Comments by "mpetersen6" (@mpetersen6) on "The Mystery Of The Dark Age's Global Climate Disaster | Catastrophe | Timeline" video.

  1. Volcanic activity effects the climate in different ways. Large Stratovolcanoes, Krakatoa, Tambora, Pinatubo, Mazama etc can erupt explosively sending not only gas but ash into the upper atmosphere. Shield Volcanoes and Large Igneous Provinces, the Deccan Traps, the Siberian Traps, the Columbia River Basalts, Iceland, the North Atlantic Igneous Province, Kerguelan Plateau, Ontong-Jave Plateau and others over time do not erupt explosively as a general rule. There are exceptions. A major explosive eruption on Iceland in the late 1700s is one. In general a large explosive eruption results in a cooling period. This can be a year or two with minor cooling. In the case of an extremely large explosive eruption such as Toba or Yellowstone the effects can last decades. Large Igneous Provinces (LIPs) erupt in the form of flood basalts. These affect the climate differently. They expel large volumes of CO2, H2O and other gases. These gases will increase CO2 to much higher levels than today. 2000 ppm or higher. During the Miocene palm trees flourished in the Arctic. The whole of Earth had a tropical to sub-tropical climate. At this time there was a LIP in the Pacific Ocean that was sitting on a spreading center between the Fallaron and the now abducted Kula Plate. This LIP, called Siletzia , was formed by the Hot Spot currently under Yellowstone. Siletzia was active during the Miocene. This LIP was eventually over run by the North American Plate as an exotic terrane. It forms part of the Olympic Penisula of Washington. The Ontong-Java Plateau associated with the Louisville Hot Spot was active 120MYA with addition activity 90MYA. The Louisville Hot Spot is located approximately 140D West, 50D South. The Ontung-Java Plateau is currently in the area of 160D East, 5D North having moved East 60D and 55D North in the past 120MY. All of these LIPs can probably be related to periods of warm climate and the largest to extinction events.
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