California Coastal Commission launches presentation series on sea level rise

Quasi-judicial agency hopes to ramp up informational briefings to address what was described as a “crisis.”

EUREKA—California Coastal Commission Executive Director John Ainsworth identified sea level rise as a “slow-moving disaster” during the quasi-judicial agency’s November 2018 meeting. He added rising ocean waters is a “real problem,” an issue private and public entities alike had to begin addressing as soon as possible in order to minimize the effects of sea level rise (and other related climate change events).

Ainsworth expressed an urgency to address the future effects of sea level rise nine months later, this time informing commissioners and the public of a series of briefings and presentations the Coastal Commission will be making in an attempt to plan for one of the most discussed and analyzed climate change events.

Sea level rise, if any number of projections are actually realized between now and 2100, would certainly affect Southern California’s many harbors and marinas.

“This will be the first in a series of informational briefings that we are planning in order to highlight and break down the different aspects of sea level rise science and adaptive planning management strategies and policy approaches to deal with sea level rise,” Ainsworth said, addressing the first part of the briefing series.

Humboldt Bay – which is home to Northern California cities such as Arcata, Blue Lake and Eureka – was the focus of the first briefing, which was on Aug. 9.

The planned discussions would also, according to Ainsworth, identify “significant challenges we and local governments are facing and planning for sea level rise and climate change.”

Ainsworth added the informational briefings would actually allow the commission to have the most expansive discussion possible on sea level rise, as commissioners and staff members wouldn’t be limited to the four corners of a paper when considering a specific agenda item, such as a permit consideration or public hearing.

Kelsey Ducklow, an environmental scientist with the Coastal Commission, said several of California’s local jurisdictions are studying the way climate change and sea level rise could affect vulnerable communities who work, live or recreate near or along the state’s coast.

Much of the Aug. 9 presentation focused on sea level rise policy and adaption in the Humboldt Bay area. Some of the data presented painted a grim picture of what could go wrong if the region does not act now, according to Coastal Commission staff and commissioners.

“Human nature is not necessarily rational, certainly when it comes to these kinds of difficult, complicated, almost overwhelming situations,” Commissioner Donne Brownsey said. “If ever there was a place in the state of California where these issues must be addressed full-on and with all deliberate speed, it’s Humboldt Bay and the surrounding cities.”

Aldaron Laird, an environmental planner with Trinity and Associates, spoke to the commission about what’s happening with respect to sea level rise along California’s northwestern coast.

The Humboldt Bay coastline, according to Laird, lost 90 percent of its salt marsh and is now almost entirely open water or mudflat. About 75 percent of Humboldt Bay’s 102 miles of coastline is occupied by artificial structures (as of 2017). Dikes make up 41 miles of the artificial shoreline structures; railroads account for 11 miles of artificial shoreline structures, Laird added.

“We have had breaches on Humboldt Bay,” Laird told commissioners. “When the dikes breach, hundreds of acres are flooded with saltwater on a daily basis. This is on private property.”

The Coastal Commission unanimously adopted a sea level rise policy guidance document in 2015. The guidance document provides recommendations for sea level rise policy implementation. Its chapters focus on sea level rise science, the permitting process, consequences of rising waters and adaptation strategies. A vulnerability assessment, complete with 10-year projections of possible sea level rise, is also included in the guidance document.

Commission staff might consider creating regional authorities to efficiently address sea level rise policymaking.

“This is no longer a slow-moving emergency, this is ground-zero for sea level rise,” Ainsworth said. “We need something like a Marshall Plan to deal with this crisis. It’s such a complex web of issues.”

Commissioner Mike Wilson suggested Hollywood’s studios should consider producing a disaster film with sea level rise as the central plot.

The Log, of course, receives comments from readers questioning whether sea level rise is actually a disaster on the verge of occurring.

A reader who identified himself as “Richard” wrote the following comment on an article on about a NOAA report on high-tide flooding days: “Climate alarmists! Tides rise and fall. Their projections are meaningless because they are based on inaccurate models. Worry not!”

The same Richard also called climate change a “hoax” on another article posted on The Log’s website, this one reporting on a Swedish teenager who decided to protest the widely discussed, reported and studied environmental event by sailing across the Atlantic Ocean

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One thought on “California Coastal Commission launches presentation series on sea level rise

  • Leroy Achoy

    The Eel River is what created Humbolt Bay it is now deverted to exit to the south not thru Humboldt Bay.
    By not replenishing the silt that forms the basis for the wet lands you wind up with mud falls and open water.
    Ocean levels rising?
    Not a new thing that is why there are sharks in Bakersfield.
    Remember this one: U.N. Predicts Disaster if Global Warming Not Checked June 30, 1989Lesson for today:
    1. The sun is 1,300,000 times as big as the earth.
    2. The sun is a giant nuclear furnace that controls the climates of all its planets.
    3. The earth is one of the sun’s planets.
    4. The earth is a speck in comparison to the size of the sun.
    5. Inhabitants of the earth are less than specks.
    Study Question: How do less-than-specks in congress plan to control the sun?



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