Key Findings Of National Climate Assessment
Below is a portion of the introduction of the new National Climate Assessment which summarizes how climate change is already impacting us:
Climate change, once considered an issue for a distant future, has moved firmly into the present. Corn producers in Iowa, oyster growers in Washington State, and maple syrup producers in Vermont are all observing climate-related changes that are outside of recent experience. So, too, are coastal planners in Florida, water managers in the arid Southwest, city dwellers from Phoenix to New York, and Native Peoples on tribal lands from Louisiana to Alaska. This National Climate Assessment concludes that the evidence of human-induced climate change continues to strengthen and that impacts are increasing across the country.
Americans are noticing changes all around them. Summers are longer and hotter, and extended periods of unusual heat last longer than any living American has ever experienced. Winters are generally shorter and warmer. Rain comes in heavier downpours. People are seeing changes in the length and severity of seasonal allergies, the plant varieties that thrive in their gardens, and the kinds of birds they see in any particular month in their neighborhoods.
Other changes are even more dramatic. Residents of some coastal cities see their streets flood more regularly during storms and high tides. Inland cities near large rivers also experience more flooding, especially in the Midwest and Northeast. Insurance rates are rising in some vulnerable locations, and insurance is no longer available in others. Hotter and drier weather and earlier snow melt mean that wildfires in the West start earlier in the spring, last later into the fall, and burn more acreage. In Arctic Alaska, the summer sea ice that once protected the coasts has receded, and autumn storms now cause more erosion, threatening many communities with relocation.
Scientists who study climate change confirm that these observations are consistent with significant changes in Earth’s climatic trends. Long-term, independent records from weather stations, satellites, ocean buoys, tide gauges, and many other data sources all confirm that our nation, like the rest of the world, is warming. Precipitation patterns are changing, sea level is rising, the oceans are becoming more acidic, and the frequency and intensity of some extreme weather events are increasing. Many lines of independent evidence demonstrate that the rapid warming of the past half-century is due primarily to human activities.
The observed warming and other climatic changes are triggering wide-ranging impacts in every region of our country and throughout our economy. Some of these changes can be beneficial over the short run, such as a longer growing season in some regions and a longer shipping season on the Great Lakes. But many more are detrimental, largely because our society and its infrastructure were designed for the climate that we have had, not the rapidly changing climate we now have and can expect in the future. In addition, climate change does not occur in isolation. Rather, it is superimposed on other stresses, which combine to create new challenges.
The 5 Scariest Charts In The New National Climate Assessment
The U.S. federal government released its third National Climate Assessment on Tuesday, emphasizing that climate change is not only an issue for the distant future. It is already “triggering wide-ranging impacts in every region of our country and throughout our economy,” they write. The Huffington Post’s Kate Sheppard explains:
The full report, at more than 800 pages, is the most comprehensive look at the effects of climate change in the U.S. to date, according to its authors. (Even the “highlights” document provided to reporters the day before the release weighed in at 137 pages). The report includes regional and sectoral breakdowns of current and anticipated impacts, which have implications for infrastructure, agriculture, human health, and access to water.
Among the report’s findings in the highlights document are these five eye-opening charts which reveal how much things have changed in recent decades and what we might expect later this century.
1. We’re Seeing More Heavy Precipitation Than We Used To
2. It’s Gotten Warmer Almost Everywhere
3. We’re Seeing A Lot Of 100-Degree Days
4. Drought Is Becoming A Major Problem For Much Of The Country
5. Business As Usual = More Temperature Rise