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

Special Public Avalanche Warning for Most Mountainous Regions of BC

Avalanche Canada is issuing a Special Public Avalanche Warning for recreational backcountry… Continue reading

Revelstoke developer frustrated with permit delays

Phase 2-3 of Mackenzie Village has been with city staff for 18 months

Glimpses of Revelstoke’s past

125 Years Ago: Kootenay Star, December 16, 1893 There were about 200… Continue reading

Avalanche control scheduled today on Highway 1 east and west of Revelstoke

Avalanche control work is scheduled today for two different locations along Highway… Continue reading

Revy let’s talk: Christmas cheer, or not

It’s Christmas time in Revelstoke. It’s a time of celebration, lights are… Continue reading

Omar Khadr wants changes to bail conditions

‘My life is held in suspension’, says the former Guantanamo Bay detainee

Sissons scores OT winner as Predators beat Canucks 4-3

VIDEO: Vancouver battles back to earn single point in Nashville

Lions announce seven members of coaching staff not coming back for 2019

The operational moves come two days after the Lions announced DeVone Claybrooks as the team’s new head coach

Missing man last seen in Shuswap

Red Deer RCMP would like public’s help locating elderly man with dementia last observed in Sicamous

$12K awarded to atheist family who oppose Christmas, Hanukkah in B.C. classroom

Gary Mangel,May Yasue said holidays, Remembrance Day and Valentine’s Day not appropriate in preschool

Aboriginal poet faces backlash for calling out NHL-themed totem poles

Rebecca Thomas says she received backlash for asking a drugstore chain to remove NHL merchandise

No plans yet for free WiFi on BC Transit buses

BC Transit says they are monitoring the roll-out of free WiFi on Translink vehicles

Some Kotex tampons recalled in Canada and U.S.

In some cases, tampon users sought medical attention “to remove tampon pieces left in the body.”

Sex-assault squad investigated eight incidents at Toronto all-boys’ school

The interim president of a Roman Catholic all-boys school rocked by student-on-student abuse allegations said the football program was cancelled for next year.

Most Read