Eliassen–Palm theorem
E549980
The Eliassen–Palm theorem is a fundamental result in atmospheric dynamics that relates wave activity and mean-flow interaction, providing a framework for understanding how atmospheric waves transport momentum and energy.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Eliassen–Palm theorem canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T5854065 — 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: Eliassen–Palm theorem Context triple: [Arnt Eliassen, notableWork, Eliassen–Palm theorem]
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A.
Euler’s theorem
Euler’s theorem is a fundamental result in number theory stating that for any integer a coprime to n, a raised to the power of φ(n) is congruent to 1 modulo n.
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B.
de Bruijn–van Aardenne–Ehrenfest theorem
The de Bruijn–van Aardenne–Ehrenfest theorem is a fundamental result in combinatorics that characterizes the number of Eulerian circuits in directed graphs, particularly de Bruijn graphs, and underpins constructions in coding theory and discrete mathematics.
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C.
Milanković calendar
The Milanković calendar is a 20th-century reform of the Julian calendar, designed by Serbian scientist Milutin Milanković to more accurately align the civil year with the solar year and used by some Eastern Orthodox churches.
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D.
Lusser's law
Lusser's law is a reliability engineering principle that states the overall reliability of a system is the product of the reliabilities of its individual components, highlighting how system reliability decreases as more components are added in series.
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E.
Osthoff's law
Osthoff's law is a sound change in Indo-European linguistics describing the shortening of long vowels before resonant consonants followed by another consonant.
- 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: Eliassen–Palm theorem Target entity description: The Eliassen–Palm theorem is a fundamental result in atmospheric dynamics that relates wave activity and mean-flow interaction, providing a framework for understanding how atmospheric waves transport momentum and energy.
-
A.
Euler’s theorem
Euler’s theorem is a fundamental result in number theory stating that for any integer a coprime to n, a raised to the power of φ(n) is congruent to 1 modulo n.
-
B.
de Bruijn–van Aardenne–Ehrenfest theorem
The de Bruijn–van Aardenne–Ehrenfest theorem is a fundamental result in combinatorics that characterizes the number of Eulerian circuits in directed graphs, particularly de Bruijn graphs, and underpins constructions in coding theory and discrete mathematics.
-
C.
Milanković calendar
The Milanković calendar is a 20th-century reform of the Julian calendar, designed by Serbian scientist Milutin Milanković to more accurately align the civil year with the solar year and used by some Eastern Orthodox churches.
-
D.
Lusser's law
Lusser's law is a reliability engineering principle that states the overall reliability of a system is the product of the reliabilities of its individual components, highlighting how system reliability decreases as more components are added in series.
-
E.
Osthoff's law
Osthoff's law is a sound change in Indo-European linguistics describing the shortening of long vowels before resonant consonants followed by another consonant.
- F. None of above. chosen
Statements (40)
| Predicate | Object |
|---|---|
| instanceOf |
result in atmospheric dynamics
ⓘ
theorem ⓘ |
| appliesTo |
Rossby waves
NERFINISHED
ⓘ
large-scale atmospheric waves ⓘ planetary waves ⓘ quasi-geostrophic flow ⓘ zonal-mean flow ⓘ |
| associatedConcept |
Eliassen–Palm flux
NERFINISHED
ⓘ
pseudomomentum ⓘ quasi-geostrophic potential vorticity ⓘ transformed Eulerian mean formulation ⓘ wave activity ⓘ zonal-mean momentum equation ⓘ |
| assumes |
scale separation between waves and mean flow
ⓘ
small-amplitude waves ⓘ |
| context |
climate dynamics
ⓘ
general circulation of the atmosphere ⓘ middle atmosphere dynamics ⓘ |
| describes |
relationship between wave activity and mean flow
ⓘ
transport of energy by atmospheric waves ⓘ transport of momentum by atmospheric waves ⓘ transport of potential vorticity by waves ⓘ wave–mean flow interaction ⓘ |
| field |
atmospheric dynamics
ⓘ
geophysical fluid dynamics ⓘ meteorology ⓘ |
| implies |
conservation of wave activity in absence of dissipation and forcing
ⓘ
mean-flow acceleration where Eliassen–Palm flux converges ⓘ mean-flow deceleration where Eliassen–Palm flux diverges ⓘ |
| namedAfter |
Arnt Eliassen
NERFINISHED
ⓘ
Erik Palmén NERFINISHED ⓘ |
| provides |
diagnostic tool for wave activity fluxes
ⓘ
framework for understanding wave–mean flow interaction ⓘ |
| relates |
Eliassen–Palm flux to mean-flow acceleration
NERFINISHED
ⓘ
wave activity conservation to mean-flow changes ⓘ |
| usedFor |
analyzing sudden stratospheric warmings
ⓘ
diagnosing wave forcing of the zonal mean wind ⓘ studying atmospheric circulation response to waves ⓘ studying stratosphere–troposphere coupling ⓘ understanding midlatitude jet variability ⓘ |
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: Eliassen–Palm theorem Description of subject: The Eliassen–Palm theorem is a fundamental result in atmospheric dynamics that relates wave activity and mean-flow interaction, providing a framework for understanding how atmospheric waves transport momentum and energy.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.