Global Tropospheric Experiment Transport and Chemical Evolution over the Pacific (TRACE-P) Langley ASDC Data Set Document
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Global Tropospheric Experiment Transport and Chemical Evolution over the Pacific (TRACE-P) Langley ASDC Data Set Document |
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This document provides information on data products obtained during the GTE TRACE-P atmospheric science expedition conducted over the western Pacific during February, March and April, 2001. The objective of the mission was to determine the chemical composition of the Asian outflow and evolution over the western Pacific. Measurements were made primarily by investigators' instruments located on the NASA DFRC DC-8 and WFF P-3B airplanes. Also provided are a list of principal investigators and references for measurement techniques and publications.
This document provides information for the following data sets:
Where XX indicates the flight number.
| gte_tracep_dc8flight_insitu_XX.zip: | Chemical & Aerosol In Situ Measurements |
| gte_tracep_dc8flight_project_XX.zip: | Aircraft Ephemeras & Meteorological Data |
| gte_tracep_merged_dc8_fltXX.zip: | Merged Chemical, Aerosol & Ephemeras Data Files |
| gte_tracep_beoz1dXX.zip: | DIAL Ozone Profiles |
| gte_tracep_bevs1dXX.zip: | DIAL Visible Aerosol Scattering |
| gte_tracep_betc1dXX.zip: | DIAL Tropopause Height and Ozone Column |
| gte_tracep_bewd1dXX.zip: | DIAL Depolarization Aerosol Scattering |
| gte_tracep_bedp1dXX.zip: | DIAL Visible Aerosol Depolarization |
| gte_tracep_beir1dXX.zip: | DIAL Aerosol Scattering 1064nm |
| gte_tracepdc8_cld_index.zip: | Cloud Index |
| gte_tracep_dc8_sat_images_trkmXX.zip: | IR, Visible, and Water Vapor Satellite Images |
| gte_tracep_dc8_traj_images_fltXX.zip: | Plot of Backward Air mass Trajectories |
| gte_tracep_dc8_traj_tab_fltXX.zip: | Tabulated Data of Backward Air mass Trajectories |
Where XX indicates the flight number.
| gte_tracep_p3bflight_insitu_fltXX.zip: | P3-B Chemical & Aerosol In Situ Measurements |
| gte_tracep_p3bflight_project_fltXX.zip: | P3-B Aircraft Ephemeras & Meteorological Data |
| gte_tracep_merged_p3b_fltXX.zip: | P3-B Merged Chemical, aerosol & Ephemeras Data Files |
| gte_tracep_tams1pXX.zip: | P3-B 10hz Turbulent air motion measurements |
| gte_tracep_p3b_sat_images_trkmXX.zip: | IR, Visible, and Water Vapor Satellite Images |
| gte_tracep_p3b_traj_images_fltXX.zip: | Plot of Backward Air mass Trajectories |
| gte_tracep_p3b_traj_tab_fltXX.zip: | Tabulated Data of Backward Air mass Trajectories |
| gte_tracep_ftir_ground.zip: | Ground Based FTIR Measurements of C2H2, C2H6, CO, and HCN |
| gte_tracep_prc_plots_2001mmdd-2001mmdd.zip: | Ground Based Observations in PRC |
| gte_tracep_2001mmdd.zip: | Satellite Data Products During TRACE-P Mission Period |
| gte_tracep_ozonesondes_Kagoshima.zip: | Data from Ozone Sonde Launches at Kagoshima, Japan (other files for launches at Naha, Sapporo, and Tateno, Japan; Cheju, Korea; Hilo, Hawaii, USA; Hong Kong, PRC; Taipei, Taiwan; Trinidad Head, CA, USA) |
NASA funded the investigators involved in the TRACE-P mission. The funded investigators, their organization, and their grant, agreement or contract number was:
| Area | Investigator | Organization | Number |
|---|---|---|---|
| Aircraft | B. Anderson | NASA Langley | N/A |
| E. Apel | NCAR | NCC-1-420 | |
| E. Atlas | NCAR | NCC-1-418 | |
| M. Avery | NASA Langley | N/A | |
| A. Bandy | Drexel U | NCC-1-409 | |
| D. Blake | U of California Irvine | NCC-1-413 | |
| E. Browell | NASA Langley | N/A | |
| B. Brune | Pennsylvania State U | NCC-1-414 | |
| C. Cantrell | NCAR | NCC-1-424 | |
| A. Clarke | U of Hawaii | NCC-1-416 | |
| F. Eisele | Georgia Tech | NCC-1-421 | |
| F. Flocke | NCAR | NCC-1-423 | |
| A. Fried | NCAR | NCC-1-419 | |
| B. Heikes | U of Rhode Island | NCC-1-408 | |
| G. Sachse | NASA Langley | N/A | |
| S. Sandholm | Georgia Tech | NCC-1-417 | |
| R. Shetter | NCAR | L-14366 | |
| H. Singh | NASA Ames | N/A | |
| R. Talbot | U of New Hampshire | NCC-1-410 | |
