Identify sources of information to use for your report on the ocean's climate. For example, read books such as "The Great Ocean Conveyor" by Wally Broecker or "Ocean Circulation and Climate" by Gerold Siedler and others. Visit expert websites such as those of the Environmental Protection Agency (EPA) or the Woods Hole Oceanographic Institution for further information.
Write an introduction to your report, explaining why the subject of the ocean's climate is so important. Then, introduce your thesis statement--the reason why you are writing the report. For example, choose to focus on three aspects of the topic, such as the history of the ocean's climate, causes for ocean climate change and consequences.
Make the first paragraph of your report's body elaborate on the history of the ocean's climate. Explain that the climate record for the past 100,000 years shows that the climate system has experienced periodic shifts, for example. Also, mention how the global average sea level in the past 125,000 years likely was higher than during the 20th century due to the retreat of polar ice in the wake of air temperature changes.
Describe what has caused the ocean's climate to change in your report body's second paragraph. For example, mention that carbon dioxide released by human activities are absorbed by the ocean, making the ocean more acidic. Explain how a buildup of industrial greenhouse gases warms the atmosphere and affects the ocean's temperature.
Mention the consequences of the ocean's climate change in the final paragraph of the report of your body, citing information from your references. For example, explain that the ocean's changing climate could make it harder for shell-forming organisms such as corals to form their shells. In addition, explain that thanks to climate changes water-dwelling periwinkle snails are expected to not be able to thicken their shells to protect themselves from crabs or that unusually warm ocean water bleaches and kills corals. Emphasize that fisheries, ecosystems and tourism will be affected by the ocean's climate changes.
Write a conclusion paragraph in which you reiterate your three points. Briefly explain why these three points are relevant to your audience and what you think can be done with this information. Include a list of all of your references on a separate page, and edit your report for spelling and grammar mistakes.