Section 6: Water and Oceans

Reading due 4/26: vanLoon Chapters 9 and 11. Section 9.2 is largely review of Gen Chem concepts that you should know. We have also already discussed the first part of Section 11.2 (CO2 solubility.)  There will be a quiz Thursday on Chapter 9, Section 11.1, and the first 1.5 pages of 11.2.

Class slides: Apr 24 Slides

Resources: Overview of Water Properties

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Section 5: Acid Rain

Due 4/17 – Reading: Aerosols: vanLoon Chapter 6 Intro and Section 6.1 ‘Sources’ up to but not including the section on ‘Arctic haze’. Although we will have finished our discussion of aerosols in class, there will be some questions on aerosols on the quiz. Acid Rain: Acid Rain Revisited; Is Acid Rain a Thing of the Past? The readiness portion of the quiz on Acid Rain will cover thru page 8 of ‘Acid Rain Revisited’.

Class Slides:  Apr 17 Slides; Apr 19 Slides

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Section 4: Tropospheric Chemistry

Our next topic will be the chemistry and pollution of the troposphere. The composition of this region of the atmosphere is particularly important because it is the air that we breathe. We will look at some of the principle factors and chemical processes contributing to poor air quality.

Due 4/24: Homework 6 Tropospheric Chem – Updated

Due 4/5 – Reading: van Loon and Duffy, Chapter 4 and Chapter 7 . The pages corresponding to each section are different in the two editions. See the table below for the edition you are using. Note that the quiz will draw from some pages in Ch 4 and some in Ch 7.

Section 4th Edition pages 3rd Edition pages
Chapter 4 Intro, 4.2 thru ‘Nature of photochemical smog’ 76-85 73-81
Quiz will draw from 76-79 73-76
‘The most abundant hydrocarbon’ and ‘General principles describing VOC oxidation’ 89-91 85-87.5
‘Engine design and catalytic converters for emission control’ 97.5-98 93.5-94.5
‘Ozone production from engine emissions’ 103.5-104 99.5-100
Chapter 7 Intro and 7.1 158-163 150-158
Quiz will draw from 158-163 150-155.5

Class slides: Apr 10-12 Slides

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Section 3: The Stratosphere – continued

Due Tuesday 4/3 (in class): Homework 4 – van Loon and Duffy Ch. 3. The question numbers depend on your edition of the text. If you have the 4th Edition, do #2, 3, 4. If you have the 3rd Edition, do #1, 2, 3. This is a short assignment as a reminder of where we were before the break. On #2, data on bond orders and lengths can be found in any Gen Chem textbook.

Due Tuesday 4/10: Homework 5 Stratospheric Chem 2Ozone Model

Class slides: Apr. 3 Slides

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In-class Activities

Global Mean T Activity; Building Elements ActivityCarbonate-Silicate ActivityOrganic Carbon ActivityOzone Profile Activity


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Midterm Exam Information

The midterm exam will be given Thursday, March 22 at 6 pm in Keyes 102. The exam will be written to take 1 hr, but you will have 2 hours to complete it. If anyone requires special accommodations, please let me know.

The exam questions will be most similar to the homework assignments in that they will be short/long answer problems and questions (i.e., not multiple choice like the readiness quizzes). Some of what we have learned is quantitative (for example: box models, calculating mixing ratios or concentrations, equilibrium temperature, etc.) and some of it is descriptive (for example, explaining feedback cycles or describing atmospheric trends.) You should expect questions that require both of these and connect them together, for example by calculating a lifetime associated with a change and then interpreting the result in terms of its effects on the system (the nitrogen cycle problem on the HW is an example of this).

Here is a Study Guide for the material on the exam. It is intended to be a guide to the major concepts, ideas, and methods we have discussed and used so far in the course. As a disclaimer, it does not include every piece of information presented in lecture or in the reading, which may appear on the exam. (Note that only the first half of VL Chapter 2, thru p 29, will be on the exam. The remainder of Ch 2 will not be covered.) In the left column, I’ve provided a reference to the reading, class slides, class activities, or homework problems that relate to each topic. In studying for the exam you should aim to review and synthesize information into your own cohesive body of knowledge. This study guide is intended to provide a framework for this process. Hence, I have intentionally posed questions and left things for you to fill in. Feel free to download this document and modify it or fill it in as you wish (but be warned the formatting is a bit finicky!)

