Skip to main content

Questions tagged [oceanography]

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

Filter by
Sorted by
Tagged with
3 votes
1 answer
68 views

What sets the temperature of the deep ocean?

My question centers around the temperature of the deep ocean at depths of <7000m. I know a few things already. The temperature of the ocean rapidly declines up to 1000m in depth, before falling ...
user2944352's user avatar
1 vote
0 answers
12 views

What does the SST field represent in the GFS forecast/ analysis?

What does the SST field represent in the GFS forecast/ analysis? For example, in the ERA5 reanalysis product, the SST is a foundation SST taken from the OSTIA. Similarly, what is the SST in GFS? Is it ...
The Emerging Star's user avatar
1 vote
0 answers
16 views

Oxygen concentrations in the air and absorption rates at sea, even under windy conditions

If I measure the amount of oxygen in the air at sea, is it the same as if I measure it on land? What if there is wind? Does oxygen concentration, change, in the middle of wind? What about the ability ...
Joselin Jocklingson's user avatar
2 votes
0 answers
66 views

Absolute and potential vorticity conservation

The source processes for (vertical) vorticity in the baroclinic vorticity equation are the stretching, tilting and solenoidal terms. I understand that all of these terms go to zero in a barotropic ...
bog creature's user avatar
1 vote
0 answers
20 views

conserving mass while converting sigma levels to geopotential (z-levels)

I am using a sigma-level ocean model, so that I have dh (layer thicknesses), salinity and bathymetry (bottom depth) for some area (lon-lat box). Now, I would like to calculate the amount of salt at ...
msi_gerva's user avatar
  • 111
3 votes
0 answers
67 views

How can friction and Coriolis force balance each other out in the Ekman layer?

In most derivations of the Ekman spiral we begin by assuming a steady state in which only frictional (drag) and Coriolis forces are acting- and then we equate them to get the spiral. I have two issues ...
bog creature's user avatar
1 vote
0 answers
20 views

CMIP6 ts versus tos for Pontential Intensity calculation

As per the title, I am interested in computing the potential intensity (PI) and wondering what the difference between surface temperature (ts) over the ocean and sea surface temperature (tos) in CMIP6 ...
Giuniper's user avatar
0 votes
0 answers
10 views

Do I have the right conceptual understanding of the North Atlantic Current and its effect on climate?

I have worked with several mathematics equations related to climate change in a math course I have taken. However, I want to make sure that what I have gleaned from this math aligns with what is ...
AAAA's user avatar
  • 85
2 votes
1 answer
107 views

Where does snow falling at the polar ice caps originate?

Where did the water originally evaporate when snow falls at the polar and Greenland ice caps? I can think of two ideas: The water mostly evaporates from the nearest ice-free ocean because water ...
Peter A's user avatar
  • 563
1 vote
3 answers
107 views

Do tropical cyclones impact climate?

Do tropical cyclones (TCs) have a global impact on climate? Maybe in terms of their impact on air-sea heat or gas fluxes? For example cooling the surface ocean, or enhancing CO2 fluxes? The motivation ...
ouranos's user avatar
  • 652
7 votes
0 answers
98 views

Why does the wake of boats leave a long lasting print on the sea surface?

A picture is better than a long explanation. The boat is long gone but its wake is visible for a very long time and forms a pattern looking like a trail on the sea surface. The two lines are not even ...
Shaktyai's user avatar
  • 171
2 votes
0 answers
51 views

Examining thermohaline circulation first with just temperature differences

This is a set of differential equations originally produced by Stommel (1961) has been simplified in this source (https://serc.carleton.edu/integrate/teaching_materials/earth_modeling/...
AAAA's user avatar
  • 85
2 votes
1 answer
67 views

How to define sea areas

I want to define different study areas and want to do this here, for example, using the Nordic Seas. According to the definition, this area lies north of Iceland and south of Svalbard. However, are ...
Weiss's user avatar
  • 2,075
1 vote
0 answers
65 views

Why does weaker local gravity cause lower sea level?

The weaker local gravity in the Indian Ocean geoid low (IOGL) causes the sea level to be 106 m below the global mean sea level. Why is that ? "Because of this lower density, the gravitational ...
summerrain's user avatar
1 vote
0 answers
29 views

Which global scientific platforms exist to access ocean science-related data?

I am looking for a database where I can access 18O data from planktonic foraminifera, but so far, I have only come across the PANGAEA database. Since this site is primarily maintained by German ...
Weiss's user avatar
  • 2,075
2 votes
0 answers
44 views

Assuming no nearby animal/plant life or other 'artifical' influences, would a trapped pocket of air under 50-60 meters of seawater be breathable?

My guess as to the answer to my own question: Over a long period of time, no matter what the original composition of the air pocket was, it will exchange gases with the seawater just below it, which ...
Gonzalo's user avatar
  • 21
3 votes
2 answers
116 views

Are oceanic currents influenced by the Coriolis forces?

