Measurement of longwave sky radiance distribution     

Dr. Ir. P. A. M. Jacobs 《Theoretical and Applied Climatology》1984,34(3):257-265

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Trace metal solubility in an anoxic fjord     

Lucinda Jacobs  Steven Emerson 《Earth and Planetary Science Letters》1982,60(2):237-252

Intermittent anoxia in the Saanich Inlet water column provides an easily accessible marine O₂/H₂S interface to study the response of metals to both a steep redox gradient and the availability of reactive reduced sulfur species. Our study indicates a strong anoxic zone sink for copper and cadmium and the characteristically enhanced solubility of manganese and iron. Thiosulfate and sulfite are below detection limits (1 μM and 0.1 μM, respectively) and thus not important in metal complexation. Elemental sulfur concentrations are high at the oxic/anoxic interface and throughout the anoxic zone, indicating the potential for metal complexation by polysulfides. A thermodynamic approach employing metal sulfide formation and class specific sulfidic ligand complexation to generate equilibrium profiles adequately describes the solubility of iron, copper, and cadmium. The extension of this scheme to other transition and class B metals in other marine environments with redox fronts is suggested.  相似文献   

Climate change impacts on freshwater fish,coral reefs,and related ecosystem services in the United States     

Diana Lane  Russell Jones  David Mills  Cameron Wobus  Richard C. Ready  Robert W. Buddemeier  Eric English  Jeremy Martinich  Kate Shouse  Heather Hosterman 《Climatic change》2015,131(1):143-157

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Erratum to: Climate change impacts on freshwater fish,coral reefs,and related ecosystem services in the United States     

Diana Lane  Russell Jones  David Mills  Cameron Wobus  Richard C. Ready  Robert W. Buddemeier  Eric English  Jeremy Martinich  Kate Shouse  Heather Hosterman 《Climatic change》2015,131(1):159-161

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Improving Bayesian analysis for LISA Pathfinder using an efficient Markov Chain Monte Carlo method     

Luigi Ferraioli  Edward K. Porter  Michele Armano  Heather Audley  Giuseppe Congedo  Ingo Diepholz  Ferran Gibert  Martin Hewitson  Mauro Hueller  Nikolaos Karnesis  Natalia Korsakova  Miquel Nofrarias  Eric Plagnol  Stefano Vitale 《Experimental Astronomy》2014,37(1):109-125

We present a parameter estimation procedure based on a Bayesian framework by applying a Markov Chain Monte Carlo algorithm to the calibration of the dynamical parameters of the LISA Pathfinder satellite. The method is based on the Metropolis-Hastings algorithm and a two-stage annealing treatment in order to ensure an effective exploration of the parameter space at the beginning of the chain. We compare two versions of the algorithm with an application to a LISA Pathfinder data analysis problem. The two algorithms share the same heating strategy but with one moving in coordinate directions using proposals from a multivariate Gaussian distribution, while the other uses the natural logarithm of some parameters and proposes jumps in the eigen-space of the Fisher Information matrix. The algorithm proposing jumps in the eigen-space of the Fisher Information matrix demonstrates a higher acceptance rate and a slightly better convergence towards the equilibrium parameter distributions in the application to LISA Pathfinder data. For this experiment, we return parameter values that are all within ～1σ of the injected values. When we analyse the accuracy of our parameter estimation in terms of the effect they have on the force-per-unit of mass noise, we find that the induced errors are three orders of magnitude less than the expected experimental uncertainty in the power spectral density.  相似文献   

Fossil flat-slab subduction beneath the Illinois basin, USA     

Heather Bedle  Suzan van der Lee 《Tectonophysics》2006,424(1-2):53-68

The Illinois basin is one of several well-studied intracratonic sedimentary basins within the North American craton whose formational mechanisms and subcrustal structure are not well understood. We study the S-velocity structure of the upper mantle beneath the Illinois basin and its surrounding area through seismic tomography. We utilize continental scale waveform data of seismic S and surface waves, enhanced by regional earthquakes located near the Illinois basin. Our 3D tomographic model, IL05, confirms the existence of a slow S-velocity structure in the uppermost mantle beneath the Illinois basin region. This anomalously slow region exists from the base of the crust to depths of  90 km, and is slower than the North American cratonic average by about 200 m/s. This anomalous uppermost mantle beneath the Illinois basin is underlain by a faster lithosphere, typical of the surrounding craton, to depths of  200 km. Excluding the formation of the Reelfoot Rift, this area of North American has been stable for over 1.0 Gy. Thus, we do not expect thermal anomalies from before that time to persist into present day S-velocity anomalies and we consider a delamination origin as an explanation of Illinois basin subsidence unlikely. We cannot rule out that the slow mid-lithosphere beneath the Illinois basin is caused by an uppermost mantle enriched by a deep, but weak plume. We attribute the slow mid-lithosphere to the presence of either oceanic, hydrous crust, or, a relatively cool mantle wedge with preserved hydrous minerals in the Illinois basin's uppermost mantle, related to a fossilized flat subduction zone.  相似文献