Natural Climate Changes

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Presentation transcript:

Natural Climate Changes

Instructions Label page Natural Climate Change Copy the text highlighted in YELLOW Follow directions and copy text on the page listed on each slide

Climate changes Earth is constantly changing, including the climate. Natural processes Human impacts

Long Term Climate Change 77 Ice Ages-Periods of extensive glacial cover The last ice age ended about 10,000 years ago (Pleistocene) Ice ages have occurred due to changes in Earth’s tilt/axis

Volcanic eruptions 77 Volcanoes release large amounts of gas and ashes Majority of the gases emitted include: water vapor, CO2, sulfur dioxide (SO2) Clouds can block out the sun’s radiation and cause a cooling of Earth (Year With No Summer)

Volcanic eruption affect on climate

El Niño 79 El Niño – Is a period where the Eastern Pacific Ocean gets warmer while the Western Pacific gets cooler Trade winds delivering warm water to the west die down The Eastern Pacific Ocean will have a pressure decrease  More rainfall The Western Pacific Ocean will have a pressure increase  Less rainfall

La Niña 79 La Niña – Period where temperatures in the Eastern Pacific Ocean cool down Caused when Trade Winds strengthen blowing warm water to the west causing cold water to pile up in the East The Eastern Pacific Ocean will have a pressure increase  Less rainfall The Western Pacific Ocean will have a pressure decrease  More rainfall

Solar Activity 81 When the sun is most active – contains sunspots (dark spots) on the sun (more solar radiation) Increase in number of sun spots – temperatures in North America and Europe increase

Short Term Changes In Climate 81 Seasons are short term periods of climate change Exist because Earth is tilted on its axis Some areas of the world get more direct heat

Causes of Climate Change 81 Changes in Earth’s Orbit Every 100,000 years Earth’s orbit becomes more elliptical Changes in Earth’s Axis-Every 41,000 years Earth’s tilt changes from 22.1 degrees to 24.5 degrees

L Cooler weather and drought Trade winds strengthen Wetter than usual weather Cooler weather and drought L Cooler weather and drought Warmer weather and wet conditions Trade winds strengthen

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