Hi If you look at the warm water currents in the N Atlantic, you can see how they have an overall eastward movement pattern: Source If you compare this with the Coriolis forces, which also turn in an ...
Weiss's user avatar
  • 2,075
4 votes
0 answers
233 views

Which currents are counted as AMOC in the North Atlantic and which are not?

This question is related to this question. I am currently trying to understand which currents in the North Atlantic are counted as part of the AMOC: I am sure about the currents: N. Atlantic current ...
Weiss's user avatar
  • 2,075
2 votes
1 answer
75 views

Questions about Stommel's Two-Box Model (North Atlantic Current)

I have a question about a module on Stommel's Two-Box model. I am uncertain about the following density equation: $ \Delta \rho = | R \Delta S - \Delta T| $ A larger difference between temperatures/...
AAAA's user avatar
  • 85
1 vote
0 answers
17 views

What are realistic salinity level ranges (in psu) and temperature ranges (in celsius) of the North Atlantic Ocean?

I am trying to make sense as to why salinity levels impact the density of ocean water more than temperature. This is in an attempt to understand the two-box model of ocean circulation. I know there ...
AAAA's user avatar
  • 85
1 vote
0 answers
24 views

Question regarding the breakup of India from Eastern Gondwana [closed]

I wanted to ask this question as it relates to a project I am working on. In this "timeline" when India broke away from Gondwana the Indian Plate took a small piece of land from Eastern ...
GoofyGoober05's user avatar
3 votes
0 answers
32 views

How to de-tide a daily averaged sea level data?

Coud you help me to resolve this situation? : I have a raw daily averaged sea level time series, as you know when we perform a harmonic analysis (e.g. using T_Tide from MATLAB) we need to put our data ...
Miguel 's user avatar
  • 395
1 vote
0 answers
15 views

How to change the whitecapping coefficient Cds in Delft-Wave

I have worked about the wave calibration in these days, and I met a problem that the significant wave height from Delft-WAVE is much lower than the observation data. I have searched for ways from the ...
TUOTUO's user avatar
  • 11
1 vote
0 answers
51 views

Water on our planet, where did it come from? [closed]

Water on our planet, where did it come from? A water molecule is created when two atoms of hydrogen combine with one atom of oxygen. W The volume of all water (on our planet) is about 332.5 million ...
farsideofourmoon's user avatar
3 votes
1 answer
124 views

What 18O indicators are there besides foraminifera?

It is now standard practice to use foraminifera to represent paleo 18O signatures from a marine system. However, there are some problems if you want to show 18O variations in the last 100 years using ...
Weiss's user avatar
  • 2,075
1 vote
0 answers
37 views

I want to build a new island country in the ocean. Where is the best place to build it? [closed]

It should be far enough away from land so that another country may not stake claim on the island, but in a shallow enough area such that dredging and depositing sand and other building materials is ...
Anand Sharma's user avatar
3 votes
1 answer
245 views

What do interannual, annual and intrannual and interseasonal, seasonal and intraseasonal mean in the context of Oceanography?

Currently I am studying the period of oceanographic phenomena such as El Niño, and I have seen the next concepts: interannual, annual and intrannual and interseasonal, seasonal and intraseasonal. I ...
Miguel 's user avatar
  • 395
3 votes
1 answer
83 views

A low-pass butterworth filter to analyze ocean bottom pressure

Hello fellow oceanographers, I just trying to design a fourth-order low-pass butterworth filter with a 15-days cutoff period, in python, with the aim to filter a ocean bottom pressure (OBP) time ...
Miguel 's user avatar
  • 395
3 votes
2 answers
669 views

If among oceanic crusts older means heavier, then why is old continental crust lighter than new oceanic crusts?

When we consider two oceanic crusts, the older oceanic crust is heavier and the newer oceanic crust is lighter. But when we consider two crusts, one continental and the other oceanic, continental ...
Koushik Sarkar's user avatar
3 votes
1 answer
251 views

Collapse of the AMOC - effects

What are the potential effects of an eventual collapse of the Atlantic meridional overturning circulation (AMOC)? I often see news viting everything ranging from droughts in India to increased climate ...
shamalaia's user avatar
  • 529
2 votes
1 answer
47 views

How to model the travel time of tsunami waves generated by volcanic explosion?

I am trying to understand how can I model the travel time of tsunami waves generated by volcanic explosions? I want to analyze the 2022 Tonga tsunami. I have been using the UNESCO CoMIT software with ...
Miguel 's user avatar
  • 395
5 votes
1 answer
355 views

Will the hot Atlantic shape global/local weather and if so, how?

So the Atlantic Ocean exhibits record-breaking temperatures currently with about 1 degree Celsius above-average mean surface temperatures. This article, for example, mentions that a more severe ...
hschoell's user avatar
  • 390
1 vote
1 answer
129 views

Wind speed at the surface of the ocean

Why is wind speed generally considered at 10m above the sea surface? Is there any specific reason for this? For example, if we say wind speed is 8 m/s which implies that wind speed at a height of 10 m ...
M.Shanmuga sundari's user avatar
1 vote
1 answer
61 views

Swell spectrum and wind spectrum

While modelling both wind waves and swell waves, whether we have to add both spectra or append wind spectra in swell spectra? Because swell spectra has high amplitude values but wind spectra has very ...
M.Shanmuga sundari's user avatar
6 votes
1 answer
251 views

Why is sealevel higher where gravity is higher?

