chemistry (ocean) :: essays research papers

What is an spyglassberg? Why are they blue or commons?An grumpberg is a large floating block of fresh wet deoxyephedrine that has broken off the edge of a glacier and been carried disclose to sea somewhat 90% of its mass lies under the water. The bluish streaks of clear, bubble free ice often seen in icebergs results from the refreezing of melt water which fills crevasses take ined in the glacier as it creeps over land. The ice is blue because of the natural light dissipate characteristics of pure ice. Occasionally airborne dust or dirt scoured from land ends up on the glacier surface eventually forming a perceptibly darkened brown or black layer (in any orientation) inwardly the ice of a floating iceberg.What pillow slip of selective information can scientists grow from polar ice?Polar Regions and some alpine areas are sufficiently c doddering that hundredfall accumulates from year to year, building up as glaciers. As snow at the surface gets buried with time it gets compressed to form solid ice and this ice carries with it information about the climate when the snow originally fell. By drilling down into a glacier and recovering this old ice, the information can be used to help understand wiztime(prenominal) climate.The information obtained from ice cores can be divided into three types. The origin of these types of information comes from the solid and dissolved impurities in the snow. Usually snow that falls in those places is almost pure water, but it still contains traces of dust, and pollutants from human activities. This information can be used to detect major environmental changes in the circulation of the atmosphere. The second type of information obtained from ice cores comes from bubbles in the glacier ice. These bubbles are form as snow becomes compressed and the air between the flakes gets trapped. The third type of information obtained from ice cores comes from the frozen water itself. In the oceans, one in about every 500 oxyg en atoms is the heavy isotope, while one in about 70 hydrogen atoms is heavy. However as the water evaporates and is transported to polar regions, the mix of the heavy isotopes changes. These changes are mostly influenced by temperature and it turns out that by measuring water isotopes in ice cores researchers can popularise temperatures when the snow originally fell. In the past 30 years, many ice cores have been drilled to study past climate.