Earths

How the Current Southwestern North America Megadrought Is Affecting Earth's Upper Atmosphere

How the Current Southwestern North America Megadrought Is Affecting Earth’s Upper Atmosphere

Credit: Kirtland Air Force Base New research, based on two decades of data, shows that in the ten years since its onset in 2000, the Southwestern North America (SWNA) megadrought caused a 30 % of gravity wave activity in Earth’s upper atmosphere. More than 30 years ago, Chester Gardner of the Department of Electrical and …

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Where does Earth's oxygen come from?  A new study hints at an unexpected source

Where does Earth’s oxygen come from? A new study hints at an unexpected source

The amount of oxygen in Earth’s atmosphere makes it a habitable planet. Twenty-one percent of the atmosphere is made up of this life-giving element. But in the distant past – as far back as the Neoarchean era 2.8 to 2.5 billion years ago – this oxygen was almost absent. So how did the Earth’s atmosphere …

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Earth's oxygen comes from a surprisingly deep and warm source, study finds

Earth’s oxygen comes from a surprisingly deep and warm source, study finds

The amount of oxygen in Earth’s atmosphere makes it a habitable planet. Twenty-one percent of the atmosphere is made up of this life-giving element. But in the distant past – as early as the Neoarchean era 2.8-2.5 billion years ago – this oxygen was almost absent. So how did the Earth’s atmosphere get oxygenated? Our …

Earth’s oxygen comes from a surprisingly deep and warm source, study finds Read More »