The following are equations and relationships you are expected to know for the exam. I may also ask you to use other equations from the material, but these will be provided if needed. You should remember the equations for residence time and the steady state concentration for a box model, how to calculate number density and mixing ratio, the chemical reaction for photosynthesis/aerobic respiration, how to assign oxidation states, mole fractions of the top 4 atmospheric gases (not including H2O), the height of the tropopause and height ranges for the troposphere and stratosphere.

I am available to answer any questions you have. Office hours this week will be Monday, 3:30-5 pm, Tuesday 5 – 6:30 pm,Wednesday 3:30 – 4:30 pm, and Thursday 12:15 – 2:00 pm. Also, feel free to email me with questions or to set up an appointment.

Happy Studying!

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Assignment – Climate Modeling

Assignment due Wednesday, 3/21 by 5 pm: Climate Modeling
Note that the assignment has a lot of description and instructions, so it may look long, but I estimate it should take you about an hour to complete. If it is taking you longer, please let me know.

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Section 3: The Stratosphere

Due 3/15 – Reading: van Loon Chapter 3: Stratospheric Chemistry – Ozone. There will be a readiness quiz on Thursday 3/15.

Class Slides: Mar. 20 Slides; Mar. 22 Slides

Resources: NASA Ozone Hole Tracker

Buck Lab Environmental Networking Event 3/16!!

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Section 2: Element Cycling and Climate

Due 3/1 – Reading: van Loon and Duffy Chapters 1 and 2

Due 3/6 – Reading: van Loon and Duffy Chapter 8 thru end of section 8.3 (p. 182-203). No quiz!

Due Friday 3/9: Homework 2

Due Tuesday 3/13: Reading: IPCC WG1 Report (The Scientific Basis) Summary for Policymakers.  (You may also wish to read the summaries of the WG2 (Impacts)  and WG3 (Mitigation) reports; these are optional.) Also, please find an article in the press on some aspect of climate change. It can be on causes, effects, impacts, or solutions. Write a one-paragraph summary of the article and formulate 2-3 questions you have on science behind the topic. Be prepared to turn this in and to discuss your article and questions in class on Tuesday. Finally, please bring a laptop computer to class on Tuesday.

Class Slides: Feb. 27 Slides; Mar. 1 Slides; Mar. 6 Slides;  Mar. 8 Slides; Mar. 13 Slides; Mar. 15 Slides

In-class Activities: Organic Carbon ActivityOzone Profile Activity

Resources: NOAA CO2 Tracker; Daily CO2 Tracker; Carbon Cycle; Global Warming Potentials

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Section 1: Elements and the Earth

Due 2/13 – Reading: Langmuir and Broecker, Chapter 1: Earth and Life as Natural Systems (all); Chapter 2: The Big Bang and Chapter 3:  The Raw Material – read just the intros to each chapter in italics on p. 27-28 and p. 51-52; Chapter 4: Preliminary Fabrication (all).

Note that copies of this book are available for you to read in Keyes 104. Please do not remove the textbook from the room without speaking with me first.

There will be a short (5 min) readiness assurance quiz on the reading at the beginning of class on 2/13.

Please also complete this doodle poll to find the best time for office hours.

Due 2/20 – Reading: Langmuir and Broecker, Chapter 9: Making it Comfortable – all except you can skip p. 253 – 257 (Evidence for Liquid Water and Stable Isotope Fractionation); Chapter 15: Energizing the Surface – all.

Due 2/23: Homework 1

Class Slides: Feb. 13 Slides; Feb. 15 SlidesFeb. 20 Slides; Feb. 22 Slides

In-class Activitites: Global Mean T Activity; Building Elements ActivityCarbonate-Silicate Activity

How to Build a Habitable Planet – Text Resources

Field Trip: For information on the Maine Huts Stratton Brook field trip 3/9-10, please see here. Please complete this questionnaire about the trip by Thurs. 2/22.

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