The observed changes in the climate system show that warming of the climate is unequivocal. Since the 1950s, many of the observed changes have been unprecedented over decades to millennia. The atmosphere and ocean have warmed, the amounts of snow and ice have diminished, sea level has risen, and the concentrations of greenhouse gases have increased. This video summarizes the IPCC 5th Assessment Report’s findings on the physical science basis for climate change.
According to the IPCC Working Group I report,
Fossil fuel combustion and other human activities are increasing the atmospheric CO2 levels to unprecedented rates. The graph in this video is an animated version of the standard Keeling curve from 1980 to September 2014.(Source: NASA: Atmospheric CO₂ Trends, Last accessed 11/14/2016)
EPA develops an annual report called the Inventory of U.S. Greenhouse Gas Emissions and Sinks. This report tracks total annual U.S. emissions and removals by source, economic sector, and greenhouse gas going back to 1990.
Released in April 2016, the key findings from the 1990-2014 U.S. Inventory are summarized here.
This video shows the mass change over the Antarctic Ice Sheet from January 2004 through June 2014. The color on the surface of the ice sheet shows the change in equivalent water height, while the graph overlay shows the total accumulated change in gigatons. (Source: NASA: GSFC MASCON Solution over Antarctica from January 2004 to June 2014, Last accessed 11/14/2016).
In this visualization, data from NASA's AMSR-E instrument captures the connected patterns of snow and sea ice cover in North America.
(Source: NASA: Snow Leads, Sea Ice Follows. Last accessed 11/14/2016.)
NOAA's module video on sea level rise discusses its causes and impacts, and challenges us to think about what we can do in response.
“Seas around the world have risen an average of nearly 3 inches since 1992, with some locations rising more than 9 inches due to natural variation, according to the latest satellite measurements from NASA and its partners. An intensive research effort now underway, aided by NASA observations and analysis, points to an unavoidable rise of several feet in the future.” (Source: https://svs.gsfc.nasa.gov/11978 Last accessed 7/6/2016)
This is a visualized graph of annual global temperatures with respect to a baseline from the 19th century, in Fahrenheit. “Earth's 2015 surface temperatures were the warmest since modern record keeping began in 1880, continuing a longterm warming trend. Most of the warming occurred in the past 35 years, with 15 of the 16 warmest years on record occurring since 2001. Last year was the first time the global average temperatures were more than 1 degree Celsius above the 1880-1899 average, a change largely driven by increased carbon dioxide and other human-made emissions into the atmosphere.” (Source: NASA Goddard Media Studios: Annual Global Temperature Change, Last accessed 11/14/2016.)