Research Topics Include:
Ultra small-mass AMS C-14 sample preparation and analyses at KCCAMS/UCI Facility. Nuclear Instruments & Methods in Physics Research Section B-Beam Interactions with Materials and Atoms. 259:293-302.. 2007.
Inferring biogenic and anthropogenic carbon dioxide sources across an urban to rural gradient. Oecologia. 152:307-322.. 2007.
Oceanic climate and circulation changes during the past four centuries from radiocarbon in corals. Geophysical Research Letters. 34. 2007.
Iron availability limits the ocean nitrogen inventory stabilizing feedbacks between marine denitrification and nitrogen fixation. Global Biogeochemical Cycles. 21. 2007.
Effect of moisture on leaf litter decomposition and its contribution to soil respiration in a temperate forest. Journal of Geophysical Research-Biogeosciences. 112. 2007.
Allocation and residence time of photosynthetic products in a boreal forest using a low-level C-14 pulse-chase labeling technique. Global Change Biology. 13:466-477.. 2007.
Regional patterns of radiocarbon and fossil fuel-derived CO(2) in surface air across North America. Geophysical Research Letters. 34. 2007.
|Research Lab||Description||Links to more information|
|W. M. Keck Carbon Cycle Accelerator Mass Spectrometry Laboratory||
In 2001, ESS/CGECR researchers Ellen Druffel, John Southon and Susan Trumbore were awarded $2 million by the W.M. Keck Foundation for the development of an accelerator mass spectrometry (AMS) facility – the Keck-Carbon Cycle AMS facility - for radiocarbon measurements in support of carbon cycle research at University of California, Irvine.
Related Research Group: Santos Research Group
|W. M. Keck Carbon Cycle Accelerator Mass Spectrometry Laboratory|
Ellen Druffel and her team investigate why the 14C age of marine dissolved organic carbon (DOC) is thousands of years old, despite evidence that most of it is produced in the surface ocean during photosynthesis. The group also studies how ocean circulation changed in the tropical and subtropical Pacific during the past millennium.
|Trumbore / Czimczik Research Group||
The focus of my research is the cycling of carbon and nitrogen in the terrestrial biosphere. I am particularly interested in understanding how climate change and alterations in land use and management as well as in the frequencies of disturbances (i.e. drought, fire) affect the allocation and residence time of carbon and nitrogen in soils and perennial plants. And, how changes in terrestrial ecosystems feed back to the climate system, e.g. by constraining future levels of greenhouse gases in the atmosphere.
The Goulden Lab focuses on how terrestrial ecosystems work, with an emphasis on what controls the exchanges of gases and energy between land surfaces and the atmosphere.
|Martiny Research Group||
Adam Martiny and his team work to identify (i) how microorganisms respond and genetically adapt to environmental variations and (ii) the biogeochemical role of this biodiversity. The results from this research are important for both understanding the basic biology and diversity of globally abundant microorganisms as well as gaining a mechanistic understanding of the biological controls on nutrient cycles.
|Moore Modeling Lab||
The Moore Modeling Lab is interested in the role of marine biota in global biogeochemical cycles and Earth's climate system. Keith Moore's research focuses on understanding how marine phytoplankton and other ocean biota influence the cycling of key elements (carbon, nitrogen, phosphorus, silicon, iron) in the oceans, and on the biogeochemical links between the ocean, atmosphere, and land through atmospheric transport and riverine runoff.
Plants and soils provide many services for society, such as the provision of food, water and materials; the regulation of atmospheric composition, hydrology, and water quality; and cultural and aesthetic services. In urban ecosystems where landscapes are intensively managed, there are also potential environmental and economic costs of creating and maintaining different soil and vegetation types. However, the environmental benefits and costs of urban landscapes have seldom been directly measured. We use a variety of methods to measure urban plant and soil processes and translate these processes into ecosystem services and disservices of interest to urban residents, managers, and policy-makers.
|Diane Pataki Homepage|
|Primeau Modeling Lab||
The Primeau Research Group is interested in the ocean's role in the climate of the Earth. The ocean plays a determining role in the variability of the climate system on inter-annual to millennial timescales. The lab uses global observations and a hierarchy of ocean models together with advanced computational and mathematical techniques to study the ocean. Francois Primeau and his team’s current research is directed in three broad areas: 1) the surface-to-surface transport and ventilation of ocean water masses; 2) inter-annual to decadal variability of the ocean's wind-driven circulation; and 3) global ocean biogeochemical cycles.
|Randerson Research Group||
The Randerson Research Group seeks to improve our understanding of global change in terrestrial ecosystems. They use remote sensing data, atmospheric trace gas observations, field measurements, and models in new ways to study feedbacks between terrestrial ecosystems and climate.
|Saltzman / Aydin Research Group||
The oceans produce a diverse array of trace gases that affect the chemistry of the atmosphere and the climate system. The Saltzman / Aydin Research Group’s goal is to understand what controls the production, emissions, and atmospheric chemistry of oceanic trace gases. Eric Saltzman, Murat Aydin, and their team develop trace gas detectors, collect field data from islands and ships and use computer models to simulate natural processes. The group is also interested in the history of trace gas/climate interactions.
Susan Trumbore has been at the Max Planck Institute for Biogeochemistry (MPI-BGC) since 2009. She is on leave from the University of California at Irvine, where she is Professor of of Earth System Science. Trumbore's main research contribution is the application of radiocarbon to study the dynamics of carbon cycling in plants and soils.
|Sue Trumbore's Homepage|
|Stable Isotope Ratio Mass Spectrometry (IRMS) Facility||
The UC Irvine IRMS Facility in the School of Physical Sciences and the School of Biological Sciences houses a variety of instrumentation to prepare and analyze gases, organic matter, inorganic samples, and water for stable isotope analysis. IRMS are used to measure the ratio of rare, heavy isotopes to common, light isotopes. There are five IRMS at UC Irvine to measure stable isotope ratios of the light elements: Carbon, Nitrogen, Oxygen, and Hydrogen.
|UC Irvine IRMS Facility|
Claudia Czimczik and her team work to understand the impacts of climate change, alterations in natural disturbance frequencies (i.e. fire), and changes in land use and management (i.e. urbanization) on the cycling of carbon and nitrogen in terrestrial ecosystems. The group's research aims to appreciate and predict how human activities will impact the functioning of terrestrial ecosystems in the future and how changing terrestrial ecosystems will feedback to the climate system. A major focus of these activities is on high-latitude ecosystems, i.e. arctic tundra and boreal forests.
|Davis Research Group||
The Davis Research Group works to understand and find ways to meet the challenge of satisfying global demand for energy, food, and goods without emitting CO2 to the atmosphere. Steve Davis and his team are interested in energy technology and policy; emissions and energy embodied in international trade; life cycle assessment; interactions of agriculture and climate; human drivers of greenhouse gas emissions; and socio-economic inertia of climate change.