The atmosphere will not return to pre-industrial levels even tens of thousands of years into the future. Then, have students compare their answers to a partner.
Point out the small circle on the right side of the image that shows the time of year. Point out that the Mauna Loa data does not fluctuate as much because the readings are taken on top of a mountain that is surrounded by ocean, so the signals from the plants both releasing and taking in CO2 do not impact the reading as dramatically.
Looking ahead, if the rate of fossil-fuel burning continues to rise on a business-as-usual trajectory, such that humanity exhausts the reserves over the next few centuries, CO2 will continue to rise to levels of order ppm.
Have students look at their ideas in the cause and effect columns and discuss unanswered questions they have about the CO2 data sets with a partner or group.
In this Lesson, they will examine more closely why and how CO2 levels are increasing. Give students minutes to review their ideas from Lesson 2. Have students update the generalizability columns with the new information they have gained about how the air circulates in the northern hemisphere.
Ask students to look at their 4. Then, afterwards, have students explain what they were seeing. Tell students at this point, they are just sharing initial ideas about the data in the Keeling Curve, and that they will have a chance throughout the unit to change their ideas about the Keeling Curve.
Global atmospheric circulation video: The CO2 measurements, he argued, were important enough that at one spot on the Earth, two parallel sets of measurements were justified. Ask for ideas about the upward trend. They may still be uncertain about what the two different lines in the graph mean and represent, and what causes the patterns.
The Mauna Loa record can now be placed in the context of the variations in CO2 over the pastyears, based on reconstructions from polar ice cores. During ice ages, the CO2 levels were around ppm, and during the warmer interglacial periods, the levels were around ppm.
In the case of the Scripps Institution of Oceanography CO2 program, specific advantages can be cited.
Point out that this is the seasonal cycle. The program was rescued by DOE, but was never on a very secure footing and was subject to occasionally bizarre requirements, such as a "mandated convergence" with NOAA and a requirement that new discoveries be made based on the records at a pace of 2 per year.killarney10mile.com updated 12/28/10 Mauna Loa Student Worksheet 2 Just%at%this%time,%however,%planning%was%underway%for%an%International%Geophysical%Year.
Use Assessing the Upward Trend Worksheet to monitor students’ ideas about the upward trend in the Keeling Curve. If they are still struggling to understand the cause of the upward trend (increasing uses of fossil fuels in the atmosphere), you may want to discuss the worksheet responses as a class.
15 Keeling curve worksheet What’s the CO2 Trend? Explaining the Keeling Curve This is a famous graph called the Keeling Curve. A scientist named Charles Keeling originally created this graph.
Starting in the s, Keeling studied levels of carbon dioxide in the atmosphere at Mauna Loa scientific observatory in Hawaii. Chapter 15/16 Worksheet Problem ( #2) 1) HOCl OCl- + H+ Hypochlorous acid, HOCl, is a weak acid commonly used as a bleaching agent.
The acid-dissociation constant, Ka for the reaction represented above is x Keeling Curve Lessons Lessons for long-term earth observations. Charles David Keeling directed a program to measure the concentrations of CO 2 in the atmosphere that continued without interruption from the late 's through the present.
This program, operated out of Scripps Institution of Oceanography, is responsible for the Mauna Loa. The Scripps CO2 measurements at Mauna Loa have been supported for many years by the U.S. Department of Energy (DOE), and have more recently been supplemented by Earth Networks, a technology company that is collaborating with Scripps to expand the global GHG monitoring killarney10mile.comt for website development was provided in part .Download