It's hot! It's hot! It's hot!
The heat expressed by the Japan Meteorological Agency as a disaster strikes Tokyo.
Just two years later, the Tokyo Olympics will be held, but there is concern that marathons and 50km races, which will be long outdoor competitions, will be held in this heat.
Did you know that thermal insulation pavement is being promoted to mitigate the heat island phenomenon, which is one of the causes of heat in Tokyo?
What is heat shielding pavement?
On the homepage of Chuo-ku
"A thermal shielding pavement reduces heat storage in the pavement and suppresses the rise in road surface temperatures by reflecting near-infrared rays from sunlight. Compared to general asphalt pavement where the road surface temperature has risen to about 60 degrees, the road surface temperature of thermal insulation pavement has a reduction effect of about 10 degrees. As a result, in general asphalt pavement, heat stored in the pavement during the daytime was released at night, which was a factor for tropical nights, but thermal insulation pavement reduces heat storage during the daytime, so you can live comfortably at night. "
It's a coincidence.
In Chuo-ku, in order to make the inhabitants widely aware of the effects of heat-shielding pavement, two display boards that compare the surface temperature of the heat-shielding pavement and the general asphalt pavement in real time are installed.
One of them was installed on Yaesu Street as shown in the figure below.
Men's 50km race on land starts at 6:00 am and men's marathon starts early in the morning at 7:00 am, but marathons are more than 2 hours, men's 50km races Even the record is 3 hours, 32 minutes and 33 seconds, indicating that it will be more than 4 hours of competition.
Tokyo Dumbo recorded the temperature shown on the display board on Sunday, August 5 and observed the temperature change.
The result is the graph below, and after 11:00, the heat-insulating pavement exceeds 40°C.
It turns out that starting the competition early is effective, but even at 6:00 in the morning, the temperature is close to 30 ° C and the situation remains dangerous, so care for the operator is essential.
In addition, watchers and volunteers also need to be careful.
Please refer to the following for information on thermal insulation pavement in Chuo-ku.
http://www.city.chuo.lg.jp/kankyo/dorokyoryo/kannkyouniyasasiihosou.files/101.pdf
