gov.noaa.ncdc:C00941
eng; USA
utf8
dataset
NOAA National Centers for Environmental Information
ncei.info@noaa.gov
https://www.ncei.noaa.gov/contact
NCEI Contact Information
Information for contacts at NCEI.
information
pointOfContact
2023-09-19
ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data
ISO 19115-2:2009(E)
NOAA Climate Data Record (CDR) of AVHRR Polar Pathfinder Extended (APP-X) Cryosphere, Version 1 (Version Superseded)
Extended AVHRR Polar Pathfinder (APP-x)
2016-02-05
publication
Version 1.0
doi:10.7289/V5MK69W6
NCEI DSI 3710_01
gov.noaa.ncdc:C00941
DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce
publisher
Key, Jeffery
DOC/NOAA/NESDIS/STAR > Center for Satellite Applications and Research, NESDIS, NOAA, U.S. Department of Commerce
Branch Chief
+1 608-263-2605
jeff.key@noaa.gov
originator
Key, Jeffery
DOC/NOAA/NESDIS/STAR > Center for Satellite Applications and Research, NESDIS, NOAA, U.S. Department of Commerce
Branch Chief
+1 608-263-2605
jeff.key@noaa.gov
author
Wang, Xuanji
UWI-MAD/SSEC/CIMSS > Cooperative Institute for Meteorological Satellite Studies, Space Science and Engineering Center, University of Wisconsin, Madison
Research Scientist
+1 608-261-1390
xuanji.wang@ssec.wisc.edu
collaborator
Wang, Xuanji
UWI-MAD/SSEC/CIMSS > Cooperative Institute for Meteorological Satellite Studies, Space Science and Engineering Center, University of Wisconsin, Madison
Research Scientist
+1 608-261-1390
xuanji.wang@ssec.wisc.edu
author
Lui, Yinghui
UWI-MAD/SSEC/CIMSS > Cooperative Institute for Meteorological Satellite Studies, Space Science and Engineering Center, University of Wisconsin, Madison
Research Scientist
+1 608-890-1893
yinghuil@ssec.wisc.edu
collaborator
Lui, Yinghui
UWI-MAD/SSEC/CIMSS > Cooperative Institute for Meteorological Satellite Studies, Space Science and Engineering Center, University of Wisconsin, Madison
Research Scientist
+1 608-890-1893
yinghuil@ssec.wisc.edu
author
NOAA CDR Program
collaborator
NOAA CDR Program
author
NOAA CDR Program
collaborator
NOAA CDR Program
author
DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce
publisher
imageDigital
*Note: This dataset version has been superseded by a newer version. It is highly recommended that users access the current version. Users should only use this version for special cases, such as reproducing studies that used this version.* NOAA Climate Data Record (CDR) of the extended AVHRR Polar Pathfinder (APP-x) cryosphere contains 19 geophysical variables over the Arctic and Antarctic for the period 1982 - present. All of them have undergone various degrees of validation, though not all are considered CDR quality. The variables are (those considered by the developers to be CDR-quality are identified with an asterisk): Surface temperature, all-sky, snow, ice, and land* Surface albedo, all-sky* Sea ice thickness* Surface type Cloud mask* Cloud particle thermodynamic phase Cloud optical depth Cloud particle effective radius Cloud temperature Cloud pressure Cloud type Downwelling shortwave radiation at the surface* Downwelling longwave radiation at the surface* Upwelling shortwave radiation at the surface* Upwelling longwave radiation at the surface* Upwelling shortwave radiation at the TOA* Upwelling longwave radiation at the TOA* Shortwave cloud radiative forcing at the surface Longwave cloud radiative forcing at the surface APP-x data products are mapped to a 25 km EASE grid at two local solar times: 04:00 and 14:00 for the Arctic, and 02:00 and 14:00 for the Antarctica. Using local solar time rather than standard UTC times provides better information on diurnal differences at all locations.
