Ekman layer
E206891
The Ekman layer is the thin region of fluid near a boundary (such as the ocean surface or seafloor) where the balance between friction and the Coriolis effect causes the flow to spiral with depth.
All labels observed (5)
| Label | Occurrences |
|---|---|
| Ekman spiral | 4 |
| Ekman layer canonical | 3 |
| Ekman pumping | 2 |
| Ekman suction | 1 |
| surface Ekman layer | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T1840231 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: Ekman layer Context triple: [Ekman transport, occursIn, Ekman layer]
-
A.
Ekman transport
Ekman transport is an oceanographic process in which wind-driven surface waters move at an angle to the wind direction due to the Coriolis effect, causing net water transport perpendicular to the wind.
-
B.
Saffman
Saffman is a surname most notably associated with Philip G. Saffman, a prominent British-American applied mathematician and fluid dynamicist.
-
C.
Bjerknes compensation
Bjerknes compensation is a climate science concept describing how changes in ocean heat transport tend to be offset by opposite changes in atmospheric heat transport, helping stabilize the total poleward energy flux.
-
D.
Beaufort Gyre
The Beaufort Gyre is a large, wind-driven ocean circulation system in the Arctic Ocean that traps and stores vast amounts of sea ice and freshwater.
-
E.
Coriolis effect
The Coriolis effect is the apparent deflection of moving objects caused by Earth's rotation, strongly influencing global wind patterns and ocean currents.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: Ekman layer Target entity description: The Ekman layer is the thin region of fluid near a boundary (such as the ocean surface or seafloor) where the balance between friction and the Coriolis effect causes the flow to spiral with depth.
-
A.
Ekman transport
Ekman transport is an oceanographic process in which wind-driven surface waters move at an angle to the wind direction due to the Coriolis effect, causing net water transport perpendicular to the wind.
-
B.
Saffman
Saffman is a surname most notably associated with Philip G. Saffman, a prominent British-American applied mathematician and fluid dynamicist.
-
C.
Bjerknes compensation
Bjerknes compensation is a climate science concept describing how changes in ocean heat transport tend to be offset by opposite changes in atmospheric heat transport, helping stabilize the total poleward energy flux.
-
D.
Beaufort Gyre
The Beaufort Gyre is a large, wind-driven ocean circulation system in the Arctic Ocean that traps and stores vast amounts of sea ice and freshwater.
-
E.
Coriolis effect
The Coriolis effect is the apparent deflection of moving objects caused by Earth's rotation, strongly influencing global wind patterns and ocean currents.
- F. None of above. chosen
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
boundary layer
ⓘ
geophysical fluid dynamics concept ⓘ physical oceanography concept ⓘ |
| characterizedBy |
Coriolis deflection of moving fluid
ⓘ
dominant role of viscosity or turbulent friction ⓘ spiral turning of flow direction with depth ⓘ vertical shear of horizontal velocity ⓘ |
| dependsOn |
Coriolis parameter
ⓘ
kinematic viscosity or eddy viscosity ⓘ surface or bottom stress ⓘ |
| fieldOfStudy |
geophysical fluid dynamics
ⓘ
meteorology ⓘ oceanography ⓘ |
| flowDirection | rotates with depth relative to the direction of applied stress ⓘ |
| flowDirectionNorthernHemisphere | net transport 90 degrees to the right of wind stress ⓘ |
| flowDirectionSouthernHemisphere | net transport 90 degrees to the left of wind stress ⓘ |
| governingEquation | Ekman momentum equations ⓘ |
| hasCause | balance between friction and Coriolis force ⓘ |
| hasConsequence |
Ekman transport
ⓘ
coastal downwelling ⓘ coastal upwelling ⓘ generation of secondary circulations ⓘ net transport at an angle to the wind or stress direction ⓘ surface convergence and divergence ⓘ wind-driven vertical motions in the ocean ⓘ |
| hasPart |
Ekman layer
self-linksurface differs
ⓘ
surface form:
Ekman spiral
|
| hasProperty |
horizontal pressure gradient approximately balanced by Coriolis force outside the layer
ⓘ
steady-state balance between friction and Coriolis force ⓘ thin compared to total fluid depth ⓘ |
| hasType |
bottom Ekman layer
ⓘ
internal Ekman layer ⓘ Ekman layer self-linksurface differs ⓘ
surface form:
surface Ekman layer
|
| isRegion | near a boundary in a rotating fluid ⓘ |
| namedAfter | Vagn Walfrid Ekman ⓘ |
| occursIn |
atmosphere
ⓘ
oceans ⓘ rotating fluids ⓘ |
| relatedTo |
Ekman layer
self-linksurface differs
ⓘ
surface form:
Ekman pumping
Ekman suction ⓘ geostrophic flow ⓘ turbulent boundary layer ⓘ |
| typicalBoundary |
atmospheric surface layer
ⓘ
ocean surface ⓘ seafloor ⓘ |
| typicalThicknessFormula | proportional to square root of (2 times viscosity divided by absolute value of Coriolis parameter) ⓘ |
| usedIn |
models of atmospheric boundary layers
ⓘ
theory of wind-driven ocean circulation ⓘ |
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: Ekman layer Description of subject: The Ekman layer is the thin region of fluid near a boundary (such as the ocean surface or seafloor) where the balance between friction and the Coriolis effect causes the flow to spiral with depth.
Referenced by (11)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Ekman spiral
this entity surface form:
Ekman pumping
this entity surface form:
Ekman suction
this entity surface form:
Ekman spiral
this entity surface form:
Ekman spiral
this entity surface form:
Ekman spiral
this entity surface form:
surface Ekman layer
this entity surface form:
Ekman pumping