It is a phenomenon in which the sea level rises, such as the melting of continental ice sheets and thermal expansion of seawater triggered
by global warming. Mean sea level, in other words I refers to the rise of water surface obtained by averaging ring the short-period variations,
such as ocean waves, tsunamis and storm surges.
☆ Why sea levels to rise?
Due to the impact of global warming, sea level rise of the pace of the dozens of times is observed, and it is a concern shall be further
accelerated in recent years.
It is the thermal expansion of sea water, then the main cause of sea-level rise is the melting of the Greenland ice sheet and
the Antarctic ice sheet.
Direct relevance to the currently warming is not supposed, but in recent years, with the rise of groundwater, an increase in the buoyancy of
the underground station becomes a problem, anchor bolt installation work is performed in Ueno Station and Tokyo Station .
Also be pumped by the regulatory industrial water, groundwater level is recovering has affected major cause of groundwater rise in Tokyo.
Some of the areas above sea level Oceania countries and countries, such as the Maldives-laden area below sea level Netherlands,
northern Germany, Denmark, Bangladesh, and Vietnam is home to low island, even where it has become a problem
of sea level rise is imminent there.
Trek is being planned already in Tuvalu, the occurrence of immigration by sea level rise, such as this is expected in the future.
In the old days, there was peace and Jomon transgression transgression.
In particular, a small island nation above sea level cities such as Venice is low, such as Oceania,
the influence of sea-level rise has become a serious problem.
☆ how to improve!
As a countermeasure, there is a withdrawal of protection from coastal areas, with adaptation to sea level rise,
but in Japan less plains, have to choose the protection and adaptation to sea level rise mountains a lot.
Therefore, the design and implementation of a comprehensive plan transportation, distribution, fishing, recreation,
disaster prevention, land conservation, such as nature conservation is required.
The estimates by the Department of Transportation Port Authority, if it is assumed that a sea level rise 1m,
7 trillion \ 900 billion cost of the reinforcement, seems to 11 trillion 500 billion Security Fee of levees and bank protection of
the coast and the raising of the port facility.
Efforts to prevent global warming due to carbon dioxide emissions, are being promoted in various fields industry,
transportation, consumer, but is also the situation region to fear serious problems occur due to sea level rise is
increasing, and sea level rise appropriate measures and enhanced monitoring system is needed in the future.
In addition, it is believed investigate further the cause and mechanism-based meteorology, and oceanography, efforts
Improvements for the duration of energy resources and the prevention of global warming will become increasingly important.
☆ experiment of sea level rise!
★ experimental tool
Bottom flask, an incubator, red food coloring, glass tube, rubber stopper
★ How
① A hole with a width glass tube passes through the rubber stopper, and passed through the glass tube.
② I put red food coloring and water to the flask.
③ I fitted a rubber stopper through the glass tube to the flask.
④ I hot water to a 30-degree water in an incubator.
⑤ To observe the situation and put the flask in hot water of 30 degrees.
★ result
Volume increases by water in the flask expands, water rose.