This dataset provides a high quality Climate Data Record (CDR) for use in polar climate studies, climate monitoring, and model verification.
completed
historicalArchive
superseded
DOC/NOAA/NESDIS/NCDC > National Climatic Data Center, NESDIS, NOAA, U.S. Department of Commerce
NOAA Climate Data Record Program Office
+1 (828) 271-4800
+1 (828) 271-4328
151 Patton Avenue
Veach-Baley Federal Building, Room 447
Asheville
NC
28801-5001
USA
app_contacts@noaa.gov
https://www.ncei.noaa.gov/products/climate-data-records
HTTPS
Web Browser
CDR Program Contacts
Contact information for the CDR Program.
information
8:00 - 6:00 Eastern
pointOfContact
notPlanned
https://www.ncei.noaa.gov/pub/data/metadata/images/C00941_appx_surface_albedo.jpg
APP-x broadband surface albedo
JPEG
Earth Science > Cryosphere
theme
Global Change Master Directory (GCMD) Science Keywords
2018
revision
Version 8.6
Global Change Data Center, Science and Exploration Directorate, Goddard Space Flight Center (GSFC) National Aeronautics and Space Administration (NASA)
https://earthdata.nasa.gov/about/gcmd/global-change-master-directory-gcmd-keywords
HTTPS
Web Browser
Global Change Master Directory (GCMD) Keywords
The information provided on this page seeks to define how the GCMD Keywords are structured, used and accessed. It also provides information on how users can participate in the further development of the keywords.
information
publisher
Oceanic - Surface - Sea Ice
Atmospheric - Upper-air - Cloud Properties
Terrestrial - Albedo
Atmospheric - Surface - Surface Radiation Budget (including Solar Irradiance)
Atmospheric - Surface - Air Temperature
Oceanic - Surface - Sea-surface Temperature
theme
Global Climate Observing System (GCOS) Essential Climate Variables (ECVs)
2017
publication
Release 2017
World Meteorological Organization, United Nations
https://public.wmo.int/en/programmes/global-climate-observing-system/essential-climate-variables
HTTP
Information
GCOS Essential Climate Variables
Overview of the GCOS Essential Climate Variables.
information
custodian
Geographic Region > Arctic
Continent > Antarctica
place
Global Change Master Directory (GCMD) Location Keywords
2018
revision
Version 8.6
Global Change Data Center, Science and Exploration Directorate, Goddard Space Flight Center (GSFC) National Aeronautics and Space Administration (NASA)
https://earthdata.nasa.gov/about/gcmd/global-change-master-directory-gcmd-keywords
HTTPS
Web Browser
Global Change Master Directory (GCMD) Keywords
The information provided on this page seeks to define how the GCMD Keywords are structured, used and accessed. It also provides information on how users can participate in the further development of the keywords.
information
publisher
Vertical Location > Land Surface
Vertical Location > Sea Surface
stratum
Global Change Master Directory (GCMD) Location Keywords
2018
revision
Version 8.6
Global Change Data Center, Science and Exploration Directorate, Goddard Space Flight Center (GSFC) National Aeronautics and Space Administration (NASA)
https://earthdata.nasa.gov/about/gcmd/global-change-master-directory-gcmd-keywords
HTTPS
Web Browser
Global Change Master Directory (GCMD) Keywords
The information provided on this page seeks to define how the GCMD Keywords are structured, used and accessed. It also provides information on how users can participate in the further development of the keywords.
information
publisher
NOAA Climate Data Record (CDR) Program
NOAA OneStop Project
project
Global Change Master Directory (GCMD) Project Keywords
2018
revision
Version 8.6
Global Change Data Center, Science and Exploration Directorate, Goddard Space Flight Center (GSFC) National Aeronautics and Space Administration (NASA)
https://earthdata.nasa.gov/about/gcmd/global-change-master-directory-gcmd-keywords
HTTPS
Web Browser
Global Change Master Directory (GCMD) Keywords
The information provided on this page seeks to define how the GCMD Keywords are structured, used and accessed. It also provides information on how users can participate in the further development of the keywords.