| R. Weber | GA Tech | NCC-1-411 | |
| Surface Measurements | S. Oltmans | NOAA CMDL | L-12923 |
| Modeling | G. Carmichael | U of Iowa | NCC-1-422 |
| J. Crawford | NASA Langley | N/A | |
| D. Davis | Georgia Tech | NCC-1-01024 | |
| H. Fuelberg | Florida State U | NCC-1-412 | |
| D. Jacob | Harvard | NAG-1-2328 | |
| R. Newell | Mass. Inst. Of Tech. | NCC-1-415 | |
| M. Prather | U of California-Irvine | NAG-1-01001 | |
| A. Thompson | NASA Goddard | N/A |
Aircraft data sets are available for each investigation for each flight. Ground-based data are usually available on a daily basis. Airborne measurements were typically obtained at constant altitude over the Pacific Ocean during the transit flights (i.e. "survey" flights), and over multi-altitudes closer to Asia during flight from the intensive sites. Flight missions were conducted during TRACE-P from February 24, through April 10, 2001. Flight dates, takeoff and landing times and sites, and flight tracks and profiles are shown in Jacob et al., [2003]. The duration, altitude range, ascent and descent rate, and flight path for each mission varied depending on mission objectives and environmental conditions. Ground-based measurements were made at sites also shown in Jacob et al., [2003]. The automated ground sites provided daily measurements during the time frame when airborne measurements were being made and weekly averaged samples before and after. Further information about the measurement region and time frame may be found in the Journal of Geophysical Research, Vol. 108, No. 20, October 27, 2003.
This data collection contains 12 separate data sets. These include the atmospheric chemistry, meteorological and navigational data recorded aboard the NASA DFRC DC-8 and WFF P-3B airborne laboratories and data obtained from surface level sites.
Where XX indicates the flight number.
gte_tracep_dc8flight_insitu_XX.zip - Chemical & Aerosol In Situ MeasurementsWhere XX indicates the flight number.
gte_tracep_p3bflight_insitu_fltXX.zip - P3-B Chemical & Aerosol In Situ MeasurementsThe preceding data sets are available from the ASDC GTE Data and Information page. See the GTE home page for additional description of the TRACE-P field mission.
TRACE-P investigators have individually reported the results of their investigations in the Journal of Geophysical Research, Vol. 108, No. 20 and 21, October 27 and November 16, 2003.
There are data sets available from the Langley ASDC and from the GTE Home Page for 13 other GTE missions conducted from 1983 to 2001. See the GTE home page and the ASDC GTE Data and Information page for a description of the available data.
Global Tropospheric Experiment Transport and Chemical Evolution over the Pacific (TRACE-P)
If the person is known to be retired, deceased or no longer at the organization originally responsible for the investigation, it is noted and the contact information may be omitted. The contact information provided was current during the mission, but may no longer be current.
| Investigator Area | Investigator Information |
|---|---|
| Aerosols and Condensation Nuclei | Bruce E. Anderson NASA Langley Research Center Mail Stop 483 Hampton VA 23681 Telephone: 757-864-5850 E-mail: bruce.e.anderson@nasa.gov |
| Alcohols and Aldehydes | Eric C. Apel NCAR-ACD 1850 Table Mesa Drive Boulder CO 80305 Telephone: 303-497-1452 E-mail: apel@acd.ucar.edu |
| C1-C4 Alkyl Nitrates and Selected Hydrocarbons | Elliot Atlas NCAR Atmospheric Chemistry Division P. O. Box 3000 1850 Table Mesa Drive Boulder CO 80307 Telephone: 303-497-1425 E-mail: atlas@acd.ucar.edu |
| In-situ Ozone | Melody Avery MS 401B NASA Langley Research Center Hampton VA 23681-2199 Telephone: 757-864-5522 E-mail: melody.a.avery@nasa.gov |
| Carbon Dioxide | Stephanie Vay MS 483 NASA Langley Research Center Hampton VA 23681-2199 Telephone: 757-864-1574 E-mail: stephanie.a.vay@nasa.gov |
| Airborne Meteorological/Position Data | John D. Barrick MS 483 NASA Langley Research Center Hampton VA 23681-0001 Telephone: 757-864-5831 E-mail: john.d.barrick@nasa.gov |
| Speciated Non Methane Hydrocarbons (C2-C10),
