* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Download Long-Term and Short-Term Changes in Climate
Survey
Document related concepts
History of geomagnetism wikipedia , lookup
Geomorphology wikipedia , lookup
Spherical Earth wikipedia , lookup
Physical oceanography wikipedia , lookup
Post-glacial rebound wikipedia , lookup
Age of the Earth wikipedia , lookup
History of Earth wikipedia , lookup
History of geology wikipedia , lookup
Quaternary glaciation wikipedia , lookup
Future of Earth wikipedia , lookup
Milankovitch cycles wikipedia , lookup
History of climate change science wikipedia , lookup
Transcript
Long-Term and Short-Term Changes in Climate •The Earth is 4.54 billion years old •In it’s history, there have been many natural variations to it’s climate •These change have occurred due to changes in how energy is absorbed and trapped by the Earth For example… • Ice Ages ▫ a period in Earth’s history where the Earth is colder and much of the planet is covered in ice Long-Term Changes are due to: Continental Drift • According to plate tectonics, all of the continents have been moving and are continuing to shift their position on the Earth’s surface • How it impacts climate? ▫ Changes ocean currents and wind patterns ▫ Changes how land masses are distributed which reduces the effect of local bodies of water on climate ▫ Creates mountains which affect climate Video Cycles in Climate • Long term cycles (over tens and hundreds of thousands of years) occur alternating between ice ages and warmer interglacial periods • Theories on why the climate changes: ▫ Shape of the orbit changes over time ▫ Earth’s tilt changes and wobbles Short-Term Changes are caused by: Volcanic Eruptions • When an eruption occurs, rocks, dust and gas are shot high into the atmosphere • These particles reflect the suns rays and lower the energy transmitted to the Earth Changing Ocean Currents • El Nino – a recurring change in the Pacific winds and ocean currents that brings warm, moist air and water toward South America instead of Africa Changes in the Sun’s Radiation • If the amount of radiation from the Sun drops, the Earth receives less energy and cools • Scientist’s are constantly monitoring the Sun’s energy output Homework • Pg 353 # 2, 4, 5, 7