B Block Human Geography - Today we'll look at the Key Issue, "Why Do Services Cluster Downtown"? Downtown is the best-known and the most visually distinctive area of most cities. It is usually one of the oldest districts in a city, often the site of the original settlement. The central business district (CBD) is the core of the city where many services cluster. Public, Business and Commercial services are attracted to the CBD because of its accessibility and density. We'll examine North American and non North American downtown cores.
The process by which the populations of urban settlements grow is known as urbanization. Urbanization has two dimensions: an increase in the percentage of people living in urban settlements and an increase in the number of people living urban settlements. These two factors have different global distributions and occur for different reasons. So, Vancouver?
Would you live in the downtown of a city or out in the suburbs?
Questions for the day include:
1. Using your knowledge of services from chapter 12 (last week's work), define each term and give an example of a typical downtown shop with that characteristic.
High Threshold
High Range
2. Why are these shops decreasing in the CBD?
3. Regarding residential uses – identify a factor pushing them out of the CBD and another that is pulling them elsewhere.
A Block Physical Geography - So today we'll look at natural climate forcing and then anthropogenic climate change. From yesterday regarding natural climate forcing and climate feedbacks:
- Milankovich Cycles (eccentricity, or orbit; obliquity, or tilt; and precession, or wobble)
- the Thermohaline circulation system, and
- Climate Feedbacks (including the PETM - Paleocene-Eocene thermal maximum)
A rapidly rising population, the escalating level of industrialization and mechanization of our lives, and an increasing dependence on fossil fuels have driven the anthropogenic climate change of the past century. The biggest anthropogenic contributor to warming is the emission of CO2, which accounts for 50% of positive forcing. CH4 and its atmospheric derivatives (CO2, H2O, and O3) account for 29%, and the halocarbon gases (mostly leaked from air-conditioning appliances) and nitrous oxide (N2O) (from burning fossils fuels) account for 5% each.
Also because we talked briefly yesterday about climate refugees check out the Climate Trail. From the game website:
The game is about climate refugees fleeing ever worsening conditions after inaction on climate has rendered much of the USA (and the world) uninhabitable. The game combines the adventure and play of the journey north with visual novel elements, where characters reveal how and why this climate apocalypse unfolded.
D/C Blocks Environmental & Social Sciences - Today we start with our guest Gord Johns, your MP for the Courtenay-Alberni riding. Mr. Johns wanted to come speak with you as a result of the letters you sent to him and to Rachel Blaney back in November. Remember, you've got questions to ask and we are all privileged to have him listen to our concerns. After Mr. Johns you'll have time to work on your Environmental Inquiry project for the rest of the afternoon.
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