How does the method of dating climate records vary with the type of archive? Different types of archives require different methods of dating, carbon 14 dating would not be useful to date material millions of years old, same for tree rings. The type of archive determines what type of dating to utilize.
How does the resolution from sedimentary archives vary with depositional environment?
How does the resolution from sedimentary archives vary with depositional environment? The resolution is higher in sedimentary archives if there is less deposition and weathering in its environment. Which two major groups of organisms are most important to climate reconstructions over the past several million years?
Why are ocean sediments and ice cores especially important archives of climate?
Why are ocean sediments and ice cores especially important archives of climate? Oceans are important because they contain archives of vary old past climatic changes on earth. Ice cores contain past climatic changes from recent timelines not super ancient like ocean sediments.
What evidence suggests that earth has always had a long term thermostat regulating its climate?
What evidence suggests that earth has always had a long-term thermostat regulating its climate? One hypothesis is that greenhouse gases act as earths thermostat.
What evidence do scientists use to study the ancient atmosphere describe what a proxy indicator is and give two examples?
Ice cores are proxy indicators that can determine atmospheric composition, greenhouse gas concentrations, temperature trends, snowfall, solar activity, and frequency of forest fires of ancient atmospheres.
Which of the following is a statement about climate rather than weather?
Which of the following is a statement involving climate rather than weather? The winters here are dry and warm. Climate refers to the average weather in a given location over a long period of time. Global temperatures have fluctuated many times in the last 800,000 years causing glacial and interglacial events.
What evidence indicates a different glacial deep water flow pattern in the North Atlantic quizlet?
What evidence indicates a different glacial deep-water flow pattern in the North Atlantic? Deep water formed in N. Atlantic have high Carbon 13 values and low nutrient concentrations, while Southern Oceans are the opposite. How does the composition of pollen in lake sediments tell us about climate?
How do ocean sediment cores show climate change?
Sediments carried from land by rivers, winds, and ocean currents are also deposited on the ocean floor. These deposits of microorganisms and sediment form layers over time. The layers provide evidence of changes in Earth’s climate. … The samples they recover are called sediment cores.
How was climate different in the Eocene?
During the Eocene, climates were warm and humid—temperate and subtropical forests were widespread, whereas grasslands were of limited extent. For example, the Eocene forests of Oregon were made up of trees and plants similar or identical to those now found in Central and South America.
How do ice cores show climate change?
Ice cores can tell scientists about temperature, precipitation, atmospheric composition, volcanic activity, and even wind patterns. The thickness of each layer allows scientists to determine how much snow fell in the area during a particular year.
How does the Earth’s geological carbon cycle act as a thermostat?
When volcanoes erupt, carbon dioxide is blasted into the atmosphere. … This cycle acts as a natural thermostat because the chemical reaction that draws carbon dioxide out of the atmosphere by reacting it with water vapour is highly temperature dependent.
How could chemical weathering be both the driver and the thermostat of Earth’s climate?
“From looking at the relative abundance of lithium isotopes in ocean-derived rocks, we were able to confirm that chemical weathering is the driver of the Earth’s natural thermostat. … So more weathering removes CO2 from the atmosphere and puts a break on global warming.
What evidence shows that the world was warmer 100 Myr ago than today quizlet?
What evidence shows that the world was warmer 100 Myr ago than today? Models showed that geographically, the poles would be colder without an increased CO2 level. What are the possible causes of mismatches between the models and geologic observations?