The EGM96 geoid map depicts hypothetical sealevel due to gravitational variations on the Earth's surface: image source It places one of the highest areas in the northern part of the Atlantic ocean. ...
Jason C's user avatar
  • 160
2 votes
1 answer
42 views

How to download atmospheric/oceanographic data for a given region in the sea?

I am trying to get data of atmospheric temperature, wind intensity and/or atmospheric pressure for a specific region of the sea, since I have ocean bottom pressure data from a fixed instrument (lat,...
Miguel 's user avatar
  • 395
3 votes
1 answer
96 views

Density of sea water on the side of currents

A geostrophic current in the northern hemisphere features a pressure gradient force directed towards the left of the current (west if the current heads straight north) and Coriolis force directed to ...
Redirectk's user avatar
  • 272
5 votes
1 answer
126 views

How to remove the ENSO signal on ocean bottom pressure data?

I am trying to remove the possible effect of El Niño-Southern Oscillation (ENSO) phenomenon on sea bottom pressure records (sensor 4, 5 & 7, see map) that are located in front of the Pacific coast ...
Miguel 's user avatar
  • 395
4 votes
0 answers
54 views

Using radar to measure ocean waves along the shoreline

What radar technology would be best to measure the attributes of ocean waves near (under 2k distance) the shoreline?
Beach Bum's user avatar
  • 141
1 vote
0 answers
41 views

Is the southern downwelling situation in the AMOC as affected by climate change as the two northern downwelling situations?

I wonder if the southern downwelling situation in the AMOC is affected by climate change as much as the two northern situations. I come to the question because I find the Cicrumantarctic circulation ...
Weiss's user avatar
  • 2,075
2 votes
0 answers
64 views

Sea waves with perpendicular discontinuity

This is a sea/ocean wave image which can be found in several places on the internet. I cannot find its origin and any image search did not yield conclusive results. It may even be a render. Question: ...
scriptfoo's user avatar
  • 129
1 vote
0 answers
32 views

IPCC 6 - What's the background of possible marine species loss?

The Figure "Projected risks and impacts of climate change on natural and human systems at different global warming levels" has this to say on species loss (only part of the image): I can't ...
mart's user avatar
  • 1,244
4 votes
0 answers
47 views

How saline were the earth's oceans during the Last Glacial Maximum?

According to Wikipedia sea water is 34.7 parts per thousand salt. Between evaporation and precipitation it seems like this amount is kept largely in equilibrium but, during the last glacial maximum, a ...
neubert's user avatar
  • 545
4 votes
1 answer
153 views

Dedicated book to understand climate and ocean science

Let me explain: I am a physics student who did some basic earth science during my early high school days. But thinking about earth science makes me very curious about deeper topics, like how the ...
आर्यभट्ट's user avatar
5 votes
1 answer
120 views

How does the Coriolis effect explain Ekman transport?

Before answering the question, keep in mind that I am a second year Biology student, with no experience in studying Physics and a very basic understanding of Mathematics. Thus, I would prefer a ...
Growing6884's user avatar
5 votes
0 answers
86 views

Ocean oscillations with long time periods

I heard that some ocean oscillations act on a time scale of a millennium. Is this true, or at least argued by some oceanographers? If so, what are they and what causes them? If not, what are the ...
Peter A's user avatar
  • 563
12 votes
2 answers
693 views

Most amenable coastal geographic conditions for harbors?

I've been trying to find sources detailing the natural geographic features most suitable for shipping harbors along a coast—primarily for international trade. So far, I've read vague reference to ...
honeymoow's user avatar
  • 123
4 votes
1 answer
69 views

Does Arctic sea ice form a continuous flat sheet in winter between Russia and Canada, or are there gaps of water?

In the footage of Arctic sea ice in the spring or summer you can see gaps of water, lines of water between ice sheets, or kind of lakes of water mixed with icebergs. Even as far north as the North ...
SkyParticle's user avatar
3 votes
0 answers
79 views

Geostrophic adjustment with shallow water equations

The linearized f-plane shallow water equations are: $du'/dt - fv' = -g(d eta'/dx)$ dv'/dt + fu' = -g(d eta'/dy) (d eta'/dt) + H((du'/dx)+(dv'/dy)) = 0 where g is ...
Maggie Bradley's user avatar
1 vote
0 answers
31 views

Earthquake clustering by pairs algorithm questions

A program I'm writing does the following: (EQ=earthquake, EV=event, ML=machinelearning, etc) from a time series (in a selected station) it picks pairs of EQ' EVs with similar characteristics (...
ogeid's user avatar
  • 111

1
2 3 4 5
9