TOVS Pathfinder Path-P Daily and Monthly Polar Gridded Atmospheric Parameters
Entry ID: NSIDC-0027

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Summary
Abstract: The TIROS-N Operational Vertical Sounder (TOVS) Polar Pathfinder (Path-P) data set consists of gridded daily and monthly Arctic and Antarctic atmospheric data derived from various NOAA satellites. TOVS Path-P daily files are available for the Northern and Southern Hemispheres from 60 degrees poleward at 100 km gridded spatial resolution in an Equal-Area Scalable Earth Grid (EASE-Grid). TOVS Path-P monthly files are available for the Northern Hemisphere only from 60 degrees poleward at 100 km gridded spatial resolution in EASE-Grid. Daily and monthly Northern Hemisphere data are available from January 1979 through current processing, and daily Southern Hemisphere data are available from July 1979 through current processing. Data were created from a modified version of the Improved Initialization Inversion Algorithm (3I) (Chedin et al. 1985), a physical-statistical retrieval method improved for use in identifying geophysical variables in snow- and ice-covered areas (Francis 1994). Variables retrieved from satellite-observed radiances for this product include atmospheric temperature, water vapor, skin surface temperature, total effective cloud fraction, cloud top pressure and temperature, solar zenith elevation, surface pressure, turning angle between geostrophic wind and surface stress over ice, emissivity, boundary layer stratification, and geostrophic drag coefficient. The algorithm used to generate these grids has been validated through comparisons with surface observations from the North Pole drifting meteorological stations (Schweiger et al. 1999). The complete TOVS data set is available via FTP in Hierarchical Data Format (HDF). Users may also order subsets of the data for any of the parameters listed above or for specific spatial or temporal coverage. Data users are encouraged to register before accessing the TOVS data. Registered users automatically receive release notes via e-mail containing notification of data manipulation or formatting modifications.

Related URL
Link: VIEW PROJECT HOME PAGE
Description: Path-P: TOVS Polar Pathfinder Gridded Daily Arctic Atmospheric Data from TOVS


Link: VIEW PROJECT HOME PAGE
Description: DAAC Data: The NOAA/NASA Polar Pathfinder Program


Link: VIEW PROJECT HOME PAGE
Description: Path-P: TOVS Polar Pathfinder Gridded Daily Arctic Atmospheric Data fromTOVS


Link: VIEW RELATED INFORMATION
Description: EASE-Grid Data


Geographic Coverage
 N: -60.0 S: -90.0  E: 180.0  W: -180.0
 N: 90.0 S: 60.0  E: 180.0  W: -180.0

Data Set Citation
Dataset Originator/Creator: Francis, J. A. and A. J. Schweiger.
Dataset Title: TOVS Pathfinder Path-P Daily and Monthly Polar Gridded Atmospheric Parameters
Dataset Release Date: 1999-09-01
Dataset Release Place: Boulder, Colorado USA
Dataset Publisher: NSIDC DAAC: NASA DAAC at the National Snow and Ice Data Center
Online Resource: http://nsidc.org/data/NSIDC-0027


Temporal Coverage
Start Date: 1979-07-12

Start Date: 1979-01-01


Location Keywords
GEOGRAPHIC REGION > NORTHERN HEMISPHERE
GEOGRAPHIC REGION > SOUTHERN HEMISPHERE


Data Resolution
Latitude Resolution: 100 km
Longitude Resolution: 100 km
Temporal Resolution: to


Science Keywords
ATMOSPHERE >ATMOSPHERIC TEMPERATURE >AIR TEMPERATURE    [Definition]
ATMOSPHERE >ATMOSPHERIC RADIATION >EMISSIVITY    [Definition]
ATMOSPHERE >ATMOSPHERIC WINDS >WIND STRESS >GEOSTROPHIC DRAG COEFFICIENT    [Definition]
ATMOSPHERE >ATMOSPHERIC WATER VAPOR >PRECIPITABLE WATER    [Definition]
ATMOSPHERE >ATMOSPHERIC TEMPERATURE >SKIN TEMPERATURE    [Definition]
ATMOSPHERE >ATMOSPHERIC TEMPERATURE >SURFACE AIR TEMPERATURE    [Definition]
OCEANS >OCEAN WINDS >WIND STRESS    [Definition]
ATMOSPHERE >CLOUDS >CLOUD PROPERTIES >CLOUD TOP PRESSURE    [Definition]
ATMOSPHERE >CLOUDS >CLOUD PROPERTIES >CLOUD TOP TEMPERATURE    [Definition]
ATMOSPHERE >CLOUDS >CLOUD PROPERTIES >CLOUD FREQUENCY    [Definition]


