Tsunami link to climate change remains questionable

08/12/2009 14:02

By Cherelle Jackson

COPENHAGEN - The recent tsunami which devastated three Pacific island countries, and caused great fear and panic is possibly linked to climate change according to some international scientists, others however others remain skeptical about relating the two.
The World Meteorological Organisation (WMO) of the United Nations says there is no link between seismic activities and weather patterns.
Secretary General of WMO Michel Jarraud told Environment Weekly today that although the frequencies of earthquakes and tsunamis are notable, the link is not defined.
"There is no scientific link between the two, as far as we know, there is no significant link between earthquakes and climate change."
Jarraud says that there are aspects of climate change that could affect tsunamis in the region.
"What happens though is that with sea level rise as a result of climate change, the impact of tsunami will be bigger, because the sea level is higher so the tsunami
will penetrate deeper over land."
Director of Germanwatch, a climate and development organisation says that the link can be considered.
Christopher Bals said today: "I think there are no scientifically based indications that the tsunamis or earthquakes so far are connected to climate change. There is
an emerging debate about this, but so far there is no evidence that this is really happening."
Although very little research is published on the link between earthquakes and climate change, some scientists are convinced that it is all interrelated.
Greenland and Antarctica ice sheets and glaciers are melting as well as sliding and according to Robert Correll, the Chairman of the Arctic Climate Impact Assessment
there is more to come.
He says that Greenland has seen a massive acceleration of the speed at which glaciers are sliding into the ocean, and each slide can cause an “ice” quake occurring
several times a year.
Celsias, a publication on climate change trends note the trend is causing changes, including currents from the Pacific and Atlantic oceans feeding into the Arctic
Circle and warming the waters even more. 
A link between climate change and shifts in the crust is not a new concept according to Celsias. 
Bill McGuire of University College London says: “The whole earth is an interactive system.  You don't need huge changes to trigger responses from the crust.”
McGuire and other scientists studied the history of climate changes associated with the end of the last ice age and the retreat of glaciers, approximately 18,000 years
McGuire explained that when ice melts, the earth's crust “bounces” up again, triggering earthquakes that then set off landslides and tsunamis.
In a published Guardian report McGuire wrote that the enormous mass of water pouring into ocean basins from retreating ice sheets adds water to the continental islands
and marine island chains, such as Sumatra and Samoa, where more than 60 percent of the world's active volcanoes are located, is enough to overload and bend the underlying crust. 
Bals of Germanwatch says that there is merit to the argument.
"There is a merit to enormous weight in Himalayas and other regions, this can affect earthquakes, but so far the scientific knowledge about this is not so hard that
you really can say yes, there is a debate but it is not proven."