Global climate change

900-year Northeast U.S. climate record revealed

By Brett Anderson, AccuWeather senior meteorologist
1/15/2019, 1:12:10 PM

Geoscientists from the University of Massachusetts have reconstructed the longest and highest resolution climate record for the northeastern United States.

The research team studied sediment samples from the bottom of a deep lake in central Maine. The sediment samples contained chemical compounds that can provide an independent terrestrial paleo-thermometer that accurately assesses past temperature variability.

What did the study find?

1. The warmth of the medieval period was evident.

2. An overall cooling trend after the medieval period lasted until the 1900s.

3. The Little Ice Age was indicated in the 1800s.

4. To the surprise of the researchers, there were numerous 10- & 50- to 60-year temperature cycles.

5. The period from 1100 to 1300 was warm and mostly dry, but with no major fire events. However, the 1300 to 1700 period was also dry, but not that warm with a total of three fire events. Based on this data, temperatures seem to have little influence on fire events in the study location.

The views expressed are those of the author and not necessarily those of AccuWeather, Inc. or AccuWeather.com

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Global climate change