Questions tagged [oceanography]

Oceanography is the branch of Earth science that studies the ocean. It is also known as oceanology.

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127 views

Does being under water provide any protection from a asteroid?

Does being under or on water provide any protection from an asteroid hitting the opposite side of the Earth over being in or on land or in air? Why? Will the shock wave follow the curvature of the ...
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What are the sunniest places on Earth? (including oceans)

This question did arise when thinking on offshore solar power plants, what's their potential, and how efficient would they be compared with land based counterparts. Recently, it is becoming more ...
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Reason for higher content of Iodine and Copper than Iron in Seawater?

Does mineral weight contribute to the prevalence of minerals in seawater? Why is there five times more copper in seawater than Iron? Why is there 4000 times more strontium in seawather than Iron, ...
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How much plastic settles to the bottom of the oceans each year?

This article says that 5 to 13 million metric tons of plastic go into the ocean every year. In the study At what point do floating plastics sink?, they give an estimate of the weight needed to sink ...
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172 views

Searching for common wave vocabulary

What do you call the leading waves and activity leading before a large wave?
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How would a world entirely covered in oceans get the nutrients to support life?

On earth nutrients flow from the land to the ocean. Life on oceans need those nutrients to trive. I was trying to think how an ocean world might support life if there was no land to provide the ...
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196 views

barotropic component definition

In this paper the author calculated the barotropic component $u_{bt}$ of the current $u$ as: the vertical mean velocity weigthed with the depth differences If I am not wrong, in a continuous case,...
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59 views

baroclinic current - dimensional analysis

I am puzzled by the dimensions of the formulas given here for the baroclinic component of ocean currents (first terms on the right-hand side of formulas 5 and 6). If I am not wrong: [f]=1/s [$\rho$]...
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Is the theory of hot spots compatible with lengthy volcanism?

The island of St Helena was volcanically active for five million years or longer. The island is located on the African plate and in that period of time would have moved at least a hundred miles or ...
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57 views

Saltwater River Freeze and Thaw

We live in a house overlooking a salt water river. We overlook a cove. The river feeds into Narragansett Bay in Rhode Island. In the 17 years we have lived here, the river has frozen several times. ...
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195 views

What is this island or reef 600 km east of Marianas Islands?

This map shows an island a bit east of the Marianas. I took a screenshot of the relavent part. I hunted around for it in Google Earth with no luck, but I did find a promising candidate here: I could ...
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Satellite ocean near-surface air temperature data

For my study, I need to use satellite Sea Surface Temperature (SST) and at the same time I also need satellite air temperature data (Ta) for the first few meters above the ocean. For SST I'll be ...
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161 views

What controls the acidity of the ocean?

I have learned that: coral reefs are made up mostly of calcium carbonate coral reefs are mainly distributed in the tropical zone The calcium carbonate will be decomposed in the reaction as ...
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Why is carbon pollution given more importance than Sulfur pollution or Nitrogen pollution?

Nitrous oxide ($N_2O$) - primary greenhouse gas Carbon dioxide ($CO_2$) - primary greenhouse gas Methane ($CH_4$) - primary greenhouse gas, explosive Nitrogen monoxide ($NO$) - secondary greenhouse ...
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Change on naval distances

I am working on a shipping company and we have several applications to calculate the distance between two ports. My curiosity was triggered by the fact that, time by time I see a small change on the ...
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150 views

Is this why oceans are salty?

From noaa.gov's Ocean facts: Salt in the ocean comes from rocks on land. The rain that falls on the land contains some dissolved carbon dioxide from the surrounding air. This causes the ...
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Issues with projection and fig using python and mpl_toolkits.basemap

I currently have depth data that I am plotting with the code below. The problem that I am having has to do with the figure python is spitting out. The figure is really tiny. I have tried a few things ...
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241 views

Why does the colour of Earths oceans vary?

Why does the colour of Earths oceans vary? Coast lines around the world appear to have different shades of blue. The further one travels from the equator north or south the deep blue the ocean ...
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1answer
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Do I need a permit for putting retrievable sensors in ocean (Atlantic)?

The project would be to place about a dozen sensors in "swarm" fashion and have them collect data from the Atlantic ocean. The sensors would be about the size of a softball and would be retrieved ...
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Current contaminant levels from Deep Water Horizon oil spill?

