[Parameters: Topic='ATMOSPHERE', Term='ATMOSPHERIC PRESSURE', Variable_Level_1='ANTICYCLONES/CYCLONES']
Cyclone Tracks - Extratropical N. Hemisphere (DSI-9616)Entry ID: gov.noaa.ncdc.C00065
Abstract: Cyclone Tracks - Extratropical N. Hemisphere is a historical digital data set archived at the National Climatic Data Center (NCDC). The major data variables and parameters are twelve hour positions with direction and speed of movements. The extratropical cyclone movements were digitized from NMC 6-hourly northern hemisphere cyclone position maps. However, the file only contains the 12-hourly positions. A related file is 9629 (C00290) which was prepared for all pressure centers (cyclones and anti cyclones) from the Northern Hemisphere historical map series for the period January 1899 through June 1939.
Purpose: To make a wide range of climatic data available to researchers and the public.
SUPPLEMENTAL INFORMATION: data set
CURRENTNESS REFERENCE: Ground Condition
Data Set Citation
Dataset Originator/Creator: National Climatic Data Center, NESDIS, NOAA, U.S. Department of Commerce
Dataset Title: Cyclone Tracks - Extratropical N. Hemisphere (DSI-9616)
Dataset Release Date: Unknown
Data Presentation Form: tabular digital dataOnline Resource: http://www.ncdc.noaa.gov
Start Date: 1965-05-01Stop Date: 1974-12-31
Quality ATTRIBUTE ACCURACY REPORT: Not provided
LOGICAL CONSISTENCY REPORT: Unknown
COMPLETENESS REPORT: Completeness information not available.
PROCESS DESCRIPTION: The 6-hourly positions were digitized off the NMC Northern Hemisphere cyclone charts ... giving a latitude and longitude. These were then converted to the common extratropical cyclone format which only gives 12-hourly positions. If a 6-hourly position fell within a different 10-degree square than the 12-hourly positions either side of its position, then a 10- degree square was added to the record. The digitized centers were plotted back at 100 percent and laid over the original charts and checked to insure the quality of the digitizing. The direction of movements and speed were then computed based on the digitized 12-hourly positions. Also computed were the 10-degree squares.
PROCESS DATE: Unknown
Access Constraints ACCESS CONSTRAINTS: None
DISTRIBUTION LIABILITY: Every effort has been made to ensure that these data are accurate and reliable within the limits of current NOAA quality control procedures. NOAA can only certify that the data provided to its customers is an authentic copy of the records which were accepted for inclusion in NOAA archives. NOAA 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. NOAA makes no warranty, expressed or implied, nor does the fact of distribution constitute such a warranty.
Use Constraints None
Data Set Progress
Role: DIF AUTHOR
Email: ncdc.orders at noaa.gov
151 Patton Avenue, Room 120
Province or State: NC
Postal Code: 28801-5001
Creation and Review Dates
DIF Creation Date: 2006-12-01
Last DIF Revision Date: 2011-07-21