CH4, Halocarbons including Methyl Halides, C1-C4 Alkyl Nitrates, and DMS |
Don Blake University of California-Irvine Department of Chemistry Irvine, CA 92717 Telephone: 949-824-4195 E-mail: drblake@uci.edu |
| Aerosol and Ozone Profiles | Edward V. Browell Mail Stop 401A NASA Langley Research Center Hampton VA 23681-0001 Telephone: 757-864-1273 E-mail: edward.v.browell@nasa.gov |
| OH and HO2 | Bill Brune Penn State University Dept. of Meteorology 503 Walker Building University Park PA 16802-5013 Telephone: 814-865-3286 E-mail: brune@essc.psu.edu |
| Formaldehyde | Alan Fried NCAR-ACD P O Box 3000 Boulder CO 80305 Telephone: 303-497-1475 E-mail: fried@acd.ucar.edu |
| H2O2, CH3OOH and CH2O | Brian G. Heikes University of Rhode Island Graduate School of Oceanography South Ferry Road Narragansett, RI 02882-1197 Telephone: 401-874-6810/6683 E-mail: bheikes@gso.uri.edu |
| Carbon Monoxide, Methane, Nitrous Oxide, Water Vapor | Glen W. Sachse MS 472 NASA Langley Research Center Hampton VA 23681-0001 Telephone: 757-864-1566 E-mail: glen.w.sachse@nasa.gov |
| Nitric Oxide, Nitrogen Dioxide | Scott Sandholm Georgia Institute of Technology Earth and Atmospheric Sciences Baker Building, Room 107 923 Dalney Street Atlanta GA 30332-0340 Telephone: 404-894-3895/3824 E-mail: ss27@prism.gatech.edu |
| Photolysis Rate Coefficients and Total Solar Actinic Flux as a Function of Wavelength | Richard Shetter NCAR Atmospheric Chemistry Division 1850 Table Mesa Drive Boulder CO 80303 Telephone: 303-497-1420 E-mail: shetter@ncar.ucar.edu |
| PAN, Acetone, Alcohols, Organic Nitrates | Hanwant Singh NASA Ames Research Center Singh Group Mail Stop 245-5 Moffett Field, CA 94035 Telephone: 415-604-6769 E-mail: hanwant.b.singh@nasa.gov |
| Aerosol soluble ions and radionuclides; Nitric Acid and SO2 | Robert W. Talbot University of New Hampshire Institute of Earth, Oceans, Space Morse Hall Complex Systems Research Center Durham NH 03820 Telephone: 603-862-1546 E-mail: rwt@christa.unh.edu |
| Investigator Area | Investigator Information |
|---|---|
| C1-C4 Alkyl Nitrates and Selected Hydrocarbons | Elliot Atlas (See prior listing under DC-8 investigators) |
| In-situ Ozone | Melody Avery (See prior listing under DC-8 investigators) |
| Carbon Dioxide | Stephanie Vay (See prior listing under DC-8 investigators) |
| SO2 | Alan R. Bandy Drexel University Department of Chemistry 32nd and Chestnut Street Philadelphia PA 19104 Telephone: 215-895-2640 E-mail: bandyar@drexel.edu |
| Airborne Meteorological/Position Data | John D. Barrick MS 483 NASA Langley Research Center Hampton VA 23681-0001 Telephone: 757-864-5831 E-mail: john.d.barrick@nasa.gov |
| Speciated Non Methane Hydrocarbons (C2-C10),
CH4, Halocarbons including Methyl Halides, C1-C4 Alkyl Nitrates, and DMS |
Don Blake (See prior listing under DC-8 investigators) |
| HO2,RO2 | Christopher A. Cantrell NCAR-ACD 1850 Table Mesa Drive Boulder CO 80305 Telephone: 303-497-1479 E-mail: cantrell@ucar.edu |
| Aerosol size/number distribution, black carbon, in-situ aerosol light scattering coefficient, and condensation nuclei |
Antony Clarke University of Hawaii Dept. of Oceanography 1000 Pope Road Honolulu HI 96822 Telephone: 808-956-6215 E-mail: tclarke@soest.hawaii.edu |
| OH, H2SO4, MSA, HNO3 | Fred Eisele Georgia Institute of Technology 1850 Table Mesa Drive Boulder Co 80303 Telephone: 303-497-1483 E-mail: fred.eisele@eas.gatech.edu |
| PAN, PPN, PiBN, MPAN | Frank Flocke NCAR-ACD 1850 Table Mesa Drive Boulder CO 80305 Telephone: 303-487-1457 E-mail: ffl@acd.ucar.edu |
| NO, NO2 | Yutaka Kondo University of Tokyo Research Center for Advanced Science and Technology 4-6-1 Komaba Meguro-KU Tokyo 153-8904 Japan Telephone: 81-3-5452-5145 E-mail: kondo@atmos.rcast.u-tokyo.ac.jp |
| Carbon Monoxide, Methane | Glen W. Sachse (See prior listing under DC-8 investigators) |
| Photolysis Rate Coefficients and Total Solar Actinic Flux as a Function of Wavelength | Richard Shetter (See prior listing under DC-8 investigators) |
| Turbulent Air Motion Measurements | Lee Thornhill NASA Langley Research Center Mail Stop 483 NASA Langley Research Center Hampton, VA 23681 Telephone: 757-864-5169 e-mail: kenneth.l.thornhill@nasa.gov |
