Global warming ‘slowed by pollution’

Climate scientist Andrew Weaver says variations from climate predictions relate to the rise of Asia and its higher air pollution rates

Oak Bay-Gordon Head MLA Andrew Weaver

The apparent slowing of global warming in recent years is likely due to effects of increased particulate and other conventional pollution, particularly from thermal coal use in Asia, says B.C. MLA and climate scientist Andrew Weaver.

Weaver was asked to respond to a report issued Thursday by University of Guelph environmental economist Ross McKitrick, a long-time critic of climate change models and a senior fellow at the Fraser Institute. Reviewing temperature data used by the Intergovernmental Panel on Climate Change, McKitrick notes that data for the last two decades have shown less warming than was predicted by most climate models.

McKitrick does not challenge the conclusion that human-generated carbon dioxide traps heat in the atmosphere. But he argues that the uncertain effect of rising emissions should cause policy-makers to wait for clarity before “making any irreversible climate policy commitments, in order to avoid making costly decisions that are revealed a short time later to have been unnecessary.”

Weaver questioned the accuracy of McKitrick’s report.

“To say that there’s no statistically significant change over the last 15 to 20 years, it’s just not true,” Weaver said. “2005 is the second warmest year on record, 2010 is the warmest, and we’re going to break the record in 2014 and set a new record.”

Weaver said climate models in the late 1990s estimated an amount of particulate and aerosol pollution in the world’s atmosphere that has been exceeded by growing thermal coal use in China and other emerging economies. That pollution has a cooling effect, and when air pollution is cleaned up it as it has been in North America, warming increases, he said.

“It doesn’t say anything about models or international policy,” Weaver said. “One thing we know is that China is going to clean up its air quality, because they have to.”

The issue is significant to B.C., where a carbon tax on fuels remains in place. Northeastern B.C.’s booming shale gas production, a cornerstone of the provincial government’s economic strategy, contains more CO2 than conventional gas, and it is extracted and vented to the atmosphere in processing for fuel or export.

Just Posted

Skiers in the groove at Apex

Competitors in full swing at Canadian Selections this weekend.

Penticton Subway making it fresh for Soupateria

Subway shops are donating 600 inches of subs, 100 cookies and drinks to Soupateria Dec. 20

What’s shaking at the museum

Kids got to learn about earthquakes Saturday at the museum.

All aboard the Summerland Christmas Express

The first train of the Summerland Christmas Express schedule.

Vees drop heartbreaker in West Kelowna, host Teddy Bear Toss Saturday

Penticton loses overtime game to West Kelowna Warriors

All aboard the Summerland Christmas Express

The first train of the Summerland Christmas Express schedule.

Kamloops RCMP warning public to stay away from unfolding domestic dispute

The public is being asked to avoid Sabiston Creek Road off of the highway

Owl found dead after eating rat poison leaves B.C. woman concerned

After finding the owl on her Surrey property, Christine Trozzo says the poison is a concern for kids

Change to CPP death benefit panned as insufficient to cover funeral costs

Funeral Services Association of Canada lobbied governments to raise the value to $3,580

#MeToo at work: Employers play a role in fixing culture of sexual harassment

B.C. workplaces are getting ahead of being the next MeToo debacle, calling on experts to train staff

Column: Make it a green Christmas

Instead of purchasing a cuddly stuffie this year, put your money towards helping the real thing.

B.C. woman brain injured in crash as a baby gets $1.1 million in damages

Trial heard the woman was 16 months old, being carried by her mother when they were both hit

Interior Health holding immunization clinic in Vernon Saturday

IH issues list of Okanagan meningococcal immunization clinics

Court denies WestJet’s bid to toss out discrimination lawsuit of former worker

Mandalena Lewis is suing WestJet over allegations of gender-based discrimination

Most Read