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Tuesday, August 30, 2022

Sea level rise - new study concludes at least 10 inch rise from Greenland melting

 A new study of Greenland's rapidly melting ice sheets concludes, using a conservative model, that oceans will rise at least 10 inches over the coming years/decades. While no timeline was given, this melting will occur regardless of what humans do to curb greenhouse gas emissions. The reason is that the melting cycle has already been put into motion, and the combination of warming ocean temps, water from melted ice (that then melts more ice...sort of like pouring liquid water on ice cubes in a sink will melt the ice), and the fact that warming water expands in volume, means this rise is inevitable. Also, using sophisticated radar techniques, dozens of lakes below the surface ice have been discovered - this means there is melting happening underneath the ice that we had not observed before. Often some computer models were underestimating the rate of melting, and as further research is done more mechanisms for melting are being discovered to help us understand why the rates are quickening.

What's significant about Greenland's ice sheets is that they are land-based. They are not icebergs already in the water. If an iceberg melts, there won't be any rise. However, run-off water from land is new water in the ocean, and makes sea levels rise. 



Tuesday, August 23, 2022

Atoms and how we can literally take images of them

 This is a video showing some of the microscopes and techniques used to get images of INDIVIDUAL ATOMS!! Incredibly cool!!!



Sunday, August 21, 2022

Status of rivers around the world - drying up in northern hemisphere

 The world's rivers have had a very hard and bad summer around the world. Many are becoming impassable for shipping because they are so low, and also these are water sources for tens to hundreds of millions of people. It is clear they are drying up from so many droughts that have been in progress, especially in the northern hemisphere where most of the land-mass of the earth is located. And those droughts have been accelerated and made worse through human-induced climate change. Check out this link where you can see satellite photos of 6 major rivers in the past compared to today

This photo is from 2019 in India - the Narmada River in the Narsinghpur Province. There's little left for this and many more farmers along that river.