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Scientists know that Earth’s climate has changed many times over billions of years and that Earth’s climate is always changing. Students will understand that climatologists are scientists that look for evidence from the past to help study climate change. This program also highlights the natural factors that affect climate change as well as the connection between the burning of fossil fuels and climate change. Part of the "Real World Science" series.
(Source: DCMP)
Elizabeth Hadly has been studying biodiversity in Yellowstone National Park for 30 years. Accompanied by biologist Sean Carroll, she demonstrates different ways in which climate change is impacting the park’s ecosystems. Bark beetles are surviving the winter at higher elevations and killing a large number of white-bark pine trees, disrupting the food web that includes squirrels and grizzly bears. Climate change is also causing ponds to dry up, reducing the pond habitat and decimating the local amphibian population. Although the park provides protected environments for animals, it is not immune from global threats like climate change.
Can trees really combat climate change? For eons, nature has relied on photosynthesis as a means to keep carbon dioxide levels from getting out of control. This episode discusses ways trees can help solve climate change. Part of the “It’s Okay to Be Smart” series.
Climate change may seem far away in some parts of the world, but for Pacific Islanders, its effects are very real. In August 2016, anthropologist Jennifer Newell led the Constantine S. Niarchos Expedition to the Marshall Islands. They examined how communities there are reacting to flooding, drought, and other effects of climate change.
Currently, cities have a fundamental role in the struggle against climate change and harmful environmental practices. But, at the same time, major global cities consume more than two thirds of the world’s energy and release seventy percent of the global emissions of carbon dioxide. Climate change has become part of the worldwide agenda for major cities as they develop policies and practices to protect the environment and reduce greenhouse gas emissions. Chapter 2 of Air: Climate Change Series.
Global warming is changing the intensity, duration, and frequency of precipitation. These changing climate patterns are altering the water cycle and negatively impacting the environment. As the climate of regions changes, life on earth is significantly impacted. The increased potential for flooding raises concerns over loss of life and property, and individual actions are critical to lessen global warming and climate change. Chapter 4 of Air: Climate Change Series.
Establishes the vital importance of the greenhouse effect for life on Earth. Presents a balanced argument to assess whether anthropogenic climate change-often called "global warming"-is in fact taking place. Offers clear arguments on both sides of the debate and illustrates both more economically developed countries and less economically developed countries. Provides a thorough and balanced examination of this important and often contentious issue.
One of the consequences of accelerating climate change is the alteration of rainfall patterns. This alteration is causing flash floods and severe drought in several global areas. The increase in droughts and flash floods is a source of global social problems and economic loses. Chapter 7 of Air: Climate Change Series.
One of the areas showing the greatest impacts of climate change is Antarctica. These impacts are significant because Antarctica serves as the regulator of global climate patterns and helps redistribute heat throughout the planet. Antarctica also greatly influences the circulation of the world’s oceans’ currents. Due to Antarctica’s influence on global climate patterns, scientists and other experts are working together to ensure the protection of Antarctica’s environment. Chapter 8 of Air: Climate Change Series.
Dr. Scott Wing spent a decade combing the hills in the Bighorn Basin of Wyoming to find fossil evidence of an extinction event that occurred in the Southern Ocean of Antarctica around 56 million years ago. In this episode, host Emily Graslie talks with him and Dr. Kirk Johnson about how studying the fossil record helps scientists better understand climate change. Part of "The Brain Scoop" series.
One of the areas that is most sensitive to climatic change is human health. Climate change affects human health in numerous ways. Some are immediate, and others may not manifest until future generations inhabit earth. Global areas have already begun to suffer the effects of ecosystem alterations and limited water sources. These situations also impact crop production and food distribution. Researchers also predict an increase in the number of displaced persons as the planet warms and sea levels begin to rise. Chapter 10 of Air: Climate Change Series.
Global warming is accelerating the melting of the world’s glaciers. The rate of glacial retreat has increased over the last hundred years due to global warming and the increase of greenhouse gas emissions. The increase in glaciers melting has significant impact on the water supply for many global communities. Glacial retreat also impacts world climate zones since glaciers help regulate the climate of the planet. However, scientists argue that it is not too late to reverse the effects of global warming in an effort to decrease the rate at which glaciers are melting. Chapter 11 of Air: Climate Change Series.
With help from the National Science Foundation, Cornell University’s Ornithology Lab is tracking bird breeding biology and the impact of climate change on bird populations. Some of the best information they are getting is from dedicated “citizen scientists” who provide critical data on what kinds of birds are nesting where, the number of eggs laid, and the number of chicks hatched.
Argentinean agriculture has one of the world’s highest productivity rates and is known for its soybean, corn and sunflower crops. However, the industry is also a significant contributor of greenhouse gas emissions. These climatic changes could in turn affect the productivity of the agricultural sector as well as impact economic aspects of the farmers’ lives. Chapter 3 of Air: Climate Change Series.
Welcome to Ruth Glacier, deep inside Alaska’s Denali National Park and Preserve. Some of the visitors are here for recreational activities, such as backcountry skiing, but this is no vacation for University of Maine paleoclimatologist Karl Kreutz and his team. For them, time on the ice is all part of the job. With support from the National Science Foundation, the scientists are working to reconstruct the climate history of this area over the last thousand years. Part of the National Science Foundation Series “Science Nation.”
Heat waves, cold waves, droughts and floods are all examples of extreme climatic events. These weather extremes are due in part to climatic change and cause society to ask numerous questions related to their impact on human life. How are these extreme events produced? What effects do they have? And how will a new climatic map on a global level affect humans? Chapter 12 of Air: Climate Change Series.
Energy has been essential for the development of human activities from the Industrial Revolution to present day. Over the course of history, human consumption of energy has increased significantly. Currently, society depends largely on nonrenewable energies that come from fossil fuels. However, the increase in greenhouse gas emissions has highlighted the need to change from fossil fuels to renewable energy sources that reduce environmental contamination. Many industries are committing to the development of alternative energy sources that don’t contribute to global warming. Chapter 9 of Air: Climate Change Series.
Polar bears are living on borrowed time. They are the descendants of grizzlies, long ago evolved to live and hunt on the frozen ice of the Arctic, eating a specialized diet of seal meat. But the winters have become increasingly warmer, the ice is disappearing, and raising a family becomes a much more difficult proposition when hunting time is short and food is scarce. Academy Award-winner F. Murray Abraham narrates.
With support from the National Science Foundation, Lake Ecologist Jasmine Saros and her team from the University of Maine are gathering diatoms from the lake waters of southwestern Greenland. They are using the diatoms in their studies of how climate change is affecting this Arctic ecosystem. Diatoms are a type of algae that responds rapidly to environmental change. Diatom species generally associated with warmer conditions are increasing at unprecedented rates in the sediment record.
Scientific evidence may show that human activity, particularly over the past 100 years, has led to a buildup of what are known as "greenhouse gases," the most common of which is carbon dioxide, in the atmosphere. Energy use, particularly the burning of fossil fuels and the large-scale removal of vegetation from the earth's surface, are thought to be largely responsible for greenhouse gas buildup.
Showing collections 1 to 5 of 5
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