Publications
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Water quality studied in areas of unconventional oil and gas development, including areas where hydraulic fracturing techniques are used, in the United States Water quality studied in areas of unconventional oil and gas development, including areas where hydraulic fracturing techniques are used, in the United States
Domestic oil and gas production and clean water are critical for economic growth, public health, and national security of the United States. As domestic oil and gas production increases in new areas and old fields are enhanced, there is increasing public concern about the effects of energy production on surface-water and groundwater quality. To a great extent, this concern arises from...
Authors
David Susong, Tanya Gallegos, Gretchen Oelsner
The effect of size and competition on tree growth rate in old-growth coniferous forests The effect of size and competition on tree growth rate in old-growth coniferous forests
Tree growth and competition play central roles in forest dynamics. Yet models of competition often neglect important variation in species-specific responses. Furthermore, functions used to model changes in growth rate with size do not always allow for potential complexity. Using a large data set from old-growth forests in California, models were parameterized relating growth rate to tree...
Authors
Adrian Das
Climate model simulations of the mid-Pliocene: Earth's last great interval of global warmth Climate model simulations of the mid-Pliocene: Earth's last great interval of global warmth
Pliocene Model Intercomparison Project Workshop; Reston, Virginia, 2–4 August 2011 The Pliocene Model Intercomparison Project (PlioMIP), supported by the U.S. Geological Survey's (USGS) Pliocene Research, Interpretation and Synoptic Mapping (PRISM) project and Powell Center, is an integral part of a third iteration of the Paleoclimate Modelling Intercomparison Project (PMIP3). PlioMIP's...
Authors
A.M. Dolan, A.M. Haywood, H.J. Dowsett
Assessing confidence in Pliocene sea surface temperatures to evaluate predictive models Assessing confidence in Pliocene sea surface temperatures to evaluate predictive models
In light of mounting empirical evidence that planetary warming is well underway, the climate research community looks to palaeoclimate research for a ground-truthing measure with which to test the accuracy of future climate simulations. Model experiments that attempt to simulate climates of the past serve to identify both similarities and differences between two climate states and, when...
Authors
Harry Dowsett, Marci Robinson, Alan Haywood, Daniel Hill, Aisling Dolan, Danielle Stoll, Wing-Le Chan, Ayako Abe-Ouchi, Mark Chandler, Nan Rosenbloom, Bette Otto-Bliesner, Fran Bragg, Daniel Lunt, Kevin Foley, Christina R. Riesselman
Accounting for the ecosystem services of migratory species: Quantifying migration support and spatial subsidies Accounting for the ecosystem services of migratory species: Quantifying migration support and spatial subsidies
Migratory species support ecosystem process and function in multiple areas, establishing ecological linkages between their different habitats. As they travel, migratory species also provide ecosystem services to people in many different locations. Previous research suggests there may be spatial mismatches between locations where humans use services and the ecosystems that produce them...
Authors
Darius Semmens, James E. Diffendorfer, Laura López-Hoffman, Carl Shapiro
Sea surface temperatures of the mid-Piacenzian Warm Period: A comparison of PRISM3 and HadCM3 Sea surface temperatures of the mid-Piacenzian Warm Period: A comparison of PRISM3 and HadCM3
It is essential to document how well the current generation of climate models performs in simulating past climates to have confidence in their ability to project future conditions. We present the first global, in-depth comparison of Pliocene sea surface temperature (SST) estimates from a coupled ocean–atmosphere climate model experiment and a SST reconstruction based on proxy data. This...
Authors
Harry Dowsett, A.M. Haywood, P.J. Valdes, Marci Robinson, D.J. Lunt, D.J. Hill, D.K. Stoll, Kevin Foley