ISO Topic Category
CLIMATOLOGY/METEOROLOGY/ATMOSPHERE


Platform
NOAA-10 >National Oceanic & Atmospheric Administration-10    [Information]
NOAA-11 >National Oceanic & Atmospheric Administration-11    [Information]
NOAA-12 >National Oceanic & Atmospheric Administration-12    [Information]
NOAA-13 >National Oceanic & Atmospheric Administration-13    [Information]
NOAA-14 >National Oceanic & Atmospheric Administration-14    [Information]
NOAA-6 >National Oceanic & Atmospheric Administration-6    [Information]
NOAA-7 >National Oceanic & Atmospheric Administration-7    [Information]
NOAA-8 >National Oceanic & Atmospheric Administration-8    [Information]
NOAA-9 >National Oceanic & Atmospheric Administration-9    [Information]


Instrument
HIRS >High Resolution Infrared Radiation Sounder    [Information]
MSU >Microwave Sounding Unit    [Information]
SOUNDERS    [Information]
TOVS >TIROS Operational Vertical Sounder    [Information]


Project
CEAREX >Coordinated Eastern Arctic Experiment    [Information]
EOSDIS >Earth Observing System Data Information System    [Information]
ESIP >Earth Science Information Partners Program    [Information]
NOAA/NASA PATHFINDER >NOAA/NASA Pathfinder Program    [Information]


Quality
The algorithm used to generate these grids has been validated directly through comparisons with surface observations from the CEAREX experiment and with radiosonde data from Soviet ice stations. Comparisons with other TOVS retrieval algorithms provided further validation. Additionally, Schweiger et al. (1999) found a strong correlation between the TOVS Path-P data and surface cloud observations obtained from the North Polar drifting meteorological stations, which indicates that the TOVS data effectively represent annual cloud cover.


Access Constraints
Users are strongly encouraged to register before accessing data. Registered users automatically receive release notes via e-mail containing notification of data manipulation or formatting modifications.


Keywords
Atmospheric Stratification
Boundary Layer
Boundary Layer Stratification
Cloud Fraction
Cloud Properties
Cloud Top Pressure
Cloud Tops
Cloud Top Temperature
DAAC
EOSDIS
Geostrophic Drag Coefficient
Geostrophic Wind
Humidity Profiles
Ice
ICE SURFACE SKIN TEMPERATURE
INITIALIZATION INVERSION ALGTHM
NOAA/NASA Pathfinder
North Polar Basin
NSIDC DAAC
Ocean Surface Skin Temperature
Path P
Polar Exchange At Sea Surface
Poles
SNOW ICE
Temperature Profiles
TOVS
Turning Angle


Data Set Progress
IN WORK


Data Center
NSIDC Distributed Active Archive Center    [Information]
Data Center URL: http://nsidc.org/daac/index.html

Data Center Personnel
Name: NSIDC USER SERVICES
Phone: +1 (303) 492-6199
Fax: +1 (303) 492-2468
Email: nsidc at nsidc.org
Contact Address:
National Snow and Ice Data Center
CIRES, 449 UCB
University of Colorado
City: Boulder
Province or State: CO
Postal Code: 80309-0449
Country: USA


National Snow and Ice Data Center    [Information]
Data Center URL: http://nsidc.org

Data Center Personnel
Name: NSIDC USER SERVICES
Phone: +1 (303) 492-6199
Fax: +1 (303) 492-2468
Email: nsidc at nsidc.org
Contact Address:
National Snow and Ice Data Center
CIRES, 449 UCB
University of Colorado
City: Boulder
Province or State: CO
Postal Code: 80309-0449
Country: USA



Distribution
Distribution_Media: FTP
Distribution_Size: 494.5 - 760.6 MB
Distribution_Format: HDF


Personnel
JENNIFER A. FRANCIS
Role: INVESTIGATOR
Phone: 732 688 2382
Email: francis at imcs.rutgers.edu
Contact Address:
Institute of Marine and Coastal Sciences
Rutgers University
City: New Brunswick
Province or State: New Jersey
Country: USA


AXEL J. SCHWEIGER
Role: INVESTIGATOR
Phone: 206-543-1312
Fax: 206-543-3521
Email: axel at apl.washington.edu
Contact Address:
Applied Physics Laboratory
University of Washington
1013 NE 40th Street
City: Seattle
Province or State: WA
Postal Code: 98105-6698
Country: USA


NSIDC USER SERVICES
Role: TECHNICAL CONTACT
Phone: +1 (303) 492-6199
Fax: +1 (303) 492-2468
Email: nsidc at nsidc.org
Contact Address:
National Snow and Ice Data Center
CIRES, 449 UCB
University of Colorado
City: Boulder
Province or State: CO
Postal Code: 80309-0449
Country: USA


