Tropical Cyclone Gyan
● Data reliability: ReliableWeather satellites monitored it throughout, so its track and intensity are relatively accurate (Atlantic and E. Pacific since 1966, other basins since 1980).
Gyan at 1981-12-18 20:00:00 (BeijingTime) 在South Pacific首次被记录, peak intensity 为Category 4 tropical cyclone , max wind 约 55.6 m/s (1 分钟平均) , minimum central pressure 925 hPa, at 1981-12-29 20:00:00前后结束, total 记录 45 track points (6 h一个) . 曾Landfall或贴近land.
| Time (BeijingTime) | Position | Category (local) | wind speed m/s | Pressure hPa |
|---|
| 1981-12-18 20:00 | -9.0°S, 172.0°E | Tropical Depression | 16.5 | 997 |
| 1981-12-19 08:00 | -9.5°S, 170.0°E | Tropical Depression | 16.5 | 997 |
| 1981-12-19 20:00 | -9.8°S, 169.0°E | Category 1 Tropical Cyclone | 22.1 | 990 |
| 1981-12-20 08:00 | -11.0°S, 168.2°E | Category 1 Tropical Cyclone | 24.7 | 987 |
| 1981-12-20 20:00 | -12.2°S, 167.4°E | Category 2 Tropical Cyclone | 30.4 | 980 |
| 1981-12-21 08:00 | -13.3°S, 166.5°E | Category 3 tropical cyclone | 36 | 970 |
| 1981-12-21 20:00 | -14.7°S, 164.3°E | Category 3 tropical cyclone | 38.6 | 965 |
| 1981-12-22 08:00 | -17.5°S, 162.1°E | Category 3 tropical cyclone | 44.2 | 955 |
| 1981-12-22 20:00 | -18.3°S, 162.0°E | Category 4 tropical cyclone | 49.9 | 940 |
| 1981-12-23 08:00 | -18.9°S, 162.3°E | Category 4 tropical cyclone | 55.6 | 925 |
| 1981-12-23 20:00 | -20.2°S, 163.5°E | Category 3 tropical cyclone | 44.2 | 955 |
| 1981-12-24 08:00 | -21.3°S, 165.2°E | Category 3 tropical cyclone | 36 | 970 |
| 1981-12-24 20:00 | -21.7°S, 165.9°E | Category 2 Tropical Cyclone | 30.4 | 980 |
| 1981-12-25 08:00 | -22.2°S, 166.8°E | Category 1 Tropical Cyclone | 24.7 | 987 |
| 1981-12-25 20:00 | -22.6°S, 166.5°E | Category 1 Tropical Cyclone | 19.5 | 995 |
| 1981-12-26 08:00 | -22.9°S, 165.8°E | Tropical Depression | 16.5 | 997 |
| 1981-12-26 20:00 | -23.0°S, 164.9°E | Tropical Depression | 16.5 | 997 |
| 1981-12-27 08:00 | -23.4°S, 163.8°E | Tropical Depression | 16.5 | 997 |
| 1981-12-27 20:00 | -25.0°S, 163.0°E | Tropical Depression | 16.5 | 997 |
| 1981-12-28 08:00 | -29.0°S, 162.9°E | Tropical Depression | 16.5 | 997 |
| 1981-12-28 20:00 | -34.0°S, 163.3°E | Tropical Depression | 16.5 | 997 |
| 1981-12-29 08:00 | -38.0°S, 165.0°E | Tropical Depression | 16.5 | 997 |
| 1981-12-29 20:00 | -41.0°S, 166.3°E | Tropical Depression | 16.5 | 997 |
Data sources: NOAA National Centers for Environmental Information IBTrACS v04r01 (Knapp et al., 2010), code 1981353S09172 / SH061982. There is no official Chinese name for this basin; the original English name is displayed. Intensity categories follow the local agency's classification for the region (converted from 1-minute sustained winds using WMO coefficients) and are for reference only. Data notes · Incorrect translation?
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