Discovering Ancient Climates in Ocean & Ice | Rob Dunbar |

Summary
What Dunbar discussed in this lecture was sea level rise, ocean warming and ocean acidification. He also explained the environmental conditions revealed by marine sediments and the negative effects that carbon dioxide has on the ocean. It was easier for me to understand how sediment works and how he went upon researching it. When he talked about carbon dioxide and the negative effects it has on the ocean I was shocked. I did not know greenhouse gases could affect shells and corals in the ocean. I also did not know that it can decrease marine life. He also talked about the dangers of low sea level islands and how high sea level waters can affect them. Dunbar also explained how El Nino affected the ocean. He briefly explained that El Nino warmed up the ocean by a few degrees Celsius and temporarily changed the world’s climate. Furthermore, What I also found interesting was how he sampled corals. He would sample corals to figure out the temperature of the ocean. Dunbar would use a diamond drill, send fragments of limestone back to a lab and analyze the temperature of the ocean. In conclusion, the lecturer explained the danger of how sea level rise can affect low sea level islands, he talked about ocean warming and he talked about how acid affects the ocean

Reflections
One idea that I found interesting about the lecture was concerning billions of tons of carbon dioxide (CO2) and other greenhouse gases going into the Earth’s atmosphere and dissolving into ocean. That’s 22 million tons of human-created CO2 emissions a day being absorbed into the ocean! When Dunbar explained the effects of CO2 and how it impacts on marine life, I was stunned. I did not know that direct effects from carbon dioxide to carbonated producers can dissolve shells, reduce oceans pH units, and decrease