Frequency dependence of Q in the mantle underlying the shield areas of Eurasia, Part III: The Q model   总被引：2，自引：0，他引：2  

Zoltan A. Der  Alison C. Lees  Vernon F. Cormier 《Geophysical Journal International》1986,87(3):1103-1112

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Frequency dependence of Q in the mantle underlying the shield areas of Eurasia, Part I: analyses of short and intermediate period data   总被引：1，自引：0，他引：1  

Zoltan A. Der  Alison C. Lees  Vernon F. Cormier  Lisa M. Anderson 《Geophysical Journal International》1986,87(3):1057-1084

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The DEEP2 Galaxy Redshift Survey: environments of post-starburst galaxies at z∼ 0.1 and ∼0.8     

Renbin Yan  Jeffrey A. Newman  S. M. Faber  Alison L. Coil †  Michael C. Cooper ‡  Marc Davis  Benjamin J. Weiner  Brian F. Gerke  David C. Koo 《Monthly notices of the Royal Astronomical Society》2009,398(2):735-753

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Policing in drag: Giuliani goes global with the illusion of control     

Alison Mountz  Winifred Curran 《Geoforum》2009,40(6):1033-1040

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Raman spectroscopy and biomarker analysis reveal multiple carbon inputs to a Precambrian glacial sediment     

Alison Olcott Marshall  Frank A. Corsetti  Alex L. Sessions  Craig P. Marshall 《Organic Geochemistry》2009,40(11):1115-1123

Extractable biomarkers can help elucidate the environment and biota of ancient glaciations, although the method must be applied with care, as glacial sediments have a potential for incorporation of older detrital carbon. In Phanerozoic glacial sediments, the distinct elemental, molecular and isotopic compositions of the terrestrial and marine biomass allow discrimination between primary marine and redeposited terrestrial organic matter. However, as the Proterozoic biosphere was largely microbial and marine, biomarker and isotopic analyses are insufficient for distinguishing primary organic matter from secondary reworked organic matter. Here, we report the combined application of Raman spectroscopy and biomarker analysis to Precambrian glacial sediments, which, together, allows discrimination between mixed pools of organic carbon and provides a promising new approach for rapidly screening Precambrian sediments for immature organic matter amenable to biomarker analysis.  相似文献   

Emergence in crustal plumbing systems     

Bruce E. Hobbs  Alison Ord  Chongbin Zhao 《Journal of Geochemical Exploration》2009

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Investigating Ionospheric Scintillation Effects on Multifrequency GPS Signals     

Salles  Lucas A.  Vani  Bruno C.  Moraes  Alison  Costa  Emanoel  de Paula  Eurico R. 《Surveys in Geophysics》2021,42(4):999-1025

Surveys in Geophysics - Over the last 15 years, the satellite constellation of the global positioning system (GPS) has been modernized for more precise applications, with the introduction...  相似文献   

Simulation of river flow in Britain under climate change: Baseline performance and future seasonal changes     

Alison L. Kay 《水文研究》2021,35(4):e14137

Climate change is likely to manifest in river flow changes across the globe, which could have wide-ranging consequences for society and the natural environment. A number of previous studies used the UK Climate Projections 2009 (UKCP09) to investigate the potential impacts on river flows in Britain, but these projections were recently updated by the release of UKCP18, thus there is a need to update flow studies. Here, the UKCP18 Regional (12 km) projections are applied using a national-scale grid-based hydrological model, to investigate potential future changes in seasonal mean river flows across Great Britain. Analysis of hydrological model performance using baseline climate model data (1980–2010) shows relatively good agreement with use of observation-based data, particularly after application of a monthly precipitation bias-correction. Analysis of seasonal mean flow changes for two future time-slices (2020–2050 and 2050–2080) suggests large decreases in summer flows across the country (median −45% by 2050–2080), but possible increases in winter flows (median 9% by 2050–2080), especially in the north and west. Information on the potential range of flow changes using the latest projections is necessary to develop appropriate adaptation strategies, and comparisons with previous projections can help update existing plans, although such comparisons are often not straightforward.  相似文献   

Evaluating the influence of mixture composition on the kinetics of salt damage in wall paintings using time lapse video imaging with direct data annotation     

Alison Sawdy  Adrian Heritage 《Environmental Geology》2007,52(2):303-315

This paper presents an examination of the timescale of phase transition behaviour of a series of salts known to cause damage to wall paintings and other cultural property. The rate of deliquescence and crystallisation of single salts (nitromagnesite and halite) under different RH regimes, and the extent to which this was affected when mixed with other salts (niter, nitratite and gypsum), was investigated. The study was conducted using simple conventional techniques (mass measurements over time) and also using an innovative new method: timelapse video imaging with online data annotation. The results demonstrate the synergy gained from combining video imaging with environmental data in reference to time in the study of salt phase changes: where it revealed new information concerning the kinetics of deliquescence and crystallisation. The implications of these results for the implementation of environmental control measures within historic buildings are discussed.

Alison SawdyEmail:

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Influence of landscape restoration and degradation on storm surge and waves in southern Louisiana     

Ty V. Wamsley  Mary A. Cialone  Jane M. Smith  Bruce A. Ebersole  Alison S. Grzegorzewski 《Natural Hazards》2009,51(1):207-224

The purpose of this investigation was to examine storm surge and wave reduction benefits of different environmental restoration features (marsh restoration and barrier island changes), as well as the impact of future wetland degradation on local surge and wave conditions. Storm surge simulations of two representative hurricanes were performed using the ADCIRC storm surge model with the inclusion of radiation stress gradients from the STWAVE nearshore wave model. Coupled model simulations were made for a number of landscape configurations that involved both restored and degraded wetland features. The impact of barrier island condition on hurricane surge and waves was also evaluated. Effects of landscape features were represented by changes in elevation and frictional resistance. Restoration and degradation of marsh resulted in decreases (for restoration cases) and increases (for degradation cases) in both surge and waves. The magnitude of change was correlated with the magnitude of the horizontal extent and elevation changes in the marsh. In general, the wave change patterns are consistent with the water level changes. Deflation of the Chandeleur Islands (barrier island chain) resulted in slightly increased surge. Results suggest that coastal marsh does have surge and wave reduction potential. Results also indicate that the impact of the landscape features is amplified in areas where there are levee “pockets.” Barrier islands and coastal ridges reduce wave heights, even if in a degraded condition and thus can reduce wave energy in wetland areas, protecting them from erosion.  相似文献