Now showing items 1-10 of 77
Late Holocene lake level dynamics inferred from magnetic susceptibility and stable oxygen isotope data: Lake Elsinore, southern California (USA)
(Kluwer Academic Publishers; Springer Science+Business Media, 2004-04)
Southern California faces an imminent freshwater shortage. To better assess the future impact of this water crisis, it is essential that we develop continental archives of past hydrological variability. Using four sediment ...
What Makes a Problem GP-Hard? Analysis of a Tunably Difficult Problem in Genetic Programming
(Kluwer Academic Publishers; Springer Science+Business Media, 2001-06)
This paper addresses the issue of what makes a problem genetic programming (GP)-hard by considering the binomial-3 problem. In the process, we discuss the efficacy of the metaphor of an adaptive fitness landscape to explain ...
Coupled Clouds and Chemistry of the Giant Planets— A Case for Multiprobes
(Kluwer Academic Publishers; Springer Science + Business Media, Inc., 2005-01)
In seeking to understand the formation of the giant planets and the origin of their atmospheres, the heavy element abundance in well-mixed atmosphere is key. However, clouds come in the way. Thus, composition and condensation ...
Zeus-2D Simulations of Laser-Driven Radiative Shock Experiments
(Kluwer Academic Publishers; Springer Science + Business Media, Inc., 2005-07)
A series of experiments is underway using the Omega laser to examine radiative shocks of astrophysical relevance. In these experiments, the laser accelerates a thin layer of low- Z material, which drives a strong shock ...
Estimation and Mapping of Wet and Dry Mercury Deposition Across Northeastern North America
(Kluwer Academic Publishers; Springer Science+Business Media, Inc., 2005-03)
Whereas many ecosystem characteristics and processes influence mercury accumulation in higher trophic-level organisms, the mercury flux from the atmosphere to a lake and its watershed is a likely factor in potential risk ...
Isotopic Composition of H, HE and NE in the Protosolar Cloud
(Kluwer Academic Publishers; Springer Science+Business Media, 2003-03)
Observations and measurements in the solar wind, the Jovian atmosphere and the gases trapped in lunar surface material provide the main evidence from which the isotopic composition of H, He and Ne in the Protosolar Cloud ...
Pick-up Ion Measurements in the Heliosphere – A Review
(Kluwer Academic Publishers; Springer Science+Business Media, 2000-03)
Measurements of the composition and spatial distribution of pick-up ionsinside the heliosphere are reviewed. The first interstellar 4 He + pick-up ions were detected with the SULEICA instrument on the AMPTEspacecraft near ...
Thermodynamic efficiencies of an idealized global climate model
(Springer-Verlag, 2005-12)
We employ the heat engine framework to derive a simple method for assessing the strength of irreversible processes in global climate models (GCMs). Using the explicit energy budget of an idealized GCM, we show that the ...
Three dimensional adaptive mesh refinement on a spherical shell for atmospheric models with lagrangian coordinates
(IOP Publishing Ltd, 2007-07-01)
One of the most important advances needed in global climate models is the development of atmospheric General Circulation Models (GCMs) that can reliably treat convection. Such GCMs require high resolution in local convectively ...