2024-2025 Catalog

ENSC 13300. The Atmosphere. 100 Units.

This course introduces the physics, chemistry, and phenomenology of the Earth's atmosphere, with an emphasis on the fundamental science that underlies atmospheric behavior and climate. Topics include (1) atmospheric composition, evolution, and structure; (2) solar and terrestrial radiation in the atmospheric energy balance; (3) the role of water in determining atmospheric structure; and (4) wind systems, including the global circulation, and weather systems.

Instructor(s): T. Shaw; N. Nakamura     Terms Offered: Spring
Prerequisite(s): MATH 13100-MATH 13200
Equivalent Course(s): GEOS 13300, ENST 13300

ENSC 13400. Global Warming: Understanding the Forecast. 100 Units.

The future of human civilization depends on its ability to avoid, or adapt to, climate change associated with fossil-fuel (carbon) emissions. With so much at stake, it is important that citizens of the world understand the science which forms the foundation of what is understood about global climate change. The learning objectives of this course are to develop understanding of: (1) the historical and pre-historical records of global climate change, (2) the Earth's carbon budget, (3) how the greenhouse effect determines temperature in Earth's atmosphere and at the land and sea surface, (4) how climate projections are made, and (5) how present-day activities, both in the scientific research realm and in the socio-economic/political realm are shaping what will happen in the future. Course activity is partitioned into lectures (given by the course instructor), weekly laboratory-section activity (run by graduate teaching assistants), outside reading, and occasional homework. Assessment leading to a course grade will focus primarily on student performance in completing laboratory exercises and on a midterm and final exam. (L)

Instructor(s): D. MacAyeal     Terms Offered: Autumn
Equivalent Course(s): ENST 12300, GEOS 13400, PHSC 13400

ENSC 13410. Global Warming: Understanding the Forecast (Flipped Class) 100 Units.

This course presents the science behind the forecast of global warming to enable the student to evaluate the likelihood and potential severity of anthropogenic climate change in the coming centuries. It includes an overview of the physics of the greenhouse effect, including comparisons with Venus and Mars; predictions and reliability of climate model forecasts of the greenhouse world. This course is part of the College Course Cluster program, Climate Change, Culture, and Society. This course covers the same material as PHSC 13400, but is organized using a flipped classroom approach in order to increase student engagement and learning.

Instructor(s): D. Abbot     Terms Offered: Autumn Spring
Prerequisite(s): Some knowledge of chemistry or physics helpful.
Equivalent Course(s): ENST 13410, PHSC 13410, GEOS 13410

ENSC 21100. Energy: Science, Technology, and Human Usage. 100 Units.

This course covers the technologies by which humans appropriate energy for industrial and societal use, from steam turbines to internal combustion engines to photovoltaics. We also discuss the physics and economics of the resulting human energy system: fuel sources and relationship to energy flows in the Earth system; and modeling and simulation of energy production and use. Our goal is to provide a technical foundation for students interested in careers in the energy industry or in energy policy. Field trips required to major energy converters (e.g., coal-fired and nuclear power plants, oil refinery, biogas digester) and users (e.g., steel, fertilizer production). This course is part of the College Course Cluster program: Climate Change, Culture and Society.

Instructor(s): E. Moyer     Terms Offered: Spring
Prerequisite(s): Knowledge of physics or consent of instructor
Equivalent Course(s): ENST 24705, CEGU 24705, GEOS 34705, GEOS 24705

ENSC 23600. Chemical Oceanography. 100 Units.

This course explores the chemistry of the ocean system and its variations in space and time. The oceans play an essential role in most (bio)geochemical cycles, interacting in various ways with the atmosphere, sediments, and crust. These interactions can be understood through studying the geochemical and isotopic properties of the ocean, its inputs and outputs, and its evolution as recorded in marine sediments and sedimentary rocks. Topics include: the marine carbon cycle, nutrient cycling, chemical sediments, and hydrothermal systems.

Instructor(s): C. Blättler     Terms Offered: Spring
Prerequisite(s): Completion of one of the following Chemistry Sequences: CHEM 10100-10200-11300 Introductory General Chemistry I-II; Comprehensive General Chemistry III or CHEM 11100-11200-11300 Comprehensive General Chemistry I-II-III or CHEM 12100-12200-12300 Honors General Chemistry I-II-III AND either GEOS 13100 or GEOS 13200.
Equivalent Course(s): CHEM 23600, GEOS 23600, GEOS 33600

ENSC 23800. Global Biogeochemical Cycles. 100 Units.

