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adityarup chakravorty

Solar-powered paint could produce hydrogen for fuel

Split a water molecule, and you get hydrogen and oxygen. Burn that hydrogen as fuel and you get water. This straightforward, pollution-free cycle is part of what makes hydrogen so tantalizing as a potential renewable fuel. Unfortunately, splitting water molecules to generate hydrogen is not currently very energy efficient. In fact, more than 95 percent of hydrogen currently used in industry is produced from fossil fuels, not water.

05 Oct 2017

When schools shake: Keeping students and teachers safe during earthquakes

After seismic events strike schools, ensuring that people are safe and education is minimally disrupted are simple goals with complex solutions. Researchers and stakeholders are working together to navigate the maze of financial, social and technical challenges involved.
04 Sep 2017

Reconstructing ancient oxidant levels and their climatic effects

Oxidants in the troposphere, such as ozone and hydroxyl radicals, influence the life spans of other atmospheric components, including pollutants and greenhouse gases like carbon monoxide and methane. But how the abundance of tropospheric oxidants varies as climate changes is poorly understood. Part of the challenge is that these oxidants are too reactive to be preserved in paleo-records, such as ice cores.

29 Aug 2017

Did Jurassic tectonics lead to supergiant oilfields?

More than 6 percent of global oil production comes from a single oilfield: the supergiant Ghawar oilfield in eastern Saudi Arabia, which produces more than 5 million barrels of crude oil every day. In a new study in GSA Today exploring the origins of this vast oilfield, researchers have found that extensive tectonic plate movements during the Middle and Late Jurassic may have created the conditions necessary for the formation of the Ghawar and several other oilfields across the Middle East.

01 May 2017

Tropical rainfall shifts resulted in greener Sahara

Six thousand years ago, the Sahara — today the world’s largest nonpolar desert, stretching over an area larger than the contiguous United States — was dotted with lakes and vegetation. Rock paintings from that time depict a much wetter landscape, and show elephants, hippos, antelope and many other animals living in the region.

21 Apr 2017

Broadening ocean current could carry less heat poleward with climate change

Some ocean currents, like the Agulhas Current in the southwestern Indian Ocean, act like giant air conditioners, moderating Earth’s climate by shuttling heat from the equator toward the poles. The Agulhas is one of the largest and fastest currents in the world: Flowing southwest along the east coast of Africa, it stretches almost 1,500 kilometers and transports about 70 million cubic meters of water every second toward the South Pole at peak speeds upward of 7 kilometers per hour.

21 Feb 2017

Small floods can carve big canyons

Through the early 20th century, geologists argued over how the giant canyons of the Channeled Scablands in Eastern Washington were formed. Ultimately, a theory proposed by J Harlen Bretz in the 1920s — that the canyons were carved by catastrophic, short-lived outbursts of floodwaters unleashed when natural dams holding back glacial lakes collapsed — was shown to be correct. Controversy still exists, though, about the size of these ancient floods.
 

03 Feb 2017

Active Japanese volcano due for large eruption?

In January 1914, Japan’s most active volcano, Sakurajima, erupted violently, covering the nearby city of Kagoshima in a layer of ash. The lava flows from this event filled the strait between the mainland and the island volcano, transforming it into a peninsula.

04 Jan 2017

Small-scale factors influence mantle flow under the seafloor

In December 2011, scientists and technicians aboard the research vessel Marcus G. Langseth dropped several ocean-bottom seismometers into the deep Pacific more than 1,900 kilometers southeast of Hawaii to measure seismic activity and electrical conductivity to a depth of about 300 kilometers below the seafloor. Now, these measurements are providing new insights into how the mantle flows and deforms below the rigid tectonic plates that make up Earth’s surface.

22 Nov 2016

Bubble accumulation could explain massive volcanic sulfur releases

The spectacular 1815 eruption of Indonesia’s Mount Tambora spewed large amounts of sulfur gases into the atmosphere, which formed fine sulfur-rich particles that blocked sunlight and lowered global temperatures by more than half a degree Celsius, causing famine and death on a global scale.

23 Aug 2016

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