ASDC | TRACE-P_TraceGas_AircraftInSitu_DC8_Data

TRACE-P Level 2

Entry Title: TRACE-P DC-8 In-Situ Trace Gas Data

Entry ID: TRACE-P_TraceGas_AircraftInSitu_DC8_Data_1

Aerosols

Description

TRACE-P_TraceGas_AircraftInSitu_DC8_Data is the in-situ trace gas data collected onboard the DC-8 aircraft during the Transport and Chemical Evolution over the Pacific (TRACE-P) 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 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

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DATA CITATION POLICY

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GENERAL DOCUMENTATION

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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:

NITRATE PARTICLES
HCFC-22 > HYDROCHLOROFLUOROCARBONS > HALOCARBONS AND HALOGENS
ATMOSPHERIC CARBON DIOXIDE > CARBON AND HYDROCARBON COMPOUNDS
CHLOROFLUOROCARBONS > HALOCARBONS AND HALOGENS
ATMOSPHERIC OZONE > OXYGEN COMPOUNDS
FORMALDEHYDE > CARBON AND HYDROCARBON COMPOUNDS
HYDROGEN PEROXIDE > OXYGEN COMPOUNDS
HALONS > HALOCARBONS AND HALOGENS
HYDROFLUOROCARBONS > HALOCARBONS AND HALOGENS
CFC-11 > CHLOROFLUOROCARBONS > HALOCARBONS AND HALOGENS
HYDROPEROXY > HYDROGEN COMPOUNDS
NITROUS OXIDE > NITROGEN COMPOUNDS
SULFUR DIOXIDE > SULFUR COMPOUNDS
SULFUR DIOXIDE PROFILES > SULFUR DIOXIDE > SULFUR COMPOUNDS
CARBONYL SULFIDE > SULFUR COMPOUNDS
SULFATE PARTICLES
CFC-12 > CHLOROFLUOROCARBONS > HALOCARBONS AND HALOGENS
SULFATE > SULFUR COMPOUNDS
ATMOSPHERIC NITRIC ACID > NITROGEN COMPOUNDS
CARBON DIOXIDE PROFILES > ATMOSPHERIC CARBON DIOXIDE > CARBON AND HYDROCARBON COMPOUNDS
ETHANE > CARBON AND HYDROCARBON COMPOUNDS
METHANOL > HALOCARBONS AND HALOGENS
AMMONIUM AEROSOLS
NITROGEN DIOXIDE > NITROGEN COMPOUNDS
ATMOSPHERIC CARBON MONOXIDE > CARBON AND HYDROCARBON COMPOUNDS
OZONE PROFILES > ATMOSPHERIC OZONE > OXYGEN COMPOUNDS
NITROGEN OXIDES > NITROGEN COMPOUNDS

Data Distribution

Spatial Information

Spatial Coverage: (S: 6.89, N: 45.7), (W: -180, E: 180)
Spatial Coverage Type: Horizontal Vertical
Coordinate System: Cartesian
Granule Spatial Representation: Cartesian

Locations

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

Temporal Information

Temporal Coverage: 1999-01-07 - 2002-03-01

Platforms

Jet

NASA DC-8

NASA Douglas DC-8

DACOM

Differential Absorption CO, CH4, N2O Measurements

GAS CHROMATOGRAPHS

ION CHROMATOGRAPHS

CHEMILUMINESCENCE

FLUORESCENCE SPECTROSCOPY

Metadata Dates

Created on 2023-12-06

Last updated on 2023-12-07