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 and air...
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The Washington Post covers research from Ken Caldeira and Xiaochun Zhang, which compares warming from fossil fuel combustion with warming caused by the carbon dioxide released by the burning process...
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Washington, DC—The heat generated by burning a fossil fuel is surpassed within a few months by the warming caused by the release of its carbon dioxide into the atmosphere, according to new work from...
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The heat generated by burning a fossil fuel is surpassed within a few months by the warming caused by the release of its carbon dioxide into the atmosphere, according to new work from Carnegie’s...
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Greg Asner is interviewed for American Scientist's Sightings column, discusses the logistics and benefits of research using remote sensing technology....
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In the face of global climate change, increasing the use of renewable energy resources is one of the most urgent challenges facing the world. Further development of one resource, solar energy, is...
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To combat global climate change caused by greenhouse gases, alternative energy sources and other types of environmental recourse actions are needed. There are several proposals that involve using...
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Washington, DC— You know the old saying: Location, location, location? It turns out that it applies to the Amazon rainforest, too. New work from Carnegie’s Greg Asner illustrates a hidden tapestry of...
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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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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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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...
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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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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-...
Meet this Scientist
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...
Meet this Scientist
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Washington, D.C. — One idea for fighting global warming is to increase the amount of aerosols in the atmosphere, scattering incoming solar energy away from the Earth’s surface. But scientists...
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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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Washington, D.C.— A great deal of research has focused on the amount of global warming resulting from increased greenhouse gas concentrations. But there has been relatively little study of the pace...
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Explore Carnegie Science

Carnegie Science, Carnegie Institution, Carnegie Institution for Science,
September 20, 2017

Global biological diversity is under enormous and increasing threat from habitat loss caused by land use and climate change. Responding to this problem requires strategies that integrate elements of governance, economics, human welfare, and other societal factors. It also requires the use of geographically explicit approaches to generate safe havens for biodiversity, both in the long-term and as immediate barriers to the ongoing extinction crisis.

Prioritization of new regions for protection is often undertaken with incomplete and/or outdated information on the geography of biodiversity.  In response, Greg Asner and colleagues have created and utilized a novel capability to map

Greg Asner Receives Heinz Award
September 14, 2017

Carnegie staff scientist Greg Asner has been awarded the 22nd Heinz Award for the Environment,* “ for developing ultra-high-resolution imaging technology that provides unprecedented detail on the biodiversity and health of the world’s forests and coral reefs, and the impact of deforestation, land degradation and climate change.” The annual award comes with a cash award of $250,000.

Asner was hired in 2001 as the Department of Global Ecology’s first staff scientist. Since coming to Carnegie, Asner has pioneered new methods for investigating tropical deforestation, degradation, ecosystem diversity, invasive species, carbon emissions, climate change, and much more using satellite and

Carnegie Science, Carnegie Institution, Carnegie Institution for Science, William and Leander Anderegg
August 9, 2017

Washington, DC— The amount of time it takes for an ecosystem to recover from a drought is an important measure of a drought’s severity. During the 20th century, the total area of land affected by drought increased, and longer recovery times became more common, according to new research published by Nature by a group of scientists including Carnegie’s Anna Michalak and Yuanyuan Fang.

Scientists predict that more-severe droughts will occur with greater frequency in the 21st century, so understanding how ecosystems return to normal again will be crucial to preparing for the future. However, the factors that influence drought recovery have been largely unknown until now.

Carnegie Science, Carnegie Institution, Carnegie Institution for Science, NASA Earth Observatory
July 27, 2017

Washington, DC— If climate change is not curbed, increased precipitation could substantially overload U.S. waterways with excess nitrogen, according to a new study from Carnegie’s Eva Sinha and Anna Michalak and Princeton University’s Venkatramani Balaji published by Science. Excess nutrient pollution increases the likelihood of events that severely impair water quality. The study found that impacts will be especially strong in the Midwest and Northeast.

Rainfall and other precipitation washes nutrients from human activities like agriculture and fossil fuel combustion into rivers and lakes. When these waterways get overloaded with nutrients, a phenomenon called “eutrophication,”

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In March 2014, a technical support unit (TSU) of ten, headquartered at Global Ecology, had successfully completed a herculean management effort for the 2000-page assessment Climate Change 2014: Impacts, Adaptation, and Vulnerability, including two summaries. They were issued by the United Nations (UN) Intergovernmental Panel on Climate Change (IPCC), Working Group II co-chaired by Chris Field, Global Ecology director, with science co-directors Katie Mach and Mike Mastrandrea managing the input of over 190 governments and nearly 2,000 experts from around the world.

The IPCC, established in 1988, assesses information about climate change and its impacts. In September 2008, Field was

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

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

Until now, computer models have been the primary tool for estimating photosynthetic productivity on a global scale. They are based on estimating a measure for plant energy called gross primary production (GPP), which is the rate at which plants capture and store a unit of chemical energy as biomass over a specific time. Joe Berry was part of a team that took an entirely new approach by using satellite technology to measure light that is emitted by plant leaves as a byproduct of photosynthesis as shown by the artwork.

The plant produces fluorescent light when sunlight excites the photosynthetic pigment chlorophyll. Satellite instruments sense this fluorescence yielding a direct

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

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

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

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,