| Ultra-fine aerosols and Aerosol Composition | Rodney J. Weber GA Tech Earth and Atmospheric Sciences Department 221 Bobby Dodd Way Atlanta GA 30332-0340 Telephone: 404-894-1750 E-mail: rweber@eas.gatech.edu |
| Investigator Area | Investigator Information |
|---|---|
| Column content of CO, C2H6, and HCN | Makoto Koike University of Tokyo Department of Earth and Planetary Sciences Graduate School of Science 7-3-1 Hongo, bunkyo-Ku Tokyo 113-0033 Japan Telephone: 81-3-5841-4595 E-mail: koike@eps.s.u-tokyo.ac.jp |
| Ozonesondes | Samuel J. Oltmans NOAA Climate Monitoring and Diagnostics Lab 325 Broadway Boulder CO 80303 Telephone: 303-497-6676 E-mail: samuel.j.oltmans@noaa.gov |
| Mission | Investigator Information |
|---|---|
| ACE Asia | Barry Huebert Department of Oceanography School of Ocean and Earth Science and Technology University of Hawaii-Manoa 1000 Pope Road Honolulu, HI 96822 Telephone: 808-956-6896 E-mail: huebert@hokulea.soest.hawaii.edu |
| Bible Phase C | Toshihiro Ogawa Director, Earth Observation Research Center NASDA 1-9-9, Roppongi, Minato-Ku Tokyo, 106-0032 Japan Telephone: 81-3-3224-7080 |
| MOPITT | John Gille 3300 Mitchell Lane, Suite 275 University of Colorado/NCAR Boulder Co 80301 Telephone: 303-497-1402 E-mail: gille@ucar.edu |
| Aircraft and Ground Measurements | Daniel Jaffe University of Washington-Bothall 18115 Campus Way NE Bothell WA 98011-8246 Telephone: 425-352-5357 E-mail: djaffe@u.washington.edu |
| NAST/PROTEUS | William Smith (retired) NASA Langley Research Center Hampton VA 23681 |
| Toshifumi Fujimoto Ozone Layer Monitoring Office Japan Meteorological Agency 1-3-4, Ote-machi, Chiyoda-ku, Tokyo, 100-8122 Japan Telephone: 81-3-3287-3439 E-mail: fujimoto@met.kishou.go.jp |
Lo-Yin Chan Department of Civil and Structural Engineering Hong Kong Polytechnic University Hung Hom Kowloon Hong Kong Telephone: 852-2766-6071 E-mail: celychan@inet.polyu.edu.hk |
| Anne Thompson SHADOZ NASA GSFC Code 916 Building 33, Room E417 Greenbelt MD 20771 Telephone: 814-865-0479 E-mail: anne.m.thompson@nasa.gov |
H. K. Lam Director, Hong Kong Observatory 134A Nathan Road Kowloon, Hong Kong Telephone: 2926 8221 E-mail: mailbox@hko.gov.hk |
| Jen-Ping Chen Department of Atmospheric Sciences National Taiwan University No. 61, Ln. 144, Sec. 4, Keelung Road Taipei, Taiwan 106, R. O. C. Telephone: 886-2-23633317 E-mail: jpchen@as.ntu.edu.tw |
Jae Kim Department of Atmospheric Science Pusan National University Korea 609-735 |
| John Henessy Head, Meteorological Applications Section ECMWF Shinfield Park Reading, RG2 9AX, England Telephone: 44-118-949-9400 E-mail: j.hennessy@ecmwf.int |
Tao Wang Hong Kong Polytechnic University Department of Civil and Structural Engineering Hung Hom Kowloon Hong Kong Telephone: 852-2766-6059 E-mail: cetwang@polyu.edu.hk |
| Robert Atlas NASA GSFC Data Assimilation Office Code 910.3 Building 33 Greenbelt MD 20771 Telephone: 301-614-6140 E-mail: robert.m.atlas@nasa.gov |
Hsiu-Wu Chang Central Weather Bureau 64 Kung Yuan Road Taipei, Taiwan 100, R. O. C. Telephone: 886-2-23491026 E-mail: hsiuwu@cwb.gov.tw |
| Proposal Title | Principal Investigator |
|---|---|
| Regional Scale Forecasting and Experiment-Specific Emission Estimates of Gas and Aerosol Distributions in Support of the TRACE-P Experiment | Gregory R. Carmichael University of Iowa Chemical and Biochemical Engineering Chemistry Building Iowa City IA 52242 Telephone: 319-335-5191 E-mail: gregory-carmich@uiowa.edu |
| Tropospheric Modeling Studies of TRACE-P Field Data: Investigation of the HOx/NOx/O3 Photochemical System and Regional Assessment of Stratosphere-Troposphere Exchange | James Crawford NASA Langley Research Center Mail Stop 483 Hampton VA 23681 Telephone: 757-864-7231 E-mail: james.h.crawford@nasa.gov |
| Tropospheric Modeling Studies of TRACE-P Data: Investigation of the HOx/NOx/O3 Photochemical System and its Coupling to Sulfur/Aerosol Species | Douglas Davis Georgia Institute of Technology School of Earth and Atmospheric Sciences Room 108 221 Bobby Dodd Way Atlanta GA 30332-0340 Telephone: 404-894-9565 E-mail: dd16@prism.gatech.edu |
