In the final unit of the module, students will synthesize their understanding of climate science and modes of communication. Students are assigned to groups and given a climate change issue that they will use to demonstrate their understanding of ethos, pathos, and logos, when presented with a variety of audiences. The module summative assessment is designed to be administered after this unit.

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In this unit, students will learn about the dynamic movement of nutrients among and within ecosystems primarily through the reading and discussion of scientific literature. This unit is generally subdivided into three sections: (1) allochthonous inputs (2) the role of organisms in biogeochemical cycles and how ecological theory can be applied to biogeochemistry and (3) how biogeochemical processes can assist in creating solutions for humanity's grand challenges. This unit is designed to provide students with the opportunity to develop their reading and interpretation of scientific literature. Students will also become familiar with the utility of isotopic techniques and their use in biogeochemistry through readings and data analysis of carbon and nitrogen isotopic data sets. Chosen scientific articles are provided, each with their own set of reading questions. Additionally, short introductory materials are provided to introduce students to some of the general concepts and processes in the study of biogeochemistry.

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In this week-long unit students will explore Critical Zone function and dynamics as they relate to nutrient cycling in agricultural systems and nutrient pollution into aquatic systems. This unit is generally subdivided into three sections: (1) nutrient pollution (2) agricultural importance and (3) Critical Zone function and dynamics in relation to nutrient cycling. The students will use data sets, interactive activities, primary literature, and videos to allow them to examine the role that the CZ plays and how that role changes with differing land uses. Important present-day topics of food production, clean water, nutrient pollution, and sustainable agriculture are examined using a CZ lens. Students will interact with each other on a variety of scales (individual, small groups, entire class) and using a variety of modes (presentations, written reports, question and answers, and class discussion) in this unit. Additionally, optional activities are provided if lab activities are able to be accommodated. The unit ends with a summative assessment assignment that is based on an innovative call for proposals to combat one of America's most widespread, costly, and challenging environmental problems: nutrient pollution.

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Students select their own set of three stations in an area of interest to them, conduct a strain analysis of the area between the stations, and tie the findings to regional tectonics and societal impacts in a 5 -- 7 minute class presentation. For many students this is their first foray into "research" and can be a powerfully eye-opening and exciting (if intimidating) experience. In larger classes, students can work in pairs to shorten total time needed for presentations. Unit 6, along with exam question/s, is the Summative Assessment for the module.

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Online-ready: The exercise is a final project that can be done remotely, individually or in small online groups. Final presentations could be done in a synchronous class period.

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This unit is the module's capstone project: developing a conceptual model of the climatic and societal effects of a catastrophic volcanic eruption occurring in modern times. Through independent research and in-class collaboration, students explore the climatic and societal effects of past volcanic eruption events. Students are then introduced to the large Toba eruption event, review concept maps, concept sketches, and system diagrams, and are are given examples and guidelines for conceptual model design. Students complete their written summary outside of class.

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For a given region, students will use what they have learned about the interdisciplinary problem of soil sustainability to make recommendations for agricultural practices in response to potential changes in climate. Students will present their findings in a fact sheet that describes best practices for mitigating potential changes while remaining sensitive to stakeholder concerns and feasibility. Finally, students will complete a final personal reflection on their own learning.

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In this unit, students address the issue of groundwater demands and environmental justice in the arid Southwest, a region with some of the largest percentages of Hispanics and Latinos in the United States. Students discuss the Rule of Capture, the overuse of water resources, and the dwindling supply of groundwater in many parts of the Ogallala Aquifer. Students connect groundwater's role to the hydrological cycle and consider how issues of inequity can occur when groundwater is not properly regulated.

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Students will utilize the desert Southwest region of the United States and the Ogallala Aquifer in a case study to evaluate issues regarding groundwater and its scarcity. Groundwater is often seen as a limitless resource in the Southwest since there is little regulation controlling the amount that is withdrawn (Rule of Capture). This mentality has led to overuse and to the dwindling supply of groundwater in many parts of the Ogallala Aquifer. This module will help students connect groundwater's role in the hydrological cycle to issues of inequity that can occur when groundwater is not properly regulated.

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In this two-day activity, students monitor a simulated evolving volcanic crisis at a convergent plate boundary (Cascadia). Using monitoring data and geologic hazard maps, students make a series of forecasts for the impending eruption and associated risks. By the end of the activity, students will have learned the outcome of the eruption and assess the impacts of the eruption of Mount Rainier on specific locations around the volcano.
This unit is a continuation of Unit 5, in which students analyzed simulated pre-eruption seismic, tilt, and gas emission data. In this, the second day of the simulation, students update their eruption forecasts based on new data (in the prework) and then (in groups in class) by combining information from multiple data sets. In class, each group assesses the vulnerability of one or more assigned locations near Mount Rainier. The exercise culminates with students assessing the impacts of the simulated eruption at their assigned locations.

