News, Interviews & Commentaries

2015 was hottest year in recorded history (Jaunary 21, 2016)

Today Online discusses how 2015 was the hottest year in recorded history in the world and the second-warmest on record for the continental United Sates. Dr. Michael Mann was quoted. Read more...

Is 1.5-degree Celsius achievable? (January 11, 2016)

Rony V. Diaz from The Manila Times, dicsusses ways countries can reduce their carbon emissions to avoid a global increase of 2 degrees celsius.

How Close Are We to ‘Dangerous’ Planetary Warming?

In the wake of the COP 21 UN Climate Summit in Paris (see this recent Huffington Post piece for my take on the agreement), a number of important questions still remain unanswered.

The Assault on Climate Science

With world leaders gathered in Paris to address climate change, most of the planet seems to have awakened to the reality that the Earth is warming and that we’re responsible.

Meeting a Global Carbon Limit Is Cheaper Than Avoiding One

The world can still avoid dangerous global warming if it acts fast.

COP21: Can we avoid climate apocalypse?

It's probably the most important number you've never heard of: 2 degrees Celsius. That's when climate change starts to get especially dangerous. Nearly every country in the world has...

Fire and Ice: What I Did On My Summer Vacation

I did my best to get away from work last week while my family and I were on vacation visiting friends who live in Kalispell, the gateway to Montana’s Glacier National Park. But it wasn’t...

Earth Will Cross the Climate Danger Threshold by 2036

The rate of global temperature rise mayhave hit a plateau, but a climate crisis still looms in the near future

Global Warming Speed Bump? The Answer May Be Blowing in the Wind!

The fact that global surface temperatures have not increased as much over the past decade as many climate models predict they should have, doesn’t necessarily contradict the model predictions...

Approving Keystone XL could be the biggest mistake of Obama's presidency

A State Department report fails to take into account the full climate impacts of Keystone XL. Who is Obama protecting?

If You See Something, Say Something

The overwhelming consensus among climate scientists is that human-caused climate change is happening. Yet a fringe minority of our populace clings to an irrational rejection of well-established...

Super Typhoon Haiyan and the Realities of a Warmed World

Super Typhoon Haiyanhas only just passed, and the devastation cannot yet even be fully understood. (With that in mind, please consider a donation to an assisting charity, such as the Philippine Red...

Climate-Change Deniers Must Stop Distorting the Evidence

It happens every six years or so: The Intergovernmental Panel on Climate Change (IPCC) publishes its assessment of the current state of scientific understanding regarding human-caused climate change...

Reality and threats of climate change are clear

Attorney General Ken Cuccinelli certainly has some odd characters coming to his defense in this paper for his attempts to go after climate scientists like myself.

Climate scientists and smear campaigns

Imagine you are sitting in your office simply doing your job and a nasty e-mail pops into your inbox accusing you of being a fraud. You go online and find that some bloggers have written virulent...

A science-free Congress?

To our dismay, and the nation’s detriment, self-described climate change deniers – strongly supported by fossil-fuel interests — continue to mislead Congress and the public. In...

Get the anti-science bent out of politics

As a scientist, I shouldn't have a stake in the upcoming midterm elections, but unfortunately, it seems that I -- and indeed all my fellow climate scientists -- do.

It's the Critics of Warming Who Lack Credibility

Patrick J. Michaels spreads falsehoods and innuendo against mainstream climate scientists and he questions the integrity of various institutions including my own, Penn State University, simply...

E-mail furor doesn't alter evidence for climate change

I cannot condone some things that colleagues of mine wrote or requested in the e-mails recently stolen from a climate research unit at a British university. But the messages do not undermine the...

The 'Greatest Hox' Strikes Florida (October 10, 2018)

Check out this must-read The New York Times column from Nicholas Kristof.