COP28 Climate Summit: Pledges & Realities

Climate Change & COP28 (start time: 1:30) A major global climate conference is taking place now in Dubai, amidst a year of record-breaking heat, wildfires, floods and more around the world.  COP28 is short for the 28th Conference of the Parties of the United Nations Framework Convention on Climate Change. The aim of the conference is to have nations address climate change by pledging to cut greenhouse gas emissions (and actually following through), investing more in clean energy, and having richer nations help fund climate-adaptation measures in developing countries and especially vulnerable communities. Our guests today are Dr. Alice Alpert, a senior scientist at Environmental Defense Fund who previously served on the U.S. delegation to some COP conferences; and science journalist Tom Yulsman, who directs the Center for Environmental Journalism at CU Boulder.

Hosts: Susan Moran, Joel Parker
Producer & Executive Producer: Susan Moran
Engineer: Joel Parker

Listen to the show here:


Coral Climate Clues // Tropical Carbon Sink

On today’s show we offer three feature interviews, including a short opening interview.

Credit: Russell Kane, Creative Commons

Alcohol and weight gain (starts at 3:34): Science journalist Jill Adams shares the latest science on the connection between alcohol and weight gain. The science is murky, as she states in her recent column in the Washington Post.


Scientists drilling a coral sample from Jarvis Island. Photo credit: Julia Cole
Scientists drilling a coral sample from Jarvis Island. Photo credit: Julia Cole

Climate Clues in Coral (starts at 9:02): Despite certain appearances and rumors to the contrary, global warming has not been on holiday for the past decade. But increases in temperature at the Earth’s surface have slowed down, prompting scientists to work hard to figure out why. It seems that a lot of heat that has been building up in our planet’s climate system due to greenhouse gas emissions has winded up deep in the Pacific Ocean. Why? Diane Thompson, a post-doctoral scientist at NCAR and lead author on a new study, discusses with HOE’s Tom Yulsman how a sample of coral from a remote atoll in the tropical Pacific revealed some important answers.

Tropical forest in the Serra do Mar Paranaense in Brazil. Photo credit: Deyvid Setti e Eloy Olindo Setti via Wikimedia Commons
Tropical forest in the Serra do Mar Paranaense in Brazil. Photo credit: Deyvid Setti e Eloy Olindo Setti via Wikimedia Commons

Tropic forests love CO2 (starts at 16:04) It’s been known for some time that tropical forests are not only rich in biodiversity, but they also absorb a lot of carbon dioxide that humans spew into the atmosphere.  But just how much greenhouse gases—namely CO2–these forests take up, say, compared with temperate and boreal forests, has been eluding researchers.  Britton Stephens, an atmospheric scientist at NCAR, discusses with HOE’s Susan Moran a new study he co-authored. It suggests that tropical forests may be absorbing far more CO2 than many scientists had previously thought.

Hosts: Susan Moran, Tom Yulsman
Producer: Susan Moran
Engineer: Shelley Schlender
Executive Producer: Kendra Krueger


CO2 from the Amazon // US Smokestacks

amazonAmazon CO2 (start time 04:37) The Amazon basin contains the largest tropical rainforest on the planet. It’s been critical not only for its beauty and biodiversity but also for its ability to store more carbon dioxide than it emits. The soil and above-ground biomass of the Amazon makes it one of the largest reservoirs of carbon dioxide. And that has helped to keep climate change from accelerating even faster. But a new study shows that the Amazon’s tropical ecosystems may actually give off more CO2 into the atmosphere than they absorb. To learn what’s shifting in the Amazon basin and the implications of this shift, host Susan Moran speaks with one of the authors of the study. John Miller is a scientist with the National Oceanic and Atmospheric Administration in Boulder. Specifically, he’s with NOAA’s Cooperative Institute for Research in Environmental Sciences, which is at the University of Colorado.

cires-joost-in-lab_500Power Plant Smokestacks (start time 14:43) To understand the global greenhouse gas budgets, it’s critical to characterize their sources and sinks. Electrical power generation accounts for about a third of all greenhouse gas emissions in the US. While the actual generation of power is only part of the entire production and use cycle of electricity, power generation stations are an important part of the budget. A definitive study of smokestack gases shows that power plant emissions in the US are down and that combined-cycle gas powered plants have much lower emissions than the coal plants they are replacing. How On Earth host Jim Pullen talks with the study’s lead author, Dr. Joost de Gouw. Joost is also with the Cooperative Institute for Research in Environmental Sciences at the University of Colorado in Boulder and also NOAA’s Earth System Research Laboratory (ESRL), Chemical Science Division.

Hosts: Jim Pullen, Susan Moran
Producer: Jim Pullen
Engineer: Jim Pullen
Executive Producer: Jim Pullen
Additional contributions: Joel Parker and Kendra Krueger

Listen to the show here:



Noise Pollution

Population impacted by aircraft noise greater than 55 dB day–night noise level in 2005 (from “Development of an income-based hedonic monetization model for the assessment of aviation-related noise impacts” by Q. He, MIT Master’s thesis) [click on image to see large version]
Noise Pollution (starts at 6:15) –  How on Earth’s Shelley Schlender talks with research scientist Larry Finegold about noise pollution and about a workshop being held today in Denver about Noise Management in Communities and Natural Areas.  Dr. Finegold has authored or contributed to over 80 publications on noise including the US National Academy of Engineering report, “Technology for a Quieter America,” the World Health Organization report, “Burden of Disease from Environmental Noise,” and the article “Community Annoyance and Sleep Disturbance: Updated Criteria for Assessing the Impacts of General Transportation Noise on People.”

Host / Producer / Engineer: Joel Parker
Additional Contributions: Susan Moran
Executive Producer: Susan Moran

Listen to the show: