Menopausal Mother Nature

News about Climate Change and our Planet

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Switching up: Marine bacteria shift between lifestyles to get the best resources

Researchers have found that marine bacteria exploit resource patches efficiently by switching between attached and planktonic lifestyles, and fine-tuning the time spent on patches depending on their quality. Bacteria stayed longer on higher-quality patches, as predicted by patch use theory. Future studies in this area could help to predict the role of marine bacteria in the global carbon cycle.

Island-building in Southeast Asia created Earth’s northern ice sheets

Tectonic processes are thought to have triggered past ice ages, but how? A new analysis of mountain building in the maritime tropics of Southeast Asia attributes the last ice age, which reached a maximum 15,000 years ago, to increasing rock weathering in the rising island arc from Sumatra to New Guinea over the past 15 million years, with the first ice sheets in the Northern Hemisphere appearing about 3 million years ago.

‘A crazy year up north’: Arctic sea ice shrinks to 2nd-lowest level on record – USA TODAY

Sea ice is frozen ocean water that melts each summer, then refreezes each winter. “The year 2020 will stand as an exclamation point on the downward trend in Arctic sea ice extent.” Shrinking sea ice is just one of many…

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Mercury concentrations in Yukon river fish could surpass EPA criterion by 2050

The concentration of mercury in the fish in Alaska’s Yukon River may exceed the EPA’s human health criterion by 2050 if greenhouse gas emissions that cause global warming are not constrained, according to new research.

Earth’s glaciers and ice sheets are melting

Several new studies released in recent weeks paint a dire picture of the ongoing melting of Earth’s freshwater ice sheets and glaciers, 99% of which are found in Greenland and Antarctica.