plotting carbon dioxide

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See also: http://serc.carleton.edu/introgeo/interactive/examples/co2.html

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Page 2: Plotting Carbon Dioxide
Page 3: Plotting Carbon Dioxide

Objective of Activity:

• Students will be able to use real CO2 data to measure rates of CO2 increase over time.

Background Information:

• CO2 (Carbon Dioxide) is a trace greenhouse gas that is strongly correlated with global temperatures … the more CO2 in the atmosphere, the warmer Earth’s atmosphere and surface become because of the ability of CO2 to absorb some of Earth’s outgoing infrared radiation.

• The slope of a line in a graph is the ratio of the rise (the Y-axis) over the run (the X-axis), and has units of the rise axis over the run axis. For example, if a graph has time (hours) as the X-axis and distance (miles) as the Y-axis, then a line will have slope of miles/hour, or speed.

Page 4: Plotting Carbon Dioxide

Overview of the Activity:

• Student groups plot 8 CO2 values from Mauna Loa, HI, from 2005 to 2011 on a graph provided, using randomly selected data on next slide.

• Today you will each plot one of 38 randomly selected data points from this data set.

• As a group we will estimate the slope (rate) of the best line through our 31 data points.

• (Students calculate the # of years for CO2 levels to double at the rate they’ve found.)

• (Students learn about incomplete data.)

Page 5: Plotting Carbon Dioxide

Online Workshop 11 May 2012: Mauna Loa Atmospheric CO2 Concentrations in parts per million (ppm)

31 Groups of 8 randomly selected 2005-11 data; Source http://scrippsco2.ucsd.edu/data/in_situ_co2/monthly_mlo.csv

G = Group #; D1 = Date (M/Y) of 1st observation; V1 = Value of CO2 concentration on that date; etc.

G D1 V1 D2 V2 D3 V3 D4 V4 D5 V5 D6 V6 D7 V7 D8 V8

1 4/06 384.4 5/06 384.9 11/06 380.2 12/07 383.7 4/10 392.5 6/10 392.3 8/10 388.5 12/11 391.8

2 7/05 380.7 5/06 384.9 6/07 385.9 6/08 387.9 2/09 387.2 2/10 390.0 8/10 388.5 5/11 394.3

3 4/05 382.1 4/06 384.4 1/08 385.0 6/08 387.9 11/08 384.1 3/10 391.0 5/10 393.2 8/11 390.2

4 10/07 380.9 5/08 388.5 8/08 384.2 10/09 384.3 12/10 389.9 7/11 392.6 9/11 388.9 12/11 391.8

5 8/06 380.5 10/07 380.9 9/08 383.0 11/08 384.1 12/09 387.4 4/10 392.5 9/11 388.9 12/11 391.8

6 5/05 382.2 10/05 376.8 2/07 383.7 9/08 383.0 10/08 382.8 1/09 386.7 4/11 393.5 9/11 388.9

7 2/05 379.7 12/05 380.0 10/06 379.1 1/08 385.0 5/08 388.5 10/08 382.8 12/09 387.4 8/10 388.5

8 3/06 382.6 5/06 384.9 12/06 381.7 4/07 386.2 8/07 381.8 4/08 386.8 8/09 386.1 2/11 391.9

9 4/06 384.4 8/07 381.8 10/07 380.9 11/07 382.4 4/09 389.5 11/10 388.6 2/11 391.9 10/11 388.9

10 5/07 386.4 1/08 385.0 4/08 386.8 3/09 388.6 11/09 386.0 6/10 392.3 9/10 386.8 4/11 393.5

11 6/05 382.1 8/05 378.7 4/06 384.4 3/07 384.3 8/07 381.8 10/08 382.8 2/10 390.0 9/11 388.9

12 1/05 378.3 3/05 380.4 11/05 378.3 6/06 384.1 3/08 385.9 6/09 389.6 2/10 390.0 5/11 394.3

13 5/05 382.2 8/05 378.7 9/06 378.8 6/07 385.9 1/08 385.0 2/09 387.2 6/10 392.3 11/10 388.6

14 7/06 382.4 8/06 380.5 6/07 385.9 6/08 387.9 10/08 382.8 5/10 393.2 1/11 391.3 9/11 388.9

15 2/06 382.0 1/08 385.0 3/08 385.9 1/09 386.7 6/09 389.6 1/10 388.6 3/11 392.3 6/11 393.7

16 4/06 384.4 4/07 386.2 10/07 380.9 5/09 390.2 6/09 389.6 8/10 388.5 11/11 390.3 12/11 391.8

17 2/05 379.7 10/05 376.8 11/05 378.3 8/06 380.5 11/07 382.4 11/08 384.1 4/09 389.5 3/11 392.3

18 4/05 382.1 11/05 378.3 6/06 384.1 7/07 384.4 2/08 385.9 4/08 386.8 12/10 389.9 9/11 388.9

