Planet Earth episode 3 1986 PBS television documentary.

"The Climate Puzzle" (aired February 5, 1986) – The episode examines the complexities of the Earth's climate. It explains how life adapts to extremes in climate and how changes in the climate have doomed past civilizations; the use of lake sediments, stalagmites, and cores of the ocean bottom and of polar ice to detect and track ancient changes in the Earth's climate; the Little Ice Age and Louis Agassiz's work in discovering the ice ages; Milutin Milanković's ideas about how the Earth's motions can trigger changes in climate; the contrast between the climates of Venus, Earth, and Mars and the possibility of Earth's climate one day becoming like that of Venus or Mars; modern civilization's release of carbon dioxide into the atmosphere, carbon dioxide's role as a greenhouse gas, and the possible effects of global warming on sea levels, storm surges, droughts and desertification, famine, temperatures, and green plant growth; plate tectonics, seafloor spreading, subduction, continental drift, and the role of volcanism in atmospheric carbon dioxide levels; methane's role as a greenhouse gas and the influence of termites on atmospheric methane levels; computer modeling of the prehistoric atmosphere and the climates resulting from it as it changed over time; and the possibilities for Earth's future climate. The episode visits the dry valleys and ice rivers of Antarctica; the site of the Harappan Civilization in the Rajasthan Desert on the Indian subcontinent; northern New Zealand; Switzerland; Barbados; Columbia University in New York City; the Hudson Valley in New York; Vostok Station; the Institute of Glaciology in Grenoble, France; the Mauna Loa Observatory in Hawaii; Venice, Italy; the National Center for Atmospheric Research in Boulder, Colorado; and Colorado's Lake Pueblo State Park.

Видео Planet Earth episode 3 1986 PBS television documentary. канала Petros Hatjopoulos