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In this unit, students will review mock proposals that deal with some aspect of the role of carbon in the environment. Each proposal is based on actual actions proposed to mitigate some aspect of carbon consumption and/or climate change, and as such are considered "real world" scenarios (although somewhat generalized for this exercise). Students will review each proposal for the possible societal, economic, and moral implications if the proposal was pursued on a large scale -- for instance, by a single nation or collection of countries. Additionally, students will make recommendations to a fictitious governmental panel on the merits and pitfalls of each proposal and provide well-supported recommendations about whether that government panel should pursue or reject the proposal. Instructors can use this unit as a stand-alone activity, or as a summary activity to comprehensively review, discuss, and assess material presented in this module's earlier units.

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Students are introduced to the concept of geoengineering, "the deliberate large-scale intervention in the Earth's climate system, in order to moderate global warming" (The Royal Society). The goal is for them to leverage their acquired knowledge from previous units in physical oceanography, ocean chemistry, biodiversity, and ecosystem ecology to evaluate the validity and/or the risk of geoengineering (systems thinking). Current and future generations will be required to make informed decisions on whether they support strategies that result in irreversible changes in Earth's carbon cycle.

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Students watch a video and read about past evacuations, including a premature or unnecessary evacuation, a late or botched evacuation, and about people determined to stay put no matter what. Students participate in a role-playing exercise about making the decision to evacuate in the face of uncertain predictions.

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Unit 6 covers the preliminary design of a rainwater harvesting unit. Pre-class assignments provide background on rainwater harvesting. An active learning exercise steps student teams through the process of sizing a rainwater harvesting cistern, using water demand estimates from Units 4 and 5. The activity leads into a revision of the water system mind map developed in previous units.

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Unit 6 provides an opportunity for students to present their action plans and exchange knowledge about what they have learned in their team case study work. This unit builds on food security and Earth system science covered in the first three units. It can be taught in any course discussing food security or it can be modified to fit a variety of courses of in the sciences and social sciences. The activities included in this unit are appropriate for introductory-level college students or as a basis for more in-depth class discussions on food security for upper-level students.

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This in-class exercise is an alternative to standard review sessions and models the systems thinking students need to do when working on complex, interdisciplinary issues. Students quiz each other on course material and then find authentic (and often creative) connections between seemingly disparate topics in the course. This approach challenges students to use holistic thinking when reviewing, and can be readily customized for any course.

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Humans are agents of change in the Critical Zone. This unit focuses on the land/water connection and on how human-induced land use change affects local hydrology. Students will apply what they learned in the previous Hydrology Module about how hydrologists use data (land-cover type, soil texture, and slope) to predict the amount and destination of water as it moves through a built environment. Students will use the Generic Model from the Model My WatershedR application to evaluate the impact of human alterations to the landscape and will also investigate how best-management practices can lesson those impacts. While doing so, students will also be asked to consider impacts to society both from the increased runoff and from some mitigation measures.

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Humans not only reside in the Critical Zone, they depend upon the land and water to provide sustenance. This unit will examine how humans affect soil resources and ecosystem services in the Critical Zone through food production. In addition, it will discuss farming practices that led to the Dust Bowl in the 1930s. Finally, it will examine emerging efforts to grow food locally such as Community Supported Agriculture (CSAs) and urban gardening programs.

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Peer review is an important process in determining priorities for scientific research. Students will participate in a panel review of proposals for new CZOs and as a class decide on the proposal most worthy of funding. Students will read proposals, craft a detailed review of the merits and limitations of the proposal, and then discuss the proposals during an in-class panel review. Proposals will be evaluated on how well the proposed CZO would help address global challenges and advance Critical Zone science and require students to use knowledge gained in previous modules to assess and communicate which proposals meet these goals.

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Unit 7 continues the use of the CME Building Case Study to explore water sustainability in the context of a building. The activity is extended to the catchment level, and a new tool for catchment level storm water management is introduced. Students are exposed in the pre-class assignments to low impact development (LID) and green infrastructure and the EPA National Stormwater Calculator. In class, the central activity is applying the EPA National Stormwater Calculator to evaluate an LID control plan for the CME building case study. The unit brings together concepts from previous units through the use of the calculator. The impact of landscapes, buildings, and other features on storm water runoff is illustrated. And the potential benefit of LID controls is analyzed. The homework assignment engages students in the search for a local green infrastructure site to take a picture and summarize the site in the context of a sustainable site.

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Picture of urban flooding

Provenance: Timothy Swinson https://commons.wikimedia.org/wiki/File:Trapped_woman_on_a_car_roof_during_flash_flooding_in_Toowoomba_2.jpg
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Unit 8 covers the basics of hydroclimatic extreme events with a focus on floods and droughts. Topics include introduction to floods and droughts, impact of urbanization on extremes, how to understand and predict extremes, how to tackle them (management strategies), and elements of urban climate resilience. The teaching strategy is designed with short and divided lectures filled with discussion questions and a group activity. Students will be working with time series flow data for statistical analysis of extreme events.

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