information
publisher
AVHRR > Advanced Very High Resolution Radiometer
instrument
Global Change Master Directory (GCMD) Instrument Keywords
2018
revision
Version 8.6
Global Change Data Center, Science and Exploration Directorate, Goddard Space Flight Center (GSFC) National Aeronautics and Space Administration (NASA)
https://earthdata.nasa.gov/about/gcmd/global-change-master-directory-gcmd-keywords
HTTPS
Web Browser
Global Change Master Directory (GCMD) Keywords
The information provided on this page seeks to define how the GCMD Keywords are structured, used and accessed. It also provides information on how users can participate in the further development of the keywords.
information
publisher
NOAA POES > NOAA Polar Orbiting Environmental Satellites
platform
Global Change Master Directory (GCMD) Platform Keywords
2018
revision
Version 8.6
Global Change Data Center, Science and Exploration Directorate, Goddard Space Flight Center (GSFC) National Aeronautics and Space Administration (NASA)
https://earthdata.nasa.gov/about/gcmd/global-change-master-directory-gcmd-keywords
HTTPS
Web Browser
Global Change Master Directory (GCMD) Keywords
The information provided on this page seeks to define how the GCMD Keywords are structured, used and accessed. It also provides information on how users can participate in the further development of the keywords.
information
publisher
10 km - < 50 km or approximately .09 degree - < .5 degree
dataResolution
Global Change Master Directory (GCMD) Horizontal Data Resolution Keywords
2018
revision
Version 8.6
Global Change Data Center, Science and Exploration Directorate, Goddard Space Flight Center (GSFC) National Aeronautics and Space Administration (NASA)
https://earthdata.nasa.gov/about/gcmd/global-change-master-directory-gcmd-keywords
HTTPS
Web Browser
Global Change Master Directory (GCMD) Keywords
The information provided on this page seeks to define how the GCMD Keywords are structured, used and accessed. It also provides information on how users can participate in the further development of the keywords.
information
publisher
Satellite
product
Keyword Thesaurus Title
DOC/NOAA/NESDIS/NCDC > National Climatic Data Center, NESDIS, NOAA, U.S. Department of Commerce
DOC/NOAA/NESDIS/STAR > Center for Satellite Applications and Research, NESDIS, NOAA, U.S. Department of Commerce
dataCentre
Global Change Master Directory (GCMD) Data Center Keywords
2018
revision
Version 8.6
Global Change Data Center, Science and Exploration Directorate, Goddard Space Flight Center (GSFC) National Aeronautics and Space Administration (NASA)
https://earthdata.nasa.gov/about/gcmd/global-change-master-directory-gcmd-keywords
HTTPS
Web Browser
Global Change Master Directory (GCMD) Keywords
The information provided on this page seeks to define how the GCMD Keywords are structured, used and accessed. It also provides information on how users can participate in the further development of the keywords.
information
publisher
*Note: This dataset version has been superseded by a newer version. It is highly recommended that users access the current version. Users should only use this version for special cases, such as reproducing studies that used this version.*
Uncertainties in most of the retrieve parameters (e.g., surface temperature, cloud optical depth, etc.) are smallest in the presence of sunlight ("polar day") and largest during the polar winter. Cloud detection in the polar regions at night is notoriously difficult. All other retrieved parameters are in one way or another dependent upon cloud detection.
See the Algorithm Theoretical Basis Document for a description of use limitations.
otherRestrictions
Cite as: Key, Jeffrey; Wang, Xuanji; Liu, Yinghui; and NOAA CDR Program (2014). NOAA Climate Data Record of AVHRR Polar Pathfinder Extended (APP-X), Version 1. [indicate subset used]. NOAA National Centers for Environmental Information. doi:10.7289/V5MK69W6 [access date].
otherRestrictions
See the Use Agreement for this CDR available on the CDR page.
otherRestrictions
Distribution liability: NOAA and NCEI make no warranty, expressed or implied, regarding these data, nor does the fact of distribution constitute such a warranty. NOAA and NCEI cannot assume liability for any damages caused by any errors or omissions in these data. If appropriate, NCEI can only certify that the data it distributes are an authentic copy of the records that were accepted for inclusion in the NCEI archives.
otherRestrictions
Use liability: NOAA and NCEI cannot provide any warranty as to the accuracy, reliability, or completeness of furnished data. Users assume responsibility to determine the usability of these data. The user is responsible for the results of any application of this data for other than its intended purpose.
