Questions tagged [sea-level]
Questions regarding the height of the ocean's surface.
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Why is relative sea-level falling in Hudson Bay?
Why is the sea level in Hudson Bay decreasing so much? Hudson Bay is pretty far up north, much closer to glaciers. Would it make sense for it to recede at this level with sources of fresh water ...
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What fraction of dry land is below sea level?
Someone just asked me if it would be practical to counter the rise of sea level by pumping water into storage on land. It struck me that if there is enough land below sea level, this would require ...
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Would it be geographically feasible to store water on land to counteract sea level rise?
Based on a misunderstanding of another post, I prepared an estimate of how much water would be required to lower sea level by one meter. the main question would be: could this be stored on land?
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How much will sea level rise if all the polar ice melts?
There are many movies about global warming, which say that melting of all polar ice would cause the whole world to suffer a huge flood. According my research (teachers, TV, Internet) people hold one ...
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Are there secondary causes of sea level change?
Aside from the fraction of water stored as ice on land and temperature of the water, are there other factors that change sea level, and if so what are is the magnitudes of the these changes?
For ...
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Effect on sea level if the Earth stopped rotating
Would sea level change at the equator if the Earth stopped spinning? I am assuming it is currently bulging around it due to centrifugal force.
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What is the appropriate vertical datum to use globally?
When studying sea level changes, it is normal to analyze water level with respect to a common vertical datum. The most used datum is Mean Sea Level (MSL), which NOAA defines as "The arithmetic mean of ...
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If ALL the ice melted, what percentage of the Earth's surface would be water?
At the present time, about 70% of the earth's surface is liquid water (perhaps that includes floating ice around Antarctica, and the Arctic Ice cap).
What percentage of the Earth's surface would be ...
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Definitions of tidal harmonic constituents...?
Does anyone know where there is a detailed definition for tidal harmonic constituents? There is loads of stuff on $M_2$, $S_2$, $N_2$, etc. (all the common ones), but there are a great many more, some ...
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If all the world's ice were to melt, would this shift the earth's centre of gravity with consequential effects on sea levels?
This question on Maths SE asked how we might calculate the effect on sea level if all the world's ice (ie including the whole Antarctic ice sheet) were to melt. I posted an answer containing ...
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Is the sea level rise unusual?
I'm discussing climate change with a friend who is a climate change denier, basically the argument is that looking at this graph, is not clear that something unusual is going on, so the sea level rise ...
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How can the world's sea level rise and fall simultaneously?
I have just been reading this article on Gizmodo (known for its hard science I know), that talks about sea level rising by up to 3 feet(!).
In the article and video, created from information from ...
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Historically, how has the fraction of Earth covered by water changed?
Today, 70.8% of the Earth is covered in water (± a few tenths of a percent depending on how you account for lakes).1 How has this figure changed over the history of the Earth, and why?
Of course, if ...
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Potential explanations of Red Sea crossing
I am looking for a believable explanation of the Red Sea Crossing in the Bible. This would involve either strong winds(which is mentioned in the Bible) or plate tectonics which could cause land to ...
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Sea Level in Paleogeographic Maps
Most paleogeographic maps available (C. R. Scotese or R. Blakey maps for instance) show not only the shape of the continents during the concerned period but also the level of the seas and oceans (i. e....
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How will sea level rise be distributed across the globe?
Sea level rise from melting glaciers will not be uniformly distributed across the globe. However, it isn't clear to me what places will have the most and least extreme changes in sea level rise. I ...
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How long to melt all the polar ice?
The answers to this question say that the sea level will rise 66m if all the polar ice, etc, melts.
How long will this take?
Transporting incredible amounts of heat energy to the poles and injecting ...
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How much does sea level rise due to sediment deposition?
There has been a lot of noise in the news in the last few days because Congressman Mo Brooks from Alabama claimed that erosion played a role in rising sea levels. Quoting from Science magazine:
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Does bathymetry affect ocean topography/height?
