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Climate Change is Turning up the Heat on July 4th in our National Parks

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New research shows that more extreme climate conditions due to global warming are already affecting more than 250 national parks, including the Mojave National Preserve, Lake Mead National Recreation Area, the Chesapeake and Ohio Canal National Historical Park and Mammoth Cave National Park. Recent temperatures at Grand Canyon National Park have been at the extreme end of historical averages.

Coming on the heels of the Union of Concerned Scientists’ own recent report on climate impacts at some of the United States most iconic historic sites, a new study has shown that most U.S. National Parks are now experiencing warmer temperatures than at any time since the National Park Service was founded in 1916.

Climate changes in hundreds of national parks will require new approaches to resource management

National Park Service Scientists William Monahan and Nicholas Fisichelli analyzed the climate of the last 10-30 years for 289 national park units and compared it to the “historical range of variability” for the period 1901-2012. They found that “parks are overwhelmingly at the extreme warm end of historical temperature distributions.” 91% of the parks are warmer than they were, and this general pattern can be seen from the Pacific Islands to Alaska, to the U.S. East Coast.

Temperatures at the Grand Canyon are the high end of historic extremes. Photo: NPS

Temperatures at the Grand Canyon are the high end of historic extremes. Photo: NPS

Published in the journal, PLOS ONE, the new research will likely have far-reaching consequences for how protected areas managers think about resource conservation and management in the future. Management strategies that have worked historically may no longer be effective in a rapidly changing climate.

For example, the authors make the case that because of sea level rise, managers at Point Reyes National Seashore in California may now need to include strategies to allow the shoreline and wetlands to migrate inland, rather than try to maintain historic conditions and protect and against sea level rise. Similar management choices will need to be made in many other parks. However, while the vast majority of the parks are getting warmer, there has been much more variability in precipitation trends, as would be expected based on observed trends and climate modeling projections. But the study authors identified some clear regional patterns. For example, parks in Hawaii and the desert southwest have become warmer and drier, whilst parks in the Northeast are now warmer and wetter.

Extreme climate conditions present a massive challenge in preserving park resources

Appomattox Court House National Historic Park in Virginia is one of the national parks that has witnessed a major warming trend. Photo: Jasperado

Appomattox Court House National Historic Park in Virginia is one of the national parks that has witnessed a major warming trend. Photo: Jasperado

For resource management in parks it is important not only to understand long-term annual trends but also variability in inter-annual climate conditions. For example, while both Appomattox Court House National Historic Park in Virginia and Niobrara National Scenic River in Nebraska are in the extreme high temperature range compared to historical climate, the Appomattox site exhibits high variability in temperature between years, while Niobrara is in the low range for annual variability.

Seasonal variation can be important too. For example, the authors found that Assateague Island National Seashore (which is already under threat from sea level rise) in addition to experiencing extreme warm conditions in recent decades compared to its historic climate, has also suffered extreme wet conditions in the wettest quarter of the year and extreme dry conditions in the normally driest quarter of the year. Apostle Islands National Lakeshore in Wisconsin has already reached the hottest summer temperatures it has experienced in the last 100 years, and so any further warming will push it into new conditions which managers have never had to deal with since the creation of the park.

Joshua Tree National Park is one of many where scientists are detecting changes in climate and ecosystems. NPS photo by Robb Hannawacker

Joshua Tree National Park is one of many where scientists are detecting changes in climate and ecosystems. NPS photo by Robb Hannawacker

In response to the new study, National Park Service Director, Jon Jarvis, was quoted as saying “This report shows that climate change continues to be the most far-reaching and consequential challenge ever faced by our national parks.” To rise to this daunting challenge we must continue to fund cutting edge research to understand the impacts of climate change in our parks and protected areas, as well as urgently stepping up national efforts to reduce carbon pollution and prepare for the consequences of climate change.

Posted in: Global Warming, Uncategorized Tags: , , , , , , , , ,

About the author: Adam Markham directs the Union of Concerned Scientists’ special initiative on climate impacts. See Adam's full bio.

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  • Cartoonmick

    I really do think it’s almost too late. Too many systems have lost their
    controlling feedback and are creeping into “runaway” mode.

    And it’s all driven by greed and weak politicians who won’t listen to climate scientists.

    Greed is the motivating factor for the big-biz polluters.

    They quietly gather more wealth whilst enjoying the political protection
    which allows big-biz polluters to keep polluting with their carbon gasses; the
    major cause of the Climate Change.

    Politicians are the only ones with the power and authority to force needed
    changes, but they seem reluctant for whatever reason to do so.

    They just keep ignoring climate scientists and demonizing them.

    Sorry, Kids. The majority of us didn’t mean for it to happen. We just
    couldn’t find the politicians with the guts to stand up to the greedy big-biz
    polluters. Please forgive us.

    Nothing to laugh about, but here’s a cartoon on the topic . . . .

    http://cartoonmick.wordpress.com/editorial-political/#jp-carousel-775

    Cheers
    Mick

    • Lolamarina

      True

    • Thom

      “but they seem reluctant for whatever reason to do so.”

      Enter the Koch brothers. These 2 idiots are the worst of the top 1%ers. They’ve poured BILLIONS into misinformation campaigns against anything that stands in their way of making profits. They’ve bought politicians at all levels of government (they even owned a school board for a term – and were pushing segregation there!)

      Organizations they started and/or fund (and others started by similar small-minded individuals & corporations) have spewed out all this anti-climate change propaganda into the media with just one purpose: create a debate. So long as there is debate, there will be no change. It’s absurd because the debate on IF climate change is related to humans output of CO2 has been over for a LONG time, but by pouring money into the propaganda machine, they’ve kept it going in America. The only debate that has continued is how bad it is, and recently there’s been a lot of consensus: BAD. Worse than anyone had previously thought.

      This is not just politicians fault – it is our fault. We have way more power than we realize, and need to stop blindly listening to anything we hear on TV. Spend some time researching this on the internet and you’ll see the rest of the world (and all the REAL American scientists) are terrified.

      We’re either going to make drastic changes to our lifestyles to fix this, or mother nature is going to make them for us. Like Mick, I fear she’s already well on her way.

  • mememine

    We ARE Doomed then;
    The needed “Climate Action” to “save the planet” is impossible now as long as only you remaining “believers” are 100% certain that the end is near while all of science is only 95% certain after 32 years of them never “believing” it “will be” a crisis. Prove me wrong.
    Science can only end this debate, not a mob of you remaining and determined “believers” goose stepping our children to your exaggerated greenhouse gas ovens with such childish glee. History is watching you witch burners.
    Now who’s the neocon?

    • hamer-w

      The “debate” is over.science trumps belief.97% of scientist claim climate change/global warming is real.If 3 Dr’s tell you that you don’t have cancer and 97 Drs tell you that you do have cancer-who are you going to believe?

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