なぜサハラ砂漠が緑地だったと言い切れるのか？ 【ゆっくり科学】

This time, we explained the time when the Sahara Desert was once lush and green. Although the Sahara region is now the world's largest desert, it is known that until approximately 5,000 years ago, it was a land rich in water. It is thought that the main reasons for this are that the Sahara was once warmer than it is today due to changes in the Earth's axis of rotation and the shape of its orbit, causing moist winds to blow from the sea to the land. In this article, we hope to explain: Evidence that the Sahara was once green Why the Sahara became a desert The advantages and disadvantages of desert greening Why deserts support the Earth's ecosystems ●Related Videos Video on Plant Communication    • 植物が音楽鑑賞や会話をするという俗説は正しいのか？【ゆっくり科学】   ●Playlist ・10 Recommended Videos    • おすすめ動画10選   ・Biological Evolution    • 生物の進化   ・Past Commentaries (Newest First)    • ゆっくり科学解説（新しい順）   ●Membership This membership is for those who simply want to support our activities. The basic concept of this channel is to provide access to scientific knowledge for "anyone" and "free of charge," so we generally have no plans to create videos that are exclusive to members. m(_ _)m Any money received will be used carefully as funding for our activities. ↓Register for membership here    / @delta_yukkuri   ●References https://www.nature.com/articles/natur... https://www.sciencedirect.com/science... https://www.semanticscholar.org/paper... https://www.sciencedirect. com/science/article/abs/pii/S0140196308001067 https://www.pnas.org/doi/10.1073/pnas... https://www.sciencedirect.com/science... https://journals.plos.org/plosone/art... https://link.springer.com/article/10.... https://www.frontiersin.org/articles/... ●Table of Contents 00:00 Introduction 01:06 Evidence that it was once green ① 02:30 Evidence that it was once green 04:27 Why did it become a desert? 07:28 Rising temperatures and increased precipitation 08:59 Problems with current greening methods 13:33 Greening Case Study ① 14:55 Greening Case Study ② 17:11 Greening can be risky ●BGM ・[Touhou] Tomboy Love Girl [Homemade Arrangement] ・Honobono Waltz [Recorder] ・Pastel House Niconico Commons https://commons.nicovideo.jp/ #SaharaDesert #YukkuriCommentary #DeltaYukkuriScience