Climate Change

Introduction to Extreme Weather Events

  • In late winter 2019, 14 US states from North Dakota to Louisiana experienced historic flooding, typically associated with spring.

  • The individual sharing this experience reports losing everything due to the flooding.

  • Following the floods, a severe winter storm impacted high plains, causing deep snow and stranding both people and livestock.

Sequence of Extreme Weather

  • The timeline continues with an April-May tornado outbreak in the central plains, resulting in over 500 tornadoes, 13 fatalities, and widespread destruction from Texas to Iowa.

  • This sequence of events raises concerns regarding the increasing frequency and severity of extreme weather changes.

Climate Change and Its Impact

  • The question of whether these events are caused by climate change looms large among communities.

  • The narrative emphasizes that climate change affects not only weather but also food, water systems, health, economy, infrastructure, and lifestyle.

  • Climate change is portrayed as a current reality rather than a future concern.

Scientific Consensus on Global Warming

  • Within the scientific community, there is a unanimous agreement that the planet is experiencing warming, a fact that cannot be disputed.

  • Historical data collection began to improve significantly around 1950, aided by satellite technology allowing for comprehensive global measurements.

Evidence of Rising Temperatures

  • Data shows consistent evidence of global warming:

    • 2018 was recorded as Earth's 4th warmest year after 2015, 2016, and 2017.

    • Nine of the ten warmest years since 1880 occurred after 2005.

    • Projections suggest that 2019 could rank among the top three warmest years on record.

Effects of Global Warming on Weather Patterns

  • Rising heat levels lead to:

    • Increased temperatures overall.

    • Longer-lasting heat waves that are more intense and frequent.

  • Global warming is also linked to:

    • An increase in extreme rainfall events noted globally, even in arid regions.

    • The correlation between a water-dominated world and increased evaporation, leading to heavier rainfall during events.

Historical Context of Climate Science

  • The discussion highlights John Tyndall's work in 1859, laying the groundwork for understanding atmospheric effects and global warming.