Studying Past Climates

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Presentation transcript:

Studying Past Climates

Direct Records of Climate Recorded temperature, precipitation and climate data over the past 200 years Journals, paintings, farming records and oral histories

PROXY RECORDS Indirect records of climate Ice Core Samples- ice contains air bubbles that have been trapped for thousands of years, the ice at the top of an ice core is very recent and can be 800,000 years old at the bottom! The air bubbles show the concentration of greenhouse gases and oxygen levels in the past to help determine temperatures

Tree Rings and Coral Reefs- trees create one growth ring per year based on the growing conditions and climate. Coral Reefs also add layers of growth each year and can help determine ocean temperatures. Rock, ocean sediment and caves- layers of soil and rock build up on the Earth’s surface over time and may contain clues such as plant pollen or fossils.

Read pages 358-360 and answer questions #1-7 on page 361