African Easterly Wave Climatology, Version 1

AEWC

browse graphicEasterly wave track density per year for the ERA-Interim reanalysis during the period June to November 1995-2010.
The AEWC dataset was created using a new algorithm developed by researchers at Georgia Tech and represents the first attempt to produce a standard easterly wave tracking dataset for the East Pacific, Atlantic, and Africa. The algorithm uses curvature vorticity anomalies to identify the location of easterly waves as a function of time. The dataset provides 6-hourly coverage over a 63-year period (January 1948-December 2010) in the region bounded by 35S-35N x 140W-40E. Data files are derived using four separate atmospheric reanalysis products including: 1) the ERA-40 dataset (covers the period January 1958 to December 2001); 2) the ERA-Interim dataset (covers the period January 1979 to December 2010); the CFS-R dataset (covers the period January 1979 to December 2010); and the NCEP/NCAR I dataset (covers the period January 1948 to December 2010). Other data sources used in the production of the AEWC are the Remote Sensing Systems SSM/I Total Precipitable Water, Rain Rate, and Cloud Liquid Water content products, Claus Brightness Temperature, and Outgoing Longwave Radiation from the NCDC Daily OLR CDR. Each netCDF file contains all the easterly waves that originate in a given year, the isobaric level for easterly wave tracking (600hPa, 700hPa, and 850hPa) and the zone from which the easterly wave began its development. Zones include: Africa (AFR), Central America (CAM), North Atlantic (NAL), Northeast Pacific (NEP), South Atlantic (SAL), South America (SAM), Southeast Pacific (SEP), and Other (OTH). For each easterly wave, the following variables are provided including: wave observation count, wave trajectory id, wave time, wave trough centroid latitude, wave trough centroid longitude, wave trough maximum latitude, mean longitude of wave trough maximum latitude, wave trough minimum latitude, mean longitude of wave trough minimum latitude, wavelength, mean wave trough relative vorticity, maximum wave trough relative vorticity, minimum wave trough relative vorticity, standard deviation wave trough relative vorticity,mean wave trough curvature vorticity, maximum wave trough curvature vorticity, minimum wave trough curvature vorticity, standard deviation wave trough curvature vorticity, mean wave trough shear vorticity, maximum wave trough shear vorticity, minimum wave trough shear vorticity, standard deviation wave trough shear vorticity, mean wave trough Claus brightness temperature, standard deviation wave trough Claus brightness temperature, wave trough Claus brightness temperature area fraction, mean wave trough total precipitable water, standard deviation wave trough total precipitable water, wave trough total precipitable water area fraction, mean wave trough rain rate, standard deviation wave trough rain rate, wave trough rain rate area fraction, mean wave trough cloud liquid water, standard deviation wave trough cloud liquid water, wave trough cloud liquid water area fraction, mean wave trough outgoing longwave radiation, standard deviation wave trough outgoing longwave radiation, wave trough outgoing longwave radiation area fraction, mean wave trough outgoing longwave radiation anomaly, standard deviation wave trough outgoing longwave radiation anomaly.
  • Cite this dataset when used as a source: Users must cite this dataset as: Belanger, James I., Jelinek, Mark T., Curry, Judith A. (2014): "African Easterly Wave Climatology, Version 1." NOAA National Centers for Environmental Information. [indicate subset used]. doi:10.7289/V5ZC80SX [Access Date].
Download Data
Distribution Formats
  • netCDF-4
    • File Compression: ZLIB compression
Distributor Customer Engagement Branch
DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce
1-828-271-4800
ncei.orders@noaa.gov
Dataset Point of Contact James Belanger
Senior Meteorological Scientist
The Weather Company, an IBM business
james.belanger@weather.com
Dataset Point of Contact Hilawe Semunegus
Research Scientist
DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce
Time Period 1948 to 2010 (time interval: 6-hour)
Spatial Bounding Box Coordinates
N: 35.0
S: -35.0
E: 40.0
W: -140.0
Spatial Coverage Map
General Documentation
Processing Documents
  • AEWC Documentation
    • AEWC Documentation
      More information about the AEWC dataset is available in the dataset documentation. Code documentation is also available for a more detailed description of processing steps. (See code tar file for more information)
Associated Resources
Publication Dates
  • publication: 2014-09-17
Edition 1.0
Data Presentation Form Digital model - multi-dimensional digital representation of a feature, process, etc.
Dataset Progress Status Complete - production of the data has been completed
Data Update Frequency Not planned
Purpose The data will primarily be utilized by atmospheric scientists specializing in tropical meteorology. This may include studies of easterly wave genesis, intensification, and decay as well as the relationship between tropical cyclones and easterly waves.
Dataset Citation
  • Cite this dataset when used as a source: Users must cite this dataset as: Belanger, James I., Jelinek, Mark T., Curry, Judith A. (2014): "African Easterly Wave Climatology, Version 1." NOAA National Centers for Environmental Information. [indicate subset used]. doi:10.7289/V5ZC80SX [Access Date].
Cited Authors
  • GIT/EAS > School of Earth and Atmospheric Sciences, Georgia Institute of Technology
  • Belanger, James I.
