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Spain | Israel |
Undersea Gas Leaks Off Israel’s Coast Are Discovered by
University of Haifa Researchers
11/11/2012 - University of Haifa - Undersea gas leaks off Israel’s
coast are discovered by University of Haifa researchers
geophysics team from the Leon H. Charney School of Marine Sciences
at the University of Haifa has identified a series of active gas
springs on the Haifa Bay sea floor.
information enables us to research beneath the sea floor and map out
the entire system, from the gas sources to their penetration of the
sea waters,” said Dr. Uri Schattner, head of the Department of
The terms “gas” and “sea” for many will invoke associations of
reserves, business, and a lot of money. Whatever the association,
most of the efforts in Israel’s energy field are being directed at
gas buried deep under the Mediterranean seabed.
Now a new geophysical
study, the first of its kind in Israel, has uncovered a system of
active gas springs in the Haifa Bay seabed, at relatively shallow
depths, only a few dozen meters below the surface.
The study, published in the journal Continental Shelf Research,
describes the entire system, from its sources under the sea floor
through the natural springs emerging from the seabed.
“This is a natural
laboratory for researching gas emissions from the sea floor –
natural springs and less natural ones.
We are only beginning
to understand their contribution to climate and ecological change,”
said Dr. Uri Schattner of the Leon H. Charney School of Marine
Sciences at the University of Haifa, who led the research.
The first evidence of gas springs emerged from examining a map of
the sea floor off Israel’s northern coast.
A joint effort between
the University of Haifa and the Israel Oceanographic and
Limnological Research Institute revealed no less than 700 spots in
the seabed that looked like possible gas springs. The researchers’
suspicions intensified when seismic data identified pockets of gas
beneath the seabed.
Based on this evidence, researchers went out to sea four times to
collect more data from the seabed and from under the sea floor.
“Geophysical information enables us to research beneath the sea
floor and map out the entire system, from the gas sources to their
penetration of the sea waters,” said Dr. Schattner.
However, what they found exceeded all expectations. A gas deposit of
72 square kilometers was found on the continental shelf, at depths
of between 37 meters to 112 meters. While many of the gases remain
in the reserve, some still manage to escape into the sea.
“We don’t know yet
what kind of gas we’re talking about, but its role in undermining
the stability of the seabed is clear,” said Dr. Michael Lazar, a
member of the research team. “This means that any discussion of
marine infrastructure development must seriously relate to this
shallow gas stratum.”
Israel’s Energy and Water Ministry is expending a great deal of
effort on formulating National Master Plan 37H, which, among other
things, deals with the transportation of gas produced from deep-sea
drilling to pressure-reducing facilities. These will be located on
the continental shelf, in the sea, from where the gas will be
transported to the coast.
“Now we are beginning
to understand that there is no substitute for thoroughly researching
the stability of the sea floor to prevent an infrastructure failure,
since any leak could cause an ecological disaster,” said Dr.
During the coming months, the researchers will be making another
expedition to the springs, this time with a team of biologists and
geologists. This unique combination of experts from the Leon H.
Charney School of Marine Sciences will be able to provide a better
understanding of the type of gas involved and its influence on
marine life near the sea floor.
“Every research trip challenges and fascinates us anew,” said Dr.
Schattner. “This time we’ll be going out with a few vessels, each of
which is dedicated to different types of surveying and sampling.”