The Deep Water Horizon oil spill occurred in 2010 and is known as the largest marine oil spill ever. I heard on the radio the other day, from a not so reliable source, that contaminant levels have ...
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Regarding compression, shuffle filter of netcdf4

I read the doc but still have no idea about what are the advantages to enable or disable the shuffle, what level [0-9] of compression is optimal, what's the best choice of chunk size?
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Would the oceans have boiled off if life (cyanobacteria) hadn't evolved on Earth?

The emergence of cyanobacteria caused removal of carbon dioxide from the atmosphere, resulting in Earth becoming cooler. That perhaps implies that the Earth's oceans would have boiled off (in billions ...
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246 views

What mechanism is used to measure ocean currents from cables?

The volume transport of the Florida Current (one of the parts of the Gulf Stream) is measured using an underwater cable. What are the processes that allow for these measurements? How can we obtain ...
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Guinea Current existence in the Atlantic

Why does the Guinea Current exist at all? There are no similar currents in the Pacific or Indian Oceans and the Guinea Current also disappear during northern summers. Why?
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Rossby radius as horizontal scale

In the introduction of "Geographical and monthly variability of the first baroclinic Rossby radius of deformation in the South China Sea", the authors states: In both theoretical and observational ...
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Can strong winds significantly lower ocean surface levels, or is it really the static pressure differences?

The Washington Post article Hurricane Irma is literally sucking the water away from shorelines written by the Post's atmospheric scientist Angela Fritz describes leads with this: As a meteorologist,...
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460 views

Which parts of the ocean have been explored?

So there's a sea, right by my house. How do I know if it's been explored, and what info do we have about it? According to the internet, about 5-10% of the world's oceans has been explored. Is there ...
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Is the seafloor of the Gulf of Mexico and Caribbean Sea mostly sedimentary rock?

This comes from a related question about predicting oil (or not) in the deep sea, not just the continental shelf. Apparently the deep seafloor is igneous, which lowers its chances of holding oilfields....
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223 views

Are there probably decent oil fields located in the middle of the ocean?

I did a google image search for a world map of offshore oil. Surprisingly I found virtually nothing. I had to search country by country for such maps. I noticed most if not all were located very near ...
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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 ...
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What would be the depth variation of a “water ellipsoid” above a reference ellipsoid Earth?

The question If the Earth was a smooth spheroid how deep would be the ocean? has an excellent answer which explains the shape and surface area of an oblate spheroid before calculating the average ...
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206 views

Thermohaline current in North Atlantic

The thermohaline current in the North Atlantic ocean sinks because it gets cooled, or it gets cooled because of sinking?
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Ekman Transport

Is it not the Ekman Transport, or wind drag of the surface water, a violation of the Physical evidence of zero relative velocity at any boundary, in viscous flow?
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454 views

Depth of the wind-induced currents and the shoreline

In the open sea the speed of the current in the developed sea can be estimated as 3% the wind velocity at 10 meters. Why is ocean surface velocity around 3% of wind velocity? Is there a similar ...
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Light at the coast - is it different?

I have heard artists talk about the unique quality of light near the sea, and now I live near the coast I want to know if there's any truth in it. Does being near the ocean affect light inland? I'm ...
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1answer
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Live video feeds for submarine ROVs?

I know of two live video channels showing live feeds of rover dives: Okeanos Explorer for dives with the NOAA Ship Okeanos Explorer. Nautilus live for dives from the Nautilus, operated by the Ocean ...
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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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442 views

Difference in surface temperature between the Northwest Atlantic and Northeast Atlantic

Why is the surface waters in the Northwest Atlantic Ocean colder than the surface waters of the Northeast Atlantic Ocean?
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Is there a formula to calculate shoreline length or water position from ocean?

Assuming in the past the water of the oceans were lower does it also mean that the water was not where it is right now?
 If yes, then how do we calculate approximately where the water would have been ...
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533 views

How to calculate the kinetic energy spectra from ocean current timeseries?

How does one practically compute the kinetic energy spectra from a timeseries of u- and v- Cartesian components of ocean current velocity ($m s^{-1}$) obtained from an Acoustic Doppler Current ...
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731 views

What is that drain east of newfoundland

On Google Maps I just found a drain east of Newfoundland: More details at https://www.scribblemaps.com/maps/view/What_is_that/Jafix1 I wonder what that could be? I heard about issues from different ...
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Reasons for choosing LES in stead of RANS models?

In oceanography, is there any particular reason why choosing large eddy simulations in stead of RANS (regardless of the type of flow)? In both cases, 2d simulations would be used (shallow water model)....