What are ice nuclei?
Ice cores are cylindrical ice samples removed from ice leaves and glaciers. Because ice cores are taken from regions that remain frozen throughout the year, they contain detailed information about the history of the Earth's climate, for those who know how to look. Paleoclimatologists often study ice cores to collect data on the main climatic events and combine patterns of the country's meteorological history. The cores of ice can be found in storage in many research facilities and archives.
In order to take the basic sample from the ice, they must find an area with significant ice deposits, ideally an area where LED is present for thousands of years. The polar ice cap is the main place for the use of the ice nucleus, as well as some permanent glaciers. Scientists drill into the ice with specialized equipment, by means of liquid to maintain pressure to make a hole of the non -crebusor of the study. Because ice nuclei often experience changes in radical pressure when they are attracted to the surface, scientists must first allow them to "relax" pExtremely low temperatures to avoid breaking. Ice cores must always be kept clean and when the nuclei are finally ready to study, they are processed in a clean room to reduce the risk of contamination.
Looking at the cross -section, the ice nucleus has a number of layers representing decades of snow. Each layer can be used to collect information about climate this year. ICE can capture particles such as pollutants and ashes, along with radioactive isotopes and various levels of melted chemicals. Using the core of ice, scientists can see what oxygen and carbon dioxide levels were historically as historically. It is also possible to find traces such as pollen and dust in ice nuclei that could be used to estimate the predominant wind direction in any given year.
When examining ice cores is one of the key pRobbleme accurate dating. Without a solid date to work with, the data is not very useful. Dating can be done by physical counting the back layer, similar to one with tree rings. It can also be performed by analyzing the level of isotopes in the ice and comparing the levels with known ice samples or looking for key layers in the ice that could be used for extrapolation. For example, when Krakato broke out in 1883, he distributed volcanic ash all over the world and left a trail from this era in ice nuclei.