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Now showing items 46-65 of 355

A combined hydrodynamic and mixing model approach to quantify small saline groundwater input into rivers

Morrison Timothy; Rayburg Scott; Hughes Catherine (International Association of Hydrological Sciences, 2011)

The flow of groundwater into a stream is difficult to quantify. Several techniques exist, however they all have limitations with both practicality and accuracy being difficult to achieve. This study develops a method that ...
Combining scintillometer measurements and an aggregation scheme to 3 estimate area-averaged latent heat flux during the AMMA experiment

Ezzahar J.; Chehbouni A; Hoedjes J; Ramier D.; Boulain Nicolas; Boubkraoui Stã©Phane; Cappelaere B.; Descroix L.; Mougenot B; Timouk F. (Elsevier Inc, 2009)

This paper deals with the issue of using scintillometry in conjunction with a simple aggregation scheme to derive area-averaged sensible and latent heat fluxes over a small watershed in Niamey, Niger (Wankama catchment). ...
Comparison of algorithms for incoming atmospheric long-wave radiation

Flerchinger G; Xaio Wei; Marks Danny; Sauer T; Yu Qiang (American Geophysical Union, 2009)

While numerous algorithms exist for predicting incident atmospheric long-wave radiation under clear (L clr ) and cloudy skies, few comparisons have been published to assess the accuracy of the different algorithms. Virtually ...
A comparison of deflation basin (wetland) soils from wet and dry climatic zones in Tasmania

Neave Melissa; Rayburg Scott; Curtis Ellen (International Association of Hydrological Sciences, 2011)

Deflation basins, or shallow depressions formed by wind erosion, are found in many semi-arid regions around the world. Because these features are topographic lows they become sites of water accumulation and are often ...
A comparison of digital elevation models generated from different data sources

Rayburg Scott; Thoms Martin; Neave Melissa (Elsevier, 2009)

It can be challenging to accurately determine the topography of physically complex landscapes in remote areas. Ground-based surveys can be difficult, time consuming and may miss significant elements of the landscape. This ...
A comparison of soil scientist estimations and laboratory determination of some Arizona soil properties

Post Donald; Huete Alfredo; Pease Douglas (Soil and Water Conservation Society, 1986)

Samples of representative Arizona soils were sent to 36 soil scientists who were asked to estimate the sand, silt, and clay percentage; organic matter percentage; cation exchange capacity; carbonate content; and wilting ...
Comparison of the bioaccumulation from seawater and depuration of heavy metals and radionuclides in the spotted dogfish Scyliorhinus canicula (Chondrichthys) and the turbot Psetta maxima (Actinopterygii: Teleostei)

Jeffree Ross; Warnau Michel; Teyssie Jean-Louis; Markich Scott (Elsevier Inc, 2006)

The bioaccumulation of selected heavy metals and radionuclides (241Am, 109Cd, 57Co, 51Cr, 134Cs, 54Mn and 65Zn) from seawater was experimentally compared in the Chondrichthyan Scyliorhinus canicula (spotted dogfish) and ...
Comparison of the microalgal community within fast ice two sites along the Ross Sea coast, Antarctia

Hegseth E; Ryan Ken; Martin A; Davy S; O'Toole R; Ralph Peter; Mcminn Andrew; Thorn C (Cambridge University Press, 2006)

Diverse microbial communities survive within the sea ice matrix and are integral to the energy base of the Southern Ocean. Here we describe initial findings of a four season survey (between 1999-2004) of community structure ...
Compensatory effects of boat wake and dredge spoil disposal on assemblages of macroinvertebrates

Bishop Melanie (Estuarine Res Federation, 2005)

Estuarine assemblages are exposed to multiple disturbances that. overlap in time and space. Along the Atlantic Intracoastal Waterway (east coast, United States), two disturbances that frequently co-occur are the production ...
Compilation of total organic and inorganic carbon data from Peru margin and eastern equatorial Pacific drill sites

Meister Patrick; Prokopenko Mikhail; Skilbeck Charles; Watson Michael (Texan A&M University, 2005)
The Compounding Effects of Tropical Deforestation and Greenhouse Warming on Climate

Zhang Huqiang; Henderson-Sellers Ann; Mcguffie Kendal (Springer, 2001)

