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Announcements in class 2/5/07 Movie Wed. Don’t miss it! Material will be on the exam. Only one...

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Announcements in class 2/5/07 • Movie Wed. Don’t miss it! Material will be on the exam. Only one showing. • Problem Set 4 is posted online. Print it out yourself. PS 4 is due in class Monday, 2/12/07 • PS 5 will be posted Mon. 2/12 and due Wed. 2/21
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Page 1: Announcements in class 2/5/07 Movie Wed. Don’t miss it! Material will be on the exam. Only one showing. Problem Set 4 is posted online. Print it out yourself.

Announcements in class 2/5/07

• Movie Wed. Don’t miss it! Material will be on the exam. Only one showing.

• Problem Set 4 is posted online. Print it out yourself. PS 4 is due in class Monday, 2/12/07

• PS 5 will be posted Mon. 2/12 and due Wed. 2/21

Page 2: Announcements in class 2/5/07 Movie Wed. Don’t miss it! Material will be on the exam. Only one showing. Problem Set 4 is posted online. Print it out yourself.

Outline

• f-ratio

• Phosphorous Cycling

• Carbon Cycling

Page 3: Announcements in class 2/5/07 Movie Wed. Don’t miss it! Material will be on the exam. Only one showing. Problem Set 4 is posted online. Print it out yourself.

NitratePhytoplankton

Up

wel

lin

gM

ixin

g

Vertical

Flux

N2 FixationRiversDeposition

PONDIN

Euphotic Zone

Page 4: Announcements in class 2/5/07 Movie Wed. Don’t miss it! Material will be on the exam. Only one showing. Problem Set 4 is posted online. Print it out yourself.

f-ratio

Upwelling Zone 0.8Gyre 0.1Global Average < 0.5

New Production

New + Regenerated Production

Page 5: Announcements in class 2/5/07 Movie Wed. Don’t miss it! Material will be on the exam. Only one showing. Problem Set 4 is posted online. Print it out yourself.

Sediment traps

to catch

sinking particles

Page 6: Announcements in class 2/5/07 Movie Wed. Don’t miss it! Material will be on the exam. Only one showing. Problem Set 4 is posted online. Print it out yourself.
Page 7: Announcements in class 2/5/07 Movie Wed. Don’t miss it! Material will be on the exam. Only one showing. Problem Set 4 is posted online. Print it out yourself.

Sustainable yields

Page 8: Announcements in class 2/5/07 Movie Wed. Don’t miss it! Material will be on the exam. Only one showing. Problem Set 4 is posted online. Print it out yourself.

NitratePhytoplankton

Up

wel

lin

gM

ixin

g

Ver

tica

lF

lux

N2 FixationRiversDeposition

PONDIN

Euphotic Zone

Fishing

Page 9: Announcements in class 2/5/07 Movie Wed. Don’t miss it! Material will be on the exam. Only one showing. Problem Set 4 is posted online. Print it out yourself.

New Production

Oligotrophic gyres

Upwelling regions

Page 10: Announcements in class 2/5/07 Movie Wed. Don’t miss it! Material will be on the exam. Only one showing. Problem Set 4 is posted online. Print it out yourself.
Page 11: Announcements in class 2/5/07 Movie Wed. Don’t miss it! Material will be on the exam. Only one showing. Problem Set 4 is posted online. Print it out yourself.

↑Annual ↓Perennialr-selected K-selected

Page 12: Announcements in class 2/5/07 Movie Wed. Don’t miss it! Material will be on the exam. Only one showing. Problem Set 4 is posted online. Print it out yourself.

Chemical Forms – P

• PO43- (Phosphate)

• Organic

Page 13: Announcements in class 2/5/07 Movie Wed. Don’t miss it! Material will be on the exam. Only one showing. Problem Set 4 is posted online. Print it out yourself.

The cycling of Phosphorus

Dissolved Inorganic Particulate Organic

uptake

excretion

Runoff

upwelling sinkingdecomposition

Balance maintained via weathering of rock

Page 14: Announcements in class 2/5/07 Movie Wed. Don’t miss it! Material will be on the exam. Only one showing. Problem Set 4 is posted online. Print it out yourself.