NCEI Dataset Landing Page for the Current Version
https://doi.org/10.25921/AE96-0E57
Landing Page
NCEI Dataset Landing Page for the Current Version
Landing page for the Current Version.
information
crossReference
collection
Data Stewardship Maturity Report for NOAA Climate Data Record (CDR) of AVHRR Polar Pathfinder Extended (APP-X) Cryosphere
2022
publication
NOAA Institutional Repository
publisher
https://doi.org/10.25923/9gkj-0x21
HTTPS
Web Browser
DSMR Publication at the NOAA Institutional Repository
Report documenting the Scientific Data Stewardship Maturity for this dataset.
information
crossReference
sciencePaper
Data Stewardship Maturity Report for NOAA Climate Data Record (CDR) of AVHRR Polar Pathfinder Extended (APP-X) Cryosphere
2021
publication
NOAA Institutional Repository
publisher
https://doi.org/10.25923/9gkj-0x21
HTTPS
Web Browser
DSMR Publication at the NOAA Institutional Repository
Report documenting the Scientific Data Stewardship Maturity for this dataset.
information
crossReference
sciencePaper
Arctic Surface, Cloud, and Radiation Properties Based on the AVHRR Polar Pathfinder Dataset. Part I: Spatial and Temporal Characteristics
2005
publication
18 (14), 2558-2574
Journal of Climate
publisher
https://doi.org/10.1175/JCLI3438.1
HTTPS
Web Browser
Journal of Climate Article
Article landing page.
information
crossReference
sciencePaper
High-latitude surface temperature estimates from thermal satellite data
1997
publication
61, 302-309
Remote Sensing of Environment
publisher
https://doi.org/10.1016/S0034-4257(97)89497-7
HTTPS
Web Browser
Remote Sensing of Environment Article
Article landing page.
information
crossReference
sciencePaper
Cloud cover analysis with Arctic AVHRR, part 1: cloud detection
1992
publication
97 (D5), 5885-5893
Journal of Geophysical Research
publisher
https://doi.org/10.1029/JD094iD15p18521
HTTPS
Web Browser
Journal of Geophysical Research Article
Article landing page.
information
crossReference
sciencePaper
Cloud particle phase determination with the AVHRR
2000
publication
36 (10), 1797-1805
Journal of Applied Meteorology
publisher
https://doi.org/10.1175/1520-0450-39.10.1797
HTTPS
Web Browser
Journal of Applied Meteorology and Climatology Article
Article landing page.
information
crossReference
sciencePaper
A thermodynamic model for estimating sea and lake ice thickness with optical satellite data
2010
publication
115, C12035
Journal of Geophysical Research
publisher
https://doi.org/10.1029/2009JC005857
HTTPS
Web Browser
Journal of Geophysical Research Article
Article landing page.
information
crossReference
sciencePaper
NOAA Climate Data Record (CDR) of AVHRR Polar Pathfinder (APP) Cryosphere, Version 1
2016-01
publication
DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce
publisher
https://doi.org/10.7289/V5BC3WHM
HTTPS
Web Browser
NCEI landing page for the APP CDR
Related dataset landing page.
