[Weather Useful Information] Can satellite images reveal the strength of cold air above? What is "offshore distance"? Supervised by Sysmet Co., Ltd. meteorologist.

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The last weather-related information for 2024 will introduce a theme unique to winter.
As December has arrived, the temperature has dropped significantly. During this time, the phrase "cold air aloft" is often heard in weather forecasts.
The phenomena of cold air and clouds observed by the Himawari weather satellite from space can be viewed as images on the Japan Meteorological Agency's website.
In fact, those images contain indicators that suggest the strength of the cold air aloft, in addition to the movement and shape of the clouds. This is referred to as "offshore distance."
This time, I would like to introduce this "offshore distance."
Although it may sound like a difficult term that is not commonly heard, it can actually be easily checked.
Table of Contents
1. What is offshore distance?
2. Offshore distance and the strength of cold air aloft
3. Conclusion
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