Climate Change

A scientific look at global change.
Climate Change Evidence At A Glance
Global Surface Temperature
Data source: NOAA
Atmospheric CO2
Data source: NOAA
thousands of years ago
Sea Level
Data source: CLS/Cnes/Legos
Arctic Sea Ice (September)
Surface Temperature CO2 Sea Level Sea Ice
Climate Change News
By Terrell Johnson
July 28, 2015
Periods of extreme drought, when they last long enough, can push societies to the breaking point. Here are four places around the world where that's happening today.
By Climate Central
July 27, 2015
Since climate change is expected to usher in more oppressive heat waves, the number of days with stagnant air will likely go up.
By Terrell Johnson
July 27, 2015
This lake in Canada's Northwest Territories is set to fall off a cliff and send flash floods and debris into the valley below, thanks to global warming.
Feeling Skeptical?
Climate Change Facts
Local Climate Change
Temperature Precipitation Snowfall*

Climate Change Blogs

Record Ocean Temperatures Threaten Hawaii's Coral Reefs
By: Dr. Jeff Masters
Published: 24 juillet 2015
Record warm sea surface temperatures in Hawaii's waters threaten to bring a second consecutive year of record coral bleaching to their precious coral reefs this summer. According to NOAA, ocean temperatures in the waters near and to the south of the Hawaiian Islands were 1 - 2°C (1.8 - 3.6°F) above average in June, which was the warmest these waters have been since record keeping began over a century ago.
Fewer but Stronger Global Tropical Cyclones Due to Ocean Warming
By: Dr. Jeff Masters
Published: 23 juillet 2015
The observed 0.3°C (0.5°F) warming of Earth's oceans over the past 30 years has made more energy available to tropical cylones, leading to an average increase in wind speed of about 3 mph (1.3 m/s) for each storm--but 6.1 fewer named storms globally each year because of the warmer oceans.
State of the Climate Report: Warm and Warmer (except for eastern North America)
By: Dr. Jeff Masters
Published: 17 juillet 2015
The 2014 State of the Climate makes it plain that last year was a landmark in global warming. The record high in globally averaged temperature (a mark almost certain to be topped in 2015) got plenty of press, but other records were set as well.
Wunderground's Climate Change Position
Based on the evidence, more than 97% of climate scientists have concluded that human-caused climate change is happening. Climate change is already causing significant impacts to people and ecosystems, and these impacts will grow much more severe in the coming years. We can choose to take economically sensible steps to lessen the damage of climate change, and the cost of inaction is much higher than the cost of action.
Climate Summary
State of the Climate
June 2015: Earth's Warmest June on Record

June 2015 was Earth's warmest June since global record keeping began in 1880, said NOAA and NASA. June 2015's warmth makes the year-to-date period (January - June) the warmest such period on record, and 2015 is likely to be Earth's 2nd consecutive warmest year on record.