Modeling Earth's Energy Balance

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Modeling Earth's Energy Balance
https://serc.carleton.edu/NAGTWorkshops/complexsystems/activities/energy_balance_model.html

Kirsten Menking, Vassar College , Kirsten Menking, On the Cutting Edge/SERC

In this activity, learners use the STELLA box modeling software to determine Earth's temperature based on incoming solar radiation and outgoing terrestrial radiation. Starting with a simple black body model, the exercise gradually adds complexity by incorporating albedo, then a 1-layer atmosphere, then a 2-layer atmosphere, and finally a complex atmosphere with latent and sensible heat fluxes. With each step, students compare the modeled surface temperature to Earth's actual surface temperature, thereby providing a check on how well each increasingly complex model captures the physics of the actual system.

Activity takes about two lab periods plus homework assignment. Access to STELLA modeling software is required, but a free trial version is available.

Learn more about Teaching Climate Literacy and Energy Awareness»

See how this Activity supports the Next Generation Science Standards»

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High School

Performance Expectations: 1

HS-PS3-1: Create a computational model to calculate the change in the energy of one component in a system when the change in energy of the other component(s) and energy flows in and out of the system are known.

Disciplinary Core Ideas: 3

HS-ESS2.D1: The foundation for Earth’s global climate systems is the electromagnetic radiation from the sun, as well as its reflection, absorption, storage, and redistribution among the atmosphere, ocean, and land systems, and this energy’s re-radiation into space.

HS-PS3.B2: Energy cannot be created or destroyed, but it can be transported from one place to another and transferred between systems

HS-PS4.B2: When light or longer wavelength electromagnetic radiation is absorbed in matter, it is generally converted into thermal energy (heat). Shorter wavelength electromagnetic radiation (ultraviolet, X-rays, gamma rays) can ionize atoms and cause damage to living cells

Cross Cutting Concepts: 8

Patterns, Cause and effect, Scale, Proportion and Quantity, Systems and System Models, Energy and Matter, Stability and Change

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Patterns, Cause and effect, Scale, Proportion and Quantity, Systems and System Models, Energy and Matter, Stability and Change

HS-C1.4: Mathematical representations are needed to identify some patterns

HS-C2.4: Changes in systems may have various causes that may not have equal effects.

HS-C3.5: Algebraic thinking is used to examine scientific data and predict the effect of a change in one variable on another (e.g., linear growth vs. exponential growth).

HS-C4.2: When investigating or describing a system, the boundaries and initial conditions of the system need to be defined and their inputs and outputs analyzed and described using models.

HS-C4.3: Models (e.g., physical, mathematical, computer models) can be used to simulate systems and interactions—including energy, matter, and information flows—within and between systems at different scales.

HS-C5.2: Changes of energy and matter in a system can be described in terms of energy and matter flows into, out of, and within that system.

HS-C5.3: Energy cannot be created or destroyed—only moves between one place and another place, between objects and/or fields, or between systems.

HS-C7.3: Feedback (negative or positive) can stabilize or destabilize a system.

Science and Engineering Practices: 8

Asking Questions and Defining Problems, Developing and Using Models, Planning and Carrying Out Investigations, Analyzing and Interpreting Data, Using Mathematics and Computational Thinking, Constructing Explanations and Designing Solutions, Obtaining, Evaluating, and Communicating Information

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HS-P1.2: ask questions that arise from examining models or a theory, to clarify and/or seek additional information and relationships.

HS-P2.6: Develop and/or use a model (including mathematical and computational) to generate data to support explanations, predict phenomena, analyze systems, and/or solve problems.

HS-P3.1: Plan an investigation or test a design individually and collaboratively to produce data to serve as the basis for evidence as part of building and revising models, supporting explanations for phenomena, or testing solutions to problems. Consider possible confounding variables or effects and evaluate the investigation’s design to ensure variables are controlled.

HS-P4.1: Analyze data using tools, technologies, and/or models (e.g., computational, mathematical) in order to make valid and reliable scientific claims or determine an optimal design solution.

HS-P5.4: Use simple limit cases to test mathematical expressions, computer programs, algorithms, or simulations of a process or system to see if a model “makes sense” by comparing the outcomes with what is known about the real world.

HS-P6.4: Apply scientific reasoning, theory, and/or models to link evidence to the claims to assess the extent to which the reasoning and data support the explanation or conclusion.

HS-P8.2: Compare, integrate and evaluate sources of information presented in different media or formats (e.g., visually, quantitatively) as well as in words in order to address a scientific question or solve a problem.

HS-P8.5: Communicate scientific and/or technical information or ideas (e.g. about phenomena and/or the process of development and the design and performance of a proposed process or system) in multiple formats (i.e., orally, graphically, textually, mathematically).

Climate Literacy

This Activity builds on the following concepts of Climate Literacy.

Click a topic below for supporting information, teaching ideas, and sample activities.

Energy Literacy

This Activity builds on the following concepts of Energy Literacy.

Click a topic below for supporting information, teaching ideas, and sample activities.

Excellence in Environmental Education Guidelines

1. Questioning, Analysis and Interpretation Skills:G) Drawing conclusions and developing explanations
Other materials addressing:
G) Drawing conclusions and developing explanations.

1. Questioning, Analysis and Interpretation Skills:B) Designing investigations
Other materials addressing:
B) Designing investigations.

1. Questioning, Analysis and Interpretation Skills:C) Collecting information
Other materials addressing:
C) Collecting information.

1. Questioning, Analysis and Interpretation Skills:F) Working with models and simulations
Other materials addressing:
F) Working with models and simulations.

2. Knowledge of Environmental Processes and Systems:2.1 The Earth as a Physical System:A) Processes that shape the Earth
Other materials addressing:
A) Processes that shape the Earth.

2. Knowledge of Environmental Processes and Systems:2.1 The Earth as a Physical System:C) Energy
Other materials addressing:
C) Energy.

Notes From Our Reviewers The CLEAN collection is hand-picked and rigorously reviewed for scientific accuracy and classroom effectiveness. Read what our review team had to say about this resource below or learn more about how CLEAN reviews teaching materials
Teaching Tips | Science | Pedagogy | Technical Details

Teaching Tips

This is an upper-level activity. As such, it requires some prerequisite knowledge of modeling. Familiarity with STELLA modeling software would also be helpful.

About the Content

Background readings for students are not available in digital form, but the reference is provided.
Step-by-step instructions will help students learn about the dynamics of the atmosphere and appreciate the complexity of Earth's energy balance.
Comment from expert scientist: The main strength is in starting with a highly idealized system and then incrementally adding complexity towards a model that looks more like the real world. This stepwise process will enable students to grasp the basics and then to understand the roles of additional processes in Earth's energy budget.

About the Pedagogy

Use of STELLA model is engaging for students. Students need to be savvy in modeling in order to complete this activity.
Grouping students with different knowledge of modeling together will likely help the students with less familiarity to complete the activity.
Students need to have sufficient quantitative skills to be able to master this activity.

This resource engages students in using scientific data.
See other data-rich activities

Technical Details/Ease of Use

STELLA software full license can be pricey but a free trial version is available.
Students work with STELLA box modeling software - no instructions to using the software are included in the activity but can be found here: http://www.iseesystems.com/softwares/Education/StellaSoftware.aspx

Entered the Collection: November 2012 Last Reviewed: April 2016

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High School (see details)

High School

Performance Expectations: 1

Disciplinary Core Ideas: 3

Cross Cutting Concepts: 8

Science and Engineering Practices: 8

Grade Level

Online Readiness

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