“This is humanity as a geologic force,” Ken Caldeira tells the New York Times. “We’re not a subtle influence on the climate system – we are really hitting it with a hammer.”...
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Washington, DC—New work from an international team including Carnegie’s Ken Caldeira demonstrates that the planet’s remaining fossil fuel resources would be sufficient to melt nearly all of...
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 “It’s like going in and getting a blood test, and the doctor saying you’re OK or you’re not,” Greg Asner tells The Guardian of his Carnegie Airborne Observatory team's monitoring of drought-stricken...
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Climate change could give San Francisco the climate index of San Diego and New York City the climate index of Oklahoma City, according to new research from Ken Caldeira and high school intern Yana...
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Washington, DC— Climate change caused by greenhouse gas emissions will alter the way that Americans heat and cool their homes. By the end of this century, the number of days each year that heating...
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Stop burning fossil fuels now: there is no CO2 'technofix', scientists warn...
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Washington, DC—Continuing current carbon dioxide (CO2) emission trends throughout this century and beyond would leave a legacy of heat and acidity in the deep ocean. These changes would linger even...
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Washington, D.C.—Carnegie investigator Greg Asner has been elected a Fellow of the American Geophysical Union (AGU). He is one of 60 new members. The honor is given “to individual AGU members who...
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Chris Field is a co-principal investigator of the Jasper Ridge Global Change Experiment at the Jasper Ridge Biological Preserve in northern California. The site, designed to exploit grasslands as models for understanding how ecosystems may respond to climate change, hosts a number of studies of the...
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The Carnegie Airborne Observatory (CAO), developed by GregAsner, is a fixed-wing aircraft that sweeps laser light across the vegetation canopy to image it in brilliant 3-D. The data can determine the location and size of each tree at a resolution of 3.5 feet (1.1 meter), a level of detail that is...
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Anna Michalak’s team combined sampling and satellite-based observations of Lake Erie with computer simulations and determined that the 2011 record-breaking algal bloom in the lake was triggered by long-term agricultural practices coupled with extreme precipitation, followed by weak lake circulation...
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Greg Asner is a staff scientist in Carnegie's Department of Global Ecology and also serves as a Professor in the Department of Earth System Science at Stanford University. He is an ecologist recognized for his exploratory and applied research on ecosystems, land use, and climate change at regional...
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Anna Michalak joined Carnegie in 2011 from the Department of Civil and Environmental Engineering at the University of Michigan. Her research focuses on characterizing complexity and quantifying uncertainty in environmental systems to improve our understanding of these systems and our ability to...
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Joe Berry has been a Carnegie investigator since 1972. He has developed powerful tools to measure local and regional exchanges of carbon over spaces of up to thousands of square miles. He uses information at the plant scale to extrapolate the carbon balance at regional and continental scales....
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AudioWashington, D.C.—The planet’s soil releases about 60 billion tons of carbon into the atmosphere each year, which is far more than that released by burning fossil fuels. This happens through a...
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50 years after the first U.S. president was warned about climate change, it is "the defining issue of our time," Department of Global Ecology Director Chris Field told attendees. More
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USA Today reports on a first-of-its-kind experiment led by Rebecca Albright and  Ken Caldeira that found ocean acidification caused by global warming is already slowing growth of the world’s coral...
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June 28, 2018

Washington, DC—Carbon dioxide emissions from human activities must approach zero within several decades to avoid risking grave damage from the effects of climate change.  This will require creativity and innovation, because some types of industrial sources of atmospheric carbon lack affordable emissions-free substitutes, according to a new paper in Science from team of experts led by University of California Irvine’s Steven Davis and Carnegie’s Ken Caldeira.

In addition to heating, cooling, lighting, and powering individual vehicles—subjects that are often the focus of the emissions discussion—there are other major contributors to atmospheric carbon that are much more challenging

June 22, 2018

Washington, DC— Carnegie’s Greg Asner advanced through a venture capital-style pitch group challenge to win a $250,000 grant from Battery Powered that will enable his flying laboratory team to map the coral of the Hawaiian Islands.

“Mapping the health of Hawaii’s coral communities has been a long-term dream of mine going back to the early days of my scientific career,” Asner said. “This funding will finally allow me to do so comprehensively.”

Battery Powered is the member-led giving program of a private San Francisco social club called The Battery. Three times a year, the members select a different theme and hear pitches from experts and organizations who work on the front

June 4, 2018

Washington, DC—Carnegie scientist Greg Asner and his Reefscape Project play a crucial role in a new partnership that’s responding to the crisis facing the world’s coral reefs and the need for global maps and monitoring systems by harnessing satellite imagery and big data processing. Less than a quarter of the world’s reefs are sporadically mapped or monitored by visual assessment from SCUBA and light aircraft or, in a very few places, lower resolution satellite images.

The partnership will provide the first-ever seamless mosaic of high resolution satellite imagery of the world’s coral reefs and will engage with the global coral reef science and management communities to deliver

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March 19, 2018

Sabah, Malaysia—Degraded forests play a crucial role in the future survival of Bornean elephants. A new study, published in the journal Biological Conservation, finds that forests of surprisingly short stature are ideal for elephants.

