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 By Lorraine Boissoneault
September 30, 2013
For hundreds of years the Temple of Dawn stupa has been a glistening tower jutting into the skyline of Bangkok, Thailand, but a combination of air pollution and extreme weather events are forcing officials to close the temple off for three years worth of renovations and repairs.
By Angela Fritz
September 27, 2013
A heavyweight boxer in the climate change match is missing from the 5th climate assessment report released by the Intergovernmental Panel on Climate Change on Friday.
By Karl Ritter
September 27, 2013
Scientists can now say with extreme confidence that human activity is the dominant cause of global warming observed since the 1950s.
Feeling Skeptical?
Climate Change Facts
Local Climate Change
Temperature Precipitation Snowfall*

Climate Change Blogs

California Drought/Polar Vortex Jet Stream Pattern Linked to Global Warming
By: Dr. Jeff Masters
Published: April 16, 2014
From November 2013 - January 2014, a remarkably extreme jet stream pattern set up over North America, bringing the infamous "Polar Vortex" of cold air to the Midwest and Eastern U.S., and a "Ridiculously Resilient Ridge" of high pressure over California, which brought the worst winter drought conditions ever recorded to that state. A new study by Utah State scientist S.-Y. Simon Wang found that this jet stream pattern was the most extreme on record, and likely could not have grown so extreme without the influence of human-caused global warming.
IPCC: Cost of Avoiding Dangerous Climate Change Super-Affordable if We Act Now
By: Dr. Jeff Masters
Published: April 13, 2014
Climate change is a huge threat to civilization if we do nothing more to reduce it, but the costs are very affordable if we start now, said the Nobel-prize winning Intergovernmental Panel on Climate Change (IPCC) today, in the third installment of their once-every-seven-years report on the climate. Today's report on mitigation--how we can slow down climate change--found that the cost of keeping global warming under the "dangerous" level of 2°C will only reduce "consumption growth" of the global economy by 0.06% per year if we start immediately and act strongly. Consumption growth is expected to increase between 1.6% and 3% per year in the coming decades.
Energy, Food, Population and Climate
By: Dr. Ricky Rood
Published: April 9, 2014
We are therefore even in the best of cases committed to further increases in carbon dioxide emissions, as well as emissions of other greenhouse gases. The ultimate way to limit warming is to reduce emissions, which requires energy sources and food supplies that do not emit greenhouse gases. At this point we are not even offsetting carbon dioxide emissions by our adoption of renewables. It is interesting to note that China, now the world’s largest emitter, is also the world’s largest investor in renewable energy. Also noteworthy, is that China has driven down the price of solar energy. This places China in not only a potential technological advantage, but is also building policy advantage, as China is on a path that might displace coal’s role in energy production.
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
February 2014: Earth's 21st Warmest February on Record

February 2014 was the globe's 21st warmest February since records began in 1880, according to NOAA's National Climatic Data Center (NCDC), and 17th warmest, according to NASA. Relative to average, February 2014 was Earth's coolest month in two years. February 2014 global land temperatures were the 44th warmest on record, and global ocean temperatures were the 7th warmest on record.