19 12/05 380.0 12/06 381.7 4/09 389.5 10/09 384.3 11/09 386.0 4/11 393.5 5/11 394.3 11/11 390.3

20 2/06 382.0 5/06 384.9 6/07 385.9 12/07 383.7 5/09 390.2 3/10 391.0 4/10 392.5 9/10 386.8

21 6/05 382.1 2/06 382.0 6/08 387.9 3/10 391.0 4/10 392.5 8/10 388.5 10/10 387.2 8/11 390.2

22 3/05 380.4 3/08 385.9 1/09 386.7 4/09 389.5 11/10 388.6 12/10 389.9 4/11 393.5 7/11 392.6

23 4/05 382.1 1/06 381.4 2/06 382.0 10/06 379.1 11/07 382.4 3/09 388.6 3/10 391.0 3/11 392.3

24 8/05 378.7 3/06 382.6 4/06 384.4 4/07 386.2 9/07 380.9 10/07 380.9 11/07 382.4 4/09 389.5

25 8/06 380.5 1/07 382.5 2/07 383.7 4/07 386.2 11/09 386.0 3/10 391.0 5/10 393.2 10/10 387.2

26 8/06 380.5 11/06 380.2 4/07 386.2 8/08 384.2 11/08 384.1 10/09 384.3 9/10 386.8 10/10 387.2

27 8/06 380.5 9/07 380.9 3/08 385.9 9/08 383.0 10/08 382.8 4/10 392.5 11/11 390.3 12/11 391.8

28 1/05 378.3 5/05 382.2 11/07 382.4 3/09 388.6 4/10 392.5 1/11 391.3 7/11 392.6 12/11 391.8

29 9/05 376.4 6/06 384.1 7/06 382.4 4/07 386.2 5/07 386.4 10/08 382.8 3/10 391.0 10/10 387.2

30 6/07 385.9 10/08 382.8 11/08 384.1 5/09 390.2 3/10 391.0 7/10 390.5 3/11 392.3 9/11 388.9

31 3/05 380.4 11/05 378.3 7/07 384.4 11/07 382.4 2/10 390.0 3/10 391.0 6/10 392.3 10/10 387.2

Page 6: Plotting Carbon Dioxide

July

2005

July

July

July

2006 2007 2008 2009 2010 2011 2012

July

July

July

375

377

376

378

380

386

392

391

390

389

388

387

384

383

395

382

379

381

394

385

393

CO

2C

oncentr

ation (

ppm

)

Data

Points

Slope = ______ ppm

Page 7: Plotting Carbon Dioxide

July

2005July

July

July

2006 2007 2008 2009 2010 2011 2012

July

July

July

375

377

376

378

380

386

392

391

390

389

388

387

384

383

395

382

379

381

394

385

393

CO

2C

oncentr

ation (

ppm

)

Slope = _2.2_ ppm

Group # __1__

393.4

378.0

Slope = (393.4-378.0)(2010-2003)

= 15.4/7

= 2.2

Page 8: Plotting Carbon Dioxide

Sharing your results:

• Hopefully you were able to plot your data points ….

• Did the data set we plotted look very noisy?

• Any ideas why?

• (Incomplete data …)

• Let’s look at the data sets a little more closely …

Page 9: Plotting Carbon Dioxide

375

380

385

390

395

Jan-05 Jan-06 Jan-07 Jan-08 Jan-09 Jan-10 Jan-11

Carb

on

Dio

xid

e i

n p

pm

Keeling Mauna Loa CO2 Data (2005-2011): Group 1

Page 10: Plotting Carbon Dioxide

375

380

385

390

395

Jan-05 Jan-06 Jan-07 Jan-08 Jan-09 Jan-10 Jan-11

Carb

on

Dio

xid

e i

n p

pm

Keeling Mauna Loa CO2 Data (2005-2011): Groups 1-4

Page 11: Plotting Carbon Dioxide

375

380

385

390

395

Jan-05 Jan-06 Jan-07 Jan-08 Jan-09 Jan-10 Jan-11

Carb

on

Dio

xid

e i

n p

pm

Keeling Mauna Loa CO2 Data (2005-2011): Groups 1-31

Page 12: Plotting Carbon Dioxide

375

380

385

390

395

Jan-05 Jan-06 Jan-07 Jan-08 Jan-09 Jan-10 Jan-11

Carb

on

Dio

xid

e i

n p

pm

Keeling Mauna Loa CO2 Data (2005-2011): 38 Random Points

Page 13: Plotting Carbon Dioxide

http://bluemoon.ucsd.edu/pub/cdrg/continuous/monthly_mlo.csv

300

310

320

330

340

350

360

370

380

390

400

Jan-58 Jan-68 Jan-78 Jan-88 Jan-98 Jan-08

Carb

on

Dio

xid

e i

n p

pm

Keeling Mauna Loa CO2 Data (1958-2011): All Data

Page 14: Plotting Carbon Dioxide