This survey course covers the geochemistry of the surface of the Earth, focusing on biological and geological processes that shape the distributions of chemical species in the atmosphere, oceans, and terrestrial habitats. Budgets and cycles of carbon, nitrogen, oxygen, phosphorous, and sulfur are discussed, as well as chemical fundamentals of metabolism, weathering, acid-base and dissolution equilibria, and isotopic fractionation. The course examines the central role that life plays in maintaining the chemical disequilibria that characterize Earth's surface environments. The course also explores biogeochemical cycles change (or resist change) over time, as well as the relationships between geochemistry, biological (including human) activity, and Earth's climate.

Instructor(s): J. Waldbauer     Terms Offered: Spring
Prerequisite(s): CHEM 11100-11200 or consent of instructor
Equivalent Course(s): GEOS 23800, GEOS 33800

ENSC 23820. Biogeochemical Analysis in Terrestrial and Aquatic Ecosystems – Marine Biological Laboratory. 100 Units.

This course examines the interface of biological processes with chemical processes in ecological systems. Course content emphasizes aquatic chemistry and the role of microbes in the cycling of nitrogen, carbon, and other elements. Effects of global changes on chemical cycling are emphasized.

Instructor(s): Marine Biological Laboratory Staff.     Terms Offered: Autumn. L.
Prerequisite(s): Consent only. Admission by application to the Semester in Environmental Science program at the Marine Biological Laboratory in Woods Hole, MA; concurrent registration in BIOS 27710 and BIOS 27712 along with one of BIOS 27713, BIOS 27714 or BIOS 27715.
Note(s): E.
Equivalent Course(s): BIOS 27711

ENSC 23900. Environmental Chemistry. 100 Units.

The focus of this course is the fundamental science underlying issues of local and regional scale pollution. In particular, the lifetimes of important pollutants in the air, water, and soils are examined by considering the roles played by photochemistry, surface chemistry, biological processes, and dispersal into the surrounding environment. Specific topics include urban air quality, water quality, long-lived organic toxins, heavy metals, and indoor air pollution. Control measures are also considered. This course is part of the College Course Cluster program: Climate Change, Culture, and Society.

Instructor(s): D. Archer     Terms Offered: Autumn
Prerequisite(s): CHEM 11100-11200 or equivalent, and prior calculus course
Equivalent Course(s): GEOS 23900, ENST 23900, GEOS 33900

ENSC 24000. Geobiology. 100 Units.

Geobiology seeks to elucidate the interactions between life and its environments that have shaped the coevolution of the Earth and the biosphere. The course will explore the ways in which biological processes affect the environment and how the evolutionary trajectories of organisms have in turn been influenced by environmental change. In order to reconstruct the history of these processes, we will examine the imprints they leave on both the rock record and on the genomic makeup of living organisms. The metabolism and evolution of microorganisms, and the biogeochemistry they drive, will be a major emphasis.

Instructor(s): M. Coleman, J. Waldbauer
Prerequisite(s): GEOS 13100-13200-13300 or college-level cell & molecular biology
Equivalent Course(s): GEOS 26600, GEOS 36600

ENSC 24100. Ecology - Marine Biological Laboratory. 100 Units.

This course examines the structure and functioning of terrestrial and aquatic ecosystems including the application of basic principles of community and ecosystem ecology. The course also examines contemporary environmental problems such as the impacts of global and local environmental change on community composition and food webs within forest, grassland, marsh and nearshore coastal ecosystems on Cape Cod. This course examines the structure and functioning of terrestrial and aquatic ecosystems including the application of basic principles of community and ecosystem ecology. The course also examines contemporary environmental problems such as the impacts of global and local environmental change on community composition and food webs within forest, grassland, marsh and nearshore coastal ecosystems on Cape Cod.

Instructor(s): Marine Biological Laboratory Staff     Terms Offered: Autumn. L.
Prerequisite(s): Consent only. Admission by application to the Semester in Environmental Science program at the Marine Biological Laboratory in Woods Hole, MA; concurrent registration in BIOS 27711 and BIOS 27712 along with one of BIOS 27713, BIOS 27714 or BIOS 27715.
Note(s): E.
Equivalent Course(s): BIOS 27710

ENSC 24200. Methods in Microbial Ecology - Marine Biological Laboratory. 100 Units.

This course explores the biology of microbes found in the environment, including relationships with the physical, chemical, and biotic elements of their environment. Emphasis is placed on understanding the science underlying the various methodologies used in the study of these organisms and systems. In the laboratory, students will work with the latest techniques to measure microbial biomass, activity, extracellular enzymes, and biogeochemical processes. Students are also introduced to molecular methods for assessing microbial genomic diversity.

