c02exercise
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School
Rutgers University *
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Course
101
Subject
Geography
Date
Dec 6, 2023
Type
docx
Pages
3
Uploaded by AgentStrawQuail34
Name:
This exercise is to familiarize you with atmospheric CO
2
variations. The scale is in parts per
million (ppm).
In the figure below, CO
2
variations over the past 800,000 years are presented in
the red curve.
The climate states are represented by the
δ
18
O record shown in the blue curve
below.
I have interpreted it for you.
The lower values represent warm interglacial times and the
higher values are colder glacial intervals.
I marked the last glacial maximum for reference.
PLEASE NOTE THAT THE AXIS for the
δ
18
O RECORD IS REVERSED.
1. During this interval, what is the range in CO
2
variability (within 10 ppm)?
2. By comparing the two graphs, briefly describe the relationship between climate state and CO
2
values.
Part 2. The graph below shows the instrumental measurements of CO
2
from Mauna Loa (Hawaii)
since 1958.
3. How much has CO
2
increased during the past 60 years?
4. What is the average rate of CO2 increase per year?
5. Compare the rates of CO
2
change from 1960 to 1970 vs the most recent decade of 2010 to
2020.
Part 3.
The graph below is a blow up of the data in the previous graph, showing the data from
January of 2015 to October of 2020.
FYI – the current value is 414 ppm.
You can see that there
is an annual cycle.
EC. Considering the photosynthesis-respiration equation and hemispheric distribution of
landmasses, explain why you might expect to see an annual cycle.
Part of the annual cycle is
natural (non-anthropogenic) and part of it is emphasized by humans (anthropogenic).
6CO
2
+ 6H
2
O
C
⬄
6
H
12
O
6
+ 6O
2
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