Given the earth systems listed below, rank from them as to the most open to the

Question

Given the earth systems listed below, rank from them as to the most open to the least open (i.e., closed) with respect to oxygen, carbon dioxide, and water on human time scales. You will create three lists (one for each). Make sure to explain the logic of each of your lists. a. A groundwater aquifer approximately 50 m below the groundwater surface b. The root zone of soil about 1 meter deep c. Silt deposits at the bottom of a 150-foot deep lake d. Eolian sand deposits in the desert e. The mantle f. The mid-ocean ridge g. The San Andreas Fault

Explanation / Answer

with respect to oxigen

1 eolian sand

2 san andreas

3 the root zone of soil 1 meter deep

4 the ground water aquifer 50meter below

5 silt deposite 150 foot deep lake

6 MOR

7 the mantle

reason - the eolean sand is open to surface so it will have much surface area for free oxigen , the sanandreas is also conneted to the surface to it also have enough space for oxigen , the root zone of soil is 1 meter deep so it has less oxigen , the ground water is 50meter deep from the surface and it is full of water so it will have less oxigen , the silt deposites have very less porosity so they have less oxigen , the mid oceanic ridges are source of new magma they have oxigen in bound stage not fre space , and the mantle have also oxigens but not in free space.

with respect to co2

the root zone 1 meter deep

2 eolean sand

3 san andrea

4 MOR

5 the mantle

6 ground water

7 silt deposites

reason - the root zones are rich in carbon so they have definateky rich co2 , the eolean sands are rich in co2 because there is no tree for converting co2 to o2 , the san andreas also have rich co2 because it is connected to the surface , the MOR is rich in co2 because is has huge volatile rich magma for eruption, the mantle has also good amount of co2 as there is metamorphism which release the volatile part of magma, 150 feet below silt deposite has less co2 but there may be some co2 as some organism dies at the bottom and they may creat co2 , the ground water has very less co2 .

with respect to water

1 MOR

2 ground water

3 root zone 1 meter deep

4 silt deposite 150 feet deep lake

5 mantle

6 san andreas

7 eolean sand

reason - the mor is in the sea so they must have huge amount of water , the ground water is full of fresh water, root zone 1 meter deep also have huge water as it is in the vadosa zone of soil , silt deposites have also water as they are in the lake, the mantle has also water as a volatile content , sand andreas may have water as they are on the surface connection , the eolean sand has almost no water.

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