### Sunlight and the Atmosphere --- #### Define Weather and Climate - **Weather** refers to the **short-term** atmospheric conditions at a specific time and place. - **Climate** describes the **long-term** average of those conditions over a period of typically 30 years. - Essentially, weather is what you experience daily, and climate is what you expect based on historical patterns. --- #### (optional if time) How does the reflection of sunlight impact the weather and climate on Earth? - [PhET Geometric Optics](https://phet.colorado.edu/sims/html/geometric-optics/latest/geometric-optics_all.html) - [Video: Archimedes Death Ray (MythBusters)](https://www.youtube.com/watch?v=tQBKIsrgiwE) --- ##### How much of the Sun's energy does the Earth raidate back into space? <iframe style="margin:0 auto" width="560" height="315" src="https://www.youtube-nocookie.com/embed/DxL2HoqLbyA?si=UdAh8G8aj1K8O4f7" title="YouTube video player" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share" referrerpolicy="strict-origin-when-cross-origin" allowfullscreen></iframe> --- #### Current High Pressure and Low Pressure: [https://zoom.earth/places/united-states/provo/#map=pressure/model=icon](https://zoom.earth/places/united-states/provo/#map=pressure/model=icon) --- ### Mini-Lab: micro:bit light sensor --- #### Intensity of Sun <img src="/assets/slides/sun-intensity.png" alt="Sun intensity." style="margin: 0 auto; display: block; height: 70vh;"> --- #### Intensity of Sun <img src="/assets/slides/latitude-intensity.png" alt="Intensity by latitude." style="margin: 0 auto; display: block; height: 70vh;"> --- #### Reflection by CO2 <img src="/assets/slides/greenhouse.png" alt="Greenhouse effect (reflecting sunlight back to Earth)." style="margin: 0 auto; display: block; height: 70vh;"> --- #### Reflection by Earth <img src="/assets/slides/Earth_energy_budget.svg" alt="Earth energy budget." style="margin: 0 auto; display: block; height: 70vh;">