slide1 l.
Download
Skip this Video
Loading SlideShow in 5 Seconds..
Carbon and Climate A talk by Dr. Bob Field, Research Scholar in Residence and adjunct physics professor PowerPoint Presentation
Download Presentation
Carbon and Climate A talk by Dr. Bob Field, Research Scholar in Residence and adjunct physics professor

Loading in 2 Seconds...

play fullscreen
1 / 28

Carbon and Climate A talk by Dr. Bob Field, Research Scholar in Residence and adjunct physics professor - PowerPoint PPT Presentation


  • 308 Views
  • Uploaded on

Carbon and Climate A talk by Dr. Bob Field, Research Scholar in Residence and adjunct physics professor This talk will explore the abundance and flows of carbon in the solid Earth, oceans, atmosphere, and biosphere and the role of greenhouse gases in the atmosphere.

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'Carbon and Climate A talk by Dr. Bob Field, Research Scholar in Residence and adjunct physics professor' - Michelle


Download Now An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
slide1

Carbon and Climate

A talk by Dr. Bob Field, Research Scholar in Residence and adjunct physics professor

This talk will explore the abundance and flows of carbon in the solid Earth, oceans, atmosphere, and biosphere and the role of greenhouse gases in the atmosphere.

Carbon forms the backbone of proteins, fats, carbohydrates, and even DNA. Carbon also plays a central role in biogeochemical processes, trapping vital heat as it cycles through the atmosphere.

slide2

www.calpoly.edu/~rfield

Carbon in the Geobiosphere.htm

Thermalstructure.htm

drbobfield bobfield64

The only good is knowledge and the only evil is ignorance (Socrates)

Return to Physics Department Home Page

slide6

Recent Pre-industrial Global Carbon Cycle with major land flows

major carbon fluxes into and out of the atmosphere, soil, and land biota

atmosphere 600

CO2 from organics

60

CO2 weathering

0.2

NPP

60.6

land biota 700

decay

60.6

land and soil 3000

based on F.T. Mackenzie & A. Lerman, Geobiology Vol 25: Carbon in the Geobiosphere – Earth’s Outer Shell

GPP ~ 110

respiration ~ 50

slide7

Recent Pre-industrial Global Carbon Cycle with major ocean flows

major carbon fluxes into and out of the atmosphere, ocean, and ocean biota

atmosphere 600

CO2 evasion warm ocean

90.5

CO2 dissolution cold ocean

90

ocean biota 3

NPP

50

decay 50

ocean 40,000

based on F.T. Mackenzie & A. Lerman, Geobiology Vol 25: Carbon in the Geobiosphere – Earth’s Outer Shell

GPP ~ 93

respiration ~ 43

slide8

atmosphere 600

CO2

from organics 0.1

CO2 volcanism and metamorphism

0.2

CO2 from organics

60

CO2 evasion warm ocean

90.5

CO2 weathering

0.2

NPP

60.6

CO2 dissolution cold ocean

90

ocean biota 3

land biota 700

NPP

50

decay 50

decay

60.6

ocean 40,000

land and soil 3000

river erosion

1.2

uplift

0.4

carbonate sediment

0.6

organic sediment 0.1

sediments 80,000,000

subduction 0.2

crust 3,500,000

upper mantle 132,000,000

lower mantle 400,000,000

Animated Recent Pre-industrial Global Carbon Cycle with nominal flows

major carbon fluxes into and out of the atmosphere, ocean, soil, and biota

based on F.T. Mackenzie & A. Lerman, Geobiology Vol 25: Carbon in the Geobiosphere – Earth’s Outer Shell

slide9

Global Carbon Mass Concentrations

120 ppm atmosphere 600 GT

100,000 ppm ocean biota 3 GT

340,000 ppm land biota 700 GT

26 ppm ocean 40,000 GT

116 ppm land and soil 3000 GT

400 ppm sediments 80,000,000 GT

400 ppm crust 3,500,000 GT

140 ppm upper mantle 132,000,000 GT

140 ppm lower mantle 400,000,000 GT

based on F.T. Mackenzie & A. Lerman, Geobiology Vol 25: Carbon in the Geobiosphere – Earth’s Outer Shell

slide11

2000

scattering by N2, O2 and aerosols

1500

Intensity

1000

500

absorption by ozone, water, and CO2

0

0.3

0.5

1

1.5

2

2.5

3

Wavelength

Spectrum of Sunlight observed on Earth

visible

window

sun is directly overhead

no clouds

direct beam only

UV Visible Infrared

slide12

f

Snow

60%

Clouds

50%

Sand

40%

Soil

20%

Plants

15%

Water

8%

Average Visible Reflectances

of common substances

Sun

slide13

Sun

temperature vs. altitude

cool

-70F

10 km

Troposphere has 75% of air

density and temperature decrease with altitude

altitude

warm

60F

sea level

temperature

ocean

After Tarbuck

slide15

273K

water

freezes

CO2

O3

H2O

255K

atmosphere

Greenhouse GasesAbsorbBlackbody Radiation

30

288K Earth's surface

25

20

Intensity

15

10

5

0

0

5

10

15

20

25

30

l

Wavelength (microns)

slide16

15

12

40

etc.

etc.

10

3

etc.

15

Sun

Average Global Energy Budget (%)

scattered

sunlight

incident

sunlight

100

30

Let’s ignore greenhouse gases

Where does the 50+20 go?

20

absorb

atmosphere

sea + land

50

absorb

slide17

27

15

2

2

etc.

38

31

etc.

10

8

etc.

41

24

Sun

Average Global Energy Budget (%)

scattered

sunlight

incident

sunlight

100

30

Where does the 50+20 really go?

20

absorb

atmosphere

sea + land

50

absorb

slide18

radiated heat

LWIR

65

5

radiate

condense

absorb

155

30

105

radiate

110

90

30

absorb

evap

radiate

Sun

Average Global Energy Budget (%)

scattered

sunlight

incident

sunlight

100

30

20

absorb

atmosphere

sea + land

50

absorb

slide19

incoming

SW

outgoing

LW

outgoing

SW

energy flow in the atmosphere

incoming

LW

absorb and scatter SW

absorb and emit LW

convect moist air

convection

convection

absorb and scatter SW

absorb and emit LW

convect moist air

convection

convection

absorb and scatter SW

absorb and emit LW

condense water

latent heat

conduction

absorb and scatter SW

absorb and emit LW

evaporate water

conduct heat

troposphere diagram SWLWLH

physics senior project:

simplified Microsoft Excel model of feedback between atmosphere, oceans, and land

slide28

Carbon and Climate

The long term persistence of liquid oceans on Earth is essential to climate and to life.

Carbon has influenced global climate and the water cycle for billions of years.

Fortunately, as the Sun has grown brighter, carbon’s abundance has decreased sharply.

Comprising only 150 parts per million in the atmosphere, oceans, and solid Earth, carbon is now concentrated in land and ocean biota and in soils and sediments.