Wildfire Today

News and opinion about wildland fire

Wildfire Today

Tag: climate change

Will efforts to reduce carbon dioxide emissions affect forest management?

Author Bill GabbertPosted on Categories UncategorizedTags 8 Comments on Will efforts to reduce carbon dioxide emissions affect forest management?
Convection column Pioneer Fire
Convection column on the Pioneer Fire, August 30, 2016. Photo by Nick Guy of the University of Wyoming.

In case you came to our website yesterday and saw the green banner saying the site was closed for the day to recognize the global #ClimateStrike, we are back in service as you can see.

On Friday millions of people across the world, many of them young,  assembled to help bring awareness to what I and others are convinced is an emergency — a climate emergency. The more scientists learn about the changing climate the more serious the situation looks. A few years ago we were hearing that we had to reach net zero carbon dioxide (CO2) emissions by 2050. That is a long way off and many of us will not be around then. But the young people marching today will be stuck with the results of what we do between now and then.

We still need to reach net zero CO2 emissions by 2050, but we can’t wait until 2049 to begin making changes. Scientists are saying that to reach that goal, emissions would have to start dropping well before 2030 and be on a path to fall by about 45 percent by 2030. The longer we wait to begin making significant changes, the more difficult it will be to meet the 2050 goal.

Scientists estimate that wildland fires make up 5 to 10 percent of annual global CO2 emissions when taking into account renewed forest growth in the burned areas. Fires also release other greenhouse gasses such as methane. Experts estimate that the wildfires in California’s North Bay in October of 2017 emitted as much CO2 in one week as all of the state’s cars and trucks do in one year.

Up until now fire management in developed countries has virtually received a free pass when it comes to CO2, at least compared to what it could become in the next 10 to 15 years. There is world-wide pressure now to rapidly reduce the burning of fossil fuels. It is only a matter of time before we start hearing a chorus saying all vegetation fires are “bad”, including prescribed or “good fires”, using a term now being used by some U.S. Forest Service personnel.

Land managers should be thinking about how to deal with strong pressure to significantly reduce CO2 emissions from burning vegetation. Part of the answer is additional firefighters, engines, dozers, helicopters, and air tankers. The U.S. Forest Service budget for wildland fire has remained flat for the last several years, while the costs of suppression infrastructure has increased. In light of the climate emergency, allotting fewer real dollars to suppression is counter intuitive. Congress and the President need to take action on this budget issue.

Fuel treatment projects, including mechanical projects and prescribed fires, can reduce the size and resistance to control of wildfires. However, pressure to reduce CO2 emissions could make it more difficult to obtain approvals to conduct prescribed fires even though the results if done on a large enough scale can reduce emissions from wildfires over the long term. But it will be difficult to develop the formula for the right mix and priorities of mechanical treatments, prescribed fires, wildfire suppression, or doing nothing.

There are many irons in that fire, so to speak, such as dealing with smoke, protecting communities, restoring forests, conserving water resources, wildlife, endangered species, and of course the amount of CO2 and other greenhouse gasses coming out of our forests as they burn one way or the other. It remains to be seen if all of those goals can be satisfied as we move closer to the climate emergency tipping point. Some of them may have to be de-emphasized. Land managers might be accused of being selfish if they insist on attempting to accomplish all of these traditional objectives that may exacerbate the climate for the entire planet. As well meaning as de-emphasis might me, unless skillfully implemented using the best science, the unintended consequences could actually increase CO2 emissions over time.

Political candidate creates four-minute ad emphasizing the Camp Fire and climate change

Author Bill GabbertPosted on Categories UncategorizedTags ,
political ad wildfire fire
Screenshot from the video below.

Our policy on Wildfire Today about politics is that it “…will not be discussed, unless it directly affects wildland fire or firefighters”.

A presidential candidate, Bernie Sanders, has created a four minute video ad in which most of those minutes are spent on the topic of the devastating Camp Fire that killed 85 people and destroyed over 14,000 homes in Northern California in November, 2018. The ad also discusses climate change.

Senator Sanders may be using wildfire as a means to talk about climate change, but it is unusual for a political candidate to put this amount of effort into the subject of wildland fire.

Wildfire Today is not going to endorse politicians. If other candidates put forth a similar amount of effort on the subject of wildland fire, we will cover those as well.

Researchers evaluate connection between California wildfires and human-caused climate change

Author Bill GabbertPosted on Categories UncategorizedTags , , , 10 Comments on Researchers evaluate connection between California wildfires and human-caused climate change

A group of seven scientists published a paper last month that looks at the connection between California wildfires and human-caused climate change, titled Observed Impacts of Anthropogenic Climate Change on Wildfire in California. One of their main conclusions was that climate warming dries the atmosphere which in turn dries fuels, promoting forest fires in the summer.

