Year 12s: what will be the first way you research your future options? >>

how to measure long term climate change and the method

Hey can you please answer my question ASAP but i dont need the answer about pollen or ice cores as I already know them. i just need one other way and the method :smile:

Reply 1

wartortle

I remember doing a similar thing,
I think the third way is tree rings
- A truck of a cut tree show rings; these rings show how much the tree grows each year, I think the more Co2 in the atmosphere means more growth.

Reply 2

Pastaferian

Original post by efjbrfbv

Hey can you please answer my question ASAP but i dont need the answer about pollen or ice cores as I already know them. i just need one other way and the method :smile:

Off the top of my head...

•

The ratio of oxygen isotopes (18O/16O) in calcite can be used to estimate ocean temperature in the distant past

•

Glacial moraines (which mark the furthest extent of an ice age) can contain materials which can be dated

•

The distributions of (eg) beetle remains can be used as a proxy to show how climate changed in a given location (similar to the pollen method)

•

Ancient shorelines and sea levels can be assessed by a variety of means

•

Some rocks found on the seabed can only be explained by having been dropped by melting icebergs which were previously part of a glacier. The distribution of such rocks can be used to estimate the extent of ice coverage over time.

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