Performance Technical Report

• Main Author: Fujita, T. T.
• Other Authors: CHICAGO UNIV IL WIND RESEARCH LAB
• Format: Text
• Language: English
• Published: 1991
• Subjects: Meteorology; Physical and Dynamic Oceanography; *CYCLONES; *MARINE METEOROLOGY; PRESSURE; TABLES(DATA); OCEANS; BAROMETRIC PRESSURE; NORTH ATLANTIC OCEAN; NORTH PACIFIC OCEAN; MAGNETIC TAPE; GEOGRAPHIC DISTRIBUTION; ARCTIC REGIONS; LATITUDE; LONGITUDE; NORTHERN HEMISPHERE; DATA BASES; JAPAN; Arctic; Pacific; North Atlantic
• Online Access: http://www.dtic.mil/docs/citations/ADA238575; http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA238575

The purpose of this research is to generate the data base of all cyclones in the northern hemisphere, north of the latitude 20 North for determining the oceanic regions where cyclones develop (deepening of the central pressure) and weaken (filling of the central pressure). Specific regions of the Navy's interest are The North Pacific Ocean, North Atlantic Ocean, and Arctic Oceans. The data base is obtained by examining the 6-hourly National Meteorological Center surface maps and the 12-hourly surface maps from The Japan Meteorological Agency. The input data for generating the magnetic cyclone tape are latitude, longitude, central pressure (PC*) and the radii of the PC* + 16 mb and PC* + 8 mb isobars surrounding or in the vicinity of the cyclone center. After smoothing, the input values are used in computing the differencial values (finite differences) such as pressure deepening in mb/6hrs, pressure filling and the windspeed intensification m/sec in 6 hours. These parameters, both input and computed, are tabulated along with the consecutive number of each cyclone. Original contains color plates: All DTIC and NTIS reproductions will be in black and white.