<p>Here is the chart:
<a href="https://i.sstatic.net/lSTmN.jpg" rel="nofollow noreferrer"><img src="https://i.sstatic.net/lSTmN.jpg" alt="Chart"></a></p>

<p>My questions are:</p>

<ul>
<li><p>Is the atmosphere in equilibrium over this record?</p></li>
<li><p>how would I determine what the maximum and minimum values for each
record is (approximation).</p></li>
<li><p>Is there a correlation between records for CO2, CH4 and temperature?</p></li>
<li><p>Are today's values within the normal range of variability for this record?</p></li>
</ul>

<p>Thank you</p>

CC BY-SA 3.0
2018-04-13T11:58:48.420Z
Do you have the original data or are you digitizing?
arkaia
CC BY-SA 3.0
2018-04-13T12:00:03.380Z
@arkaia I suppose digitizing. All I have is the graph.
yre
CC BY-SA 3.0
2018-04-13T12:43:23.003Z
If you digitize, then you have the answer to questions 2 and 3
arkaia
CC BY-SA 3.0
2018-04-13T13:28:08.970Z
@arkaia what do you mean by digitize?
yre
CC BY-SA 3.0
2018-04-13T13:36:43.653Z
@arkaia I want to know if the atmosphere in this chart is in equilibrium, such as is it periodic, like at natural equilibrium to a fixed position, or is in not in equilibrium because maybe there a forcing at play and if so what is it?
yre
CC BY-SA 3.0
2018-04-13T13:40:07.860Z
@arkaia what I am trying to understand is how do you know it is out of equilibrium from the above graph?
yre
CC BY-SA 3.0
2018-04-13T13:41:10.170Z
@arkaia also I know that todays value is at depth 0 in the chart, so how might I compare the two, are today's values within the normal range of variability for this record?
yre
CC BY-SA 3.0
2018-04-13T13:45:47.857Z
@arkaia can you tell me if this is correct for the max's and min's? CO2 : MAX:280, MIN:200.....CH4: MAX: 700, MIN: <400. Did I make a mistake there?
yre
CC BY-SA 3.0
2018-04-13T15:22:48.017Z
Those might be approximate values, but you can digitize the figure and then you will know the min/max, the correlation and the trend. Without that, you are just eyeballing it
arkaia
CC BY-SA 3.0
2018-04-13T15:26:26.337Z
@arkaia for what I am doing it is okay to eye-ball it. I just want to make sure I am eye-balling it correctly.
yre
CC BY-SA 3.0
2018-04-13T15:26:48.463Z
@arkaia does the rest of the information I stated seem correct to you?
yre
CC BY-SA 3.0
2018-04-13T15:48:19.520Z
calculating the trend to see if it is stationary from the figure could lead to huge errors!
arkaia
<atmosphere><climate-change><atmospheric-chemistry><co2>
How to analyze this data showing atomospheric CO2, CH4 and tempertures obtain from an ice sample?
yre
# How to analyze this data showing atomospheric CO2, CH4 and tempertures obtain from an ice sample?

(Asked by: username_0 on 2018-04-13)

Here is the chart:
[![Chart](https://i.sstatic.net/lSTmN.jpg)](https://i.sstatic.net/lSTmN.jpg)

My questions are:

* Is the atmosphere in equilibrium over this record?
* how would I determine what the maximum and minimum values for each
  record is (approximation).
* Is there a correlation between records for CO2, CH4 and temperature?
* Are today's values within the normal range of variability for this record?

Thank you

**Tags:** atmosphere, climate-change, atmospheric-chemistry, co2

> **Comments:**
> **username_1**: Do you have the original data or are you digitizing?  
> **username_0**: @username_1 I suppose digitizing. All I have is the graph.  
> **username_1**: If you digitize, then you have the answer to questions 2 and 3  
> **username_0**: @username_1 what do you mean by digitize?  
> **username_0**: @username_1 I want to know if the atmosphere in this chart is in equilibrium, such as is it periodic, like at natural equilibrium to a fixed position, or is in not in equilibrium because maybe there a forcing at play and if so what is it?  
> **username_0**: @username_1 what I am trying to understand is how do you know it is out of equilibrium from the above graph?  
> **username_0**: @username_1 also I know that todays value is at depth 0 in the chart, so how might I compare the two, are today's values within the normal range of variability for this record?  
> **username_0**: @username_1 can you tell me if this is correct for the max's and min's? CO2 : MAX:280, MIN:200.....CH4: MAX: 700, MIN: <400. Did I make a mistake there?  
> **username_1**: Those might be approximate values, but you can digitize the figure and then you will know the min/max, the correlation and the trend. Without that, you are just eyeballing it  
> **username_0**: @username_1 for what I am doing it is okay to eye-ball it. I just want to make sure I am eye-balling it correctly.  
> **username_0**: @username_1 does the rest of the information I stated seem correct to you?  
> **username_1**: calculating the trend to see if it is stationary from the figure could lead to huge errors!  

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## 0 answers

