Changing Climate

Explain at least two pieces of evidence (ice cores, ocean sediment, etc.) that indicate that climate changes have occurred over geologic time and continue to occur.

14 Responses

  1. Luise Siemonsen says:

    My first evidence are the ice cores.
    Scientist climb on different glaciers, to get long ice cores.
    On the highest points of these glaciers the snow never melted, so all particle in the snow were save for million of years. This is very helpful to see what happened when, and how the climate was on the earth. You can see every wet&dry or cold&warm period, you can see when a volcano exploded or the industry revolution starts, also the Co2 levels are visible. And you can see that the Co2 level constantly rice. You can also see that there was climate changes million years ago.

    The second evidence are fossil tree rings.
    Fossil tree rings work like the ice cores. The different rings show different times. You can see when there were wet or dry, cold or warm periods, the rings are nearer to each other or farer away.

    This are my two evidences for the climate change

  2. Darcy says:

    My first evidence are the cores being drilled through ice sheet’s, they have a record of different temperatures back to 120,000 years in Greenland and 800,000 years in Antartica. The second evidence is CO2. CO2 is the probably a main cooling that formed ice sheets on Antartica.

  3. Melissa says:

    The first evidence is the ice cores. You can see the climate change in the ice cores, ice cores allows scientist to see what has happened over time. also can see the changing atomospheric carbon dioxide levels, that increased by one third in the last 200 years. Half of that had increased by 30-40 years. They just give us a lot of information and they are very helpful to see what has happened over time.
    Second piece of evidence is the fossil corals. The fossil coral can work just like the ice cores, they tend to grow more in the dry season then they do in the wet seasons. They’re very helpful because when you go to collect them, they show us how the earth changed over time just like the ice cores.

  4. Ayana says:

    Scientists explore different glaciers, drilling holes into the ice for ice cores. The highest point of the Ice cores is snow that never melted, so therefor it was saved for millions of years. These ice caps are helpful in finding out what big event happened & to see how the climate in that region was. In the Ice cores you can see when there was a super dry season or if it was a wet season. You can see when the Industry revolution started. The Co2 levels are also very visible, you can also tell that they are rising at a constant rate.

  5. Bri says:

    The earth’s climate is always changing. You can find evidence in ice cores & one obvious one is the glaciers melting. In the ice cores, the snow that falls, it doesn’t melt so it just collects everything that was in the atmosphere. you can measure the gasses in the air at the time, and see how much the amount increased or decreased over time. The glaciers melting shows that the climate is getting warmer.

  6. Chris says:

    Scientists that explore glaciers around the world drill into snow and ice at high altitudes to take ice cores drilled out which contains thousands of years of climate history, by looking at lines in the cores you can tell about the wet, dry, cold, and warm seasons it went through by looking at line marks the core has. A graph was made by scientists from data collected by the ice core which showed co2 levels began to rise around the 1820’s a time the industrial revolution took place and continues to rise to this day.

  7. Dylan says:

    Some Pieces of evidence that indicate that climate change has been occurring for a while is one, ice cores, and two, the disappearance of mountain glaciers. Ice cores can display air quality from past years with a clear correlation of recent years having diminishing air quality as CO2 content is higher than it has been in previous years providing context for increased CO2 levels in the atmosphere. The disappearing of mountain glaciers is another piece of evidence that support the idea that climate change has been occurring for a long period of time. Picture evidence alone can show us that the glaciers are melting at a fast rate.

  8. Cassie says:

    There are some key aspects of changing climate. One of those examples is held in the polar ice caps, and glaciers on top of mountains in the tropics. Key ice cores that have been drilled down to bedrock. They hold key clues to climate change from the carbon levels, dust particles, etc. that have been put into the atmosphere. The ice masses are extremely helpful because snow traps in whatever was in the air into layers. Scientists have concluded that rapid climate change is a direct result from human activity, originally set into motion. However the climate is always changing, just not at as rapid of a rate as we’re seeing today. Especially in the tropical glaciers, places that receive the least amount of climate change.

  9. Joe says:

    Ice cores taken in arctic and tropical glaciers show records by year for thousands of years, these records hold information like co2 levels throughout history and the level of snowfall through warm periods.
    Another piece of evidence for global climate change is ocean acidification, ocean acidification is caused by an increase in co2 levels and will cause a large portion of oceanic fish to die off and coral reefs to bleach as well.

  10. Logan says:

    Two pieces of evidence that lead us to the conclusion of climate change are rising levels in ice cores and the earth’s average temperature is rising. Scientists use ice cores pulled from glaciers to see the changes in the air year after year for the past 1000’s of years. When they plot the data we can see that the co2 levels have rapidly risen and the recorded temperature data is relatively similar and correlates.

  11. jenna says:

    Ice cores and oceans show us climate change because, in ice cores you can tell what was in the air hundreds of thousands of years ago. And as the ocean levels increase the temp increases too.

  12. Allison says:

    CO2 levels have risen substantially even for being in a interglacial period, they usually reach 290ppm but today’s levels are around 402ppm. Also, due to the rising CO2 levels the atmosphere is more acidic, damaging ecosystems. Since the atmosphere is so destroyed it will take more than 100,000 years to recover, based on previous evidence.

  13. AidanBri says:

    One piece of evidence is the ice cores showing what has gone through the atmosphere and there is more traces of CO2 in the ice since the start of the industrial age and because of the CO2 in the air increasing the temp starts to rise. Another piece of evidence is glaciers melting such as the mountain melting an example of this is Kilimanjaro glacier

  14. Llewellyn Grayhawk says:

    Climate change can be seen through many things such as ice core samples and the correlation of co2 and the climate of the world. In ice core samples you can see the different amounts of co2 that was in the air at that time. After collecting data from the ice you can see that an obvious correlation appears through the temp of that day and the amount of co2.

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