Here is a map of ocean surface height or topography:
Source: http://www.esa.int/var/esa/storage/images/esa_multimedia/images/2010/12/mean_dynamic_topography_of_global_ocean/9930795-2-eng-GB/...
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Are there any (land) hills/mountains with bases below sea level?
There are areas of land that are in fact, below sea level. Are there any hills or mountains that have bases that start in these below-sea-level areas of land?
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Sea Level Rise due to Climate Change
I've been trying to make sense of the argument surrounding sea level rise and not getting very far.
Those who claim that Sea Level Rise is insignificant generally assert that we have been unable to ...
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Dataset for expected sea level rise in case of massive meltdowns (Greenland/Antarctica)
Around the time climate change became a 'public issue' (let's say shortly after An inconvenient truth came out), figures started getting published about the expected (global) sea level rise in case of ...
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What definition of "seamount" is used by the largest utilised databases of seamounts?
Appears that answering what seamounts are is a non-trivial question. My take is what matters is data, since authoritative opinions on the topic are at best subjective. As such, my position is the ...
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Are the oceans rising or the continents going down? How can we know?
The century old sustained rising of oceans, at a rate of 2-4 mm/y, remains a unexplained phenomenon; there is no correlation with temperature variations, so it is not due to the thermal variation of ...
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When sea level rises, does the increased ocean area cause the earth to cool down somewhat?
When the sea level rises, more of the planet's area is watery and less of it is land. Does this change in surface condition result in a change in global warming, such as a decrease in the net ...
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Why do we measure eustatic sea-level from the center of earth?
Earth is rotating so it has a ellipsoidal shape. The measurement will therefore be different from equator and pole. So why do we measure eustatic sea-level from the center of earth?
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What is the inverted barometer effect?
In a related question (Does bathymetry affect ocean topography/height?), the effect of atmospheric pressure on sea level is described as "inverted barometer". What does it mean? How does it get ...
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What Caused The Sea Levels to Drop During the Maastrichtian Epoch?
Anyone who has studied ice ages would know that during the last two-and-a-half million years of Earth's history, there have been periods where there was enough ice to suck up a lot of water. As a ...
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Global areas below sea level dataset?
Anyone know of an existing dataset of areas below sea level? Vector extents would be ideal. Doesn't need to be super detailed for my purposes, but it would be good if it included all areas (e.g. over-...
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Did we ever record a reduction in sea level when the Panama canal was constructed?
Are any instruments today or at the time of the creation of the Panama canal capable of detecting a reduction in sea level from the creation of it? Given the size of the canal in comparison to the ...
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What is a seamount? [closed]
Per Oxford Dictionary of Earth Sciences: Seamounts are isolated, submarine mountain rising more than 1000m above the
ocean floor. The sharp, crested summits of seamounts are usually
1000-2000m ...
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Is sea erosion the opposite of sea level rising (or rather, an adjacent phenomenon)?
Because I understand the mechanism of sea erosion as to take earth away from shorelines (and scatter it deep into the sea floor) and also to derive from climate crisis, I ask the following question:
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Was the Earth's sea-level significantly lower in ancient times?
A lot of times, ancient artifacts or even whole ancient civilizations are found buried very deep into the ground surface of the earth.
Entire civilizations that had high buildings have been found ...
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If we send ocean waters into glacier of north pole/south pole to reduce sea level, will it help global warming?
this is my first time posting in Earth Science, please be gentle to me.
I am Science Enthusiast, though numbers are my enemies for now so I can't come up with formulas or any form of calculations. ...
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Hypothetically, would digging a big trench from the ocean and flooding desert areas be a bad solution to combatting sea level rise? [duplicate]
My question is basically the title. Ignoring most of the feasibility of the enormous engineering and earthmoving requirements (I guess I mean to say, given an unlimited budget) in very hot areas, ...
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