You are browsing the archive for climate change Archives - AGU Blogosphere.

25 August 2016

176 Years of Global Temperatures in One Image

From Ed Hawkins at The Univ, of Reading. The visualisation technique of ‘small multiples’ is often used to communicate a simple message. The above example shows maps of temperature change from 1850-2016 – the overall warming trend is obvious even though the details are fuzzy. Technical details: The HadCRUT4.4 dataset is used with anomalies from a 1961-1990 baseline period. An annual average for a particular grid cell and year is …

Read More >>


18 August 2016

NOAA Data Confirms NASA and Japan: July 2016 was Hottest on Record.

From NOAA: For the 15th consecutive month, the global land and ocean temperature departure from average was the highest since global temperature records began in 1880. This marks the longest such streak in NOAA’s 137 years of record keeping. The July 2016 combined average temperature over global land and ocean surfaces was 0.87°C (1.57°F) above the 20th century average, besting the previous July record set in 2015 by 0.06°C (0.11°F). …

Read More >>


17 August 2016

You’ll See More and More About Climate on TV Weathercasts. Here’s Why.

I’ve written about this subject many times here, but here is a nice video (from Peter Sinclair, and Yale Climate connections) explaining why broadcast meteorologists around the country can no longer ignore the changing climate.   You may recognize a few of us, depending on where you live.

Read More >>


15 August 2016

Another Melted Record- NASA Says July Hottest Month Ever Measured on Earth

From Gavin Schmidt at NASA on Twitter this afternoon: Every month in 2016 has set a new record in the NASA data, but July 2016 was not just a record for July, it was the hottest month recorded. NOAA data comes out later this week (They do an independent analyses). Raw data is here: GLOBAL Land-Ocean Temperature Index in 0.01 degrees Celsius base period: 1951-1980 sources: GHCN-v3 1880-07/2016 + SST: …

Read More >>


14 August 2016

Catastrophic Flood Event Underway In Louisiana

Thousands of people have been rescued, and thousands of others are trapped by flood waters in Louisiana tonight, as over 20 inches of rain fell starting early Friday and through the weekend. I’m going to post various images/data to put some context into what/why this is happening. These floods are not yet over, and the threat is now increasing in parts of Missouri and Illinois, where up to 6 inches …

Read More >>


4 August 2016

Earlier snowmelt carries drastic consequences for forests

Earlier snowmelt periods associated with a warming climate may hinder subalpine forest regulation of atmospheric carbon dioxide.

Read More >>


3 August 2016

Researchers make first map of thawed areas under Greenland Ice Sheet

NASA researchers have helped produce the first map showing what parts of the bottom of the massive Greenland Ice Sheet are thawed – key information in better predicting how the ice sheet will react to a warming climate. Knowing whether Greenland’s ice lies on wet, slippery ground or is anchored to dry, frozen bedrock is essential for predicting how this ice will flow in the future, but scientists have very few direct observations of the thermal conditions beneath the ice sheet.

Read More >>


2 August 2016

State of the Climate 2015 Report Released

Every year at this time the Bulletin of the American Meteorological Society publishes the State of the Climate Report. While it will be in the AMS Bulletin that all AMS members receive, the entire report is freely available to the public here: https://www.ametsoc.org/ams/index.cfm/publications/bulletin-of-the-american-meteorological-society-bams/state-of-the-climate/ From the report: The 2015 global surface temperature was 0.42oC-0.46oC (0.76°–0.83°F) above the 1980-2010 average, depending on the dataset. For the troposphere, 2015 ranked between first and …

Read More >>


1 August 2016

Third Severe Flash Flood In July Hits Maryland/Delaware

The month of July brought 4 major flash flood events to my area. One was very close with over 5 inches of rain where I live in Salisbury,Md. and over 7 inches just to our west. The other was near Seaford in Delaware (and extended into Maryland), and another just south on the Eastern Shore of Virginia, where over 9 inches of rain fell in Accomack County. Then came Saturday night, across …

Read More >>


21 July 2016

NOAA Releases June Global Climate Data; 378th Consecutive Month Above Normal!

