PES » Global Warming » Information Center » Alaska, Northern Canada, and Greenland » Hypothesis
	Before you can begin to examine the data about possible climate change, you need a hypothesis. The purpose of a hypothesis is to organize a study. A hypothesis is a statement that predicts the relationship between two things. In the case of this study, the hypothesis should describe a possible relationship between atmospheric carbon dioxide increase and climate. The level of carbon dioxide in the atmosphere changes depending on rates of energy use, industrialization and deforestation. Based on the present rates, carbon dioxide concentration may reach 560 parts per million over the next 100 years. This dramatic increase will result in twice the pre-industrial level of carbon dioxide. How might this affect the climate of Alaska, Northern Canada, and Greenland? Hypothesis: The climate of Alaska, northern Canada and Greenland will change as carbon dioxide levels increase to 560 parts per million over the next 100 years. Keeping this hypothesis in mind, run the climate model for Alaska, Northern Canada, and Greenland in the Data Center.		forward: Data Center back: Questions browse: Table of Contents
			forward: Data Center back: Questions

	Subscribe to the Earth Observatory About the Earth Observatory Contact Us Privacy Policy and Important Notices Responsible NASA Official: Lorraine A. Remer Webmaster: Goran Halusa We're a part of the Science Mission Directorate