information
crossReference
project
grid
25000
eng; USA
climatologyMeteorologyAtmosphere
1
-180.0
180.0
-90.0
90.0
ground condition
1982
2019
12
longitude
float
longitude of EASE Grid 25km resolution in the polar regions, Arctic (361,361), Antarctic (321,321) (longitude)
latitude
float
latitude of EASE Grid 25km resolution in the polar regionsArctic (361,361), Antarctic (321,321) (latitude)
longitude
float
longitude of EASE Grid 25km resolution in the polar regions, Arctic (361,361), Antarctic (321,321) (longitude)
latitude
float
latitude of EASE Grid 25km resolution in the polar regionsArctic (361,361), Antarctic (321,321) (latitude)
time
double
Days since 1982-01-01 00:00:00 (time)
crs
float
cdr_surface_temperature
float
NOAA CDR of surface skin temperature (surface_temperature)
cdr_surface_albedo
float
NOAA CDR of surface broadband albedo (surface_albedo)
cdr_surface_downwelling_shortwave_flux
float
NOAA CDR of surface downwelling shortwave radiative flux (surface_downwelling_shortwave_flux)
cdr_surface_downwelling_longwave_flux
float
NOAA CDR of surface downwelling longwave radiative flux (surface_downwelling_longwave_flux)
cdr_surface_upwelling_shortwave_flux
float
NOAA CDR of surface upwelling shortwave radiative flux (surface_upwelling_shortwave_flux)
cdr_surface_upwelling_longwave_flux
float
NOAA CDR of surface upwelling longwave radiative flux (surface_upwelling_longwave_flux)
cdr_cloud_binary_mask
short
NOAA CDR of cloud mask
cdr_sea_ice_thickness
float
NOAA CDR of sea ice thickness (sea_ice_thickness)
cdr_toa_net_downward_shortwave_flux
float
NOAA CDR of TOA net downward shortwave radiative flux (toa_net_downward_shortwave_flux)
cdr_toa_outgoing_shortwave_flux
float
NOAA CDR of TOA outgoing shortwave radiative flux (toa_outgoing_shortwave_flux)
cdr_toa_outgoing_longwave_flux
float
NOAA CDR of TOA outgoing longwave radiative flux (toa_outgoing_longwave_flux)
surface_type
short
surface type
cloud_particle_phase
short
cloud particle phase
cloud_particle_radius
float
cloud particle radius
cloud_optical_depth
float
cloud optical depth
cloud_top_pressure
float
cloud top pressure
cloud_top_temperature
float
cloud top temperature
cloud_type
short
cloud type
surface_shortwave_cloud_radiative_forcing
float
surface shortwave cloud radiative forcing
surface_longwave_cloud_radiative_forcing
float
surface longwave cloud radiative forcing
NOAA National Centers for Environmental Information
ncei.info@noaa.gov
https://www.ncei.noaa.gov/contact
NCEI Contact Information
Information for contacts at NCEI.
information
distributor
In most cases, electronic downloads of the data are free. However, fees may apply for custom orders, data certifications, copies of analog materials, and data distribution on physical media.
Contact NCEI for other distribution options and instructions.
XML
NetCDF
4
The NetCDF data files comply with the Climate and Forecast (CF) Metadata Conventions and the NetCDF Attribute Convention for Dataset Discovery (ACDD).
NetCDF
4
The NetCDF data files comply with the Climate and Forecast (CF) Metadata Conventions and the NetCDF Attribute Convention for Dataset Discovery (ACDD).
NetCDF
4
The NetCDF data files comply with the Climate and Forecast (CF) Metadata Conventions and the NetCDF Attribute Convention for Dataset Discovery (ACDD).
https://doi.org/10.7289/V5MK69W6
HTTPS
Landing Page
NCEI Dataset Landing Page
Landing page for the dataset.
information
https://www.ncei.noaa.gov/contact
HTTPS
Web Browser
Contact NCEI
Contact NCEI for more information and to request access to the archived data. Requests are subject to NCEI order fulfillment constraints.
offline
dataset
This Climate Data Record (CDR) were produced by NOAA Center for Satellite Applications and Research (STAR) and University of Wisconsin and are archived at the NOAA National Climatic Data Center (NCDC).
For a complete description of the processing steps, see the Algorithm Theoretical Basis Document and Data Flow Diagram.
