Course: Weather and climate

Country: Canada

Answer the question

Links: Mauna Loa Observatory -https://gml.noaa.gov/ccgg/trends/

IPCC Assesment:https://eos.org/articles/what-five-graphs-from-the-u-n-climate-report-reveal-about-our-path-to-halting-climate-change

- Regarding paleoclimatological data that includes measurements of [CO2] for at least the past 100,000 years.
- Obtain and identify the source of this data. Share a view of the data in your submission.
- Briefly, how are [CO2] measurements extracted from the data?
- From the data, estimate the minimum, maximum, and average values [CO2] over a time interval of your choosing that is covered by the data.
- Based upon the average value, estimate the [CO2] in 2022 (present) and 2100 (future).

- RegardingMauna Loa Observatory data for the [CO2] at present and in ‘recent’ past.
- State the current value for [CO2]. Convert this value to a percentage.
- Qualify the proportion of Earth’s atmosphere that is [CO2] in relative terms. (Feel free to introduce an analogy, for example – other than one based on counting Smarties!)
- What does your intuition suggest about this proportion in the context of climate change? Why?
- Using one of the Keeling Curves:
- Estimate the current value for the [CO2].
- Choose a time in the past that is covered by the curve and estimate [CO2].
- Using your past and present estimates for the [CO2], estimate the growth rate for this gas in our atmosphere.
- Based on this growth rate, estimate [CO2] in 2100.

- Regarding the AGU’s selection offive graphs from the recent IPCC assessment (AR6):
- Using the first graph from point 5 on “Carbon Extraction”:
- Estimate the [CO2] in 2100.
- How does this estimate (Question 3, Part 1) compare with your projections from the distant past (Question 1, Part 4) and present (Question 2, Part 4, Point 4)?

- Choose one of the emissions scenarios depicted in the point 4 graph:
- Using your own words, explain what is being measured on the vertical axis of this figure.
- Relative to today, quantify the percentage change by 2100 for the scenario you chose.
- Provide a simplified process-flow diagram that captures this result.

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