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Published byClarence Norton Modified over 9 years ago
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Overview Basic Meteorological Assumptions Traditional Wind Model Condensation Induced Winds Derivation Experimental Evidence Greater Implications Future Research
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Weather vs Climate
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Basic Meteorological Assumptions: Hydrostatic Equilibrium Ideal Gas Law Adiabatic Expansion
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Hydrostatic Equilibrium
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Ideal Gas Law
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Adiabatic Expansion Increase in volume without heat flow in or out of the volume (mb) apollo.lsc.vsc.edu Distance (m)
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Overview Basic Meteorological Assumptions Traditional Wind Model Condensation Induced Winds Derivation Experimental Evidence Greater Implications Future Research
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Traditional Wind Model Solar Heating Causes Winds. Wind is caused by differences in pressure resulting from differential heating of the earth’s surface.
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Pressure and Temperature http://www.physicalgeography.net/fundamentals/7o.html
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Geostrophic Wind ww2010.atmos.uiuc.edu
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Thermal Wind Equation v g – Geostrophic wind v T – Thermal wind f – Coriolis parameter R – Ideal gas law constant
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Overview Basic Meteorological Assumptions Traditional Wind Model Condensation Induced Winds Derivation Experimental Evidence Greater Implications Future Research
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Overview Basic Meteorological Assumptions Traditional Wind Model Condensation Induced Winds Derivation Experimental Evidence Greater Implications Future Research
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Equations of State for Moist Air Moist air as a whole Water Vapor Dry Air P - pressure N – molar density R – molar gas constant T – absolute temperature
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Relative Molar Density of Water Vapor The process of condensation in the rising air should be reflected through the changes in:
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Molar rate of condensation per unit volume: (1) - velocity vector directed along the temperature gradient toward the lower temperature - vertical velocity - horizontal velocity vertical condensation rate Gravitational expansion Horizontal expansion
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Coordinate System w 0,u 0 is considered to be the isothermal plane whereas w,u is the horizontal plane.
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Stationary Continuity Equation (2) If we consider: (3) And the conservation of mass for dry air: (4)
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We can conclude that: If we assume an isothermal plane, molar density does not change. (5) (6)
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We can combine (1) and (5) with a substitution from (6) to obtain: (7) (1) (5) (6)
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Compact Form: (9) Using the definition for : (8)
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Hydrostatic Equilibrium Adiabatic ascent of moist saturated air The only phase transition will be condensation in the vertical direction. Looking strictly at isothermal horizontal plane:
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Adiabatic Ascent Parcel will not rise in a vertically isothermal atmosphere
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Adiabatic ascent with a temperature gradient applied in the vertical direction.
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Overview Basic Meteorological Assumptions Traditional Wind Model Condensation Induced Winds Derivation Experimental Evidence Greater Implications Future Research
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Cylindrical Transformation: Using change of coordinates:
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Cylindrical Coordinates u(r) - radial velocity w(r) – vertical velocity v(r) – tangential velocity
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U - The velocity of hurricane movement as a whole also known as translation speed.
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Theoretical radial and tangential velocity vs category 5 data set o – Data at different levels from twelve observed category 5 hurricanes. - Median values of data sets. Data Analysis from Makarieva and Gorshkov
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Theoretical Pressure profile vs Holland’s profile Theoretical values for pressure vs Holland’s profile values (empirical).
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Overview Basic Meteorological Assumptions Traditional Wind Model Condensation Induced Winds Derivation Experimental Evidence Greater Implications Future Research
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Forestry and Precipitation “The biotic pump is a mechanism in which natural forests create and control ocean-to-land winds, bringing moisture to all terrestrial life.” --Gorshkov and Makarieva 2012
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Overview Basic Meteorological Assumptions Traditional Wind Model Condensation Induced Winds Derivation Experimental Evidence Greater Implications Future Research
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Add a condensation component from the biotic pump theory to a climate model. Future Research
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Jennifer Fowler – Mentor and all around awesome lady. Makarieva and Gorshkov – Theory Authors. Alex Bulmahn MSGC (Montana Space Grant Consortium) University of Montana Physics and Astronomy Department
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