Instructor(s): Marine Biological Laboratory Staff     Terms Offered: Autumn. L.
Prerequisite(s): Consent only. Admission by application to the Semester in Environmental Science program at the Marine Biological Laboratory in Woods Hole, MA; concurrent registration in BIOS 27710, BIOS 27711 and BIOS 27712.
Note(s): E.
Equivalent Course(s): BIOS 27714

ENSC 24300. Roles of Animals in Ecosystems – Marine Biological Laboratory. 100 Units.

This course addresses the question, How do animals, including man, affect the structure and function of ecosystems. The course takes an interdisciplinary approach focused on the interactions of animal diversity, migration patterns, population dynamics, and behavior with biogeochemical cycles, productivity, and transport of materials across ecosystems. This course is an elective option within the Semester in Environmental Science program at the Marine Biological Laboratory in Woods Hole, MA.

Instructor(s): Marine Biological Laboratory Staff     Terms Offered: Autumn
Prerequisite(s): Consent only. Admission by application to the Semester in Environmental Science program at the Marine Biological Laboratory in Woods Hole, MA; concurrent registration in BIOS 27710, BIOS 27711, and BIOS 27712.
Note(s): E.
Equivalent Course(s): BIOS 27715

ENSC 24400. Ecology and Conservation. 100 Units.

This course focuses on the contribution of ecological theory to the understanding of current issues in conservation biology. We emphasize quantitative methods and their use for applied problems in ecology (e.g., risk of extinction, impact of harvesting, role of species interaction, analysis of global change). Course material is drawn mostly from current primary literature; lab and field components complement concepts taught through lecture. Prerequisite(s): BIOS 20150, BIOS 20151 or BIOS 20152 Note(s): BIOS 20196 is identical to the previously offered BIOS 23251. Students who have taken BIOS 23251 should not enroll in BIOS 20196. Equivalent Course(s): ENSC 24400

Instructor(s): C. Pfister, E. Larsen     Terms Offered: Autumn. L.
Prerequisite(s): BIOS 20153
Equivalent Course(s): BIOS 20196

ENSC 24500. Environmental Microbiology. 100 Units.

The objective of this course is to understand how microorganisms alter the geochemistry of their environment. The course will cover fundamental principles of microbial growth, metabolism, genetics, diversity, and ecology, as well as methods used to study microbial communities and activities. It will emphasize microbial roles in elemental cycling, bioremediation, climate, and ecosystem health in a variety of environments including aquatic, soil, sediment, and engineered systems.

Instructor(s): M. Coleman     Terms Offered: Autumn
Prerequisite(s): CHEM 11100-11200 and BIOS 20186, BIOS 20197, or BIOS 20198
Equivalent Course(s): GEOS 26650, GEOS 36650

ENSC 24600. Marine Ecosystems: From Microbiomes, to Conservation, Climate & Beyond. 100 Units.

This course is designed for rising 2nd years with interests in microbiology, the environment, and society. More specifically, the course is designed for students considering a science major, as well as non-majors, who are looking for broad exposure to geosciences, environmental and climate science, microbiology, molecular biology, and the intersection between society and science. Students will study coastal marine habitats, connectivity to ocean and climate, dynamics of microbial community structure, and marine conservation alongside gaining experience on laboratory microbiome science and environmental field work. Students will gain firsthand experience with the types of microbes that that influence climate and that impact health through laboratory experiments on culturing and analyzing microbes in 'pristine' and highly impacted coastal ecosystems. Methods to be learned include plating, epifluorescence microscopy, flow cytometry, DNA extraction, and sequencing. Lectures will cover marine microbiology, CO2 sequestration (natural and engineered), geochemistry, coastal and open ocean habitat structure, and links to climate and the climate crisis. We will also address equity issues in marine conservation and the climate crisis. While all field work will be coastal, students will also learn about the open ocean due to the key linkages of water masses as well as climate feedback.

Terms Offered: Summer
Equivalent Course(s): BIOS 27726

ENSC 24800. Climate Systems Engineering. 100 Units.

How might humans use geoscience and engineering to intervene in the climate system with the goal of limiting the impacts of historical carbon emissions? Climate Systems Engineering is the intersection of Climate Systems Science and Systems Engineering. Topics will include (1) solar geoengineering with a focus on stratospheric aerosols, (2) open-system carbon removal such as the addition of alkalinity to soils or directly to the ocean, and (3) local interventions to reduce glacial melting; along with crosscuts on (4) systems engineering and (5) policy implications. Foundational knowledge of climate-related geoscience is a required prerequisite. About a third of class time will be devoted to student presentations and discussion. Class work includes problem sets, peer-graded technical micro-essays, and a collaborative project.

