The Limit of Heat

(One of the twenty-four solar terms)

The Limit of Heat is the fourteenth of the twenty-four solar terms and the second in autumn
The Limit of Heat, it has reached the “last heat” of the “Three Heats” of the high temperature weather. After The Limit of Heat solar term, the thunderstorm activity is not as active as that in the hot summer, and the general trend of heavy rain in various places is weakened. There are many folk activities in the summer, such as eating ducks, putting lanterns on the river, holding fishing festivals, decocting herbal tea, and worshipping the earth.
To end the summer heat, that is, “exiting the summer heat”, means leaving from the heat. The “dog days” involve the four solar terms of minor heat, great heat, beginning of autumn, and end of summer heat. At this time, the dog days have passed or are coming to an end, and the heat of early autumn will end. The arrival of the summer heat also means entering the second half of the Shen month of the Ganzhi calendar. The end of summer heat is one of the twenty-four solar terms that reflects climate change. When it is summer, the direct sunlight continues to move southward, the solar radiation weakens, the subtropical high also retreats to the south, and the summer heat gradually disappears. After the end of the summer solar term, the trend of temperature gradually decreasing is further obvious.
The twenty-four solar terms have “three heats”, namely, the minor heat, the great heat, and the end of the summer, which are the first heat, the middle heat, and the last heat, respectively. There is also a solar term “Liqiu” in the middle of the “Three Summers”. Long summer days are good for crop growth and yield. The ancients called the period from the beginning of autumn to before the autumn equinox as “long summer”.
“Three summers” (mini-heat to the end of summer) and “three-fu” both represent extreme high temperature weather, and the curves on the time axis and temperature axis are basically the same: when the summer days come, the summer days arrive; when the summer days disappear, the summer heat will end. The Yuan Dynasty literati Wu Cheng’s book “The Seventy-two Hours of the Moon” said: “Di, it will stop, and the summer heat will end here.” It’s summer, mid-July. place, stop. The heat is over here.