Questions tagged [sea-level]
Questions regarding the height of the ocean's surface.
80 questions
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Topography and flash flooding
I'm looking for a study or document showing the effect of the topography, slopes, the sea level and the tide on flash flooding occurrence.
Thanks in advance
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1answer
94 views
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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1answer
55 views
Waterlevel increase calculation
So I tried to calculate the rise of waterlevel myself. But the results I have gotten seem to be pretty low:
Given the earths radius, I clalculated different Events:
1) If all landice melts there is ...
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6answers
8k views
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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1answer
218 views
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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2answers
211 views
How was Venice flooded?
If I understand this correctly, Venice was not flooded due to sudden rainfall causing rivers to overflow, but due to the high tides. These high tides were caused by an alignment of sun, which was ...
9
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3answers
248 views
How is sea level measured?
In comments on Earth changes due to global climate change, sea level changes is a common topic. I hear quotes about sea level changes in the centimeter and even millimeter range and wonder how such ...
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1answer
119 views
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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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2answers
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How would Earth map look like if all ice melts?
Is there somewhere a map which indicates which areas and cities become sea?
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1answer
77 views
What was the percentage of land mass in prehistoric times when temperatures were high enough that we had no ice caps?
I grew curious after watching a presentation about the large creatures of prehistoric times. One of the theories cited about why creatures were so big was the increased oxygen in the atmosphere due to ...
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0answers
81 views
How much ocean water is currently being displaced by ships?
According to Statista, as of January 2017, there are approximately 52,000 ships currently operating in the merchant fleet and 11,000 of these are considered bulk carriers.
How many ships are there ...
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1answer
70 views
Do ocean level rise estimates account for mantle elasticity and plate mass changes?
In the mainstream media the problem of ocean level rise is presented rather... over-simplistically - ice melts -> more water flows into the oceans -> water level rises -> continents sink.
But it is ...
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1answer
872 views
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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2answers
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“Five of the Solomon Islands disappeared” due to sea level rise, how is this possible so quickly?
The text of the introduction to the BBC Podcast Sea Levels Rise; The Compass, Living on the Edge Episode 1 of 4 says:
Five of the Solomon Islands have disappeared, many more are becoming ...
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1answer
251 views
Is altitude of everything decreasing due to sea level rise?
We know that sea level is rising, though some people say climate change is fake.
Altitude is defined as the height of something measured from sea level.
Since sea level is increasing, and the ...
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2answers
473 views
Estimated volume, daily or annually, of sea level rise due to melting ice?
Its a big number, difficult to estimate I assume. But is there a peer reviewed estimation (at current conditions) of the volume of daily or annual increase of water?
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2answers
443 views
estimation of prehistoric sea levels
From what reference point/level are prehistorical (e.g., Precambrian era) sea levels estimated? As I understand things, the following are true:
Since the formation of continents, land elevations ...
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2answers
251 views
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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1answer
47 views
Approximation of ancient landmasses using current ocean floor data
I am wondering how accurate such an approximation would be. I wish to take a current height map of the earth (including the ocean floor) and approximate the form of ancient landmasses by changing the ...
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2answers
45 views
Data sets for historical sea level estimates
I am looking for data sets for historical global sea level estimates. How would I go about doing this the best way? Are there any publicly available resources for this?
The timespan I am looking at ...
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3answers
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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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1answer
508 views
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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1answer
50 views
Beringia - history of the region, periods of sea level fall/rise - paleogeography of Pleistocene
I am trying to find any published (not wiki) source of information about how many times and when exactly the Bering Land Mass was free of water. Everything that I find is just pieces of information in ...
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1answer
135 views
Is there enough water to cover the surface of a topographically normalized earth?
Is there enough water in the oceans, ice caps, rivers and streams to cover a completely flattened earth, in proportional to land volume and water volume?
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1answer
576 views
How to determine ocean bottom depth for a data set consisting of longitude and latitude?
Given a data set which consists of pairs of longitudes and latitudes, is it possible to determine an estimate of the ocean bottom depth at that point?
I can find maps of estimated sea depths online (...
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1answer
108 views
What current evidence is there for a Glacial Hudson River Valley deluge?
Some have studied the Lake Missoula glacial dam breaking West and having created the Coulees of Eastern Washington. Who's studied the glacial dam breaking South and having cleared the Hudson River ...
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1answer
119 views
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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1answer
2k views
Why do high tides vary month to month?
I've noticed that some ‘highest‘ high tides in one month are bigger than the highest high-tide of previous months. Why is this so? I've always been stumped on this one.
