Taxonomy term

geology

Gulf Stream eddies transport iron to North Atlantic subtropical gyre

Dust from the Sahara Desert is a major supplier of iron to the North Atlantic subtropical gyre — the huge circular ocean current stretching between North America and the west coasts of Africa and Europe — where cyanobacteria use the scarce nutrient to fuel nitrogen fixation, which then fertilizes other organisms at the base of the marine food chain. Now, researchers have discovered that eddies spinning off the Gulf Stream also transport iron to the northwestern edge of the gyre.

22 Nov 2018

Winter precipitation in southwestern U.S. tied to Kiwi Coast

Water supplies in the southwestern United States largely depend on winter precipitation. Predicting seasonal rain and snowfall is becoming more difficult, however, as climate change causes precipitation patterns to vary. A new study provides evidence of a strong correlation between late-summer to fall sea-surface temperatures off the coast of New Zealand and winter precipitation in the southwestern U.S. — a correlation that could help provide earlier and more reliable forecasts for the southwestern U.S., and improve water resource and ecosystem management in the region.

21 Nov 2018

Benchmarks: November 16, 1990: Florida Keys National Marine Sanctuary is established

Off the tip of the Florida Peninsula lies the world’s third-largest living coral reef, the Great Florida Reef. The only barrier reef system in North America, it is composed of a system of individual reefs that together extend 270 kilometers south of Miami through the Florida Keys, a crescent-shaped chain of more than 1,500 islands, about 30 of which are inhabited. This ecological treasure is home to more than 6,000 species of marine life, including colorful fish and endangered sea turtles, as well as extensive seagrass beds, mangrove islands and about 1,000 shipwrecks.

16 Nov 2018

Japanese diaries show sun's cycle sparks lightning on Earth

The effects of solar cycles on Earth’s climate over timeframes of thousands of years are well documented, but the shorter-term effects on weather are less understood. A new study using ancient Japanese diaries to track storms in the 18th and 19th centuries suggests that one of the sun’s shortest cycles — the 27-day rotational period — may play a role in stimulating lightning on Earth.

15 Nov 2018

Travels in Geology: Jewel of the Apennines: Italy's Monti Sibillini National Park

The landscape of the central Apennines is a manifestation of the geological processes that have acted on this region for more than 200 million years. It is a place where human history is closely tied to the terrain: a relationship that has produced terrific rewards of agriculture and art, as well as great catastrophes from earthquakes and landslides. 
14 Nov 2018

Getting There & Getting Getting Around Monti Sibillini National Park

For those traveling internationally by air to Italy to visit Monti Sibillini National Park, flying into Rome’s Leonardo da Vinci–Fiumicino Airport (FCO) is likely the best option. Florence is another option, but Rome is closer and hosts more flights. There are several routes into the park from different directions; all the entrance points on the western side of the park are a two-and-a-half- to three-hour drive east of Rome. Bus tour services run out of Rome, but the best way to reach the park is via rental car. Rental cars are plentiful, and the good news is that, unlike driving in some parts of Italy such as around Naples or in Sicily (which is not for the faint of heart), driving in the Apennines is much more like driving in the U.S. In this part of Italy, drivers are more courteous and generally adhere to road signage and lane guidelines. All countries have driving norms that are not immediately clear to foreign drivers, however. In Italy, to avoid scorn from your fellow drivers, it’s important to remember to never pass another car on the right. Italians consider it a severe breach of driving etiquette.

14 Nov 2018

Turning modern "eyes" on ancient sites

People have inhabited Jerash, Jordan, since the Neolithic. But much of its history has been buried by subsequent occupation, including over the last two centuries. Archaeologists have excavated Jerash with trowels and screens to uncover its long history, but now, with the help of lidar and old photographs, a team of researchers is discovering more about Jerash’s past by gazing down on the city from the sky.

13 Nov 2018

Down to Earth With: Geologist Robert Brinkmann

As a child, Robert Brinkmann was always curious about rocks. He wondered how they got where they were and why they were different from each other. Brinkmann grew up in the farm country of southeastern Wisconsin, as well as in the woods in the northern part of the state. After one of his first geology classes in college, he went home and finally understood what he was looking at. “It was such an eye-opening experience to be able to read the landscape,” Brinkmann says.

09 Nov 2018

Algae ate themselves to death and caused a global extinction

Errant asteroids and toxic emissions from volcanic eruptions are the usual suspects in mass extinctions. But during the Ordovician, it was a million-year stretch of cooling ushered in by proliferating algae that triggered a worldwide glaciation and extinction event, according to a new study.

08 Nov 2018

Comment: Making social media work for scientists

Social media platforms offer scientists simple and inexpensive ways to communicate with the public. Here’s how to start sharing your science online.

07 Nov 2018

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