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CU Boulder and NOAA scientists join panel discussion following Boulder screening of Ice on Fire, an HBO documentary

Human activity has changed the climate, and humans have not yet done enough to slow鈥攎uch less reverse鈥攖he damage, yet听four scientists who study climate change all agreed this week that they have reason for optimism.

The scientists, all of whom appear in the HBO documentary听,听joined a panel discussion after the Boulder screening of the film on the University of Colorado Boulder campus.

鈥淥n the pessimism scale, I鈥檓 an 8 or 9鈥� on a scale of one to 10, said James W.C. White, interim dean of the College of Arts and Sciences and a highly cited climatologist. On the optimism scale, however, he said he was a 9 or 10.听

鈥淭he generation of students that comes to this campus wants to change the world. I want to give them every opportunity to do that,鈥� White said.

Produced by Oscar-winner Leonardo DiCaprio, George DiCaprio and Mathew Schmid,听Ice on Fire听focuses on solutions designed to slow the accelerating environmental crisis. It argues that renewable energy is necessary but insufficient to meet the climate challenge.听

White鈥檚 acknowledgement of the grim scientific findings but expression of hope reflected the themes of听Ice on Fire,听which also features three other Boulder scientists who joined the panel discussion:听

• Jennifer Morse, climate technician at the Mountain Research Station of the CU Boulder (INSTAAR).
• Gabrielle Petron, research scientist at the CU Boulder (CIRES)/National Oceanic and Atmospheric Administration (NOAA).
• Pieter Tans, chief of the Carbon Cycle Greenhouse Gases Group at the Global Monitoring Division.听

Waleed Abdalati, who directs CIRES and moderated the panel discussion, asked the experts how they鈥檇 rank both their pessimism and optimism.

Tans said he was both pessimistic and optimistic, noting that the Paris Agreement on climate action hasn鈥檛 been effectively implemented. On the other hand, he said, people have the freedom to vote for government leaders who will take action.

Petron, too, expressed both pessimism and optimism, emphasizing the desire of younger people to address climate change. 鈥淓ven our generation, we want a world we can thrive in,鈥� she said.

Morse emphasized hope. 鈥淚鈥檓 super-optimistic about the next generation, but let鈥檚 not leave it all to them,鈥� she said.

Meanwhile, the rapid decreases in land and sea ice are grave causes for concern, the panelists said. 鈥淲hat鈥檚 concerning about an ice-free Arctic is a planet that has a very different weather pattern from where we live,鈥� White said. 鈥淭here鈥檚 a huge amount of carbon locked up in the Arctic.鈥�

Indigenous people see the change first hand, he added: 鈥淚f you are indigenous to the Arctic, you are terrified.鈥�

Ice on Fire听argues for a two-pronged approach to reversing the crisis: reducing carbon emissions through traditional renewable energy sources and new ones, like tidal energy, and implementing 鈥渄rawdown鈥� measures, focusing on methods for drawing down and sequestering carbon, including direct air capture, sea farms, urban farms, biochar, marine snow and bionic leaves.

The panelists also discussed how individuals can help in their everyday lives, even if they can鈥檛 afford to buy solar panels and don鈥檛 own their own homes (and thus can鈥檛 invest in energy-efficiency measures). Consuming less stuff and eating lower on the food chain were two suggestions.

After a spirited Q&A session with the audience, Abdalati asked the panelists to give the audience a one-sentence message to take home. Two responded with one word.

Morse: 鈥淭ogether.鈥�

Tans: 鈥淪olidarity.鈥�

Petron: 鈥淲e don鈥檛 have time; we need to act.鈥�

White: 鈥淪how your children and grandchildren that you really do love them.鈥