We talk about all sorts of cases of
marine heat waves in the interview.
The researchers predict even more frequent
marine heat waves in coming decades.
Not exact matches
This sounds ideal now that the SoCal
heat wave has settled down and the
marine layer fools us into thinking that there's really a fall chill
in the air.
For instance, a 2016
marine heat wave killed 30 percent of coral
in the Great Barrier Reef, a study published online April 18
in Nature reports.
In December, a special edition of the Bulletin of the American Meteorological Society included a selection of studies investigating the influence of climate change on a variety of recent extreme weather and climate events, including
marine heat waves.
That means
marine heat waves may become an even bigger problem
in the coming decades.
One paper found that a 2016
marine heat wave off the coast of Alaska was unprecedented
in terms of the temperatures it reached and concluded that it would not have been possible
in a world where human - caused climate change was not occurring.
A study published yesterday
in Nature Communications suggests that there's been a 54 percent increase
in the number of annual «
marine heatwave days» since the 1920s — that is, the total number of days each year that a
marine heat wave is occurring somewhere around the world.
The scientists, led by Eric Oliver of Dalhousie University
in Canada, investigated long - term
heat wave trends using a combination of satellite data collected since the 1980s and direct ocean temperature measurements collected throughout the 21st century to construct a nearly 100 - year record of
marine heat wave frequency and duration around the world.
Regional studies suggest that
marine heat waves may provoke «widespread loss of habitat - forming species such as kelps and corals, drive shifts
in species distributions, alter the structure of communities and ecosystems, and have economic impacts on aquaculture and seafood industries through declines
in important fishery species,» they note.
In extreme cases,
marine heat waves kill corals directly by essentially roasting them alive.
While the
marine heat wave particularly damaged staghorn corals (Acropora millepora), this species may ultimately prove to be one of the resilient ones, Mikhail Matz, a biologist at the University of Texas at Austin, and his colleagues report
in PLOS Genetics.
SWELTERING STRANDS
In 2011, a
marine heat wave off Australia's southern coast devastated the towering kelp forests of the Great Southern Reef (shown).
«The paper lays out
in gory detail how much damage a single
marine heat wave can [wreak] on key ecosystems.»
Note also that under hot conditions a stream of water vapor may not form clouds, but will instead act as an infrared blanket that amplifies the
heat wave (this kind of
heat wave is seen
in California, fed by
marine moisture from Baja).
In 2011 a
marine heat wave around normally cool waters of the Australian island of Tasmania changed the ecosystem apparently permanently.
In the early 20th century, the average
marine heat wave was about 10 days long (a global average).
Then Mark Eakin, the coordinator of NOAA's Coral Reef Watch reports the latest science: up to half of the Great Barrier Reef of Australia has died
in the longest
marine heat wave ever seen.
And so we can expect these trends [
in sea surface temperature increases and
marine heat waves] to continue, regardless of what we do, at least for the near future.»
Those
marine heat waves are popping up more often,
in more places, and lasting much longer.
As I reported
in a previous show, the Tasman Sea just had a
marine heat wave.
I ask Eric if he thinks we will see unexpected ecological shifts
in the future as
marine heat waves get worse.
Breaking science: unreported
marine heat waves are striking more often and more violently
in the seas.