From the 1st, the Japan Meteorological Agency will announce "sea ice information" that conveys the situation of drift ice spreading in the sea of Hokkaido in winter based on more detailed forecast results.
On the other hand, due to the revision of the observation system, some information such as "Drift ice all day", which was the last confirmation of drift ice, will not be announced.
The Japan Meteorological Agency has been visually observing drift ice since 1946 and has been providing information such as the "first day of drift ice" that can be confirmed with the naked eye, as well as announcing the position and future movement of drift ice as "sea ice information". , Calling attention to vessels navigating in the vicinity.
As the operation of a new monitoring / prediction system utilizing the latest meteorological satellite data and supercomputers begins on the 1st, "sea ice information" will also be renewed.
Specifically, the resolution of the forecast map of drift ice conditions and spread will be improved by 39 times, and it will be possible to magnify and check in detail.
Forecast intervals and periods will also change, with daily information released every 6 hours and up to 10 days in advance.
On the other hand, some information such as "Drift ice" when the drift ice leaves the coast and "Drift ice all day" which is the last day when the drift ice can be seen from the coast will not be announced in the future. increase.
The staff will continue to visually observe and announce the "first day of drift ice" and "first day of drift ice berthing".
The Japan Meteorological Agency said, "The accuracy of satellite data will improve, and visual observation will be stopped after drift ice berth, but since the staff will continue to analyze and predict, there will be no impact on regional disaster prevention and climate change data. It is. "