The graph shows that global temperatures have generally warmed over the past 2000 years with fluctuations and with two notable warm periods and one cold period.
2: Two sources of evidence for past climate change are:
- The tree rings
- The ice cores.
3: The Earth's climate is one that has changed naturally due to variations in the Earth's orbit, volcanic eruptions, and changes in ocean circulation. Also, the current warming trend is very likely caused by human activities.
What is the climate change about?
The graph above is one that shows that global temperatures have fluctuated over the past 2000 years, but with a general trend of warming. There are two kinds of warm periods: the Medieval Warm Period (MWP) from around 900 to 1300 AD, and the current warming period.
In Conclusion The graph shows that the Earth's climate has changed naturally many times over the past 2000 years. also, the current warming trend is very likely caused by human activities.
See text below
2000 Years of Global Temperatures (30-year averages, last data year 2007)
Medieval Warm Period.
(average of 18
-06
-0.8
non-tree ring proxies data years AD 1-1996)
-1
0
Vilings arrive in Greenland
1.
Describe the pattern of
UK Met Cffice &
climate change since 1 AD
U. of E. Anglia
shown in the graph. (2 marks)
(thermometers,
data years 1850-2007)
2.
Explain two sources of
evidence for past climate
change (4 marks)
3.
Assess the extent to which the
End of Viking colonization of Greenland
Little Ice Age
100 200 300 400 500 600 700 300 300 1000 1100 1200 1300 1400 1500 1600 1700 1300 1500 2000
Earth's climate has changed in
the past due to natural causes (8 marks)
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