Graphics

Land uplift

Land uplift decelerates relative sea-level rise.

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Land subsidence

Land subsidence accelerates relative sea-level rise.

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Diagram A and B

Diagram A illustrates equatorial ocean syphoning, which refers to the flux of water away from far-field regions, while diagram B illustrates continental levering, which refers to ice melt which depresses the continental shelves and causing adjacent continents to be lifted.

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The Three Milankovitch Cycles

Natural variations in Earth’s long-term climate drive the shape of Earth’s orbit (eccentricity) around the Sun, the angle of Earth’s axis (obliquity), and the wobble of Earth’s axis (precession).

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Marine Ice-shelf Instability

Thinning of the buttressing ice shelf leads to acceleration of ice sheet flow and thinning of the marine-terminated ice margin. As bedrock under the ice sheet slopes towards the ice sheet interior, the thinning of ice causes the grounding line to retreat.

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Marine Ice-cliff Instability

Ice cliffs are produced when the ice shelf disintegrates because of bottom melting, where warm ocean waters seep beneath the ice sheet causing it to melt from the bottom up, and/or hydro-fracturing, where the ice sheet is destabilised because of cracks in its internal structure.

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Regional Monsoon

Regional driver of sea-level change due to seasonal monsoon in Southeast Asia. Sea level falls near the Singapore Strait during the southwesterly winds of the summer monsoon and rise during the northeasterly winds of the winter monsoon.

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Current flowing toward coast

A stronger surface ocean current toward the coast causes a rise in sea level near the shore, while a weaker surface current leads to a fall in sea level.

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Storm Surge

Increasing sea levels cause the base for extreme events such as storm surges to rise, raising their maximum run up heights and the inland distance they affect.

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Coastal Current

Stronger boundary currents toward a coastal location cause sea-level rise, while weaker boundary currents or those flowing toward the open ocean lead to sea-level fall near the reference coastal area.

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Atmospheric

Process of sea-level rise or fall due to impact of high and or low pressure.

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Tectonic Uplift or Subsidence

Process of sea-level rise or fall due to tectonic plates colliding causing uplift or subsidence.

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Ice Mass Loss

Process of sea-level rise due to land-based ice sheets mass loss and, conversely, a sea-level fall when sea water transfers into land-based ice sheets.

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Thermal Expansion

Process of thermosteric sea-level rise due to an increase in the temperature (beyond 4 degrees Celsius) of seawater and, conversely, a sea-level fall when the temperature of seawater decrease

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Glacial Isostatic Adjustment

The process of land moving up and down in response to the load of an ice sheet and the transfer of mantle back and forth creating a forebulge.

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Vertical Land Motion

The process of land subsidence from compaction due to urbanisation and/or ground water withdrawal exacerbating sea-level rise.

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Static Equilibrium Effects

The process of water being attracted to an ice sheet due to its gravitational pull and conversely water retreating as ice melts and its gravitational pull weakens.

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Subduction zone beneath Java, Bali and Lombok islands, Indonesia

Block-diagram showing a cross-section of the subduction zone beneath the islands of Java, Bali, Lombok and Sumbawa in Indonesia. The Indo-Australian tectonic plate (on the left) dives under the Eurasian plate (on the right).

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Subduction zone beneath the Philippines

Block-diagram showing a cross-section of the subduction zone beneath the Philippines. The Philippine tectonic plate (on the right) dives under the Eurasian plate (on the left).

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Subduction zone beneath Sumatra, Indonesia

Block-diagram showing a cross-section of the Sunda Megathrust. The Indo-Australian tectonic plate (on the left) dives under the Eurasian plate (on the right).

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