72 votes
Accepted

Is the sea level rise unusual?

The problem is the increase in the rate of sea level rise. I pulled out some approximate numbers from the figure you presented: Can you see now how the sea level is rising much faster today than a ...
Camilo Rada's user avatar
  • 17.6k
27 votes
Accepted

"Five of the Solomon Islands disappeared" due to sea level rise, how is this possible so quickly?

The sea is not the only thing that rises, the sea floor can also rise and fall in accordance with the underlying geology. Oceanic tectonic plates sink as they age (and thus get colder and denser), the ...
John's user avatar
  • 6,906
25 votes
Accepted

Why doesn't sea level show seasonality?

Sea level has a strong seasonal signal. The annual variability is less than the daily changes associated with tidal forcing in most locations, but still can be on the order of 5-10 cm (maximum values ...
arkaia's user avatar
  • 15.4k
22 votes
Accepted

Is there a geological explanation for the recent Mammoth tusk discovery 185 miles off the California coast?

The mammoth probably died on land. Its remains got picked up by a glacier. The glacier carried the tusk down to the sea. Eventually, the ice containing the tusk broke off as an iceberg. The iceberg ...
Spencer's user avatar
  • 3,548
19 votes
Accepted

Are we experiencing lower level of gravity now compared to past?

Earth's radius is about 6400 kilometres. That's 6400000 metres. Let's say that you have a mound 20 metres high, burying an older settlement. Your new "radius" is now 6400020 metres. Let's say that $g ...
Gimelist's user avatar
  • 23.1k
18 votes

How much does sea level rise due to sediment deposition?

In a 1983 Journal of Geology paper by Milliman and Meade, "World-Wide Delivery of River Sediment to the Oceans" (link) it is estimated that the world's rivers carry about $13.5\times 10^9$ tonnes of ...
Floris's user avatar
  • 1,384
18 votes
Accepted

Would the US East Coast rise if everyone living there moved away?

The mass of human bodies across the US East coast (about 120 million for the East coast States) is very small compared to Greenland ice mass loss, which (according to Grace Satellite data) has ...
Ken Fabian's user avatar
  • 2,066
17 votes

Are there any (land) hills/mountains with bases below sea level?

It's difficult, because to truly have a base below sea level the hill or mountain needs to be surrounded by locations below sea level on all sides. There aren't many spots on Earth's surface away ...
JeopardyTempest's user avatar
14 votes

Sea Level Rise due to Climate Change

The first part of the association is that increasing levels of greenhouse gases in the atmosphere will cause rising temperatures on earth. Here is some information on why that is so, if you are ...
kingledion's user avatar
  • 3,376
14 votes

Is the sea level rise unusual?

The problem is that sea level is increasing faster than ever in last couple thousand years. It is currently rising at 3.2 mm/year according to satellite data: The curve you showed is not a straight ...
Pedro's user avatar
  • 373
13 votes
Accepted

Does the 0m elevation height of a Digital Elevation Model (Copernicus DEM) correspond to mean sea level?

From the website you linked: Coordinate Reference System: Horizontal WGS84-G1150 (EPSG 4326) (DGED & DTED format), (EPSG 3035) for continental Europe and UTM , (EPSG 32740, 32622, 32738, 32620) ...
arkaia's user avatar
  • 15.4k
12 votes
Accepted

Will increased precipitation in Antarctica prevent sea level rise?

There is some scope for continuing debate because quantifying the various components of the ice/snow/water balance are fraught with difficulty, and many of the estimates have error bounds which ...
Gordon Stanger's user avatar
12 votes

Is the sea level rise unusual?

Sea level rise from thermal expansion is a very slow process: oceans are 3.7 km deep on average, and water has a very large specific heat capacity. Here's a related diagram from the IPCC Third ...
Eric Duminil's user avatar
11 votes

Why is the creation of water from the combustion of hydrocarbons not listed as a cause for rising sea levels?

1.2 x 10^13 kg equals 12,000,000,000,000 l water. One liter equals 0.001 m³, while one km³ equals one billion (1 x 10^9) m³. So we're supposedly adding 12 km³ water to the atmosphere per year. ...
Erik's user avatar
  • 756
10 votes

How will sea level rise be distributed across the globe?

