Climate Change Evidence Flashcards
1
Q
climate change
A
significant, long lasting changes of global temperatures and weather patterns
2
Q
since when has there been an increased change in climate?
A
past 200 years, especially since 1970
3
Q
extent of sea ice
A
satellites show 50% less sea ice than 50 years ago
4
Q
high glaciers melting since 1850s
A
rate of glacial retreat, photos
5
Q
observing patterns since 1850s
A
temperature records
6
Q
dendrochronology
A
dates back 10,000 years and gives indication of wetness + warmth per year
7
Q
ice cores
A
900,000 years of trapped gas, increased CO2 levels past 650,000 years
8
Q
sediment cores
A
drilling into sediment for pollen
