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PHY2505 - Lecture 18

PHY2505 - Lecture 18. Radiation and Climate. This lecture Review of Liou IPCC definitions of radiative forcing Next lecture 1-D radiative-convective climate models IPCC results Final lecture Climate and planetary atmospheres. Overview. Chapter 2 3 4 4 8

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PHY2505 - Lecture 18

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  1. PHY2505 - Lecture 18 Radiation and Climate

  2. This lecture Review of Liou IPCC definitions of radiative forcing Next lecture 1-D radiative-convective climate models IPCC results Final lecture Climate and planetary atmospheres Overview

  3. Chapter 2 3 4 4 8 Solar variability Solar absorption Thermal RT modellingSatellite observation & scattering; absorption & retrieval aerosol & emission; atmospheric gases Review RADIATIVE FORCINGS OBSERVATION/VALIDATION Intergovernmental Panel on Climate Change

  4. Diurnal & latitudinal variationMeasurement Structure Solar variability

  5. Solar absorption bandsRayleigh scattering Radiative transfer equation Mie scattering Characteristics of aerosols 4 3 2 1 Solar absorption & scattering

  6. Spectroscopy & line shape Radiative transfer equation I(t,m)=Boexp(-t1-t2-t3)+ B1exp(-t2-t3) + B2exp(-t3) + B3 Boexp(-t1-t2)+ B1 exp(-t2)+B2 Boexp(-t1)+ B1 Bo Thermal absorption & emission

  7. Formed under WMO and UNEP in 1988 to deal with potential global climate change Working Group I assesses the scientific aspects of the climate system and climate change. Working Group II assesses the vulnerability of socio-economic and natural systems to climate change, negative and positive consequences of climate change, and options for adapting to it. Working Group III assesses options for limiting greenhouse gas emissions and otherwise mitigating climate change. The Task Force on National Greenhouse Gas Inventories is responsible for the IPCC National Greenhouse Gas Inventories Programme. IPCC

  8. IPCC: major findings

  9. IPCC: radiative forcings

  10. IPCC: radiative forcings • What is the IPCC definition of radiative forcing? • Sensitivity parameter

  11. IPCC: Global warming potential

  12. IPCC: Global warming potential

  13. IPCC: Global warming potential

  14. IPCC: Global warming potential

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