“Our study indicates that forests with a mean canopy height of 13 meters (about 43 feet) were those most utilized by Bornean elephants. These forests are consistent with degraded landscapes or those recovering from previous logging, or clearance,” noted lead author Luke Evans, a postdoctoral researcher at Carnegie and Danau Girang Field Centre. “The study utilized GPS tracking data from 29 individual elephants that were collared across Sabah,

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Monitoring tropical deforestation and forest degradation with satellites can be an everyday activity for non-experts who support environmental conservation, forest management, and resource policy development.

Through extensive observation of user needs, the Greg Asner team developed CLASlite ( the Carnegie Landsat Analysis System--Lite) to assist governments, nongovernmental organizations, and academic institutions with high-resolution mapping and monitoring of forests with satellite imagery.

CLASlite is a software package designed for highly automated identification of deforestation and forest degradation from remotely sensed satellite imagery. It incorporates state-of-the

Anna Michalak’s team combined sampling and satellite-based observations of Lake Erie with computer simulations and determined that the 2011 record-breaking algal bloom in the lake was triggered by long-term agricultural practices coupled with extreme precipitation, followed by weak lake circulation and warm temperatures. The bloom began in the western region in mid-July and covered an area of 230 square miles (600 km2). At its peak in October, the bloom had expanded to over 1930 square miles (5000 km2). Its peak intensity was over 3 times greater than any other bloom on record. The scientists predicted that, unless agricultural policies change, the lake will continue to experience

Carnegie researchers are developing new scientific approaches that integrate phylogenetic, chemical and spectral remote sensing perspectives - called Spectranomics - to map canopy function and biological diversity throughout tropical forests of the world.

Mapping the composition and chemistry of species in tropical forests is critical to understanding forest functions related to human use and climate change. However, high-resolution mapping of tropical forest canopies is challenging because traditional field, airborne and satellite measurements cannot easily measure the canopy chemical or taxonomic variation among species over large regions. New technology, such as the Carnegie

Chris Field is a co-principal investigator of the Jasper Ridge Global Change Experiment at the Jasper Ridge Biological Preserve in northern California. The site, designed to exploit grasslands as models for understanding how ecosystems may respond to climate change, hosts a number of studies of the potential effects from elevated atmospheric carbon dioxide, elevated temperature, increased precipitation, and increased nitrogen deposition. The site houses experimental plots that replicate all possible combinations of the four treatments and additional sampling sites that control for the effects of project infrastructure. Studies focus on several integrated ecosystem responses to the

Carnegie Science, Carnegie Institution for Science, Carnegie Institution

Greg Asner is a staff scientist in Carnegie's Department of Global Ecology and also serves as a Professor in the Department of Earth System Science at Stanford University. He is an ecologist recognized for his exploratory and applied research on ecosystems, land use, and climate change at regional to global scales.

Asner graduated with a bachelor’s degree in engineering from the University of Colorado, Boulder, in 1991. He earned master's and doctorate degrees in geography and biology, respectively, from the University of Colorado in 1997. He served as a postdoctoral fellow in the Department of Geological and Environmental Sciences at Stanford University until he joined the

Ken Caldeira has been a Carnegie investigator since 2005 and is world renowned for his modeling and other work on the global carbon cycle; marine biogeochemistry and chemical oceanography, including ocean acidification and the atmosphere/ocean carbon cycle; land-cover and climate change; the long-term evolution of climate and geochemical cycles; climate intervention proposals; and energy technology.

 Caldeira was a lead author for the U.N.’s Intergovernmental Panel on Climate Change (IPCC) AR5 report and was coordinating lead author of the oceans chapter for the 2005 IPCC report on carbon capture and storage. He was a co-author of the 2010 US National Academy America's Climate

Anna Michalak joined Carnegie in 2011 from the Department of Civil and Environmental Engineering at the University of Michigan. Her research focuses on characterizing complexity and quantifying uncertainty in environmental systems to improve our understanding of these systems and our ability to forecast their variability. She is looking at a variety of interactions including atmospheric greenhouse gas emission and sequestration estimation, water quality monitoring and contaminant source identification, and use of remote sensing data for Earth system characterization.

The common theme of her research is to develop and apply spatiotemporal statistical data methods for optimizing the

Joe Berry has been a Carnegie investigator since 1972. He has developed powerful tools to measure local and regional exchanges of carbon over spaces of up to thousands of square miles. He uses information at the plant scale to extrapolate the carbon balance at regional and continental scales.

According to ISI's Web of Science, two of Joe Berry's papers passed extremely high, rarefied citation milestones. The 1980  paper “A biochemical model of photosynthetic CO2 assimilation in leaves of C3 species,” has had over 1,500th citations. His 1982 paper “On the relationship between carbon isotope discrimination and the intercellular carbon dioxide concentration in leaves” passed its 1,