Average U.S. precipitation has increased since 1900, but some areas have had increases greater than the national average, and some areas have had decreases. Global Change Research Program's Third Assessment Report, The IPCC's 2014 report on climate change impacts, adaptation and vulnerability, This website is produced by the Earth Science Communications Team at, Site Editor: Climate-related impacts are occurring across the … This video explains the findings of this study. This is the result of added water from melting land ice and the expansion of seawater as it warms. Decreased water availability will have economic and environmental impacts. Randal Jackson As a result, the ocean is becoming more acidic, affecting marine life. Science Editor: For example, at the end of the last ice age, when the Northeast United States was covered by more than 3,000 feet of ice, average temperatures were only 5 to 9 degrees cooler than today. Below are some of the impacts that are currently visible throughout the U.S. and will continue to affect these regions, according to the Third3 and Fourth4 National Climate Assessment Reports, released by the U.S. In some regions, particularly in the western United States, drought is an important factor affecting communities. A visualization of global temperature changes since 1880 based on NASA GISS data. Climate change affects many of the the social and environmental determinants of health – clean air, safe drinking water, sufficient food and secure shelter. The impacts of human-induced climate change are increasing nationwide. Summer temperatures are projected to continue rising, and a reduction of soil moisture, which exacerbates heat waves, is projected for much of the western and central U.S. in summer. This collection provides teachers and students with opportunities to explore some of the environmental changes that are taking place. Scientists have high confidence that global temperatures will continue to rise for decades to come, largely due to greenhouse gases produced by human activities. Impacts from climate change are happening now. Global Change Research Program: Northeast. Because human-induced warming is superimposed on a naturally varying climate, the temperature rise has not been, and will not be, uniform or smooth across the country or over time. Earth's ice cover is shrinking. Hurricane-associated storm intensity and rainfall rates are projected to increase as the climate continues to warm. The intensity, frequency and duration of North Atlantic hurricanes, as well as the frequency of the strongest (Category 4 and 5) hurricanes, have all increased since the early 1980s. NASA visualizations of future precipitation scenarios, NASA: Megadroughts in U.S. West projected to be worst of millennium. The International Monetary Fund views climate change as a fundamental risk to economic and financial stability, its chief said on Monday, mapping out the IMF's plans to help focus investments … Two degrees may sound like a small amount, but it's an unusual event in our planet's recent history. Less snow accumulation in the mountains is important in the West and Alaska, where the snowpack stores water for later use. Sea levels are rising and oceans are becoming warmer. … Rising sea levels due to thermal expansion and melting land ice sheets and glaciers put coastal areas at greater risk of erosion and storm surge. Holly Shaftel Three main levels of climate change impact. Much of this melting ice contributes to sea-level rise. Explore a stunning gallery of before-and-after images of Earth from land and space that reveal our home planet in a state of flux. The changing environment is expected to cause more heat stress, an increase in waterborne diseases, poor air quality, and diseases transmitted by insects and rodents. Projected impact of climate change on yields of corn, wheat, soybeans and cotton by the years 2080-2099. One of the most serious impacts of climate change is how it will affect water resources around the world. Declining water supplies, reduced agricultural yields, health impacts in cities due to heat, and flooding and erosion in coastal areas are additional concerns. Climate change is affecting the American people in far-reaching ways. Susan Callery Droughts in the Southwest and heat waves (periods of abnormally hot weather lasting days to weeks) everywhere are projected to become more intense, and cold waves less intense everywhere. Increasing wildfire, insect outbreaks and tree diseases are causing widespread tree die-off. Earth's climate record, preserved in tree rings, ice cores, and coral reefs, shows that the global average temperature is stable over long periods of time. Our food supply depends on climate and weather conditions. Extreme heat will affect health, energy, agriculture and more. Global sea level has risen by about 8 inches since reliable record keeping began in 1880. In addition to these resources, NOAA offers professional development opportunities (including the Planet Stewards Program) about climate and other topics. "Taken as a whole," the IPCC states, "the range of published evidence indicates that the net damage costs of climate change are likely to be significant and to increase over time." Changes in some types of natural hazards have already been … Climate change is a significant threat to the health of the American people. According to a new NASA study, a string of nine years without a major hurricane landfall in the U.S. is Iikely to come along only once every 177 years. 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