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0answers
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Changes in rainfalls, sea level and tropical cyclones
Is there any scientific evidence that exploitation of natural resources (fossil energies, forests etc.) affects rainfalls or sea level, which can represent extreme events?
I read IPCC 2014 report and ...
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0answers
74 views
Rising sea level: flooding of iconic buildings
I realize that this question may be arguably off-topic, but there doesn't seem to be a stack exchange specific to oceanography, geography, or architecture.
With rising sea level in mind, how high ...
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1answer
4k views
How to identify low or high pressure area
If rain is due to the flow of humid air from a high pressure area to a low pressure area, without the use of devices, technology or mass media is it possible to detect regions of high or low ...
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1answer
106 views
Do any rivers deposit sediment in their deltas fast enough to counteract sea level rise?
Assume a 1m per century sea level rise. Looking at a topographic map it quicly becomes clear that Bengal, the Netherlands, the lower Mississippi, South American Mesopotamia, etc will all soon be ...
3
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1answer
79 views
What would be the sea level rise if all fossil fuel resources are burned?
Tokarska et al. (2016), a Nature article from a team of the University of Victoria, predicted a global temperature increase of 7±2.5°C and 17.2±2.5°C at the equator and at the poles ...
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3answers
703 views
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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1answer
177 views
How to correct PSMSL data for GIA?
I have a PSMSL RLR (revised local reference) sea level dataset with records from various tide gauges. Can anyone explain how to correct them for GIA (glacial isostatic adjustment) using the ICE-5G ...
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1answer
247 views
Coral growth keeping up with sea level rise?
On 11 sep 2016, the Australian Herald Sun placed an opinion piece by Andrew Bolt titled Drowning in cash: Pacific islands love this scare* about the $300 million** financial aid pledged by the ...
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3answers
1k views
Will increased precipitation in Antarctica prevent sea level rise?
It has been suggested that global warming will lead to increased precipitation in parts of Antarctica. This would sequester water in the ice sheet, preventing sea level rise.
However, the slope (and ...
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2answers
909 views
When specifying phase and amplitude for a tidal constituent, what date/time does phase start from?
It is common to describe tidal elevations at a given location by giving the phases and amplitudes of tidal constituents. One such application is for setting the open boundary conditions for regional ...
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1answer
227 views
Effects of pressure at sea level
According to this answer atmospheric pressure can vary between 870 and 1070 mb.
Can you tell what (if any) effects would there be on sea level if such difference of pressure (200 mb) on two near ...
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2answers
800 views
How to measure elevation above sea level
Elevation is often measured in terms of "[unit of length] above sea level." Considering that the oceans aren't a uniform height, how is this measured?
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1answer
907 views
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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2answers
278 views
A guide to how climate change will affect different countries [closed]
Let's assume that the climate change won't be prevented. I'm looking for a guide to show how the climate change will affect different countries.
Specifically, I'm interested in comparing following ...
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3answers
988 views
How were the sea levels around western Europe during the Medieval Warm Period?
The Medieval Warm Period (MWP) or Medieval Climatic Anomaly was a time from about 950 to 1250 when climate was warmer than in the timespans immediately before and after.
My question is if this ...
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2answers
116 views
Modelling sea levels with gravitational parameters
Are there any publicly available programs or source code for modelling global (or local) changes in sea level which include parameters for gravitational tidal effects?
I have a physics background, ...
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2answers
1k views
How far upstream would severe sea level rise (1m) noticably affect a large river?
The projection for sea level rise due to global warming seem to hover about 1m by 2100, let's use this figure. How far upstream would this noticably affect a large river, e.g. the Rhine?
I think it ...
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2answers
669 views
Water levels: What does “mBf” mean?
I have seen the term MBf used in a couple of places (a ramp specification and a Hydrological Study) to describe height or depth of water. What is this unit? Can it be converted to meters?
For bonus ...
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1answer
300 views
Best book/s of oceanic data treatment and analysis?
I would like to purchase a/some books which are really good and practical references to get into the oceanic data (wave heights,currents and sea level) treatment and statistical analysis, coming from ...
6
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1answer
174 views
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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2answers
303 views
Have there ever been any islands that disappeared due to rising sea level?
With global warming comes rising sea levels. This has been going on for at least fifty years.
So haven't there been some islands that have been swallowed by now? An island could be nothing more than ...
4
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1answer
80 views
What causes variation of seabed depth relative to fixed chart datum?
Please refer to this page of coastal wiki. Quoting:
...the reconstructed overall vertical position [of the seabed] with respect to a fixed chart datum may vary by more than 10 cm from survey to ...
