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Bright sun shining on Earth from space with orange arrows rising through a turquoise atmosphere, illustrating the greenhouse effect.

Bright sun shining on Earth from space with orange arrows rising through a turquoise atmosphere, illustrating the greenhouse effect.

Sonnenlicht dringt ein: Das kurzwellige Sonnenlicht durchdringt die Erdatmosphäre fast ungehindert und trifft auf die Erdoberfläche. Umwandlung in Wärme: Die Erde nimmt diese Energie auf und strahlt sie als langwellige Infrarotstrahlung (Wärmestrahlung) wieder zurück in Richtung Weltraum ab. Reflektion durch die Atmosphäre: Hier treten die Treibhausgase (wie CO2 und Methan) in Aktion. Sie lassen die Wärmestrahlung nicht einfach entweichen, sondern absorbieren sie und strahlen einen Großteil davon wieder zurück auf die Erde (Gegenstrahlung). Zweifache Erhitzung: Durch diese Rückstrahlung wird die Erde quasi ein zweites Mal erwärmt, was zu den lebensfreundlichen Temperaturen auf unserem Planeten führt – oder bei zu vielen Treibhausgasen zur globalen Erwärmung. Voir plus

#science#space#environment

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