    GIT/EAS > School of Earth and Atmospheric Sciences, Georgia Institute of Technology
  • Jelinek, Mark T.
    GIT/EAS > School of Earth and Atmospheric Sciences, Georgia Institute of Technology
  • Curry, Judith A.
    GIT/EAS > School of Earth and Atmospheric Sciences, Georgia Institute of Technology
Originators
  • GIT/EAS > School of Earth and Atmospheric Sciences, Georgia Institute of Technology
Principal Investigators
  • Belanger, James I.
    GIT/EAS > School of Earth and Atmospheric Sciences, Georgia Institute of Technology
  • Jelinek, Mark T.
    GIT/EAS > School of Earth and Atmospheric Sciences, Georgia Institute of Technology
  • Curry, Judith A.
    GIT/EAS > School of Earth and Atmospheric Sciences, Georgia Institute of Technology
Publishers
  • DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce
  • DOC/NOAA/NESDIS/NCDC > National Climatic Data Center, NESDIS, NOAA, U.S. Department of Commerce
Theme keywords Global Change Master Directory (GCMD) Science Keywords
  • Earth Science > Climate Indicators > Atmospheric/ocean Indicators > Extreme Weather
  • Earth Science > Climate Indicators > Atmospheric/ocean Indicators > Teleconnections
Global Climate Observing System (GCOS) Essential Climate Variables (ECVs)
  • Atmospheric - Upper-air - Upper-air Wind Speed And Direction
  • Atmospheric - Upper-air - Cloud Properties
Data Center keywords Global Change Master Directory (GCMD) Data Center Keywords
  • DOC/NOAA/NESDIS/NCDC > National Climatic Data Center, NESDIS, NOAA, U.S. Department of Commerce
  • DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce
Platform keywords Global Change Master Directory (GCMD) Platform Keywords
  • GEOSTATIONARY SATELLITES
Instrument keywords Global Change Master Directory (GCMD) Instrument Keywords
  • SSMIS > Special Sensor Microwave Imager/Sounder
Place keywords Global Change Master Directory (GCMD) Location Keywords
  • Ocean > Atlantic Ocean
  • Ocean > Pacific Ocean
  • Continent > Africa
  • Continent > South America
  • Continent > North America > Central America
Data Resolution keywords Global Change Master Directory (GCMD) Horizontal Data Resolution Keywords
  • 100 km - < 250 km or approximately 1 degree - < 2.5 degrees
Global Change Master Directory (GCMD) Vertical Data Resolution Keywords
  • > 1 km
Stratum keywords Global Change Master Directory (GCMD) Location Keywords
  • Vertical Location > Troposphere
Use Constraints
  • Cite this dataset when used as a source: Users must cite this dataset as: Belanger, James I., Jelinek, Mark T., Curry, Judith A. (2014): "African Easterly Wave Climatology, Version 1." NOAA National Centers for Environmental Information. [indicate subset used]. doi:10.7289/V5ZC80SX [Access Date].
  • NCEI cannot assume liability for any damages caused by any errors or omissions in the data, nor as a result of the failure of the data to function on a particular system. NCEI makes no warranty, expressed or implied, nor does the fact of distribution constitute such a warranty. 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.
Fees
  • In most cases, electronic downloads of the data are free, however fees may apply for data certifications, copies of analog materials, and data distribution on physical media.
Lineage information for: dataset
Lineage Statement For more information about data creation, please review the associated documentation.
Processing Environment Data are processed using MATLAB R2012a 64-bit with access to NetCDF 4.1.3.
Processing Documents
    • AEWC Documentation
      • AEWC Documentation
        More information about the AEWC dataset is available in the dataset documentation. Code documentation is also available for a more detailed description of processing steps. (See code tar file for more information)
Source Datasets
  • NCEP/NCAR Reanalysis Data 1
    • NCEP/NCAR Reanalysis Data 1
      More information about the source dataset is available through the link
    • Description of Source: Reanalyses data used in the production of the dataset
    • Temporal extent used: 1948-01 to 2010-12
  • Climate Forecast System Reanalysis (CFSR), for 1979 to 2011
  • ERA-Interim
    • ERA-Interim
      More information about the source dataset is available through the link
    • Description of Source: Reanalyses data used in the production of the dataset
    • Temporal extent used: 1979-01 to 2010-12
  • ERA-40
    • ERA-40
      More information about the source dataset is available through the link
    • Description of Source: Reanalyses data used in the production of the dataset
    • Temporal extent used: 1958-01 to 2001-12
  • Claus Brightness Temperature
    • Claus Brightness Temperature
      More information about the source dataset is available through the link
    • Description of Source: Satellite data used in the production of the dataset
    • Temporal extent used: 1983-07 to 2006-06
  • Remote Sensing Systems SSM/I
    • Remote Sensing Systems SSM/I
      More information about the source dataset is available through the link
    • Description of Source: Satellite data used in the production of the dataset
    • Temporal extent used: 1987-07 to 2010-12
Lineage information for: repository
Processing Steps
  • 2015-04-22T00:00:00 - 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.
Last Modified: 2018-05-04
For questions about the information on this page, please email: ncei.orders@noaa.gov