A new study by the U.S. Global Climate Research Program, as part of the National Climate Assessment, shows far-reaching impacts already occurring across the U.S. from climate change. This reports lays out current impacts in stark, clear terms. This report is based on the work of 300 scientists and 60 review panels.
The report states: “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.”
Major points include:
— The draft report notes that average temperature in the US has increased by about 1.5F (0.8C) since 1895, with more than 80% of that rise since 1980. The last decade was the hottest on record in the US.
— Global climate is changing 10 times faster than natural rates.
— Parts of the country are getting wetter, other parts are getting drier. All areas are getting hotter reported US Geological Survey.
This report looks at ten datasets for indicators such as glacier melting, sea temperatures, sea level, snow cover and land temperature, among other things. This complex series of indicators all point to sustained, unmistakable climate change.
Some other key charts and datapoints from the study include drastic changes in rainfall intensity in the northeast U.S., sea level rise, and significant reduction in the number of frost free days, which means a longer growing season, and steadily warming land temperatures.
The climate change debate in the U.S. gets bogged down on the causes of climate change, with deniers stressing that human fossil fuel use is not the cause. This report provides the obligatory data that shows temperature increases due to human factors.