Publications/References
Armstrong, R. L. and M. J. Brodzik. 1995. An Earth-gridded SSM/I Data Set for Cryospheric Studies and Global Change Monitoring. Advances in Space Research 16:155-63. Brodzik, M. J. 1998. The EASE-Grid, A Versatile Set of Equal-Area Projections and Grids. Special report to the National Snow and Ice Data Center, Boulder, Colorado USA. Brodzik, M. J. 1998. Summary of NOAA/NASA Polar Pathfinder Grid Relationships. Special report to the National Snow and Ice Data Center, Boulder, Colorado USA. Chedin, A., N. A. Scott, C. Wahiche, P. Moulineier. 1985. The Improved Initialization Inversion Method: A high Resolution Physical Method for Temperature Retrievals from Satellites of the TIROS-N Series. Journal of Climate and Applied Meteorology pp. 62-65. Chiaachio, M., J. Francis, and P. W. Stackhouse, Jr. 1998. Evaluation and Development of Nighttime Arctic Cloud Base Algorithms for CERES. American Meteorological Society 5th Conference on Polar Meteorology and Oceans. pp. 300-05. Francis, J., A. Munchow, and R. Cermak. 1998. Analyses of Long-term 10-meter Winds over the Arctic Basin. American Meteorological Society 5th Conference on Polar Meteorology and Oceans. pp. 66-68. Francis, J. and A. Schweiger. 1999. A New Window to the Arctic. Journal of Climate 12(8) (August): 2189-2213, Part I. Francis, J. A. 1994. Improvements to TOVS Retrievals over Sea Ice and Applications to Estimating Arctic Energy Fluxes. Journal of Geophysical Research 99(D5):10,395-408. Francis, J. and A. Schweiger. 1998. The NASA/NOAA TOVS Polar Pathfinder: 18 Years of Arctic data. American Meteorological Society 5th Conference on Polar Meteorology and Oceans. 24:128-43. Francis, J. A. 1994. Improvements to TOVS Retrievals over Sea Ice and Applications to Estimating Arctic Energy Fluxes. Journal of Geophysical Research 99(D5):10,395-408. Goddard Space Flight Center. 1994. EOSDIS Version 0 Data Product Implementation Guidelines. Draft Version 1.0 (March 1, 1994). GSFC 50-003-04. GSFC. Greenbelt, MD. Groves, D. G. 1998. A New Moisture Budget of the Arctic Atmosphere Derived from 19 Years of Daily TOVS Satellite Moisture Retrievals and NCEP Reanalysis Winds. American Meteorological Society 5th Conference on Polar Meteorology and Oceans. pp. 107-12. Groves, D. G. 1998. Temporal Variability of Arctic Atmospheric Moisture Budget Quantities Derived from Daily TOVS Satellite Moisture Retrievals and NCEP Reanalysis Winds. American Meteorological Society 5th Conference on Polar Meteorology and Oceans. pp. 380-82. Key, J., D. Slayback, C. Xu, and A. Schweiger. 1998. New Climatologies of Polar Clouds and Radiation Based on the ISCCP 'D' Products. American Meteorological Society 5th Conference on Polar Meteorology and Oceans. pp. 227-32. National Center for Supercomputing Applications. 1994. HDF Reference Manual. Version 3.3. University of Illinois at Urbana-Champaign. National Oceanic and Atmospheric Administration. 1991. NOAA Polar Orbiter Data Users Guide. Washington, D.C.: National Environmental Satellite, Data and Information Service, National Climatic Data Center Satellite Data Services Division. Overland, J. E., and R. L. Colony. 1994. Geostrophic Drag Coefficients over the Central Arctic Derived from Soviet Drifting Station Data. Tellus. 46(A):75-85. Overland, J. E., and K. L. Davidson. 1992. Geostrophic Drag Coefficients over Sea Ice. Tellus. 44(A):54-66. Schweiger, A. J., R. W. Lindsay, J. R. Key, and J. A. Francis. 1999. Arctic Clouds in Multiyear Satellite Data Sets. Geophysical Research Letters 26(13):1,845-48. Document is also available online at http://www.agu.org/GRL/articles/1999GL900479/GL841W01.pdf . Schweiger A., C. Fowler, J. Key, J. Maslanik, J. Francis, R. Armstrong, M. J. Brodzik, T. Scambos, T. Haran, M. Ortmeyer, S. Khalsa, D. Rothrock, R. Weaver. 1998. P-Cube: A Multi-sensor Data Set for Polar Climate Research. American Meteorological Society 5th Conference on Polar Meteorology and Oceans. pp. 136-141. Schweiger, A., Francis, J. 1994. TOVS Pathfinder Path-P Gridded Daily and Monthly Arctic Atmospheric Data from TOVS User's Guide. Draft version 0.1. University of Washington, Seattle. Schweiger, A. J., R. W. Lindsay, J. A. Francis, J. R. Key, J. Intrieri, M. Shupe. Validation of TOVS Path-P Data During SHEBA. Submitted to Journal of Geophysical Research, May 2000. (http://psc.apl.washington.edu/pathp/html/publications/papers_list.h...) Stubenrauch, C. J, W. B. Rossow, F. Cheruy, A. Chedin and N. A. Scott. 1999. Clouds as Seen by Satellite Sounders (3) and Imagers (ISCCP), Part I. Evaluation of Cloud Parameters. Journal of Climate 12 (8) (August): 2189-2213.

Creation and Review Dates
DIF Creation Date: 1999-09-01
Last DIF Revision Date: 2014-07-16

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