Here is the abstract:

“Recent fire seasons have fueled intense speculation regarding the effect of anthropogenic climate change on wildfire in western North America and especially in California. During 1972–2018, California experienced a fivefold increase in annual burned area, mainly due to more than an eightfold increase in summer forest‐fire extent. Increased summer forest‐fire area very likely occurred due to increased atmospheric aridity caused by warming. Since the early 1970s, warm‐season days warmed by approximately 1.4 °C as part of a centennial warming trend, significantly increasing the atmospheric vapor pressure deficit (VPD). These trends are consistent with anthropogenic trends simulated by climate models. The response of summer forest‐fire area to VPD is exponential, meaning that warming has grown increasingly impactful.

“Robust interannual relationships between VPD and summer forest‐fire area strongly suggest that nearly all of the increase in summer forest‐fire area during 1972–2018 was driven by increased VPD. Climate change effects on summer wildfire were less evident in nonforested lands. In fall, wind events and delayed onset of winter precipitation are the dominant promoters of wildfire. While these variables did not change much over the past century, background warming and consequent fuel drying is increasingly enhancing the potential for large fall wildfires. Among the many processes important to California’s diverse fire regimes, warming‐driven fuel drying is the clearest link between anthropogenic climate change and increased California wildfire activity to date.”

An illustration from the paper:

Climate change California wildfires
Seasonal and annual burned areas in California for 1972–2018. (a) Total burned area in the four regions of focus: (b) North Coast, (c) Sierra Nevada, (d) Central Coast, and (e) South Coast. Annual burned area is decomposed into that which occurred in January–April (green), May–September (red), and October–December (orange). Significant (p < 0.05) trends are shown as bold black curves.

Below is an excerpt from the paper:

“In this study we evaluated the various possible links between anthropogenic climate change and observed changes in California wildfire activity across seasons, regions, and land cover types since the early 1970s. The clearest link between California wildfire and anthropogenic climate change thus far has been via warming‐driven increases in atmospheric aridity, which works to dry fuels and promote summer forest fire, particularly in the North Coast and Sierra Nevada regions. Warming has been far less influential on summer wildfire in nonforest areas. In fall, the drivers of wildfire are particularly complex, but warming does appear to enhance the probability of large fall wildfires such as those in 2017 and 2018, and this effect is likely to grow in the coming decades.

“Importantly, the effects of anthropogenic warming on California wildfire thus far have arisen from what may someday be viewed as a relatively small amount of warming. According to climate models, anthropogenic warming since the late 1800s has increased the atmospheric vapor‐pressure deficit by approximately 10%, and this increase is projected to double by the 2060s. Given the exponential response of California burned area to aridity, the influence of anthropogenic warming on wildfire activity over the next few decades will likely be larger than the observed influence thus far where fuel abundance is not limiting.”

Citation:
Observed Impacts of Anthropogenic Climate Change on Wildfire in California.
A. Park Williams John T. Abatzoglou Alexander Gershunov Janin Guzman‐Morales Daniel A. Bishop Jennifer K. Balch Dennis P. Lettenmaier
First published: 15 July 2019 https://doi.org/10.1029/2019EF001210

Former fire chiefs warn Australians about increasing climate threat

Author Bill GabbertPosted on Categories UncategorizedTags ,
Pilliga Fire New South Wales
Pilliga Fire 60km southwest of Narrabri, New South Wales, Australia, January 2018.

An article in The Guardian says 20 former fire chiefs in Australia are warning that the country and the emergency services are not prepared for the escalating threat from bushfires caused by climate change.

Below is an excerpt:

In a statement issued before a federal election date is announced, 23 former emergency services leaders and senior personnel have called on both major parties to recognise the need for “national firefighting assets”, including large aircraft, to deal with the scale of the threat.

The document calls on the next prime minister to meet former emergency service leaders “who will outline, unconstrained by their former employers, how climate change risks are rapidly escalating”.

The group also wants the next government to commit to an inquiry into whether Australia’s emergency services are adequately resourced to deal with increased risks from natural disasters caused by climate change.

Last year, in Australia alone, the NSW fire season began in early August, a heatwave led to fires in rainforest areas of Queensland in early December, and forest in Tasmania’s world heritage area caught fire in January, Australia’s hottest month on record.

Fires Queensland satellite photo
Satellite photo of smoke from the fires in Queensland, Australia, November 26, 2018.

Climate change brings less rain with more dry lightning and wildfires to Tasmania

Author Bill GabbertPosted on Categories UncategorizedTags , , ,
wildfires in Tasmania satellite photo
Satellite photo of smoke from wildfires in Tasmania, January 21, 2019. The red dots represent heat detected by the satellite. NASA & Wildfire Today.