This study reports the first assessment of the compounding effects of land-use change and greenhouse gas warming effects on our understanding of projections of future climate. An AGCM simulation of the potential impacts ...
Comprehensive Performance Evaluation of a High Speed Brushless DC Motor Using an Improved Phase Variable Model

Chen Jiaxin; Guo Youguang; Zhu Jianguo (Japanese Society of Applied Electromagnetics and Mechanics, 2007)

This paper presents the performance evaluation of a high-speed surface mounted PM brushless DC motor by using an improved phase variable model. Magnetic field finite element analyses are conducted to accurately calculate ...
Computation of Incremental Inductances for Nonlinear Dynamic Analysis of a PM Claw Pole SMC Motor

Zhu Jianguo; Lu Hai Yan; Guo Youguang; Jin Jianxun (Japanese Society of Applied Electromagnetics and Mechanics, 2007)

Proper determination of winding inductances is a key factor for design and performance simulation of electrical machines. This paper presents the computation of the incremental inductances of a three-phase three-stack ...
Constituent of Natural Organic Matter (NOM) and its effect in water

Shon Ho Kyong; Erdei Laszlo; Kim Jongho (Korea Society of Industrial and Engineering Chemistry, 2006)

Natural organic matter (NOM) should be carefully considered in terms of its constituent and effect because NOM is complex substances that occur in spatially and seasonally varying concentrations in naturaI water. This ...
Construction of probabilistic distributions of regional climate change and their application in the risk analysis of wheat production

Luo Qunying; Jones Roger; Williams Martin; Bryan Brett; Bellotti W (Inter-Research, 2005)

Downscaled outputs from 9 climate models and information from the 2000 Intergovernmental Panel on Climate Change (IPCC) Special Report on Emission Scenarios (SRES) were used to construct probability distributions of regional ...
Contamination-free preparation of geological samples for ultra-trace gold and platinum-group element analysis

Evans, N.; Davis, J.; Byrne, J. P; French, D. (Elsevier Science, 2005)

In order to determine the most contaminant-free sample processing procedures for ultra-trace platinum-group element (PGE) and gold analysis, we have crushed and milled pure quartz in a variety of media and then performed ...
Contrasted land-surface processes along the West African rainfall gradient

Seguis L; Boulain Nicolas; Cappelaere B; Cohard J.M.; Favreau G; Galle S.; Hiernaux P.; Mougin E.; Peugeot C.; Ramier D.; Seghieri Josiane; Timouk F.; Demarez V; Demarty J; Descroix L.; Descloitres M; Grippa M.; Guichard F.; Kamagate B; Kergoat L.; Lebel T.; Le Dantec V.; Le Lay M; Massuel S; Trichon V. (John Wiley & Sons Ltd., 2011)

We review the main results of land-surface studies obtained in the three sites of the long-term observing system AMMA-CATCH. Runoff in the Sahel enhances the variability of energy partitioning between non-infiltrative areas ...
Contrasting Oceanographic Conditions And Phytoplankton Communities On The East And West Coasts Of Australia

Thompson Patrick; Bonham P; Waite Am; Clementson La; Cherukuru N; Hassler Christel; Doblin Martina (Pergamon-Elsevier Science Ltd, 2011)

The composition and dynamics of the phytoplankton communities and hydrographic factors that control them are described for eastern and western Australia with a focus on the Eastern Australian Current (EAC) and Leeuwin ...
Coral degradation and the structure of tropical reef fish communities

Feary David; Almany Gr; Jones Gp; Mccormick M (Inter-Research, 2007)

Coral reefs can be degraded by a variety of perturbations, including bleaching and predation by crown-of-thorns starfish. The combination of these disturbances has contributed to a global decline of live coral cover on ...
Coupled physical-biological modelling study of the East Australian Current with idealised wind forcing. Part 1: Biological model intercomparison

Baird Mark; Timko Patrick; Suthers Iain; Middleton John (Elsevier, 2006)

A Coupled physical-biomechanical Nitrogen-Phytoplankton-Zooplankton (NPZ) model of the pelagic ecosystem is configured for the East Australian Current (EAC). The biomechanical NPZ model uses a combination of physiological ...

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