Research Topics Include:
Effects of vegetation on methane emissions from Arctic Tundra Ecosystems. Earth System Science. Ph.D.. 2009.
Radiocarbon and Soil Carbon Dynamics. Annual Review of Earth and Planetary Sciences. 37:47-66.. 2009.
Effects of temperature and fertilization on nitrogen cycling and community composition of an urban lawn. Global Change Biology. 14:2119-2131.. 2008.
The Carbon-Land Model Intercomparison Project (C-LAMP): A Protocol and Evaluation Metrics for Global Terrestrial Biogeochemistry Models. iEMSs Fourth Biennial Meeting: International Congress on Environmental Modeling and Software. 2. 2008.
Uptake of an amino acid by ectomycorrhizal fungi in a boreal forest. Soil Biology & Biochemistry. 40:1964-1966.. 2008.
Rapid shifts in plant distribution with recent climate change. Proceedings of the National Academy of Sciences of the United States of America. 105:11823-11826.. 2008.
Isotopic and geochemical evidence of palaeoclimate changes in Salton Basin, California, during the past 20 kyr: 1. δ18O and δ13C records in lake tufa deposits. Palaeogeography, Palaeoclimatology, Palaeoecology. 259:182-197.. 2008.
|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|
The goals of our research are twofold.
First,we seek to understand 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. Is black carbon, produced on land, a significant source of old oceanic DOC?
|Ellen Druffel Homepage|
|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.
Our research focuses on how terrestrial ecosystems work, with an emphasis on what controls the exchanges of gases and energy between land surfaces and the atmosphere. This research is relevant to several environmental problems, including understanding changes in climate and global biogeochemistry. Our approach is interdisciplinary, borrowing techniques and ideas from a range of academic disciplines including plant physiology, community and ecosystem ecology, hydrology, micrometeorology, environmental physics, and biogeochemistry.
|Michael Goulden Homepage|
During the last two decades, it has become clear that microbes are present in practically all corners of the world - from the hot springs of Yellowstone to the deep subsurface of the ocean. DNA methods have uncovered a hitherto unknown biodiversity and conservative estimates predicts that microorganisms constitute more than 50% of the total biomass on Earth. Due to their diversity and abundance, microbes are significant contributors to most nutrient cycles in the global ecosystem and play a key role in climate regulation.
|Adam Martiny Homepage|
|Moore Modeling Lab||
I am an oceanographer interested in the role of marine biota in global biogeochemical cycles and Earth's climate system. My 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.
|Keith Moore Homepage|
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||
We are 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. We use global observations and a hierarchy of ocean models together with advanced computational and mathematical techniques to study the ocean. Our current research is directed in three broad areas:
|Francois Primeau Homepage|
We seek to improve our understanding of global change in terrestrial ecosystems. We use remote sensing data, atmospheric trace gas observations, field measurements, and models in new ways to study feedbacks between terrestrial ecosystems and climate.
|James Randerson's Homepage|
|Saltzman / Aydin Research Group||
The oceans produce a diverse array of trace gases that affect the chemistry of the atmosphere and the climate system. Our goal is to understand what controls the production, emissions, and atmospheric chemistry of oceanic trace gases. We develop trace gas detectors, collect field data from islands and ships and use computer models to simulate natural processes.
|Saltzman / Aydin Research Group|
Trumbore uses stable and radioisotopes (especially 14C) to study how the Earth's natural exchanges of carbon among ocean, land and atmosphere are altered by human activity.She is a founding member of the Earth System Science Department at UC Irvine, and a co-director of the WM Keck Carbon Cycle Accelerator Mass Spectrometry Facility at UC Irvine.
|Sue Trumbore's Lab|
|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|
The Czimczik lab's research aims at understanding 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. Our research seeks 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, ie. arctic tundra and boreal forests.
|Claudia Czimczik's Homepage|