Chemical Transformations – P

• AssimilationPO4

3- → OrganicPhytoplankton or other autotrophs

• RemineralizationOrganic → PO4

3-

Heterotrophs

• ExcretionOrganic → DissolvedHeterotrophs and Autotrophs

Page 15: Announcements in class 2/5/07 Movie Wed. Don’t miss it! Material will be on the exam. Only one showing. Problem Set 4 is posted online. Print it out yourself.

Experimental Lakes Area

Lake 227

Page 16: Announcements in class 2/5/07 Movie Wed. Don’t miss it! Material will be on the exam. Only one showing. Problem Set 4 is posted online. Print it out yourself.

Lake 226C, N, PEutrophic algal blooms

C, N

Page 17: Announcements in class 2/5/07 Movie Wed. Don’t miss it! Material will be on the exam. Only one showing. Problem Set 4 is posted online. Print it out yourself.

Lake 227

Page 18: Announcements in class 2/5/07 Movie Wed. Don’t miss it! Material will be on the exam. Only one showing. Problem Set 4 is posted online. Print it out yourself.

Oligotrophic Lake Eutrophic Lake

25 - 100 micrograms/liter phosphorus > 15 micrograms/liter phosphorus

Page 19: Announcements in class 2/5/07 Movie Wed. Don’t miss it! Material will be on the exam. Only one showing. Problem Set 4 is posted online. Print it out yourself.

Chemical forms of Carbon• Inorganic

– CO2

– bicarbonate ion HCO3-

– carbonate ion CO32-

• Organic (fixed …)

• Dissolved (DIC and DOC)

• Particulate (biomass and detritus)

Page 20: Announcements in class 2/5/07 Movie Wed. Don’t miss it! Material will be on the exam. Only one showing. Problem Set 4 is posted online. Print it out yourself.

Carbonate Equilibrium

• CO2 «» HCO3- «» CO3

2-

dissolved bicarbonate carbonate

CO2 ↑ HCO3- ↑ CO3

2- ↑ pH ↓

Ocean pH 8.2

Page 22: Announcements in class 2/5/07 Movie Wed. Don’t miss it! Material will be on the exam. Only one showing. Problem Set 4 is posted online. Print it out yourself.

Source R. Rohde

Page 23: Announcements in class 2/5/07 Movie Wed. Don’t miss it! Material will be on the exam. Only one showing. Problem Set 4 is posted online. Print it out yourself.

C Cycle “Food Web” Diagram

P

Z

BDissolvedInorganicCarbon

DissolvedOrganicCarbon

Main Thermocline

CO2

DissolvedInorganicCarbon

DissolvedOrganicCarbonDeep Remineralization

Sinking Particles

Page 25: Announcements in class 2/5/07 Movie Wed. Don’t miss it! Material will be on the exam. Only one showing. Problem Set 4 is posted online. Print it out yourself.

Carbon

• Solubility Pump– Solubility of CO2 is greater in cooler water

– Deep water formation ↑DIC– C pumped from atmosphere to ocean

• Biological Pump– POC and PIC sinking, DOC downwelling– C pumped from surface ocean to depth

Page 26: Announcements in class 2/5/07 Movie Wed. Don’t miss it! Material will be on the exam. Only one showing. Problem Set 4 is posted online. Print it out yourself.

Deep Water Formation

Source: USC

Page 27: Announcements in class 2/5/07 Movie Wed. Don’t miss it! Material will be on the exam. Only one showing. Problem Set 4 is posted online. Print it out yourself.

Thermohaline circulation

Page 28: Announcements in class 2/5/07 Movie Wed. Don’t miss it! Material will be on the exam. Only one showing. Problem Set 4 is posted online. Print it out yourself.

Saharan Dust Storm Over the Atlantic

Page 29: Announcements in class 2/5/07 Movie Wed. Don’t miss it! Material will be on the exam. Only one showing. Problem Set 4 is posted online. Print it out yourself.

The Cycling of Silicon

Dissolved Inorganic Particulate Organic

uptake

Runoff

upwelling sinkingdissolution

Balance maintained via weathering of rock


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