Stack Exchange Network

Stack Exchange network consists of 175 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.

Visit Stack Exchange

Questions tagged [oceanography]

The tag has no usage guidance.

0
votes
0answers
9 views

Visually comparing variances

I have a dataset containing 8 categories, I now want to visually compare the variance between the categories. The most common approach would be to use box plots or violin plots but I would like to ...
1
vote
0answers
32 views

Alternative forms of metacentric height based stability condition

For a floating body is stable condition Archimedes principle of buoyancy will be obeyed. where $M_{b}$ and $M_{w}$ are mass of the total body and mass of the emerged water. $$M_{b}=M_{w}$$ Tilting it ...
1
vote
1answer
42 views

How do you calculate the rate of ascent for frozen seawater in seawater?

Assuming 1m3 sphere of seawater were flash frozen at a depth of 1km, how rapidly would it start ascending to the surface given the buoyancy? Assuming we could ignore bonds between the surface of ...
0
votes
3answers
41 views

High pressures under ocean surface

I read a book about deep water exploring in mariana's trench. They of course talked a lot about pressure, and so this question came to my mind: If you're, say, 2km down in the Mariana's Trench there ...
1
vote
1answer
111 views

Ocean wave periodicity

Sitting at the beach, I observe waves crashing onto the shore with some periodicity (although not quite mono-periodic). Since wind is the source of ocean waves (not considering tides), how can we ...
0
votes
0answers
91 views

Does water height in mixed semidiurnal tide systems change in a sinusoidal pattern between peaks?

I'm writing a bit of plotting software that takes the time of high tides and low tides and interpolated what the height should be between these times. I know that diurnal tidal systems follow a ...
2
votes
2answers
63 views

Can bubbles lower water pressure?

After watching a TV show I saw that bubbles originating from underwater can lower the impact damage when something hit it at velocity. I was wondering if another implementation of this would work. ...
0
votes
3answers
122 views

What happens when one sticks their foot out of a diving bell at crush depth?

I've been reading a lot about lost World War II submarines, and in the book I'm reading, they discuss the use of a diving bell to go down 5 miles to the ocean floor. I have a couple questions about ...
0
votes
0answers
36 views

Effect of aeration on Celerity

Suppose a ocean wave encountered a section of ocean which had a higher level of aeration from gas such as methane escaping from the seafloor. Due to the aerated sections apparent lower density would ...
1
vote
0answers
60 views

The physics/math behind rogue waves [closed]

I'm a little confused as to why rogue waves are so unpredictable and large. Are they just the chance combinations of many waves or is there a physical and mathematical reasoning as to how they exist? ...
2
votes
1answer
71 views

How does melting ice change the mass of the ocean?

In the paper, Ocean Bottom Deformation Due To Present-Day Mass Redistribution and Its Impact on Sea Level Observations, the authors state that: Due to changes in the land ice mass balance and land ...
11
votes
3answers
4k views

What happens to the energy in an ocean wave after it breaks on a reef or the shore?

I understand that the conservation of energy essentially says that "energy can neither be destroyed or created but that it is transferred from one form to another." Given that, on the ocean, wind ...
4
votes
1answer
57 views

Why and how are wave sets (groups) created?

At a coasts wave normally arrive in groups (sets) and we wondered why this is the case. Some internet research did reveal some clues but no convincing answer. I want to know why waves gather in ...
2
votes
1answer
46 views

Which way will the Sphere rotate? [closed]

Let's say we have a sphere, with an "inner boarder" splitting it into 4 equal parts. We extract the air from the 3/4 parts (leaving them completely empty) and we fill just 1/4 part with air. We then ...
1
vote
2answers
218 views

Physics and depth control of a small spherical submarine

Recently, me and my dad were discussing the theoretical design of a small homemade submarine. Lets assume that it is a hollow acrylic sphere with a radius of around 25cm. The radius would likely need ...
2
votes
1answer
62 views

Swell Spectral Transform

For understanding the quality of surf in general, I find that directional spectral plots, like this also below, are the best way for me to get a quick mental picture. I want to make a kind of video of ...
0
votes
1answer
213 views

Convert units of Empirical Orthogonal Function (EOF) for sea surface temperature data

I have a dataset of daily averaged sea surface temperatures for an entire year. I wish to use an empirical orthogonal function to find the dominant patterns within the data. Consider that my ...
1
vote
1answer
132 views

Righting moment for object submerged in water

I am looking to determine the lateral angle at which an underwater camera system will no longer right itself. When on the ocean floor it is $-24.30~\text{kg}$ buoyant with the difference between its ...
52
votes
2answers
4k views

Why does sound absorption in oceans depend on the pH?

I was reading "The Sixth Extinction: An Unnatural History", by Elizabeth Kolbert, and there she comments that high level of $CO_{2}$ in the atmosphere lowers the pH of oceans (which makes sense) and, ...
47
votes
4answers
9k views

Why do some location on Earth have only one tidal maximum per day instead of two?

Most places in the ocean have two high tides and two low tides per "day" (~25 hours). But I remember reading that some locations only have one of each per day. This answer has some great explanations ...
2
votes
1answer
99 views

D2O distribution in water [duplicate]

I just learned that about 1/1000 of hydrogen is deuterium. Does that mean 1/1000 of water is D2O, which is heavier and sinks to the bottom in a glass of water? And consequently is there a layer of D2O ...
2
votes
0answers
58 views

Great Pacific Garbage Patch Equilibrium Points

I originally posted this question on earth science stack, but the question wasn't getting many views. I was watching the science channel yesterday and the program mentioned the Great Pacific Garbage ...
2
votes
0answers
114 views

How efficient is the forward transfer of energy in gravity (surface) waves?