| Forecasting of Tracer Fields During TRACE-P with the Global Climate Model ECHAM | Johann Feichter Max Planck Institut Fuer Meteorologie Bundesstrasse 55, Room PE41 Hamburg 20146 Germany Telephone: 49-40-41173-317 E-mail: feichter@dkrz.de |
| Numerical Simulations and Diagnostic Studies Relating Meteorology to Atmospheric Chemistry During TRACE-P | Henry Fuelberg Florida State University Dept. of Meteorology Tallahassee FL 32306-4520 Telephone: 850-644-6466 E-mail: hfuelberg@fsu.edu |
| Analysis of Asian Outflow Over the Western Pacific Using Observations From TRACE-P | Daniel Jacob Harvard University Department of Engineering and Applied Sciences Pierce Hall, Room 109A 29 Oxford Street Cambridge MA 02138 Telephone: 617-495-1794 E-mail: djj@io.harvard.edu |
| Meteorological Analysis for TRACE-P | Reginald Newell (deceased) Massachusetts Institute of Technology Earth, Atmospheric and Planetary Sciences |
| Regional Chemistry from Global CTMs with EC-Modeled Met-fields for the TRACE-P Mission | Michael J. Prather University of California-Irvine Earth System Science Department Irvine CA 92697-3100 Telephone: 949-824-5838 E-mail: mprather@uci.edu |
| Tracer Transport during TRACE-P: Flight Planning and Interpretation with Satellite Maps, Ozone Profiles and Trajectory-based Analysis Tools | Anne Thompson NASA Goddard Space Flight Center Code 916 Bldg. 33, Room E417 Greenbelt MD 20771 Telephone: 301-286-2629 E-mail: anne.m.thompson@nasa.gov |
| SAGE II Aerosol and Ozone Measurements Support for the TRACE P Field Experiment | Charles R. Trepte NASA Langley Research Center Mail Stop 475 Hampton VA 23681 Telephone: 757-864-5836 E-mail: charles.r.trepte@nasa.gov |
The following persons have either more specialized knowledge about the data in the data sets or in their field or general knowledge about the mission, its execution and the data sets. Where a person is noted as being retired, the contact information given was current during the mission and the person may no longer be available through this location.
| Investigator or Knowledge Area | Investigator and Contact Information | |
|---|---|---|
| Measurements for DMS, SO2 on P-3B | Donald C. Thornton Drexel University Department of Chemistry 32nd and Chestnut Street Philadelphia PA 19104 |
|
| TRACE-P Mission Scientist and Deputy Mission Scientist | Daniel Jacob and James Crawford (see prior listings) | |
| TRACE -P Program Manager | Vickie S. Connors (no longer at NASA) NASA Langley Research Center |
|
| TRACE-P Project Manager | Richard J. Bendura (retired) NASA Langley Research Center |
|
| TRACE-P Mission Meteorologists | Reginald Newell (see prior listing under Modelers section) |
Henry Fuelberg (see prior listing under Modelers section) |
| DC-8 Aircraft Manager | Darrell Winfield (no longer at NASA) Walter Klein NASA Dryden Flight Research Center MS DAOF.S142 Edwards CA 93523-0273 Telephone: 661-816-9502 E-mail: walter.e.klein@nasa.gov |
Airborne Science Program Office MS D1623H Edwards, CA 93523-0273 Phone: (661) 276-7453 |
| P-3B Aircraft Manager | Richard Bradford (retired) | Wallops Flight Facility Aircraft Office NASA Wallops Flight Facility Wallops Island,VA 23337-5099 Telephone: 757-824-1529 |
| TRACE-P Logistics | Mike Cadena SAIC One Enterprise Parkway, Suite 300 Hampton VA 23666 Telephone: 757-827-4860 E-mail: michael.j.cadena@nasa.gov |
Erika Harper SAIC One Enterprise Parkway, Suite 300 Hampton VA 23666 |
| TRACE-P Experiment Integration | DC-8: James L. Raper, Sr. (retired) NASA Langley Research Center |
P-3B: John G. Wells (retired) NASA Langley Research Center |
| GTE/TRACE-P Webmaster | P. Kay Costulis MS 158 NASA Langley Research Center Hampton VA 23681-2199 Telephone: 757-864-1943 E-mail: p.k.costulis@nasa.gov |
|
Potential usage and applications of the described data sets can be seen in the articles that comprise the Journal of Geophysical Research TRACE-P Special Section (Vol.108, No. 20 and 21, October 27 and November 16, 2003) and the Fall 2002 AGU TRACE-P Special Session(s).