There are many factors involved, so this is worth yet another answer. At the end of his/her answer aretxabaleta states: In general, the areas near the poles have a negative trend (sea level is ...
Jan Doggen's user avatar
  • 2,679
10 votes

Is the sea level rise unusual?

I think this XKCD says it all:
Tim B's user avatar
  • 201
10 votes
Accepted

Does melting sea ice rise the global sea level?

"Sea ices" - if referring to all kinds of ice floating in oceans - is not the same as "sea ice"; sea ice is specifically referring to seawater that has frozen and the total amount ...
Ken Fabian's user avatar
  • 2,066
9 votes
Accepted

Why do high tides vary month to month?

The dynamics of the tides are quite complex. The main idea is that gravity from the Moon and the Sun affect water (and everything else) on Earth. The issue is that there are several motions that alter ...
arkaia's user avatar
  • 15.4k
9 votes

Coral growth keeping up with sea level rise?

I have worked as a climate-change specialist in many countries including those with coral atolls, such as the Maldives, Solomon Islands and Samoa. I have analysed, at first hand, both the the tide-...
Gordon Stanger's user avatar
9 votes

"Five of the Solomon Islands disappeared" due to sea level rise, how is this possible so quickly?

Sea level rise is faster in the western tropical Pacific than anywhere else, and a principal reason for this is the intensifying easterly trade winds over the tropical Pacific during the last two ...
Jacob Socolar's user avatar
8 votes
Accepted

How will sea level rise be distributed across the globe?

Sea level rise (SLR) is anything but spatially uniform. The satellite derived SLR rates that you present are a good example of the complexity of the spatial response. A good way to explore the ...
arkaia's user avatar
  • 15.4k
8 votes

How is sea level measured?

There are two main approaches to measuring sea level (and thus its change): local and satellite-based. To measure local sea level we can set up gauges on the coast that record the water level every ...
Semidiurnal Simon's user avatar
8 votes

If ALL the ice melted, what percentage of the Earth's surface would be water?

As @gerrit commented, a precise calculation would need to incorporate a litospheric model to account for isostatic post-glacial rebound. But the "blurry approximation" you want, can be obtained based ...
Camilo Rada's user avatar
  • 17.6k
8 votes

Is the sea level rise unusual?

In addition to other answers... This curve isn't a good comparison to the "natural" state of the Earth, because it starts in 1880. The Industrial Revolution had been in full swing for some time by ...
Graham's user avatar
  • 437
8 votes

Global areas below sea level dataset?

You could try building one using a global Digital Elevation Model. There are several freely available like TanDEM-X, SRTM, or ASTER GDEM. You'd have to look for all the pixels containing a negative ...
Jean-Marie Prival's user avatar
8 votes

Are there any (land) hills/mountains with bases below sea level?

Mauna Kea is a good example of this. It is generally considered as the tallest mountain on Earth. Even if its elevation is only 4205 meters above sea level, if you add the 6000 meters of its below sea ...
Jean-Marie Prival's user avatar
7 votes

Is there enough water to cover the surface of a topographically normalized earth?

Here is a very simplistic approximation: The total volume of the oceans (no lakes, rivers, water vapor) is around $1.3\ 10^9$ cubic kilometers. The surface area of Earth is around $5\ 10^8$ square ...
arkaia's user avatar
  • 15.4k
7 votes

Was the Earth's sea-level significantly lower in ancient times?

There are several questions here, I'm only focusing on the question regarding sea level in the past as per the title question. In short, global mean sea level (GMSL) has been both lower and higher ...
Tom Newton's user avatar
7 votes

How would Earth map look like if all ice melts?

Calculated Earth is one of the better tools for this, you can either zoom in and get various flood stages or set a specific flood stage and see what would flood, it is in metric though so you may need ...
Ash's user avatar
  • 4,260
7 votes

Would the US East Coast rise if everyone living there moved away?

While the weight of the population removed might not have much effect, stopping the removal of groundwater could potentially have a fairly large effect on the height relative to sea level. Lots of ...
Tom Pridham's user avatar

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