere, some of which include CH4, CH3CHO, CH3Br, CH3Cl, CHBr3, and C2H6O. DIAL was used for a variety of measurements, some of which include aerosol wavelength dependence (1064/587nm), IR aerosol scattering ratio (1064nm), tropopause heights and ozone columns, visible aerosol scattering ratio, composite tropospheric ozone cross-sections, and visible aerosol depolarization. Finally, the Dual Channel Collectors and Fluorometers, HPLC collected data on H2O2, CH3OOH, and CH2O in the atmosphere. The P-3B aircraft was equipped with various instruments for TRACE-P, some of which include the MSA/CIMS, the Non-dispersive IR Spectrometer, the PILS-Ion Chromatograph, and the Condensation particle counter and Pulse Height Analysis (PHA). The MSA/CIMS measured OH, H2SO4, MSA, and HNO3. The Non-dispersive IR Spectrometer took measurements on CO2 in the atmosphere. The PILS-Ion Chromatograph recorded measurements of compounds and elements in the atmosphere, including sodium, calcium, potassium, magnesium, chloride, NH4, NO3, and SO4. Finally, the Condensation particle counter and PHA was used to gather data on total UCN, UCN 3-8nm, and UCN 3-4nm. Along with the aircrafts, ground stations measured air quality from China along with C2H2, C2H6, CO, and HCN. Finally, satellites imagery was used to collect a multitude of data, some of the uses were to observe the history of lightning flashes, SeaWiFS cloud imagery, 8-day exposure to TOMS aerosols, and SeaWiFS aerosol optical thickness. The imagery was used to best aid in planning for the aircraft deployment.

Resources and Documentation

Earthdata Forum

PROJECT HOME PAGE

GTE Home Page

TRACE-P Home Page

VIEW RELATED INFORMATION

DATA CITATION POLICY

How to Cite ASDC Data

GENERAL DOCUMENTATION

GTE Data Format

PUBLICATIONS

TRACE-P White Paper

Transport and Chemical Evolution over the Pacific (TRACE-P) aircraft mission: Design, execution, and first results

From GCMD Science Keywords:

METHANE > CARBON AND HYDROCARBON COMPOUNDS
ATMOSPHERIC OZONE > OXYGEN COMPOUNDS
ATMOSPHERIC NITRIC ACID > NITROGEN COMPOUNDS
AEROSOL PARTICLE PROPERTIES
HYDROFLUOROCARBONS > HALOCARBONS AND HALOGENS
STATIC PRESSURE
NITROGEN OXIDES > NITROGEN COMPOUNDS
STATIC TEMPERATURE > SURFACE TEMPERATURE
CARBONYL SULFIDE > SULFUR COMPOUNDS
HALONS > HALOCARBONS AND HALOGENS
WATER VAPOR MIXING RATIO PROFILES > WATER VAPOR PROFILES
CHLOROFLUOROCARBONS > HALOCARBONS AND HALOGENS
ATMOSPHERIC CARBON MONOXIDE > CARBON AND HYDROCARBON COMPOUNDS
FORMALDEHYDE > CARBON AND HYDROCARBON COMPOUNDS
HYDROXYL > HYDROGEN COMPOUNDS
ATMOSPHERIC WATER VAPOR
NITRATE PARTICLES
CARBON TETRACHLORIDE > HALOCARBONS AND HALOGENS
CARBON MONOXIDE PROFILES > ATMOSPHERIC CARBON MONOXIDE > CARBON AND HYDROCARBON COMPOUNDS
TROPOSPHERIC OZONE
PHOTOLYSIS RATES > PHOTOCHEMISTRY
NITROUS OXIDE > NITROGEN COMPOUNDS
HYDROGEN PEROXIDE > OXYGEN COMPOUNDS

Data Distribution

Spatial Information

Spatial Coverage: (S: 6.9, N: 45.331), (W: -180, E: 180)
Spatial Coverage Type: Horizontal Vertical
Coordinate System: Cartesian
Granule Spatial Representation: Cartesian

Locations

WESTERN HEMISPHERE NORTHERN HEMISPHERE TROPOSPHERE HONG KONG JAPAN PACIFIC OCEAN WESTERN PACIFIC OCEAN

Temporal Information

Temporal Coverage: 2001-02-24 - 2001-04-11

Platforms

Jet

NASA DC-8

NASA Douglas DC-8

Propeller

P-3B

Lockheed P-3B Orion

Metadata Dates

Created on 2023-12-06

Last updated on 2023-12-12