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Melting ice may change shape of Arctic river deltas

Thu, 07/25/2019 - 9:00am

Thawing ice cover and easily erodible permafrost may destabilize Arctic river deltas, according to new research. A new study in the AGU journal Geophysical Research Letters finds sea ice and permafrost both act to stabilize channels on Arctic river deltas.

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Sol 2476: The Southern Escarpment Almost Within Reach

Wed, 07/24/2019 - 8:00pm

This morning Curiosity found herself parked at the base of the southern escarpment of the Visionarium. She's at a significant tilt of 21 degrees; you can see the slope of the horizon in the attached image.

The post Sol 2476: The Southern Escarpment Almost Within Reach appeared first on AGU Blogosphere.

Shuicheng County: a very large, fatal landslide in Guizhou Province, China

Wed, 07/24/2019 - 4:52pm

A large landslide occurred in Shuicheng County, in Liupanshui City, Guizhou Province in China on Tuesday 22nd July 2019, killing up to 45 people

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The latest adventures from the R/V Falkor

Wed, 07/24/2019 - 12:02pm

Seven of the latest posts from the ongoing research cruises.

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Scientists take high-speed video of waves to better understand sea spray

Wed, 07/24/2019 - 10:00am

Waves crashing on seashores generate tiny droplets of water known as sea spray. Sea spray moves heat and water from the ocean to the atmosphere, but scientists are unsure which part of the wave-breaking process generates the most spray, whether it be wind shear, splashing, or the popping of air bubbles at the surface of the wave. To address this question, scientists generated breaking waves experimentally in a lab. They used a wave tank about the size of an average bowling lane to create miniature versions of plunging breakers, where the wave crest curls over itself and plunges downward.

The post Scientists take high-speed video of waves to better understand sea spray appeared first on AGU Blogosphere.

Sol 2475: Powering Through!

Tue, 07/23/2019 - 8:00pm

It's winter for Curiosity, and it's cold. That means that we have to spend extra energy heating up the instruments and motors for our activities. All of our energy comes from batteries, charged by the RTG. The RTG gives us more power than solar panels would, but in the winter, we are still limited by the amount of power it can generate.

The post Sol 2475: Powering Through! appeared first on AGU Blogosphere.

Sol 2474: A Great Outcrop!

Tue, 07/23/2019 - 8:00pm

When we see outcrops like this one that show a vertical exposure of laminated rocks, we capture it in high resolution Mastcam images so that scientists can look for sedimentary structures that give us clues as to how the rock formed.

The post Sol 2474: A Great Outcrop! appeared first on AGU Blogosphere.

Add common names to your manuscript and talk titles

Mon, 07/22/2019 - 12:51pm

I'm walking down a row of posters at a meeting of ecologists and a see the title, Non-target effects of an organochlorine pesticide on Mentior tacomii in aquatic settings. I think, "Neat!" I studied the effects of pesticides on amphibians and reptiles as a researcher so I'm always up for learning about contamination in other systems. The problem is that I have no freaking clue what M. tacomii is. And I'm not alone.

The post Add common names to your manuscript and talk titles appeared first on AGU Blogosphere.

Sol 2472-2473: Additional Contact Science and a Soliday at Sandside Harbour

Mon, 07/22/2019 - 12:00pm

Curiosity is still parked in front of an outcrop known as 'Sandside Harbour' in order to investigate differences in the lighter and darker outcrop expressions.

The post Sol 2472-2473: Additional Contact Science and a Soliday at Sandside Harbour appeared first on AGU Blogosphere.

Dragons of summer now on the hunt

Mon, 07/22/2019 - 11:29am

Worldwide, there are about 3,000 species of dragonfly. Thirty types live in Alaska. The largest in the state is the lake darner, a cool blue dragonfly that turns dark when the air is chilly.