Ocean waves (properly categorized as gravity waves since gravity provides the restoring force within the medium they travel) propagate the major part of the energy derived from winds along the air-...
0
votes
1answer
598 views

Crushing pressure (15,750 psi) at the bottom of Marinas Trench [closed]

If a human would be crushed if he were to scuba dive to the bottom of Marinas Trench then how do fish survive down there without being crushed?
0
votes
1answer
33 views

estimate air temperature changes from changes in sea surface temperature

Consider a body of water, where the change in temperature for a given time period can be estimated by: $$ \frac{dTw}{dt} = \frac{Q_{net} \times A}{\rho \times C_{pw} \times V}$$ where $dt$ is the ...
1
vote
2answers
479 views

What is “Barotropic tidal forcing”?

I have been searching for a simple explanation for "Barotropic tidal forcing". Can anyone provide an definition or explain what it is?
1
vote
1answer
3k views

Converting Langley to Watts

I'm reading a really old paper which looks at estimating the surface energy fluxes for The Great Lakes. They show all of their values as Langleys per day. Can this be converted to Watts per meter ...
3
votes
1answer
56 views

Ocean surface mean current flow meaning

I tried to simulate the trajectory of an drifting object in the oceans by using the data of the OSCAR project http://www.oscar.noaa.gov/. The dataset actually used consist of grid sampled mean 2d ...
1
vote
0answers
47 views

Given temp and conductivity can I back-calculate to resistance, in order to plug in a new temp value and calculate a more accurate conductivity?

Background: I used a small CTD (conductivity, temperature, depth) recorder to log a series of dive profiles in a mixed coastal estuary. The recorder logged observed temperature and conductivity every ...
0
votes
1answer
40 views

Why doesn't linear wave theory produce phase velocities that agree with each other?

I'm not sure I understand the dispersion relationship for water waves. According to Wikipedia, the wavelength of ocean wave at arbitrary depth is given by: \begin{equation} \left(\frac{2\pi}{T}\right)...
1
vote
1answer
51 views

Ostwald gas solubility for air-sea gas exchange of O2

The bubble-mediated component of the air-sea gas exchange can be parameterized with Woolf's (1997) formula as: $$ K_{b} = W \frac{2450}{\beta_{0} \left( 1 + \frac{1}{\left( 14\beta_{0}Sc^{-0.5}\right)...
2
votes
1answer
202 views

Why is colder seawater more compressible?

I know compressibility is related to the pressure and temperature of the water parcel... but what is the physical/molecular reason why colder water is more compressible?
1
vote
1answer
29 views

the energy relations in oceanography description

I'm reading the following paper and do not entirely understand a point that the author is trying to make. In page 99 (2 of article) the author refers to the following equation: $$ Q^{*} = \beta S^{*}...
1
vote
1answer
57 views

integration for upper ocean mixed layer equation

I am trying to work through the following paper specifically trying to get from equation (1) to equation (6). Equation 1 states that $$ Q = \beta S e^{-\beta z} + 2B \delta(z) $$ where $\delta z$ ...
2
votes
2answers
3k views

Light penetration in the ocean

Is there an equation that describes the percentage of solar energy per wavelength that penetrates the ocean surface? For example, this website states that only 44.5% of the surface light reaches a ...
9
votes
1answer
12k views

Does water turn solid under deep ocean because of high pressure?

I know that we can make water solid with high pressure, so I think water will be solid in the deep ocean? If that is true, the depth of the ocean would be limited because water will become ice? ...
2
votes
0answers
124 views

What is the longest distance over which echolocation is effective?

Some animals, most notably bats, use echolocation in order to navigate and detect the location and size of objects and prey. This usually takes place over short distances. What are the theoretical ...
5
votes
2answers
2k views

what determines the wavelength of waves on the open ocean?

Looking at the picture below, you can totally see that these are tiny boats. The water is practically washing over the hull of these boat models. But the water has boundaries that are very far away,...
3
votes
1answer
109 views

How far can diffused undersea light travel and still be perceived by the human eye?

Example: If one SCUBA diver looks past another SCUBA diver horizontally into negative space, how far away is the most distant emission of 'blue' light waves? Consider the sight angle in question to ...
2
votes
0answers
72 views

Realistic Ocean Shears

I was wondering if anyone could point me to published data on the vertical structure of strong ocean currents, such as the Gulf Stream. I am primarily interested in the mean current profile as a ...
7
votes
2answers
2k views

Deuterium density in seawater

I heard today that deuterium for nuclear fusion could be extracted from the Oceans, in which it is present in "heavy water." I heard this claim: "Deuterium is distributed uniformly with Ocean depth....
1
vote
1answer
111 views

vertical wind gradients in the atmospheric boundary layer

I'm reading the following paper: Intercomparison of Bulk Aerodynamic Algorithms for the Computation of Sea Surface Fluxes Using TOGA COARE and TAO Data and am having trouble working through some ...
4
votes
2answers
135 views

How does the correlation length of weather emerge?

The question is pretty simple: If I know the weather where I stand, I can estimate the weather 5 meters or 1 km away away pretty well, but I'll have a hard time guessing what the weather is, say, 50 ...
4
votes
1answer
173 views

Ratio of horizontal to vertical kinetic energy in ocean

What is the ratio between horizontal and vertical kinetic energy in the ocean and what is the scale dependencies of this ratio ?
5
votes
3answers
1k views

Why do sea levels not rise uniformly around the world?

While reading the article Hawaii’s Beaches Are in Retreat, and Its Way of Life May Follow on The New York Times's website, I was surprised to find out that sea levels do not rise around the world at a ...