1. Lab 2: Global Average Temperature PART THREE

3. TABLE 1
Year before eruption
(Y-1)
Year of eruption
(Y)
Year after eruption
(Y+1)
Two years after eruption
(Y+2)
Three years after eruption
(Y+3)
Pinatubo (1991)
14.38
14.35
14.13
14.14
14.24
Volcano 2 …
Volcano 3

4. What’s the pattern here? Remember to include the sign!
TABLE 1
Year before eruption
(Y-1)
Year of eruption
(Y)
Year after eruption
(Y+1)
Two years after eruption
(Y+2)
Three years after eruption
(Y+3)
Pinatubo (1991)
14.38
14.35
14.13
14.14
14.24
TABLE 2
Y-(Y-1)
(Y+1)-Y
(Y+2)-(Y+1)
(Y+3)-(Y+2)
Pinatubo (1991) =
-0.03 =
-0.22
= 0.01 =
0.10
Volcano 2 …
Volcano 3

6. Again, what is the pattern?
Use a table similar to Tables 1 & 2, from Task 4
Keep in mind not to use years where there was both El Nino events and Volcanic eruptions!

7. Why did we just do this? What’s the point?
BOTH El Nino and volcanic eruption events can change the global average temperature!
El Nino tends to make it increase, volcanic eruptions tend to make it decrease. But these changes are always temporary.
These affect the NATURAL INTERANNUAL VARAIBILITY of Earth’s Global Average Temperature.
But how exactly do these events affect temperatures?

8. Mount Pinatubo Eruption, 1991 (Phillipines)
2nd largest volcanic eruption in the 20th century