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Posted by: Marci on 9/25/03 Title: can past environmental conditions be inferred from glaciers and trees?
Postnum: 197 EntryID:937
Where can i find info on this specific topic?

Responses

Posted by: Keith Clavet on 10/1/03 Title: Re: can past environmental conditions be inferred from glaciers and trees?
Postnum: 197 EntryID:940
Absolutley! Some Historical Aspects can be derived from both Glaciers and Trees. Were Glaciers are concerned you are looking along the lines of atmospheric conditions, while with trees there is some atmospheric decernible data (given known/theorized conditions) but it is more relevant to the nutrient cycles in relation to their growth.

To start:

www.biology.ualberta.ca/schindler.hp/schindle.html http://www.sacredbalance.com/web/drilldown.html?sku=43

Posted by: Mike Johnston on 10/3/03 Title: Re: can past environmental conditions be inferred from glaciers and trees?
Postnum: 197 EntryID:941
In addition to the items that the previous post mentioned there have been studies that have extrapilated the co2 content of the earths atmosphere and then compared it to climatic cycles of warming and chilling on the earth as born forth by growth paterns in various plants. Through these there has been some doubt shed on wether co2 increases/decreases preceed or follow global temperature flucuations. This is one of the reasons that many have doubts on the accuracy of the Kyoto predictions and have been slow to endorse preventive measures. One of the examples cited is the fact that in Roman times the north coast of Africa was the bread basket of the empire, now it is agriculturally challenged due to comparitive doughts and consequent soil erosion. This change hapened well before smoke stack industries blossomed due to changes, (warming), of the areas climate. Most of the data we have form pre written history is derived such things as trapped gases in glacial/artic ice and pollen deposits in soil. A good place to start to look for this type of information is National Geographic. i emember several articles about the areas in Turkey and Lebanon where they used pollen to determine the types of plants that grew in the area aroungd the times of the early Isrealites. I hope this has been helpful.

Mike J.

Posted by: jill on 10/17/03 Title: Re: can past environmental conditions be inferred from glaciers and trees?
Postnum: 197 EntryID:948
also, the pollen grains in glaciers can be deciphered by those in the know. trees and glaciers would generally cover different time periods. check generally the literature in geography & geology - sub-topic: palynology good luck!

jill

Posted by: Peter P on 11/28/03 Title: Re: can past environmental conditions be inferred from glaciers and trees?
Postnum: 197 EntryID:972
With the inseption of the glacomious certifugal method, historical data can be extruded from source pollution measurements from the stamen of select northern hemispherical shrubs and ferns. This has been particularly successful on the east coast of Africa, early researchers were able to use these methods during some rainy season experiments often able to compare these test results to the ones obtained from the Algerian method of sub-cropnatic consuptional feathering. Hope this helps - Peter P

Posted by: Brent on 1/6/04 Title: Re: can past environmental conditions be inferred from glaciers and trees?
Postnum: 197 EntryID:1009
If I want to know about the past, I just have to dig a well. I live above a huge underground lake that was burried I suspect when the meteor hit millions of years ago. Small snail and clam shells and also wood at around 100 feet down.

Brent


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