PaleoClimate and PaleoRun Overview by Arwen Vaughan, Rothwell: 2013/Third Annual PaleoGIS & PaleoClimate Users Conference
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This document introduces PaleoClimate and PaleoRun software tools. PaleoClimate is a desktop application that models ancient climate conditions like temperature, wind, and ocean currents. It was built on earlier work and complements the PaleoGIS tool. PaleoRun allows batch processing of multiple PaleoGIS or PaleoClimate jobs through a single XML configuration file for scenarios like running long jobs or regularly scheduled reconstructions.
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All available historic data has been compiled and incorporated into a mineral potential map based on the porphyry mineral system. Maps representing all components of the porphyry mineral system including source, transport, trap and deposition have been created, resulting in binary maps which show where each characteristic is present or absent. These are then compared to known mineral occurrences, or training points. The weights of evidence technique was used for the modelling. This technique calculates the relationship of the area covered by the characteristic being tested and the number of training data points that fall within that area. For each map a contrast value ‘C’ gives a relative measure of the strength of the correlation, and a Studentised contrast value ‘StudC’ gives a relative measure of the reliability of the C value, i.e. a high C and StudC value implies a strong spatial correlation and a reliable result, which occurs when more training points are captured within a smaller area.
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EHST 3600 1
LAST SESSION REVIEW
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• Terrain
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LAST SESSION REVIEW
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DISPERSION OF POLLUTANTS
IN THE ATMOSPHERE
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SESSION OBJECTIVES
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SESSION OUTLINE
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ATMOSPHERIC DISPERSION OF
EFFLUENTS FROM SOURCES
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EHST 3600 2
SETTLING VELOCITY
• Low settling velocity
• Gases
• Fine particles (20
um or smaller)
• Larger settling velocity
• Large particles
• Results in a higher
ground-level
concentration of
the solid pollutant
closer to the stack
than is the case for
gases.
• No wind speed
• Low-density plumes tend to
reach high elevations; ground
concentrations are low
• Large particles and dense gas
plumes fall to the ground in
the vicinity of the stack
• High wind speed
• Increases the diluting action of
the atmosphere
• Gives rise to lower ground-
level concentrations
downwind from the stack
𝑉𝑠
𝑢
≥ 1.5
PREVENTION OF DOWNWASH
To achieve
maximum
dispersion, the
effluents should
leave the stack with
sufficient
momentum and
buoyancy that they
continue to rise from
the stack exit.
𝑉𝑠
𝑢
≥ 1.5
• Stack gas velocity = 6.8 mph
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• Possibility of downwash?
• If <1.5, calculate the reduced stack height:
ℎ𝑠
′ = ℎ𝑠 + 2𝑑𝑠
𝑉𝑠
𝑢𝑠
− 1.5
hs
METEOROLOGICAL SCALES
OF AIR MOTION
Scale Geo. Area
(km2)
Time
Period
Meteorological Phenomenon
Planetary
scale
Weeks-
months
Atmospheric circulation; Hadley cell
flows; Tropical storms; Jet stream
meanders; Cold & warm front
Meso
scale
15-160+ Hours-
Days
Land/sea breeze; Valley winds; Urban
heat island
Synoptic
Scale
>106 Days Migratory high & low pressure systems;
Cold & warm fronts; Semi permanent
high-pressure systems
Micro
scale
< 10 Minutes Plume behavior; Building downwash ;
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THE EDDY D
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PaleoClimate and PaleoRun Overview by Arwen Vaughan, Rothwell: 2013/Third Annual PaleoGIS & PaleoClimate Users Conference
- 1. Introducing PaleoClimate & PaleoRun 3rd Annual PaleoGIS and PaleoClimate™ User’s Conference 2013
- 3. What is PaleoClimate? • • • Desktop application Employs a parametric approach to modelling the climate of ancient earth Computes sea level air pressure, surface air pressure, sea level temperature, surface temperature, wind direction and azimuth, ocean currents, coastal upwelling, and wetness
- 4. Origin of PaleoClimate • Built on work by J.T. Parrish, Scotese, Ross, & Summerhayes Scotese, C. R & Summerhayes, C.P. (1986). Computer Model of Paleoclimate Predicts Coastal Upwelling in the Mesozoic and Cenozoic. Geobyte
- 5. Why did we build this tool? • • Complementary to PaleoGIS Geologists and GIS professionals can dynamically visualize and analyze a wide range of paleoclimate scenarios that may have affected the deposition of organic materials and the formation of reservoirs.
- 6. How does it relate to PaleoGIS? ● PaleoClimate can be launched from PaleoGIS • PaleoClimate’s outputs are viewable in ArcMap or in a variety of other GIS applications • PaleoClimate is the next step in developing a complete picture of the geology for an age
- 7. Paleo Process Lithofacies Paleoclimate Paleogeography Model-based Analysis Plate Tectonic Model Basic Geosciences & Geophysics
- 8. Parametric Approach • • • • • PaleoClimate offers rapid cycle & iterative analysis Not intended to replace robust Global Circulation Modelling performed on supercomputers Geoscientists can quickly explore a wide variety of factors and fine tune assumptions Supports first pass screening activities Validate the need to invest in more sophisticated and costly climate analysis
- 9. Additional Configuration Configure up to 45 additional parameters to finely tune assumptions for an age ●Axial tilt ●Western intensification ●Coriolis deflection ●Paleography values ●Effective latitude ●House shift
- 10. Sample Outputs Pictured here (top to bottom): Surface Pressure and Ocean Currents, Coastal Upwelling and Surface temperature for Winter, Northern Hemisphere
- 13. What is PaleoRun? • • • • • Batch processing tool for the Paleo suite Command line executable Multiple PaleoGIS or PaleoClimate jobs in series Driven by a single XML configuration file Simple to run from any scripting language
- 14. What can PaleoRun do? • • • • • • • • • Reconstruction Multi-reconstruction Animation Point Path Visualization Instantaneous motion Azimuth & Rate vs Time Climate Modelling Modify Metadata Add Layers and Symbolize
- 15. Common Scenarios • • • • To reconstruct supplementary datasets from third-party vendors To execute a large number of jobs, such as when new plate model data is received To run one or more long-running jobs, such as large raster reconstructions To schedule jobs through the Windows Task Scheduler
- 16. Advantages of PaleoRun • • • • • • Script a series of jobs with DOS scripting tools Run a series of jobs as a single batch Use outputs from one job as inputs to another Schedule scripted jobs to run at regular intervals Schedule long-running jobs overnight or over the weekend Re-run job scripts many times with consistent results