The Sea Levels Are Rising

Definition of sea level rise: 1 Sea level: - Sea level, in particular level between average tide and low tide - Used as a criterion for arranging land elevation and ocean depth. 2 Sea level rise: - Why the average high tide level rises year by year: Today's sea level rise is due not only to thermal expansion but also to melting of glaciers and polar ice sheets. 1 Thermal expansion Expands when the sea warms up. The heat of the upper layer of the sea is released to the atmosphere at once.

The rise in the average sea level in the world is caused by the expansion of the sea water, melting the ice, mainly due to the rise in the temperature of the earth. However, sea level rise is not uniform, it depends on location. Sea level rise along the coast of California, Oregon, and Washington (hereinafter referred to as the West Coast of the United States) is a regional factor such as the global average sea level rise, the circulation pattern of the North Pacific Ocean and atmosphere, the gravity potential of land ice change depends on. Like the coastal structure deformation effect The relative importance of these elements determines how the local sea level is above or below the global average and how fast it changes. This information is very important for coastal planning.

Sea level rise along the coast of California, Oregon, Washington: past, present and future (2012)

Sea level rise is closely related to rising temperature in the world. Therefore, despite the uncertainty of sea level rise in this century, it is almost certain that sea level rise since the century will bring greater and greater challenges to coastal communities, infrastructure and ecosystems. (Permanent) flood increase, more frequent and extreme coastal floods, coastal landscape erosion, and seawater invasion into coastal rivers and aquifers. In order to assess the vulnerability of sea level rise, it is necessary to consider the physical cause, past evidence, and forecast. From the viewpoint of risk-based sea level rise, it is suggested that it is necessary to emphasize how the sea level change changes coastal areas and interact with coastal scale coastal flood risks.

Coastal floods are becoming more common as sea level rises. More than half of the world's population lives within 40 miles of the sea. As the sea level rises, coastal erosion and flooding forces people to migrate and affects economies that rely on climate sensitive resources such as agriculture. Temperature and rainfall patterns, especially changes in drought, can adversely affect farmers and lead to food insecurity. Bad weather reduces the yield of crops and reduces the production of livestock. This means that incomes of farmers and their families are reduced and people are in poverty. It can also lead to massive food shortages, rising food prices, and even even famine.