Basic Meteorological Understanding

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Presentation transcript:

Basic Meteorological Understanding Numerical Modeling

Doc. Ref: RTC-PRE-053.1 Date of last revision: 28 August 2017 NWP Doc. Ref: RTC-PRE-053.1 Date of last revision: 28 August 2017

Doc. Ref: RTC-PRE-053.1 Date of last revision: 28 August 2017 NWP Cont. Doc. Ref: RTC-PRE-053.1 Date of last revision: 28 August 2017

Analysis Field taking the observational data into account Doc. Ref: RTC-PRE-053.1 Date of last revision: 28 August 2017

Doc. Ref: RTC-PRE-053.1 Date of last revision: 28 August 2017 NWP Cont. Conservation of momentum (Newton’s 2’d law) 3 equations for accelerations of 3-d wind (F = Ma) Conservation of mass 1 equation for conservation of air (mass continuity) 1 equation for conservation of water Conservation of energy 1 equation for the first law of thermodynamics Relationship among p, V, and T 1 equation of state (ideal gas law) Doc. Ref: RTC-PRE-053.1 Date of last revision: 28 August 2017

Doc. Ref: RTC-PRE-053.1 Date of last revision: 28 August 2017 48 Hour forecast Doc. Ref: RTC-PRE-053.1 Date of last revision: 28 August 2017

Doc. Ref: RTC-PRE-053.1 Date of last revision: 28 August 2017 72 Hour forecast Doc. Ref: RTC-PRE-053.1 Date of last revision: 28 August 2017

24 hour maximum temperature change Doc. Ref: RTC-PRE-053.1 Date of last revision: 28 August 2017

Model Outputs + Different Models Model give, wind, humidity, pressure, temperature and heights. All other parameters are calculated from these parameters. Models: Global models – like the climate models (whole earth) Limited area models (for Southern Africa) Meso scale models (for small areas like a city) Micro scale models (for clouds) Doc. Ref: RTC-PRE-053.1 Date of last revision: 28 August 2017

Model Outputs = Storm Vectors Doc. Ref: RTC-PRE-053.1 Date of last revision: 28 August 2017

Doc. Ref: RTC-PRE-053.1 Date of last revision: 28 August 2017 Climate Models Cont. Doc. Ref: RTC-PRE-053.1 Date of last revision: 28 August 2017

Doc. Ref: RTC-PRE-053.1 Date of last revision: 28 August 2017 Global Climate Models Doc. Ref: RTC-PRE-053.1 Date of last revision: 28 August 2017

Doc. Ref: RTC-PRE-053.1 Date of last revision 28 August 2017 Climate Change Cont. Doc. Ref: RTC-PRE-053.1 Date of last revision 28 August 2017

Doc. Ref: RTC-PRE-053.1 Date of last revision: 28 August 2017 Climate Change Cont. Highest emissions of CO2 found in North America, Europe and Asia (South Africa is the highest emitter in Africa) Doc. Ref: RTC-PRE-053.1 Date of last revision: 28 August 2017

Doc. Ref: RTC-PRE-053.1 Date of last revision: 28 August 2017 Climate Change Cont. Africa's main contribution is via land use change (deforestation – removes the CO2 sink) Doc. Ref: RTC-PRE-053.1 Date of last revision: 28 August 2017

Climate Change Implications Doc. Ref: RTC-PRE-053.1 Date of last revision: 28 August 2017

Climate Change Implications High temperatures, poor grass cover, lower rainfall, frequent droughts, rainstorms etc are likely to increase soil erosion far above current levels. This further weakens the capacity of the soils to support the country’s biological and economic well-being Doc. Ref: RTC-PRE-053.1 Date of last revision: 28 August 2017

Doc. Ref: RTC-PRE-053.1 Date of last revision: 28 August 2017 The End Doc. Ref: RTC-PRE-053.1 Date of last revision: 28 August 2017