Soil Carbon

Question 1

Inorganic C

Answer 1

CaCO₃

Question 2

Organic C

Answer 2

C-H

Question 3

Pool

Answer 3

• En lagringsplass der innholdet varierer over tid.
• En sammensetning av “stillbilder” (stock) over tid

Question 4

Stock

Answer 4

• Innholdet i en pool på et gitt tidspunkt
• Et “stillbilde” av en pool

Benevning:

Question 5

Fluks

Answer 5

Change over time

Change = input - losses
Change = Input through photosynthesis - losses through respiration

Question 6

Flux-equation, simple

Answer 6

Question 7

Flux-equation, advanced 1

Answer 7

Question 8

Flux-equation, advanced 2

Answer 8

Question 9

Sink (equation)

Answer 9

Question 10

Source (equation)

Answer 10

Question 11

Another name for Megatonne

Answer 11

Metric tonne

Question 12

Mg, name

Answer 12

Megatonne

Question 13

Mg, number

Answer 13

= 10⁶ g
= 1000 kg
= tonne

Question 14

Gt, name

Answer 14

Gigatonne

Question 15

Gt, number

Answer 15

= Gigatonne
= Giga × tonne
= 10⁹ tonne
= 10⁹ × 10³ kg
= 10⁹ × 10³ × 10³ g
= 10¹⁵ g
= Pg
= Petagram

Question 16

Pg

Answer 16

Gt

Question 17

Peta

Answer 17

10¹⁵

Question 18

10¹⁵

Answer 18

Peta

Question 19

Giga

Answer 19

10⁹

Question 20

10⁹

Answer 20

Giga

Question 21

Tera

Answer 21

10¹²

Question 22

10¹²

Answer 22

Tera

Question 23

Mega

Answer 23

10⁶

Question 24

10⁶

Answer 24

Mega

Question 25

Hectare, SI-unit?

Answer 25

No

Question 26

Hectare

Answer 26

10 000 m²

Question 27

10 000 m²

Answer 27

Hectare

Question 28

Hectare, forkortelse

Answer 28

ha

Question 29

Decare

Answer 29

1 000 m²

Question 30

1 000 m²

Answer 30

Decare

Question 31

Are

Answer 31

100 m²

Question 32

100 m²

Answer 32

Are

Question 33

Acre

Answer 33

4 047 m²

Question 34

4 047 m²

Answer 34

Acre

Question 35

Tonne

Answer 35

= **10³ kg** = 10³ × 10³ g = **10⁶ g** = Mg = Megagram

Question 36

= 10⁶ g

Answer 36

= Tonne = Mg. Megagram

Question 37

10³ kg

Answer 37

Tonne

Question 38

Unit for mass

Answer 38

g, gram

Question 39

Mass area

Answer 39

= g / m² = g m⁻²

Question 40

Mass volume

Answer 40

= g / m³ = g m⁻³

Question 41

Units for flux

Answer 41

Changes i mass area/volum per time

Question 42

Units for stock

Answer 42

Mass area → g m⁻² Mass volume → g m⁻³

Question 43

Units for pool

Answer 43

Mass area → g m⁻² Mass volume → g m⁻³

Question 44

Input at equilibrium, equation

Answer 44

Question 45

Photosynthesis can be seen as...

Answer 45

Charging the carbon battery

Question 46

NPP

Answer 46

= Net Primary Production = GPP - Respiration

Question 47

GPP

Answer 47

= Gross Primary production = Everything produced from photosynthesis

Question 48

Units: Net Primary Productivity

Answer 48

Flux Mass / area × time

Question 49

Respiration can be seen as...

Answer 49

draining the carbon battery

Question 50

Decomposition coefficient

Answer 50

Determines how fast the demposition is. Controlled by: - Temperature - Moisture

Question 51

**Respiration** is often modelles as a function of...

Answer 51

Temperature & water

Question 52

Changes in soil carbon is often modelles as a function of...

Answer 52

Temperature & water

Question 53

As of now, which two pools best describe carbons fate in soil?

Answer 53

- Two pool-modell - POM & MAOM

Question 54

POM =

Answer 54

Particulate organic matter - Young Carbon - Tiny bits of decomposing OM - Fresh OM - Breaks down quickly - Helps feed soil organisms quickly - Does not keep Carbon in soil for very long

Question 55

MAOM

Answer 55

Mineral-Associated OM - Old Carbon - OM stuck to soil particles - More stable and breaks down much slower - Stores carbon in the soil for a long time

Question 56

Which is most stable, POM og MAOM?

Answer 56

MAOM Mineral-Associated OM

Question 57

Equation for changes in - Young Carbon - Old Carbon

Answer 57

Question 58

What is the "**4 per mille" (4 ‰)** soil carbon initiative?

Answer 58

🌱 Increase soil organic carbon (SOC) stocks by 0.4% (or 4‰) per year.