atmospheric data Articles
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Competitive adsorption of boric acid and chromate onto alumina in aqueous solutions
The competitive adsorption of boric acid and chromate from aqueous solutions by alumina has been investigated by spectrophotometry at pH 8, ionic strength = 0.0, 0.1 and 1.0 M NaClO4, T = 22 ± 3 °C and under normal atmospheric conditions. The experimental data show that addition of excess boric acid in the system leads to the increase of Cr(VI) concentration in ...
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Predicting soil temperature by applying atmosphere general circulation data in west Iran
The main objective of this study is to develop a general methodology for predicting soil temperature based on general circulation data. To meet this demand, we used temperature data that can be profitably used to predict soil temperature in a period of 20 years. Accordingly, air temperature data were downscaled to 2016–2025 based on LARS-WG data. The obtained results indicated that the model ...
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Designing a relational database for tracking and analysis of atmospheric deposition of mercury and trace metals in the Pensacola (Florida) Bay Watershed
The need to track and analyse the atmospheric deposition of mercury and trace metals in the Pensacola (Florida) Bay Watershed in recent years has resulted in the need for a data management system that will allow data to be efficiently stored, checked for errors, manipulated, retrieved for analysis and shared within the research community. In this paper, we describe a relational database that was ...
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Uncertainty analysis of modelling studies included in air quality assessments
This paper deals with the development of a quality analysis/quality control (QA/QC) methodology for modelling studies associated with air quality assessments. Among other benefits, this will allow data quality objectives for model input data to be derived and the importance of policy oriented model applications to be assessed. The procedure for evaluating model uncertainty has profited from a ...
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Long-term variation of water vapor content and precipitation in the Haihe river basin
Based on the Haihe river basin National Centers for Environmental Prediction/National Center for Atmospheric Research reanalysis data from 1948 to 2010 and the precipitation data of 53 hydrological stations during 1957–2010, this study analyzed the variation of water vapor content and precipitation, and investigated the correlation between them using several statistical methods. The ...
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Parameterisation of convective PBL using surface data for the wind and stability classes
A simple two-layer model of convective planetary boundary layer (CPBL), consisting of a Surface Layer and an Ekman layer over it and developed in accordance with the similarity theory is used to obtain the vertical profiles of the temperature, wind velocity and the turbulent exchange coefficient in CPBL from the surface wind measurements and atmospheric stability data. As input to this model the ...
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New network of weather stations in Sheffield - Case Study
OTT HydroMet is installing fifteen automatic weather stations as part of the University of Sheffield’s Urban Flows Observatory, which is led by the Departments of Civil and Structural Engineering, and Automatic Control and Systems Engineering (ACSE). The monitoring sites are conveniently located at Sheffield schools, and data from the stations will contribute to the project’s wider ...
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Global warming, and role of supplementary cementing materials and superplasticisers in reducing greenhouse gas emissions from the manufacturing of portland cement
This paper discusses some aspects of global-warming, and the role of supplementary cementing materials and superplasticisers in reducing greenhouse gas emissions to the atmosphere. The data are presented as to the CO2 emissions per capita per year from various countries. Also, the relative information is given on the availability of cement and supplementary cementing materials worldwide. The ...
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3D Visualization of Seismic Activity Associated with the Nazca and South American Plate Subduction Zone (Along Southwestern Chile) Using RockWorks
Abstract The visualization of earthquake data in conjunction with surface imagery is an ideal application for three dimensional computer software. Downloading earthquake epicenter data, satellite imagery, and surface topography from the Internet is a relatively simple process. To illustrate the downloading process and the visualization techniques, this study provides a step-by-step analysis of ...
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Spatial and temporal patterns of remotely-sensed and field-measured rainfall in southern California
Quantification of spatial and temporal patterns of rainfall is an important step toward developing regional hydrological models. However, traditionally used rain gauge data are sparse and do not always provide adequate spatial representation of rainfall. In this study, we evaluated the daily 1-degree resolution remotely-sensed atmospheric precipitation data provided by Global Precipitation ...
