The University of Arizona

global climate

CO2 Concentrations to Surpass 400ppm

Date Posted: 
May 5, 2013
Publisher: 
Scripps Institution of Oceanography

Atmospheric carbon dioxide emissions will soon pass 400 parts per million (ppm), up from 316 ppm in 1958 when modern record keeping began and an estimated 280 ppm at the start of the Industrial Revolution, according to the Scripps Institution of Oceanography at University of California, San Diego.

Scientists Confirm Recent Warming Trend Due to Humans

Date Posted: 
April 25, 2013
Publisher: 
Nature Geoscience

Natural variability alone cannot explain the recent (past century) warming trend, confirms a new study published in Nature Geoscience.

Precipitation Cycle Enhanced in Recent Years

Date Posted: 
March 14, 2013
Publisher: 
Nature Geoscience

The annual range of precipitation has increased across the globe, mostly due to the fact that wet seasons have become wetter, according to a new study published in Nature Geoscience.

Temperatures by 2100 Will Exceed Those of the Past 11,300 Years

Date Posted: 
March 14, 2013
Publisher: 
Science

By the year 2100, surface temperatures will exceed those of the Holocene (the past about 11,300 years), according to new research published in Science.

2012 Global Temperatures Rank in Top Ten Warmest

Date Posted: 
January 18, 2013
Publisher: 
NOAA/Climatic Change

Last year was the 10th warmest year for the globe since records began in 1880, making it the 36th consecutive year in which global temperatures were above average, according to a recent analysis by NOAA. What’s more, all 12 years in the 21st century have been among the 14 warmest years on record, with 2010 and 2005 ranking as warmest and second warmest, respectively.

Two-Degree Warming Target Unreachable

Date Posted: 
November 7, 2012
Publisher: 
PricewaterhouseCoopers LLP

The goal of limiting global warming to 2 degrees C (3.6 degrees F) is highly unrealistic, according to a new analysis by the UK based firm PricewaterhouseCoo

Climate Change Costs Trillions Annually

Date Posted: 
September 28, 2012
Publisher: 
DARA/Climate Vulnerable Forum

Climate change costs the world $1.2 trillion, or 1.6 percent of global GDP, per year, according to a new report by DARA, a European nongovernmental organization, and the Climate Vulnerable Forum, a semi-formal government group made up of developing countries.

Global Temperatures Rose 2.7 Degrees F Since 1753

Date Posted: 
August 3, 2012
Publisher: 
Berkeley Earth

A new study, conducted by Richard Muller (a known climate change denier) and other scientists from Berkeley Earth, shows that the Earth has warmed about 2.7 degrees F in the last 250 years, and that this warming closely follows carbon dioxide concentrations.

May Global Temperatures Second Warmest on Record

Date Posted: 
June 22, 2012
Publisher: 
NOAA

The average global temperature in May was the second warmest on record, with a combined global land and ocean surface temperature of 1.19 degrees F above the 20th century average, according to the newest State of the Climate from NOAA.

Global Ecosystem Nearing Tipping Point

Date Posted: 
June 8, 2012
Publisher: 
Nature/UNEP

Two new reports warn the world is on an unsustainable path and is moving towards a ‘tipping point’.