Instructor(s): D. Keith     Terms Offered: Autumn
Prerequisite(s): GEOS 13300 The Atmosphere is required. GEOS 24220 Climate Foundations is strongly recommended.
Equivalent Course(s): GEOS 34800, GEOS 24800

ENSC 25000. Biological Oceanography. 100 Units.

This intensive four-week course addresses fundamental oceanographic processes that maintain and structure marine biodiversity and productivity, including physical oceanographic processes of dispersal and upwelling, environmental selection, biogeography, nutrient dynamics, primary production, and food web dynamics. Students will design an original research project during an initial week-long shore component at Marine Biological Laboratory (MBL) in Woods Hole, MA, and then address their own questions by collecting samples and data aboard Sea Education Association (SEA)'s oceanographic research sailing vessel, the SSV Corwith Cramer, on a 10-day offshore voyage. At sea students will deploy oceanographic instruments, interpret various data streams, and work as research teams and watch members as they navigate and sail the vessel. During a final week-long shore component at MBL, students will analyze and interpret the data they collected and present their results in written and oral reports.

Instructor(s): SEA Staff.     Terms Offered: Spring. MBL Spring Quarter- Biology. L.
Prerequisite(s): Second-year standing or greater (or by consent).
Note(s): Course meets for three weeks (5-6 days/week, 8 hours per day) at Marine Biological Laboratories, in Woods Hole Massachusetts as part of the Spring Quarter at MBL. For more information see https://college.uchicago.edu/academics/mbl-spring-quarter-biology E.
Equivalent Course(s): BIOS 27751

ENSC 28100. Quantitative Environmental Analyses – Marine Biological Laboratory. 100 Units.

This course emphasizes the application of quantitative methods to answering ecological questions. Students apply mathematical modeling approaches to simulating biological and chemical phenomena in terrestrial and marine ecosystems.

Instructor(s): Marine Biological Laboratory Staff     Terms Offered: Autumn. L.
Prerequisite(s): Consent Only. Admission by application to the Semester in Environmental Science program at the Marine Biological Laboratory in Woods Hole, MA; concurrent registration in BIOS 27710, BIOS 27711 and BIOS 27712.
Note(s): E.
Equivalent Course(s): BIOS 27713

ENSC 29002. Field Course in Modern and Ancient Environments. 100 Units.

This course, in its many iterations, has had consistent aims: to provide students with hands-on experience of the processes that produce sedimentary rocks, exposure to standard field methods and fieldwork safety, and experience in developing and conducting an original research project. We consider biological as well as physical processes of sediment production, dispersal, accumulation, and post-depositional modification, and methods of paleoenvironmental analysis. We give significant attention to humans as geological agents: field areas today almost always exhibit legacy and/or ongoing effects from human activities. This year we explore the theme of Coasts and Coastal Resilience, using Lake Michigan shorelines as exemplars of coastal responses to key forcers - water (wave) regime, water level, and sediment supply - on societally relevant time scales. The spectrum of environments will include built structures such as seawalls, jetties, and hardened shorelines, and both natural and engineered "soft" shorelines. We will meet on Tuesdays and Thursdays 3:30-5:00, with approximately half devoted to lectures and discussion, and the other half to labs, which will be either indoors (using research wave tanks in Hinds) or outdoors (using nearby segments of the Lake Michigan shoreline). A day-long Saturday field excursion is also possible.

Instructor(s): S. Kidwell     Terms Offered: Spring
Prerequisite(s): GEOS 13100 and 13200 recommended; contact instructor
Equivalent Course(s): CHST 29002, GEOS 29002

ENSC 29700. Reading and Research in Environmental Science. 100 Units.

Independent study; regular meetings with Geophysical Sciences faculty member required. Register by section corresponding to faculty supervisor.

Terms Offered: Autumn Spring Summer Winter
Prerequisite(s): Consent of instructor and departmental counselor
Note(s): Students are required to submit the College Reading and Research Course Form. Available to nonmajors for P/F grading. Must be taken for a quality grade when used to meet a requirement in the major.

ENSC 29800. Independent Undergraduate Research in Environmental Sciences Marine Biological Laboratory. 100 Units.

This course is the culmination of the Semester in Environmental Science at the Marine Biological Laboratory. An independent research project, on a topic in aquatic or terrestrial ecosystem ecology, is required. Students will participate in a seminar for scientific communication as well as submit a final paper on their project.

Instructor(s): Marine Biological Laboratory Staff     Terms Offered: Autumn. L.
Prerequisite(s): Consent only. Admission by application to the Semester in Environmental Science program at the Marine Biological Laboratory in Woods Hole, MA; concurrent registration in BIOS 27710 and BIOS 27711 along with one of BIOS 27713, BIOS 27714 or BIOS 27715.
Note(s): E.
Equivalent Course(s): BIOS 27712