CU Extreme Wx Blog

S2S Workshop

by | December 13, 2016 | 1 Comment

By Zane Martin Last week hundreds of scientists from around the world attended the Workshop on Sub-seasonal to Seasonal Predictability of Extreme Weather and Climate online and at Columbia University’s bucolic Lamont-Doherty Earth Observatory. Organized by Columbia’s International Research Institute for Climate and Society (IRI) and Initiative on Extreme Weather and Climate, in conjunction with the WWRP/WCRP Sub-seasonal to […]

Sustainable Development and Collaborative Governance in NYC

by | November 18, 2016

On Thursday November 17, 2016 the Conference on Sustainable Development and Collaborative Governance took place at Laguardia Community College. Sponsored by Governor Cuomo, the conference presented many different concepts on how New York State as a whole and more specifically New York City can reap the benefits of becoming leaders in sustainability and resilience. The […]

Climate Risk and National Security: People not Polar Bears

by | September 23, 2016 | 1 Comment

On Thursday, September 22nd, the Initiative on Extreme Weather and Climate hosted its biggest seminar to date. To an audience of over 100 people, Dr. David Titley presented Climate Risk and National Security: People not Polar Bears. Titley, a retired Rear Admiral in the US Navy who is now a Professor of Practice in Meteorology […]

Severe convection and tropical cyclone risk: Collaborations between academia and industry

by | August 2, 2016
Category: Uncategorized

The Initiative held two events this spring which have been written up in documents now available online. Our Severe Convection and Climate Workshop, held on March 9-10, 2016, is described in detail in a report lead-authored by John Allen (formerly of IRI, now an Assistant Professor at Central Michigan University) for the Bulletin of the American […]

Lamont: Assessing Extreme Weather Risk

by | March 23, 2016
Category: Uncategorized

In Lamont’s 2015 Annual Report, an article by Stacy Morford summarizes some of the research on climate and extreme weather risk going on at Lamont.

Rapidly intensifying hurricanes and bunched-up tornadoes

by | March 4, 2016
Category: Uncategorized

Two recent papers in Nature Communications by Columbia researchers focus on properties that emerge when one analyzes the statistical distributions of two different types of severe storms – tropical cyclones and tornadoes. Both highlight the most extreme instances of these already extreme events, and find surprising behavior in both, though in quite different ways. The first paper, […]

Spontaneous clumping of tropical clouds

by | July 23, 2015 | 1 Comment
A cluster of towering cumulus clouds off the coast of El Salvador. This photograph was taken on May 31, 2002, from the International Space Station. Image courtesy of the Earth Science and Remote Sensing Unit, NASA Johnson Space Center, at http://eol.jsc.nasa.gov [Photo ID ISS004-E-12656]

If you take a look at nearly any satellite image of clouds in the tropics (for example, the GOES west geostationary satellite image from a few days ago), you’ll notice that convective clouds (the tall thunderstorm clouds associated with strong circulations) tend to be organized into clusters. This clustering ranges from features such as squall […]

First Extremes Workshop: Mission Accomplished

by | May 8, 2015

Our workshop, Extreme Weather and Climate: Hazards, Impacts, Actions, happened yesterday. For me, it went by in a blur. A little like attending your own wedding, you’re so caught up in it that you can’t quite tell how you’d react to it if you weren’t. But maybe that feeling of being overwhelmed was partly due to the content. […]

The purpose of our first Extremes Workshop, May 6

by | May 4, 2015 | 1 Comment
Category: Uncategorized

This coming Wednesday, May 6, we will have our first science workshop for the Extremes Initiative. We’re calling it Extreme Weather and Climate: Hazards, Impacts, Actions, and it will be an intense day of science talks. We’ve left time in the program for discussion as well. So although the crowd looks like it will be […]

Clouds, circulation and climate sensitivity

by | April 8, 2015

I’m a co-author on a paper that appeared last week in Nature Geoscience entitled “Clouds, Circulation and Climate Sensitivity”. This paper describes a “Grand Challenge”, one of several activities with that label, all begun in the last couple of years under the World Climate Research Programme (WCRP). For about another three weeks, the paper is freely […]