Some cities are to said to disappear if the sea level increases? Why so?

Some cities are to said to disappear if the sea level increases? Why so?

Geek Evident Asked on November 22, 2017 in environment.
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      The concern about certain cities disappearing or facing severe consequences due to rising sea levels is primarily associated with the effects of climate change, specifically global warming. Here are the key factors contributing to this concern:

      1. Melting Ice Caps and Glaciers:
        • As global temperatures rise, polar ice caps and glaciers are melting at accelerated rates. The melting of these ice masses contributes to the rising sea levels. This phenomenon is particularly evident in the Arctic and Antarctic regions.
      2. Thermal Expansion of Seawater:
        • When water heats up, it expands. As the Earth’s temperature increases, the ocean absorbs heat, causing the seawater to expand. This thermal expansion is a significant contributor to the rise in sea levels.
      3. Sea Level Rise:
        • The combination of melting ice and thermal expansion leads to a rise in global sea levels. This rise is not uniform across the planet, and some areas may experience higher sea level increases than others.
      4. Subsidence and Land Sinking:
        • In addition to rising sea levels, some coastal areas are experiencing subsidence, which is the sinking of land. Human activities, such as groundwater extraction and the weight of infrastructure, can contribute to land subsidence. When combined with sea level rise, it exacerbates the risk for coastal areas.
      5. Storm Surges and Flooding:
        • Rising sea levels increase the risk of storm surges and coastal flooding during severe weather events, such as hurricanes or typhoons. Higher sea levels provide a higher starting point for storm surges, leading to more extensive inundation of coastal areas.

      Cities located at or below sea level, on low-lying coastlines, or in regions vulnerable to storm surges are particularly at risk. Some cities facing notable risks due to rising sea levels include:

      • Miami, USA: Miami is situated on a low-lying coastal plain and faces challenges from both sea level rise and storm surge events.
      • Bangkok, Thailand: Bangkok is prone to both land subsidence and rising sea levels, making it vulnerable to flooding.
      • Dhaka, Bangladesh: Dhaka is located in a delta region and is susceptible to both sea level rise and river flooding.
      • Venice, Italy: Venice is built on a series of islands and islets in a lagoon. It has experienced issues related to both subsidence and rising sea levels.

      Efforts to mitigate the impacts of sea level rise include coastal protection measures, infrastructure improvements, and global initiatives to reduce greenhouse gas emissions contributing to climate change. Adaptation strategies are crucial for the resilience of coastal communities in the face of ongoing environmental changes.

      Geek Evident Answered on January 24, 2024.
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