Climate change has already brought alarming change to Tasmania, the huge island south of the Australian mainland. Until recently it was assumed that the climate differences would not be massive since it was thought by some that the ocean surrounding the island would not be heating as quickly as it was in other areas.

Now the southwest area of the state, the heart of its world heritage area, is being described as dying — the rainforest and heathlands are beginning to disappear. The nearby seas, it turns out, are warming at two to three times the global rate.

Richard Flanagan writes about this issue in an opinion article at The Guardian. Below is an excerpt:

…Then there was the startlingly new phenomenon of widespread dry lightning storms. Almost unknown in Tasmania until this century they had increased exponentially since 2000, leading to a greatly increased rate of fire in a rapidly drying south-west. Compounding all this, winds were also growing in duration, further drying the environment and fuelling the fires’ spread and ferocity.

Such a future would see these fires destroy Tasmania’s globally unique rainforests and mesmerizing alpine heathlands. Unlike mainland eucalyptus forest these ecosystems do not regenerate after fire: they would vanish forever. Tasmania’s world heritage area was our Great Barrier Reef, and, like the Great Barrier Reef, it seemed doomed by climate change.

Later [Prof Peter] Davies [an eminent water scientist] took me on a research trip into a remote part of the south-west to show me the deeply upsetting sight of an area that was once peatland and forest and was now, after repeated burning, wet gravel. The news was hard to comprehend – the enemies of Tasmania’s wild lands had always had local addresses: the Hydro Electricity Commission, Gunns, various tourism ventures. They could be named and they could be fought, and, in some cases, beaten.

Six weeks ago, the future that Davies and others had been predicting arrived in Tasmania. Lightning strikes ignited what would become known as the Gell River fire in the island’s south-west. In later weeks more lightning strikes led to more fires, every major one of which is still burning.

Climate assessment predicts increasing wildfires

Author Bill GabbertPosted on Categories UncategorizedTags 3 Comments on Climate assessment predicts increasing wildfires

By mid-century western wildfires could increase 200% to 600%

At 2 p.m. Friday on the day after Thanksgiving President Trump’s administration released an important document about our climate. Required every four years by a 1990 act of Congress, the Fourth National Climate Assessment focuses on the human welfare, societal, and environmental elements of climate change.

Surprising in its bluntness, it lays out the devastating effects on the economy, health, environment, and wildfires. Within the 1,656-page document wildfires are covered rather extensively and photos of fires are used several times in the headers of sections, like the one below for Chapter 1 (which may have been taken at the Howe Ridge Fire in Glacier National Park in Montana in August).

The scientists concluded that by the middle of this century, the annual area burned in the western United States could increase 2–6 times from the present, depending on the geographic area, ecosystem, and local climate. The area burned by lightning-ignited wildfires could increase 30 percent by 2060.

In the Southeast rising temperatures and increases in the duration and intensity of drought are expected to increase wildfire occurrence and also reduce the effectiveness of prescribed fire. Intra-annual droughts, like the one in 2016, are expected to become more frequent in the future. Thus, drought and greater fire activity are expected to continue to transform forest ecosystems in the region.

In the Southwest, recent wildfires have made California ecosystems and Southwest forests net carbon emitters (they are releasing more carbon to the atmosphere than they are storing). With continued greenhouse gas emissions, models project more wildfire across the area. Under higher emissions, fire frequency could increase 25%, and the frequency of very large fires (greater than 5,000 hectares) could triple.

The Northwest is likely to continue to warm during all seasons under all future scenarios, although the rate of warming depends on current and future emissions. The warming trend is projected to be accentuated in certain mountain areas in late winter and spring, further exacerbating snowpack loss and increasing the risk for insect infestations and wildfires. In central Idaho and eastern Oregon and Washington, vast mountain areas have already been transformed by mountain pine beetle infestations, wildfires, or both, but the western Cascades and coastal mountain ranges have less experience with these growing threats. Forests in the interior Northwest are changing rapidly because of increasing wildfire and insect and disease damage, attributed largely to a changing climate. These changes are expected to increase as temperatures increase and as summer droughts deepen.

Below are wildfire-related excerpts from the report.

Climate assessment overview

Chapter 1: Overview

The impacts of climate change and extreme weather on natural and built systems are often considered from the perspective of individual sectors: how does a changing climate impact water resources, the electric grid, or the food system? None of these sectors, however, exists in isolation. The natural, built, and social systems we rely on are all interconnected, and impacts and management choices within one sector may have cascading effects on the others.

Continue reading “Climate assessment predicts increasing wildfires”