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Why Does the Non-Orthogonal Sonic Anemometer Underestimate
The performance of non-orthogonal sonic anemometers has been the subject of much discussion in recent years. It followed findings that they underestimated vertical winds and vertical heat fluxes by 10-15%. For agricultural and forestry scientists who depended on them for their large-scale energy balance studies this was a bad surprise. They had collected turbulence data from hundreds of ...
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Water Level Measurements-Part 1
Confused about which instrumentation to use in your water level monitoring system? In-Situ offers two categories of pressure sensors for water level measurements: absolute or non-vented sensors, and gauged or vented sensors. They look the same and both measure pressure and water level, but they have drastically different applications, outputs and accuracy. The absolute (or non-vented) water level ...
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Numerical modelling of gas dispersion from road tunnels in urban environments: comparison with field experiment data
Numerical computations and field experiments of the dispersion of a tracer gas from a road tunnel in Paris are compared. The Reynolds-averaged Navier-Stokes equations, combined with the k-ε turbulence model of Chen and Kim, are solved using the finite-volume code PHOENICS. Results are shown to be sensitive to the turbulence modelling and to the parameterisation of turbulence and drag forces ...
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Potential Benefits and Implementation of MM5/RUC2 Data with the CALPUFF Air Modeling System
In April 2003, U.S. EPA officially revised the federal guidelines for air quality modeling (40 CFR Part 51, Appendix W) to incorporate CALPUFF as the preferred dispersion model to study long-range pollutant transport for regulatory purposes. At the absolute minimum, CALMET (CALPUFF’s meteorological preprocessor) requires hourly measurements of surface meteorological data and twice-daily upper air ...
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Potential Benefits and Implementation of MM5/RUC2 Data with the CALPUFF Air Modeling System
In April 2003, U.S. EPA officially revised the federal guidelines for air quality modeling (40 CFR Part 51, Appendix W) to incorporate CALPUFF as the preferred dispersion model to study long-range pollutant transport for regulatory purposes. At the absolute minimum, CALMET (CALPUFF’s meteorological preprocessor) requires hourly measurements of surface meteorological data and twice-daily upper air ...
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Using the HydraProbe soil sensor for determination of flood risk in the New York State Mesonet - Case Study
New York's Mesonet uses the HydraProbe and other meteorological sensors to help forecast flood hazards and climate. In January 2014, the Department of Homeland Security established the New York State Early Warning Weather Detection System. The centerpiece of the system is the New York State Mesonet, a network of 125 weather stations across the state, with at least one site in every county. Each ...
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Meteorological data for dispersion modelling: a brief report on the COST 710 programme on pre-processing and harmonisation
Dispersion models need reliable meteorological data to run properly. Some of the meteorological data required by dispersion models are not routinely measured and have to be inferred from other measurements. The purpose of this cooperative study under the COST 710 Action is to improve and harmonise the methods of pre-processing the necessary meteorological input data. This should ensure that ...
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`Potential Benefits and Implementation of MM5/RUC2 Data with the CALPUFF Air Modeling System,` presented at the 2004 AWMA annual conference
Abstract In April 2003, U.S. EPA officially revised the federal guidelines for air quality modeling (40 CFR Part 51, Appendix W) to incorporate CALPUFF as the preferred dispersion model to study long-range pollutant transport for regulatory purposes. At the absolute minimum, CALMET (CALPUFF's meteorological preprocessor) requires hourly measurements of surface meteorological data and twice-daily ...
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A sewer process model as planning and management tool – hydrogen sulfide simulation at catchment scale
The collection system of a major city at the Persian Gulf was simulated for bulk water hydrogen sulfide and the release of sewer gas to the urban atmosphere. Geometry data on 870 km of sanitary sewer and data on dry weather flow entering all nodes in the catchment was exported from a Mike Urban database and imported to the sewer process model WATS. The process model then routed sewage and sewer ...
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CO₂ Monitoring for the Early Detection of Spoilage: Stored Grains
CO2 monitoring plays a vital role in the preservation of stored grains and cereals. In a recent article published by Process Industry Informer, it was highlighted that over 50% of stored grains are lost after harvesting due to spoilage caused by mould or insect infestation, and amounts to roughly $1 trillion per year in losses. However, these major economic losses can be combatted by the early ...
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