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A First Geophysics Job with Project Apollo

Mon, 07/22/2019 - 10:34am

In 1972, after my freshman year at MIT, Prof. Nafi Toksoz was kind enough to hire me to work in his research group that used data from seismometers the Apollo astronauts installed on the moon. I learned a lot from these excellent scientists, and (hopefully) helped them a little. It was exciting to have even a very minor part in a group investigating the moon’s structure and evolution.  I figure …

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Convergence: A Call for More Robust Global Science Collaboration

Mon, 07/22/2019 - 10:21am

At AGU, we often say that science has no borders and takes no political sides. Science has the powerful ability to make profound impacts on nations, economies, and local communities. However, a tide of nationalism across the globe — manifested in the form of incendiary social media posts, trade wars, reactionary protectionism, and even overt violence — is on the rise. And often hand-in-hand with nationalism comes scientific disinformation campaigns …

The post Convergence: A Call for More Robust Global Science Collaboration appeared first on AGU Blogosphere.

Monday Geology Picture: Dinosaur Stampede Trackways

Mon, 07/22/2019 - 8:48am

This week I’m sharing a few pictures of an incredible display at the Queensland Museum of a dinosaur stampede – the only known record of a dinosaur stampede. The display shows an area in Queensland, Australia, where there are thousands of dinosaur footprints (more than 3,000) of more than 130 different dinosaurs, all in an area about the size of a tennis court! Recently, there has been some debate about …

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50 Years Ago Today

Sat, 07/20/2019 - 1:57am

Where was I at 30 seconds past 4:17 PM EDT 50 years ago today? When the Eagle landed on the Moon I was in a car north of Tulsa in Oklahoma with my Great Grandmother. Annie Higgins was an amazing woman who as a girl walked to Indian Territory (now Oklahoma) behind a covered wagon. She remembered reading in the paper of the Wright Bros. flight. She watched the news-reels …

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Friday fold: Banded iron formation from the University of Wisconsin geology museum

Fri, 07/19/2019 - 5:18am

A final Friday fold from Madison, Wisconsin: this one a slab of cut and polished banded iron formation from Australia: What exquisitely beautiful rock! Happy Friday!

The post Friday fold: Banded iron formation from the University of Wisconsin geology museum appeared first on AGU Blogosphere.

Chamoson: a dramatic debris flow video from last year in Switzerland

Fri, 07/19/2019 - 2:42am

Today I stumbled across a dramatic debris flow video, shot in Grugnay in Chamoson, Switzerland in August 2018, which illustrates the mobility of such events

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Sol 2470-2471: A Way to Spend a Sol at Solway

Thu, 07/18/2019 - 8:00pm

Today, Curiosity finds itself parked in front of a fascinating area of martian bedrock with clearly lighter and darker colored areas next to each other as seen in this Navcam image.

The post Sol 2470-2471: A Way to Spend a Sol at Solway appeared first on AGU Blogosphere.

Mendenhall Glacier, Alaska Accumulation Zone Shrinks

Wed, 07/17/2019 - 7:47am

Mendenhall Glacier in Landsat images from 1984 and 2018.  Yellow arrows indicates 1984 terminus location, read arrow the Suicide Basin tributary and the purple dots the snowline. Mendenhall Glacier is the most visited and photographed terminus in the Juneau Icefield region. The glacier can be seen from the suburbs of Juneau.  Its ongoing retreat from the Visitor Center and the expansion of the lake it fills is well chronicled.  Here …

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The start of the 2019 South Asia monsoon

Wed, 07/17/2019 - 2:23am

The 2019 summer monsoon in South Asia has now fully developed. Heavy rainfall has generated multiple landslides in India, Nepal, Bhutan and Bangladesh

The post The start of the 2019 South Asia monsoon appeared first on AGU Blogosphere.

Sols: 2468-2469: Rolling Southward!

Tue, 07/16/2019 - 8:00pm

Curiosity finished up our investigation at Harlaw Rise on the weekend, and commenced our drive to an area we are (informally) calling the 'Southern Outcrop,' another of the ridge features that are so prominent in this part of Glen Torridon.

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