DOC/NOAA/NESDIS/STAR > Center for Satellite Applications and Research, NESDIS, NOAA, U.S. Department of Commerce
processor
APPX Source Code
Version 1.0
DOC/NOAA/NESDIS/NCDC > National Climatic Data Center, NESDIS, NOAA, U.S. Department of Commerce
publisher
https://www.ncei.noaa.gov/pub/data/sds/cdr/CDRs/AVHRR_Extended_Polar_Pathfinder/SourceCode_01B-24b.tar.gz
HTTPS
Web Browser
CDR Source Code
This source code is for reference only. The source code is provided to maintain transparency of the algorithm and processes used in creating the Climate Data Record (CDR). The source code is not intended to be portable to any computer system(s) beyond that of the original CDR producer's environment.
download
APP-X Processing Overview
2017
publication
Version 1.0
DOC/NOAA/NESDIS/NCDC > National Climatic Data Center, NESDIS, NOAA, U.S. Department of Commerce
publisher
https://www.ncei.noaa.gov/pub/data/sds/cdr/CDRs/AVHRR_Extended_Polar_Pathfinder/DataFlowDiagram_01B-24b.pdf
HTTPS
Web Browser
CDR Data Flow Diagram
Data processing flowchart for the CDR product.
information
Climate Algorithm Theoretical Basis Document (C-ATBD) Extended AVHRR Polar Pathfinder (APP-x)
2017
publication
Version 1.0
DOC/NOAA/NESDIS/NCDC > National Climatic Data Center, NESDIS, NOAA, U.S. Department of Commerce
publisher
https://www.ncei.noaa.gov/pub/data/sds/cdr/CDRs/AVHRR_Extended_Polar_Pathfinder/AlgorithmDescription_01B-24b.pdf
HTTPS
Web Browser
CDR Algorithm Description
Algorithm Theoretical Basis Document for the CDR product.
information
See Algorithm Citation
AVHRR Polar Pathfinder (APP)
NOAA Climate Data Record (CDR) of AVHRR Polar Pathfinder (APP) Climate Data Record (CDR)
doi:10.7289/V5BC3WHM
DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce
publisher
https://doi.org/10.7289/V5BC3WHM
HTTPS
Web Browser
NOAA Climate Data Record (CDR) of AVHRR Polar Pathfinder (APP) Climate Data Record (CDR)
Landing page for APP CDR input
information
1
0
180
-90
90
1982
2019
repository
NOAA National Centers for Environmental Information
NOAA created the National Centers for Environmental Information (NCEI) by merging NOAA's National Climatic Data Center (NCDC), National Geophysical Data Center (NGDC), and National Oceanographic Data Center (NODC), including the National Coastal Data Development Center (NCDDC), per the Consolidated and Further Continuing Appropriations Act, 2015, Public Law 113-235. NCEI launched publicly on April 22, 2015.
2015-04-22T00:00:00
dataset
Data Stewardship
Data Stewardship Maturity Assessment
MM-Stew
The Data Stewardship Maturity Matrix (DSMM) is a unified framework that defines criteria for each of nine components based on measurable practices, which can be used to apply a progressive, 6-level rating to an individual dataset, representing stewardship maturity stages rated as Not Assessed or Not Available (Level 0), adHoc (Level 1), minimum (Level 2), intermediate (Level 3), advanced (Level 4), and optimal (Level 5).
Data Stewardship Maturity Assessment was evaluated by the metadata content editor for the NOAA OneStop project using the Scientific Data Stewardship Maturity Assessment Model Template v4.0.
The Scientific Data Stewardship Maturity Assessment Model Template
2016-06-27
publication
NCDC-CICS-SMM_0001_Rev.1 v4.0 06/27/2016
doi:10.10.6084/m9.figshare.1211954
Peng, Ge
CICS-NC/NCEI
author
https://doi.org/10.6084/m9.figshare.1211954
HTTPS
Web Browser
The Scientific Data Stewardship Maturity Assessment Model Template
Landing page for quality evaluation procedure.
information
2016-06-27T00:00:00
intermediate
minimal
minimal
advanced
intermediate
advanced
intermediate
advanced
advanced
asNeeded
Bulk metadata change applied on 2023-06-23. See version control repository history for metadata change details.