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11/25/2020 1:47 PM Weather news
Along with this, visual observations such as the first snowfall by the staff of the Meteorological Agency will be carried out from today November 25 (Wednesday) in the new government building of Toranomon.
Toranomon is also a historical place where meteorological observations began in Tokyo, and it is a relocation that can be called a return to origin for the first time in 138 years.
After that, the viewing sites were ② in 1882 (Kojimachi-ku Daikancho, near the Kitabashimon Imperial Palace), ③ in 1923 (Kojimachi-ku Motoe-cho, now Chiyoda-ku Otemachi), and in 1964 ④ (premises of the Otemachi government building)) And they move in order.
However, an ingenuity was made to maintain continuity with the values observed on the north side of the Imperial Palace, which had continued for over 100 years, and a new dew field will not be established in Toranomon, but will instead be moved to the Park Kitamaru (Chiyoda Neighborhood) in ⑤. Was.
In 2007, the wind direction, wind speed, total solar radiation, and sunlight time were moved to the roof of the Museum of Science and Technology in Kitamaru Park. In 2014, the relocation of precipitation, temperature, vapor pressure, dew point temperature, relative humidity, snow (snowfall / snowfall), and pressure to the new Kitamaru Park dew field was completed.
Before relocation in 2014, a three-year verification was conducted, the difference in temperature and snow depth between the two positions was analyzed, and the handling of average values, extreme values, and rankings was examined. The minimum temperature and the average temperature of the open field of Kitamaru Park are known to be lower than those of the open field of Otemachi, and the depth of snow tends to be greater.
On the other hand, since the observer visually observes atmospheric phenomena, etc. At the main government building, the observation location will change from the old Otemachi government building to the Toranomon government building. Specifically, observations such as first snow, first ice, and first frost are applicable.
Since the first snow, the first ice and the first frost have not been observed in the Otemachi government building so far this season, they will be observed for the first time in the new government building in the future.
The new Toranomon government building, which is close to the Kasumigaseki government office district. It is about 2.9 km in a straight line from the Otemachi government building. It is likely that this year there will be a slightly more special first snow than usual.
