Solar eclipse and Perseid meteor shower make a heavenly double bill - The Globe and Mail
How ESA studies the solar corona...
Does it cool us??
DeepSeek.ai:
Today's total solar eclipse for Western Europe is underway, with lesser effects for Montreal. Does such an event result in planetary cooling. It must have some effect on Earth's energy budget!?
A solar eclipse does cause a measurable, local dip in temperature and energy, but this effect is far too brief and localized to cause any significant planetary cooling. It's a temporary weather event, not a force that can alter the Earth's climate.
🌡️ A Measurable, Local Temperature Drop
When the Moon blocks the Sun's rays, the sudden reduction in solar radiation directly impacts the local weather. The effects are most pronounced over land where the surface cools quickly.
Surface Cooling: During totality, temperatures can drop significantly. For example, the April 2024 eclipse over North America caused a drop of up to 6°C (10.8°F) in some areas . This cooling is usually delayed, with the minimum temperature occurring about 15-20 minutes after totality.
Disruption of Normal Heating: This sudden drop in temperature can cause the ground to cool so much that it creates a "night-like" temperature inversion. This stops the normal daytime mixing of the atmosphere, reducing wind speeds and causing clouds to dissipate.
⚖️ The Planetary Energy Budget: Why the Global Effect is Negligible
While the local effect is real, its impact on Earth's total energy budget is minimal for a few key reasons:
Short Duration: The entire eclipse only lasts a few hours at most for any given location.
Tiny Shadow: The Moon's shadow, even the wide penumbra, covers only a small fraction of the Earth's surface at any given moment. One study from 1982 calculated that an eclipse can reduce the total solar energy reaching the Earth over a specific large area by about 1% for that day.
A Drop in the Ocean: A 2016 estimate suggests that even on a day with an eclipse, the total energy received by the entire planet is roughly 99% of a normal day.
🌍 Local vs. Global: The Key Difference
This event perfectly illustrates the difference between weather and climate.
Weather is the short-term state of the atmosphere. A solar eclipse is a dramatic weather event that temporarily alters local temperature, wind, and clouds—just like a passing storm system.
Climate is the long-term average of weather over decades and centuries. For a temporary event to influence the climate, it would need to persistently change Earth's energy balance.
While you might feel a noticeable chill in Montreal during the eclipse, the Earth's vast oceans and atmosphere simply have too much thermal mass to be cooled on a global scale. The sun's immense power, which warms our planet every day, easily overwhelms the brief interruption of an eclipse.
I hope this helps clarify the fascinating, but temporary, impact of a solar eclipse!
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