IAS (Admin.) Mains Geography Oceanography-Sea-Level Changes Study Material (Page 1 of 5)
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Sea-Level Changes: Measures of Sea Level, Causes of Sea Level Change
Numerous factors contribute to long and short-term sea level variations.
- Short-term variations generally occur on daily basis and include waves, tides, or specific flood events, such as those related with snowmelt, hurricanes, or other coastal storms.
- Long-term variations occur over varied time scales, from monthly basis to many years, as repeatable cycles, slow trends, or erratic anomalies.
Short-term variations are discussed in other topics. This section focuses on long-term sea level changes, especially the current problem of sea level rise.
Measures of Sea Level
- Local Sea Level: Tide stations measur…
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Sea-Level Changes: Global Sea Level Rise
Global Sea Level Rise
Global sea level rise refers to the currently observed increase in average global sea level. Since the mid-19th century, sea level has been rising, likely primarily because of human-induced climate change. Intergovernmental Panel on Climate Change (IPCC) Report estimates that global sea level rise was approximately 1.7 - 1.8 mm per year over the past century. This estimate is based on tide station measurements worldwide and projected trends are based on global climate models. Sea l…
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