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IB Student Picnic. Wednesday, tomorrow!, 5-8 pm Illini Grove Pavilion (corner of Lincoln and Pennsylvania Ave.) Meet Faculty Free Food Free T-shirt Find out what SIB is all about and meet other IB majors!! Email [email protected] or 333-3044 **Rain Location: 3 rd floor Levis**

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slide1

IB Student Picnic

Wednesday, tomorrow!, 5-8 pm

Illini Grove Pavilion

(corner of Lincoln and Pennsylvania Ave.)

Meet Faculty Free Food Free T-shirt

Find out what SIB is all about and meet other IB majors!!

Email [email protected] or 333-3044

**Rain Location: 3rd floor Levis**

(912 W Illinois)

assignment

Assignment

Responses to Climate Change:

Lecture Outline: print, read, bring…

Learn…

1) 5 major concepts

2) 6 levels of ecological organization

(see 1.1 also)

3) contrast acclimation vs adaptation

Pg. 146-7 in text

Midwest Climate

slide5
OBJECTIVES: What creates variation in climate and how does it explain the diversity and distribution of biomes?
  • Build a model for proximal causes of global variation in climate and biomes
  • How do features of the earth contribute to climatic variation?
  • What are causes of temporal changes in climate and biomes?
  • What are local effects on climate?
pre test what feature of the earth causes
***PRE-TEST: What feature of the earth causes:

1) Daily rhythm of dark and light?

2) Temperature warmer at 0º than 90 º?

3) Seasonal change in climate?

4) Less variation in temperature in

N than S?

5) Winds to be diverted from N-S direction?

Rotates on axis

B) Round

C) Tilt of 23º on axis

D) Rotates around sun

E) More land mass in N than S

answers
Answers:

1) Daily rhythm of dark and light? = A

2) Temperature warmer at 0º than 90 º? = B

3) Seasonal change in climate? = C + D

4) Less variation in temperature in

N than S? = E

5) Winds to be diverted from N-S direction?

= A + B

  • Rotates on axis

B) Round

C) Tilt of 23º on axis

D) Rotates around sun

E) More land mass in N than S

overall conceptual model

Overall conceptual model:

Solar radiation 

temperature 

wind and ocean currents 

precipitation

what accounts for differences in range of temperatures in n vs s hemisphere
***What accounts for differences in range of temperatures in N vs S hemisphere?

N.B. Specific heat is higher for water than land.

variation in temperature generates winds n b mirrror of s and n hemispheres

Variation in temperature generates winds.(N.B. Mirrror of S and N hemispheres)

Winds drive ocean currents and redistribute heat and moisture.

solar equator itcz moves seasonally

Solar equator (ITCZ) moves seasonally.

(so do belts of temp., wind, and rain)--->

causes seasonal variation in climate.

ocean currents 1 differ in n and s 2 redistribute heat and moisture and 3 affect

Ocean currents 1) differ in N and S, 2) redistribute heat and moisture and 3) affect

marine environment on global scale

climates on land.

clockwise

counter-

clockwise

upwelling

upwelling currents bring cold nutrient rich water to the surface support high productivity
Upwelling currents bring cold, nutrient-rich water to the surface --->support high productivity.
slide20

***Why are (most) deserts on W side of continents? What causes the Gobi desert in central Asia?Why does England have temperature deciduous forest rather than boreal forest?

overall conceptual model1

Overall conceptual model:

Solar radiation 

temperature 

wind and ocean currents 

precipitation

what factors have changed existence and location of biomes through time
***What factors have changed existence and location of biomes through time?
  • Continental drift
  • Mountain building and rain shadows
  • Changes in orbit, tilt, wobble of earth
  • Climate variation
  • past climate change
  • present climate change
  • Human alteration in land cover
slide23

Changes in biomes

through geological

time…

slide24

El Nino vs. El Nina: note recent increase

in stength + frequency of El Nino

slide29

Negative impact of

El Nino on crops

In far-flung places

what determines local climate
***What determines local climate?
  • 1) Proximity to bodies of water
  • Continentalclimates in interiors

More arid

More variable

  • Maritime climates on coasts

Less arid

Less variable

2 topography gradients in mountains
2) Topography: gradients in mountains
  • Air cools as rises---> temp. decrease-->vegetation changes
  • (6-10°C drop for every 1000 m in elevation)
why do mountains cause a rainshadow on their leeward side how do they affect biomes
Why do mountains cause a rainshadow on their leeward side? How do they affect biomes?

How do mountain and wind directions affect this?

slide33
***Topographysuperimposes local variation on general climatic patterns. What causes these vegetation patterns?
slide36
OBJECTIVE: What creates variation in climate and how does it explain the diversity and distribution of biomes?
  • Build a model for proximal causes of global variation in climate and biomes
  • What features of the earth contribute to climatic variation?
  • What are causes of temporal changes in climate and biomes?
  • What are local effects on climate?
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