For convenience of the users, the calculated variables below are provided.
Mach Number, M: |
|
 |
M = Mach Number Ps = Static Pressure Qc = Differential Pressure |
Static Air Temperature, Ts: | |
 |
TS = Static Air Temperature (°K) TT = Total Air Temperature (°K) γ = 1.4, ratio of specific heat of air at constant pressure and volume |
True Air Speed, TAS: | |
 |
TAS = True Air Speed (knots) TS = Static Air Temperature (°K) M = Mach Number a = Speed of Sound |
Potential Temperature, θ: | |
 |
θ = Potential Temperature (°K) TS = Static Air Temperature (°K) Ps = Static Pressure (mb) |
Vapor Pressure, e :
ewater (mb) = [1.0007 + (3.46 * 10-6 * PS)] * 6.1121* EXP[17.502 * T/(240.97 + T)]
eice (mb) = [1.0003 + (4.18 * 10-6 * PS)] * 6.1115* EXP[22.452 * T/(272.55 + T)]
e = Partial Pressure of Water Vapor (mb)
PS = Static Pressure (mb)
T = Static Air Temperature (°C) for Saturation Vapor Pressure
or
T = Dew/Frost Point (°C) for Partial Pressure of Water Vapor
ProjDP of zero or greater should be used to derive the partial pressure of water vapor w.r.t water (ewater ) and the ProjDP less than zero should be used to derive the partial pressure of water vapor w.r.t ice (eice).
StatTempDegC and ProjDP parameters recorded in the P-3B data set are substituted to calculate saturation vapor pressure and partial pressure of water vapor, respectively.
TSDEGC and ProjDP parameters recorded in the DC-8 data set are substituted to calculate saturation vapor pressure and partial pressure of water vapor, respectively. Also notice in the DC-8 data set there is a redundant static air temperature measurement, TSCALC, which is calculated by DADS. Although TSDEGC and TSCALC track closely they can diverge by ≈ 1° at the low and high ends of the measurement range.
Specific Humidity, q: | |
 |
 |
Mixing Ratio, r: | |
 |
 |
| Note: ppmv = 1.608 * ppmw ppmw = 0.622 * ppmv | |
Relative Humidity, %: | |
w.r.t. water, |
w.r.t. ice, |
Interested readers should see the Journal of Geophysical Research, Vol. 108, No. 20 and 21, October 27 and November 16, 1003, and documents referenced therein, for plots and the results of analysis of data.
See the GTE Data Format Document.
A general description of data granularity as it applies to the IMS appears in the EOSDIS Glossary. Aircraft data sets are available for each individual investigation for each flight through the GTE home page and for each flight (all investigation) from the ASDC GTE Data and Information page. Surface level data are available on a daily basis from both sites.
All data for the TRACE-P mission is contained in the archive. The only additional data products anticipated relevant to TRACE-P are 210Pb from Robert Talbot (University of New Hampshire) and will be added to the archive when received by the GTE project office.
This data is available online or on a CD-ROM via the LaRC ASDC on the GTE Data and Information Page and from the GTE data archive.
The Atmospheric Science Data Center at NASA Langley Research Center and the GTE data archive.
Publication of a portion(s) of the data archive should acknowledge the principal investigator(s) responsible for the data by referencing the appropriate manuscript in the Journal of Geophysical Research, Vol. 108, No. 20 and 21, October 27 and November 16, 2003.
Airborne measurements were made predominately over the western Pacific Ocean. A more detailed description of the surface level environmental characteristics for the experiment region is provided in the individual papers for each investigation included in the Journal of Geophysical Research, Vol. 108, No. 20 and 21, October 27 and November 16, 2003. Additional information may be found in other publications authored by the principal investigators or on the GTE home page.
TRACE-P geographic coverage for the intensive flights out of Hong Kong and Yokota Air Force, Japan was approximately 110E-160E and 10N to 50N. Additional information can be found in the TRACE-P mission overview paper, Jacob et al., [2003].