When science wants to find something out, they tend to work in independent teams to do it. If all teams get the same results, this increases the confidence that the science is good. The most famous case of this is the discovery that the Universe was not only expanding, but that the expansion was speeding up. When it comes to the global temperatures, there are 4 main groups. NASA GISS, …

Read More >>


19 July 2016

NASA- June 2016 is 6th Month in A Row That’s Hottest On Record.

The NASA global temp. data came out today, and for the 6th month in a row the planet broke a heat record. Here is more from NASA: 2016 Climate Trends Continue to Break Records Two key climate change indicators — global surface temperatures and Arctic sea ice extent — have broken numerous records through the first half of 2016, according to NASA analyses of ground-based observations and satellite data. Each …

Read More >>


17 July 2016

What Not To Do During The Heat Wave Next Week!

There is very high agreement in the medium range models this morning that an intense heat wave will build across the Eastern U.S. this coming week. It will begin in the Plains on Tuesday, and get much stronger by Wednesday, spreading highs above 100 into the Dakotas and Minnesota. It will then steadily shift eastward, reaching the Northeast and Mid-Atlantic by Friday, and over the weekend. The oceans globally (and …

Read More >>


15 July 2016

Drought caused the Amazon to stop storing carbon

The most extensive land-based study of the effect of drought on Amazonian rainforests to date has shown that a recent drought completely shut down the Amazon Basin’s carbon sink. Previous research has suggested that the Amazon – the most extensive tropical forest on Earth – may be gradually losing its capacity to take carbon from the atmosphere. This new study paints a more complex picture, with forests responding dynamically to an increasingly variable climate.

Read More >>


13 July 2016

Large-scale reforestation could lead to slight reduction in global warming

Planting new forests could contribute more to the mitigation of climate change than previously thought, according to a new study. This is due to the combined effect of land use changes and the enhanced carbon uptake of the terrestrial biosphere in a warm and high carbon dioxide climate, according to the study’s authors.

Read More >>


Is Your Local Weather Reporter Afraid to Mention The Climate Elephant?

Jason Samenow over at Capital Weather Gang (Washington Post) has a great piece today, and it has led to a wide discussion among broadcast meteorologists. I’ve written before about this subject, and while coverage of climate issues has increased dramatically over the past few years, there are some on air forecasters who for one reason or another are loathe (or even forbidden) to mention it. One station in Little Rock …

Read More >>


11 July 2016

Climate tipping points: What do they mean for society?

The phrase “tipping point” passed its own tipping point and caught fire after author Malcolm Gladwell’s so-named 2000 book. It’s now frequently used in discussions about climate change, but what are “climate tipping points”? And what do they mean for society and the economy?

Read More >>


30 June 2016

Electric forces in desert air create mighty dust storms, study finds

Electric fields in dust storms have been discovered lifting 10 times more dust into the air than winds alone, according to new experiments conducted in the Sahara Desert. The discovery has big implications for global climate studies, as well as for understanding dust storms on Mars.

Read More >>


29 June 2016

31 Scientific Societies Send Congress Letter on Climate Change. It pulls no punches.

A letter signed by the directors of over 30 different scientific societies was sent to the Congress this week. The AGU, and the American Meteorological Society, were among the signers. Jason Samenow at the Washington Post has a piece on this as well today. Research by Ed Maibach at George Mason Univ., and others at the Yale Program on Climate Change, indicates that the number of those who dismiss climate …

Read More >>


28 June 2016

Climate change causing oceanic boundary currents to intensify and shift poleward

Weather along the eastern coasts of South Africa, Asia, Australasia and South America will get significantly warmer and stormier on average over the next 100 years, a new study finds. The culprit? Climate changes that are causing ocean currents next to these coastal regions, called western boundary currents, to become stronger and extend further toward the poles, according to the new study.

Read More >>


27 June 2016

Capping warming at 2 degrees: New study details pathways beyond Paris

Even if countries adhere to the Paris climate agreement hammered out last fall, capping global warming at 2 degrees Celsius (4 degrees Fahrenheit) would likely require net zero greenhouse gas emissions by 2085 and substantial negative emissions over the long term, according to an in-depth analysis by scientists at the National Center for Atmospheric Research (NCAR) in Boulder, Colorado.

Read More >>