Junger Mond mit Erdschein

Bei jungem bzw. altem Mond ist der Erdschein in der Dämmerung besonders schön zu sehen. Die beiden Fotos entstanden am 26.11. um 17:03 MEZ bzw. am 27.11. um 16:54 MEZ.

Das Rückstrahlvermögen der Erde für Sonnenlicht (die Albedo), bestimmt wie hell der Erdschein zu sehen ist. Dazu ist eine interessante neue Arbeit erschienen: https://agupubs.onlinelibrary.…/doi/10.1029/2021GL094888 (mit Pressemitteilung hier: https://news.agu.org/press-rel…ng-due-to-climate-change/). Die Erde reflektierte in den letzten 20 Jahren weniger Sonnenlicht wieder ins All, da es weniger helle Wolken über den wärmeren Meeren gab.

Mond mit Erdschein, 26.Nov.2022, 17:03 MEZ.

Canon 77D, f=200mm 1:5, 2 Sekunden belichtet

Mond mit Erdschein, 27.Nov.2022, 16:54 MEZ.

Canon 77D, f=300mm 1:5,6, 0,8 Sekunden belichtet

CS, Wolfgang

Hallo Gerrit,

ja das ist die Schlußfolgerung aus der Arbeit: "Two things affect the net sunlight reaching the Earth: the Sun’s brightness and the planet’s reflectivity. The changes in Earth’s albedo observed by the researchers did not correlate with periodic changes in the Sun’s brightness, so that means changes in Earth’s reflectiveness are caused by something on the Earth.

Specifically, there has been a reduction of bright, reflective low-lying clouds over the eastern Pacific Ocean in the most recent years, according to satellite measurements made as part of NASA’s Clouds and the Earth’s Radiant Energy System (CERES) project.

That’s the same area, off the west coasts of North and South America, where increases in sea surface temperatures have been recorded because of the reversal of a climatic condition called the Pacific Decadal Oscillation, with likely connections to global climate change." (zitiert aus der Pressemitteilung)

Und weiter: "The dimming of the Earth can also be seen in terms of how much more solar energy is being captured by Earth’s climate system. Once this significant additional solar energy is in Earth’s atmosphere and oceans, it may contribute to global warming, as the extra sunlight is of the same magnitude as the total anthropogenic climate forcing over the last two decades.

“It’s actually quite concerning,” said Edward Schwieterman, a planetary scientist at the University of California at Riverside who was not involved in the new study. For some time, many scientists had hoped that a warmer Earth might lead to more clouds and higher albedo, which would then help to moderate warming and balance the climate system, he said. “But this shows the opposite is true.”

Viele Grüße, Wolfgang