Scientists estimate sunlight in 18th and 19th century Tokyo using historical diaries

PHYSorg
May 14, 2026, 5:08 pm124 ptsTrending
The amount of sunlight, or solar radiation, that a location receives makes a big impact on weather conditions, crop success, rainfall and overall climate trends. Today, instruments called pyrheliometers are used to carefully calculate how much sunlight occurs at a particular location, but these instruments…

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