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“#Texas cave sediment upends meteorite explanation for global cooling” Archaeologic excavations at Hall’s Cave exposed sediments for geochemical analysis that span from circa 20,000 to 6,000 years. Credit: Michael Waters, Texas A&M University Texas researchers from the University of Houston, Baylor University and Texas A&M University have discovered evidence for why the earth cooled dramatically…
“#Short wind turns with strong cooling effect” Map of the eastern, tropical North Atlantic with the route of the Meteor from 13 to 15 September 2015 (black line). The sea surface temperatures of 14 September 2015 are shown in color, the arrows indicate the direction and strength of the wind at that time. The turbulence…
“#John Tyndall: the forgotten co-discoverer of climate science” The greenhouse effect. Credit: US EPA It is surprising that the Irish scientist John Tyndall, born 200 years ago on August 2 1820, is not better known. This is despite the existence of the Tyndall Centre for Climate Change Research, the Tyndall National Institute and the Pic…
“#North Atlantic climate far more predictable following major scientific breakthrough” Credit: Pixabay/CC0 Public Domain A team of scientists led by UK Met Office has achieved a scientific breakthrough allowing the longer-term prediction of North Atlantic pressure patterns, the key driving force behind winter weather in Europe and eastern North America. CMCC scientists Panos Athanasiadis, Alessio…
“#New method lets scientists peer deeper into ocean” Senior Research Scientist Barney Balch collects ocean optics data during a research cruise in the Gulf of Maine. Balch is part of a team of researchers that has established a new approach to detect algae and measure key ocean properties using light, based on their research in…
“#How Juneau, Alaska responds to yearly glacier floods” Every year, residents who live near the banks of the Mendenhall River in Juneau, Alaska know that sometime in summer, their streets will flood. At some point, even in the absence of recent rain, the river will rise and overflow through the roads and into houses. All…
“#New current that transports water to major ‘waterfall’ discovered in deep ocean” The high-seas ferry MS Norröna, cited in the Nature Communications paper, measures upper ocean currents with an ADCP (acoustic Doppler current profiler) installed in its hull as it makes a weekly roundtrip between Denmark, the Faroe Islands and Iceland. Credit: Erik Christensen –…
“#Alaskan seismometers record the northern lights” Aurora near Poker Flats, Alaska. Credit: Aaron Lojewski, Fairbanks Aurora Tours Aaron Lojewski, who leads aurora sightseeing tours in Alaska, was lucky enough to photograph a “eruption” of brilliant pink light in the night skies one night in February. The same perturbations of the Earth’s magnetic field that lit…
“#How stony-iron meteorites form” Using the SAPHiR instrument at the Research Neutron Source Heinz Maier-Leibnitz (FRM II) at the Technical University of Munich (TUM), a scientific team has for the first time simulated the formation of a class of stony-iron meteorites, so-called pallasites, on a purely experimental basis. The pictures showes a slice of a…
“#A plunge in incoming sunlight may have triggered ‘Snowball Earths’” Credit: CC0 Public Domain At least twice in Earth’s history, nearly the entire planet was encased in a sheet of snow and ice. These dramatic “Snowball Earth” events occurred in quick succession, somewhere around 700 million years ago, and evidence suggests that the consecutive global…