Earth Systems Science

Sugar pines are the tallest pine species in the world, and they only grow along the West Coast of North America. They are a valued source of timber with cones as large as an adult’s forearm. But they face several problems that a new paper argues should be quickly addressed.

The sugar pine population has been declining because of changing fire patterns, drought, bark beetle mortality, a disease called white pine blister rust – and now the impacts of climate change.

A group of researchers at UC Merced has found that climate change means it takes about three months longer for California to recover from drought, and probably longer.

“Climate change has fundamentally changed the odds of getting out of drought. It has weighted the dice,” said Emily Williams, a postdoctoral scholar with the Sierra Nevada Research Institute. “This is happening because of warming in summer months, and a good portion of it is because of human-caused climate change.”

A new study co-authored by UC Merced researchers assesses the effect of a warming climate in pushing the elevation of snow to rain higher during a storm, increasing runoff and the risk of flooding.

Rocks, from ponderous boulders to tiny grains of sand, are subject to the whims of moisture, weather and time as they tumble from surrounding slopes into rivers, pools and lakes.

How different species of animals respond to extreme weather events — which are increasing because of climate change — appears to be related to body size and habitat preference, a new study shows.

When extreme weather causes widespread flooding, smaller species and those living in low-elevation areas are most at risk. Being able to develop models that forecast the effects of natural disaster on terrestrial animals could help guide efforts to protect vulnerable species and habitats.

Professor Martha Conklin started her career at UC Merced at the Castle Research Facility, and it began with a frightening surprise.

“I had a baby rattlesnake in my office,” she said. “The whole building was snake-infested before UC Merced moved in. But it's a small thing — there were a lot of things to work out back then.”

Being able to accurately predict how the climate will change in the future is one of the most important quests of our lifetimes. A key to better prediction is the fundamental understanding of how particles in the atmosphere are connected to climate and climate change. One way to do that is to better understand the interactions between desert dust particles and radiation — from the sun and the Earth's surface.

Incoming Bobcat Benji Thier already knows what he wants to do with his college degree: Save the planet.

“I am planning to study Environmental Systems Science because I did some environmental work in high school and I think it is a very important and relevant field,” he said. “I believe we need more people in this field because we need to save our planet.”

Thier, a Tiburon native and graduate of Redwood High School, visited the campus on Bobcat Day and was impressed with how much environmentally related research is being conducted.

Megalodon was the biggest shark in the world — 50 feet long or more — and one of the largest fish ever to exist. It roamed most of the world’s oceans from 23 million to 3.6 million years ago.

A new study by paleoecology Professor Sora Kim and colleagues shows the shark’s body temperature was considerably higher than previously thought and provides clues to the species’ demise.

UC Merced continues to be recognized nationally, with some programs leaping forward, according to U.S. News & World Report’s 2023-2024 edition of Best Graduate Schools released on April 25.