Flight missions were conducted during February, March and April 2001. Also shown are the takeoff and landing sites. The duration, altitude ranges, ascent and descent rate and flight path of each mission varied depending on the mission objectives and environmental (weather) conditions. The nominal airspeed ranged from greater than 480 knots (approximately 552 mph) at 13 km altitude for the DC-8 to greater than 130 knots (approximately 152 mph) at 7.7 km altitude.
| Data Set Name | Min Lat | Max Lat | Min Lon | Max Lon |
|---|---|---|---|---|
DC-8 Aircraft:
|
0N | 45N | 105E | 120W |
P3-B Aircraft:
|
0N | 45N | 105E | 75W |
|
gte_tracep_dc8_traj_images_fltXX.zip - Plot of Backward Air mass Trajectories gte_tracep_dc8_traj_tab_fltXX.zip - Tabulated Data of Backward Air mass Trajectories |
0N | 45N | 105E | 120W |
| gte_tracepdc8_cld_index.zip - Cloud Index | 10N | 50N | 110W | 120W |
|
gte_tracep_p3b_traj_images_fltXX.zip - Plot of Backward Air mass Trajectories gte_tracep_p3b_traj_tab_fltXX.zip - Tabulated Data of Backward Air mass Trajectories |
0N | 45N | 105E | 75W |
|
gte_tracep_p3b_sat_images_trkmXX.zip - IR, Visible, and Water Vapor Satellite Images gte_tracep_2001mmdd.zip - Satellite Data Products During TRACE-P Mission Period |
0N | 45N | 105E | 120W |
| gte_tracep_prc_plots_2001mmdd-2001mmdd.zip - Ground Based Observations in PRC | 87.6N | 126.6N | 20.0E | 45.7E |
| gte_tracep_ftir_ground.zip - Ground Based FTIR Measurements of C2H2, C2H6, CO, and HCN | 36.2N | 44.4N | 140.1E | 143.8E |
| Ozonesonde Launch Site | Latitude | Longitude |
|---|---|---|
| Trinidad Head, CA | 40.8N | 124.2W |
| Hilo, Hawaii | 19.4N | 155.0W |
| Cheju, Korea | 33.5N | 126.5E |
| Hong Kong Observatory | 22.3N | 114.2E |
| Kagoshima, Japan | 31.6N | 130.6E |
| Naha, Japan | 26.2N | 127.7E |
| Sapporo, Japan | 43.1N | 141.3E |
| Tateno, Japan | 36.1N | 140.1E |
| Taipei, Taiwan | 25.0N | 121.4E |
Resolution varies for each measurement. See Kleb and Scott, [2003a] and [2003b].
See the next section Grid Description for information about the meteorological trajectories. Ozonesondes were launched from nine ground stations.
Ozone data are found at: Satellite images are found at:The meteorological trajectories utilized global gridded meteorological analyses prepared by the European Centre for Medium-Range Weather Forecasts (ECMWF) [Bengtsson, 1985; Hollingsworth et al., 1986, ECMWF, 1995]. The data were available four times daily (0000, 0600, 1200, and 1800 UTC) at 60 vertical levels with a T319 spherical harmonic triangular truncation, interpolated to a 1° x 1° latitude-longitude horizontal grid. The five-day backward trajectories were calculated using a kinematic model, i.e., employing u, v, and w wind components from the ECMWF analyses. Additional details about the trajectory model are given in Fuelberg et al. [1996, 1999, 2000]. Limitations of trajectories are described by Fuelberg et al. [2000], Maloney et al. [2001], Stohl [1995], and Stohl et al. [1998].
TRACE-P aircraft missions were conducted from February 24 through April 10, 2001. Temporal coverage for the DC-8 and P-3B data, meteorological trajectories, and the merged data is from February 24 through April 10, 2001. Ground site measurements and satellite image start dates and end dates are listed below. Ozonesondes were launched from nine ground stations and ozonesonde data are found at the TRACEP OZONESONDES FTP list or TRACEP Ozonesondes page. Visible, infrared, and water-vapor satellite images from GMS-5, GOES-8 and GOES-10 satellites at 4-km resolution were created using McIDAS software for the 2001 TRACE-P field mission. The images can be found at the TRACEP DC8-AIRCRAFT FLIGHT_TRACKS FTP list.
| Data Set Description | Begin Date | End Date |
|---|---|---|
| GTE TRACEP DC8 Aircraft Results | 2/26/2001 | 4/09/2001 |
| GTE TRACEP P3B Aircraft Results | 2/24/2001 | 4/10/2001 |
| Backward air mass trajectories intersecting the DC-8 flight path | 2/26/2001 | 4/09/2001 |
| Cloud index | 2/26/2001 | 4/03/2001 |
| Data merges for the DC-8 data files | 2/26/2001 | 4/09/2001 |
| Backward air mass trajectories intersecting the P3-B flight path | 2/24/2001 | 4/10/2001 |
| Data merges for the P3-B data files | 2/24/2001 | 4/10/2001 |
| Satellite Data Products | 2/24/2001 | 4/10/2001 |
| Chinese Ground Sites | 2/01/2001 | 4/30/2001 |
| GTE FTIR Ground Observations | 1/15/2001 | 6/15/2001 |
| OZONESONDES | 1/05/2000 | 12/27/2001 |
Not all of the parameters are in each data set granule. Also, the ranges vary between data sets and between granules within each data set. Species measured are given in Kleb and Scott, [2003a], [2003b].
