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An ocean researcher at the university of california
Sanddiago says
Waves have been getting bigger and stronger
Since nineteen seventy there are also more big wave events than ever before a big wave is about four meters tall or more
Peter premier ski at the university's scripts institution of oceanography looked at seismic records going back to nineteen thirty one in his research
Seismic information is often used to measure the power of earthquakes
But broommersky said
Large waves create enough energy to be measured by seismographs
Also when large waves reach the shore
They bounce back and run into new waves
The crash sends energy through the ocean floor
Where it can be measured by seismographs
Those measurements permitted bromerkey to judge the strength and size of waves over a period of ninety years
Promersky said
He stumbled upon the seismographic information before the discovery
He said it was almost impossible to compare waves from the past with those from the present
It took a lot of work to put the data together
Much of the information was on paper
Burmersky and his team of student researchers had to put the information into a computer
So they could examine the data
The slow process took years
They found that the height of most waves in the winter along the california coast have grown by about thirty centimetres
Since nineteen seventy starting that year waves of over four meters happened more often as well between nineteen
Ninety six and twenty sixteen
The large waves happened twice as often as they did from nineteen forty nine
Two
Nineteen sixty nine
Broommersky and his team published their research recently in the journal of geophysical research oceans
Nineteen seventy is the year scientists believe the warming of the planet began to speed up
Burmers sky says
The new data shows that climate change is making ocean waves
Taller and stronger
That means they are more likely to damage the coast roads and structures
Such as piers and housses
Permmerkey said
His research may be a warning
That bigger and stronger waves are ahead with more warming
Sea levels will rise
And waves will get stronger
Causing
Flooding and more damage to land
The california coast has already been damaged by big waves in recent years
Gary grigs is an ocean researcher at the university of california santa crews
He did not work on the study
He said
A thirty centimeter increase in wave height over fifty years is not that large
However the findings of the study support what scientists already know waves are becoming stronger and causing more damage along costs
He said
Burmersy's project adds to the data showing the world is warming fast and sea levels are rising
The challenge
He said
Is sort of how to really respond to that