Questions tagged [sea-level]
Questions regarding the height of the ocean's surface.
104
questions
1
vote
1answer
50 views
Why are the south, the west and the north of the Caspian sea lush but its east completely dry?
About the Caspian sea area today:
The south is very lush with the subtropical forests of the Iranian provinces of Gilan, Mazandaran and Golestan (although less "tropical" in Golestan)
The ...
3
votes
1answer
49 views
Was Zealandia above water during the last Ice age?
Was Zealandia above sea level during the last ice age? Like how Sahul or Sundaland were?
1
vote
1answer
78 views
It is possible to reduce global sea level via filling empty lowlands with ocean water? [duplicate]
There are empty lowlands in Australia and Iran like Dasht-e Lut. If we fill these lands with ocean water then could we reduce the global sea level and save coastal cities like venice?
0
votes
2answers
40 views
Are marine fossils in the mountain happens due to lower sea levels?
https://9gag.com/gag/aBme0M2
This one says it is
I am not sure whether to ask this in geology or biology.
How does marine fossils show up in mountains?
4
votes
1answer
39 views
How far would average sea level rise from a 25% increase in total ocean volume?
What amount of average sea level rise (in meters above 2020 levels) would be associated with a 25% increase in total ocean volume?
The reason I ask is because of this study that indicates Earth has ...
4
votes
3answers
114 views
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 ...
4
votes
2answers
214 views
Why is the creation of water from the combustion of hydrocarbons not listed as a cause for rising sea levels?
https://iopscience.iop.org/article/10.1088/1748-9326/aa8390
According to this paper, water is created by burning hydrocarbon fuels. It seems like a major thing to exclude from "reasons the sea ...
1
vote
0answers
55 views
The seemingly impossible formation time for the local sea arches and caves
I live in Hong Kong. As a nature lover, I often spend time visiting the south-eastern coasts of Sai Kung Peninsular - a local nature reserve.
The area's famous feature is the coastal erosion landscape....
2
votes
1answer
71 views
Is there any animation to demonstrate if the sea level rise up?
I found a very cool video here:
Draining Earth's oceans, revealing the two-thirds of Earth's surface we don't get to see
https://www.youtube.com/watch?v=-uOwv_Krqk8&feature=emb_logo
However, I ...
1
vote
0answers
36 views
What will the sea level be when the ice caps/glaciers melt? [duplicate]
I have my views and you have yours, so I ask a question, what was the average sea level in Athens, Greece 2,720 years ago? What was the average sea level in ancient Rome 2,420 years ago? https://en....
3
votes
2answers
106 views
Does Earth's rotation cause sea levels to increase from east to west?
Intuitively if the Earth were to rotate fast enough from west to east, the average sea level would be noticeably higher on the west edge of the oceans. Does Earth's rotation cause this effect in ...
3
votes
0answers
80 views
Mass budget of coastal erosion and ocean deposion
This question made me wonder: how much mass (or volume) of material is eroded by the sea each year? Of this mass, how much is deposited in the oceans? (As Michael pointed out in his answer, part of ...
3
votes
2answers
547 views
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:
...
5
votes
1answer
243 views
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 ...
5
votes
1answer
114 views
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-...
2
votes
2answers
652 views
Could pumping ocean water into desert areas help reduce sea level rise?
I have been reading the discussion about pumping sea water into the desert for purposes of irrigation and changing the dry climate of that area, but what about to just purely offset the rising sea ...
4
votes
1answer
103 views
History of the Arctic Ocean
Much of the Arctic Ocean is fairly shallow compared to other oceans. There must have been times in the past during severe ice ages that a lot of what is now the ocean bed was above sea level. When was ...
0
votes
1answer
149 views
Migration Routes for Animals from Asia to America [closed]
The jaguar is a close relative of the Asiatic leopard and must have had a common ancestor within the last 5 million years. The South American tapir is obviously closely related to the Malayan tapir ...
5
votes
3answers
5k views
Are we experiencing lower level of gravity now compared to past?
Whole civilizations have been buried underground and we have built new landscapes over them.
The fact that tall buildings and houses are being excavated from under the ground means that we are living ...
1
vote
0answers
25 views
Are there models of mortality due to sea level increases (via climate change)?
In a self-answer of mine on Skeptics, one of the comments rightly pointed out that the model in question (from Impact Lab) does not explicitly account for mortality due to sea level changes. Are there ...
1
vote
1answer
34 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/...
15
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
31 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
177 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
45 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
152 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
76 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
9k 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
1k 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
262 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
414 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
240 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
5k 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
187 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 ...
3
votes
0answers
574 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
101 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 ...
10
votes
1answer
2k 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
8k 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
470 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
854 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
661 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 ...
2
votes
2answers
598 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
49 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
50 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 ...
14
votes
3answers
5k 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
845 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
53 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
280 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
1k 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
142 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 ...