The sources of error vary depending on species and measurement environment and are addressed in Kleb and Scott, [2003a], [2003b], the papers included in the TRACE-P special section of the Journal of Geophysical Research, Vol. 108, No. 20 and 21, October 27 and November 16, 2003, and/or papers referenced in that publication and readme files and/or header records associated with each data file.
None reported for the current archive version. See the readme files and header records included with each data set for information provided by the responsible investigator.
The data sets submitted to the ASDC are considered final and no further updates are anticipated. However, modifications will be considered if requested by the investigators or otherwise justified.
Details of data acquisition and materials are addressed in the Fall 2002 AGU TRACE-P Special Session (s) and the papers contained in the Journal of Geophysical Research TRACE-P Special Section (Vol. 108, No. 20 and 21, October 27 and November 16, 2003).
Fall 2002 AGU TRACE-P Special Session(s)
TRACE-P Special Section, Journal of Geophysical Research, Vol. 108, No. 20 and 21, October 27 and November 16, 2003.
Bengtsson, L., Medium-range forecasting--The experience of ECMWF, Bull. Am. Meteorol. Soc., 66, 1133-1146, 1985.
Hollingsworth, A., D.B. Shaw, P. Lonnberg, L. Illari, K. Arpe, and A.J. Simmons, Monitoring of observations and analysis quality by a data assimilation system, Mon. Weather Rev., 114, 861-879, 1986.
European Centre for Medium-Range Weather Forecasts (ECMWF), User guide to ECMWF products 2.1, Meteorol. Bull. M3.2, Reading, England, U.K., 1995.
Fuelberg, H.E., R.O. Loring, Jr., M.V. Watson, M.C. Sinha, K.E. Pickering, A.M. Thompson, G.W. Sachse, D.R. Blake, and M.R. Schoeberl, TRACE-A Trajectory intercomparison 2. Isentropic and kinematic methods, J. Geophys. Res., 101, 23927-23939, 1996.
Fuelberg, H.E., R.E. Newell, S.P. Longmore, W. Zhu, D.J. Westberg, E.V. Browell, D.R. Blake, G.L. Gregory, and G.W. Sachse, A meteorological overview of the PEM-Tropics period, J. Geophys. Res., 104, 5585-5622, 1999.
Fuelberg, H.E., J.R. Hannan, P.F.J. van Velthoven, E. V. Browell, G. Bieberbach, Jr., R.D. Knabb, G.L. Gregory, K.E. Pickering, and H.B. Selkirk, A meteorological overview of the SONEX period. J. Geophys. Res., 105, 3633-3651, 2000.
Jacob, D. J., J. Crawford, M. M. Kleb, V. S. Connors, R. J. Bendura, J. L. Raper, G. W. Sachse, J. Gille, L. Emmons, and J. C. Heald, Transport and chemical evolution over the Pacific (TRACE-P) mission: Design, execution, and first results, J. Geophys. Res., 108(D20), 8781, doi:10.1029/2002JD003276, in press, 2003.
Kleb, M. and A. Scott, Compendium of NASA Data Base for the Global Tropospheric Experiment's Transport and Chemical Evolution Over the Pacific (TRACE-P) Volume I: DC-8, NASA/TM-2003-212429/VOL1, July 2003.
Kleb, M. and A. Scott, Compendium of NASA Data Base for the Global Tropospheric Experiment's Transport and Chemical Evolution Over the Pacific (TRACE-P) Volume 2: DC-8, NASA/TM-2003-212429/VOL2, July 2003.
Maloney, J.C., H.E. Fuelberg, M.A. Avery, J.H. Crawford, D.R. Blake, B.G. Heikes, G.W. Sachse, S.T. Sandholm, H. Singh, and R.W. Talbot, Chemical characteristics of air from different source regions during the second Pacific Exploratory Mission in the Tropics (PEM-Tropics B), J. Geophys. Res., 106, 32609-32625, 2001.
Stohl, A., G. Wotawa, P. Seibert, and H. Kromp-Kolb, Interpolation errors in wind fields as a function of spatial and temporal resolution and their impact on different types of kinematic trajectories. J. Appl. Meteor., 34, 2149-2165, 1995.
Stohl, A., Computation, accuracy, and applications of trajectories - A review and bibliography, Atmos. Environ., 32, 947-966, 1998.
EOSDIS Acronyms | EOSDIS Glossary.
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