Global Warming - NASA Earth Observatory
Global Warming. Throughout its long history, Earth has warmed and cooled time and again. Climate has changed when the planet received more or less sunlight due to subtle shifts in its orbit, as the atmosphere or surface changed, or when the Sun’s energy varied.
Global Warming - NASA Earth Observatory
Global warming will shift major climate patterns, possibly prolonging and intensifying the current drought in the U.S. Southwest. The white ring of bleached rock on the once-red cliffs that hold Lake Powell indicate the drop in water level over the past decade—the result of repeated winters with low snowfall.
World of Change: Global Temperatures - NASA Earth …
Air temperatures on Earth have been rising since the Industrial Revolution. While natural variability plays some part, the preponderance of evidence indicates that human activities—particularly emissions of heat-trapping greenhouse gases—are mostly responsible for making our planet warmer.. According to an ongoing temperature analysis led by scientists at …
Global Warming - NASA Earth Observatory
Global warming is happening now, and scientists are confident that greenhouse gases are responsible. To understand what this means for humanity, it is necessary to understand what global warming is, how scientists know it's happening, and how they predict future climate.
Climate Q&A - What can we do about global warming?
Science suggests that to mitigate the human contribution to global warming, we should reduce carbon dioxide and other greenhouse gas emissions. Because some additional warming is inevitable—even if we achieve significant greenhouse gas reductions quickly—we should make plans to adapt to coming ...
Climate Q&A - Why is global warming a problem? - NASA …
2010年7月6日 · The cost and benefits of global warming will vary greatly from area to area. For moderate climate change, the balance can be difficult to assess. But the larger the change in climate, the more negative the consequences will become. Global warming will probably make life harder, not easier, for most ...
2021 Continued Earth’s Warming Trend - NASA Earth …
2022年1月13日 · “Science leaves no room for doubt: Climate change is the existential threat of our time,” said NASA Administrator Bill Nelson. “Eight of the top 10 warmest years on our planet occurred in the last decade, an indisputable fact that underscores the need for bold action to safeguard the future of our country and all of humanity.”
Global Warming - NASA Earth Observatory
To further explore the causes and effects of global warming and to predict future warming, scientists build climate models—computer simulations of the climate system. Climate models are designed to simulate the responses and interactions of the oceans and atmosphere, and to account for changes to ...
Articles - NASA Earth Observatory
2024年7月1日 · climate change, global climate change, global warming, natural hazards, Earth, environment, remote sensing, atmosphere, land processes, oceans, volcanoes, land cover ...
Global Warming Mapped - NASA Earth Observatory
2001年1月1日 · The average global temperature has increased by about 0.8°Celsius since 1880, and two-thirds of the warming occurred after 1975. Image of the Day for December 10, 2010