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

NDP leader Jagmeet Singh visits with Langford high school students

Students asked him questions about current political issues

New report finds B.C. victims of opioids crisis on lower of end of socio-economic spectrum

UVic scholar calls for decriminalization of drugs responsible for opioid crisis

Alleged child abduction attempt in Langford a family issue, RCMP say

Const. Matt Baker with West Shore RCMP says parents should not worry

City of Victoria to see 588 affordable housing units

Provincial funding is aiming to see 4,900 new mixed-income rental properties across B.C.

Victoria Curling Club, arena parking lot considered for new Crystal Pool location

Considering other vendors could cost Victoria first year of provincial and federal funding

VIDEO: Amazon to split second HQ between New York, Virginia

Official decision expected later Tuesday to end competition between North American cities to win bid and its promise of 50,000 jobs

Kuhnhackl scores 2 odd goals as Isles dump Canucks 5-2

Vancouver drops second game in two nights

Student arrested at Vancouver Island elementary school

Pupils never in danger, incident unrelated to the school

POLL: Have BC Ferry waits ever forced you to cancel your travel plans?

Many BC Ferry passengers heading out from Swartz Bay to Tsawwassen on… Continue reading

Stink at B.C. school prompts complaints of headaches, nausea

Smell at Abbotsford school comes from unauthorized composting operation

Fear of constitutional crisis escalates in U.S.; Canadians can relate

Some say President Donald Trump is leading the U.S. towards a crisis

Racist slur cleaned off memorial at Qualicum First Nation graveyard

Site was hit by vandals on Friday; many immediately offered support and assistance

B.C.-based pot producer Tilray reports revenue surge, net loss

Company remains excited about ‘robust’ cannabis industry

Canada stands pat on Saudi arms sales, even after hearing Khashoggi tape

Khashoggi’s death at Saudi Arabia’s consulate in Istanbul further strained Riyadh’s already difficult relationship with Ottawa

Most Read