放射冷却・・・人も植物も寒さ対策を充分に

　年間で最も寒い季節となり、特に明日から大寒です。一方、立春は２週間後ですから春はすぐそこまで来ています。自然界はそれを示すかの如く、柑橘類の実は黄色くなって食べ頃であり、日本シャクナゲは日に日に蕾が大きくなりつつあります。

　シャクナゲはあまりの低温に葉が幾分か垂れ下がってます。日の出直前に気温が最も下がります。特に晴れてる夜間には放射冷却が起こります。

　私たち人間も季節の変わり目は体調を崩しやすいので、人混みを避けるなどコロナ対策はもちろん、寒さ対策、血圧対策を施し、最も寒い今の季節を乗り越え、お互いに健康を維持しましょう。

 It has become the coldest season in a year, especially from tomorrow. On the other hand, the beginning of spring will come two weeks later, so spring is just around the corner. As if the natural world shows in the photos, citrus fruit turns yellow and are ready to eat, and Japanese rhododendron buds are getting bigger day by day.

 The leaves of rhododendron hang down due to excessively low temperature. The radiation cool tends to happen when it fine during night time. Therefore the temperature drops the most just before sunrise.

 We humans are also apt to get sick at the change of the season, so let's take measures against Covid19 by avoiding crowds as well as measures against cold and hypertension. We should overcome the coldest season and maintain good health each other.

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