Questions tagged [sea-level]
Questions regarding the height of the ocean's surface.
84
questions
1
vote
1answer
25 views
Regional and Relative Sea level
I am a little confused by the terms "regional" and "relative" in the sea level change context.
Do the two words have the same meaning? Does the "regional MSL trend" in https://www.aviso.altimetry.fr/...
14
votes
2answers
3k views
Why doesn't sea level show seasonality?
North-hemisphere ice-shelf melts on summer and grows on winter. I would expect appreciable changes on sea-level between seasons, but sea-level looks equal on winter than on summer.
Why doesn't sea ...
2
votes
1answer
28 views
What is the effect of sea-level changes on the extent of the Earth's atmosphere?
If sea-levels rise, does the Earth's atmosphere extend to the same distance out to space, with the pressure increasing, or does it expand?
If sea levels rose 10m, how much change would there be to ...
4
votes
1answer
119 views
Understood cause of sea level rise between 1850 and 1950
This question is based on the following graph from a 2018 report by J. Curry.
(I haven't found any peer-review of the report itself so I can't vouch for the validity of its claims, but that's not the ...
1
vote
0answers
34 views
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
6
votes
1answer
99 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 ...
4
votes
1answer
62 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 ...
36
votes
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 ...
6
votes
1answer
268 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 ...
9
votes
2answers
225 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
votes
3answers
366 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 ...
4
votes
1answer
165 views
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 ...
5
votes
2answers
2k views
How would Earth map look like if all ice melts?
Is there somewhere a map which indicates which areas and cities become sea?
3
votes
1answer
81 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 ...
2
votes
0answers
99 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 ...
4
votes
1answer
78 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 ...
8
votes
1answer
997 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:
...
22
votes
2answers
7k views
“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 ...
9
votes
1answer
281 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 ...
2
votes
2answers
568 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?
5
votes
2answers
474 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 ...
1
vote
2answers
263 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 ...
1
vote
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 ...
1
vote
2answers
47 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 ...
13
votes
3answers
4k views
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 ...
0
votes
1answer
573 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, ...
3
votes
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 ...
3
votes
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?
2
votes
1answer
619 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 (...
2
votes
1answer
110 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 ...
7
votes
1answer
123 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 ...
5
votes
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.
0
votes
0answers
51 views
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 ...
3
votes
0answers
82 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 ...
2
votes
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 ...
3
votes
1answer
108 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
votes
1answer
80 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 ...
9
votes
3answers
739 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 ...
2
votes
1answer
183 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 ...
6
votes
1answer
256 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 ...
10
votes
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 ...
4
votes
2answers
958 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 ...
3
votes
1answer
241 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 ...
8
votes
2answers
879 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?
5
votes
1answer
950 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 ...
0
votes
2answers
288 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 ...
7
votes
3answers
1k 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 ...
2
votes
2answers
119 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, ...
6
votes
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 ...
6
votes
2answers
707 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 ...
