Rossby number
E621609
The Rossby number is a dimensionless quantity in fluid dynamics and meteorology that compares inertial to Coriolis forces, indicating the importance of Earth's rotation in large-scale atmospheric and oceanic flows.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Rossby number canonical | 2 |
| Rossby number is small | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T6825900 — 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: Rossby number Context triple: [Coriolis effect, relatedConcept, Rossby number]
-
A.
Rossby waves
Rossby waves are large-scale atmospheric and oceanic waves driven by Earth's rotation and the variation of the Coriolis effect with latitude, playing a key role in shaping global weather and climate patterns.
-
B.
Chandrasekhar number
The Chandrasekhar number is a dimensionless quantity in magnetohydrodynamics that measures the relative importance of magnetic forces compared to viscous forces in a conducting fluid.
-
C.
Reynolds number
The Reynolds number is a dimensionless quantity in fluid mechanics that characterizes the flow regime of a fluid, indicating whether it is laminar or turbulent based on the ratio of inertial to viscous forces.
-
D.
Froude number
The Froude number is a dimensionless quantity in fluid dynamics that compares inertial forces to gravitational forces, commonly used to characterize flow regimes in open channels and around ships.
-
E.
Eady–Eliassen model
The Eady–Eliassen model is a foundational theoretical framework in atmospheric dynamics used to analyze baroclinic instability and the development of midlatitude weather systems.
- 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: Rossby number Target entity description: The Rossby number is a dimensionless quantity in fluid dynamics and meteorology that compares inertial to Coriolis forces, indicating the importance of Earth's rotation in large-scale atmospheric and oceanic flows.
-
A.
Rossby waves
Rossby waves are large-scale atmospheric and oceanic waves driven by Earth's rotation and the variation of the Coriolis effect with latitude, playing a key role in shaping global weather and climate patterns.
-
B.
Chandrasekhar number
The Chandrasekhar number is a dimensionless quantity in magnetohydrodynamics that measures the relative importance of magnetic forces compared to viscous forces in a conducting fluid.
-
C.
Reynolds number
The Reynolds number is a dimensionless quantity in fluid mechanics that characterizes the flow regime of a fluid, indicating whether it is laminar or turbulent based on the ratio of inertial to viscous forces.
-
D.
Froude number
The Froude number is a dimensionless quantity in fluid dynamics that compares inertial forces to gravitational forces, commonly used to characterize flow regimes in open channels and around ships.
-
E.
Eady–Eliassen model
The Eady–Eliassen model is a foundational theoretical framework in atmospheric dynamics used to analyze baroclinic instability and the development of midlatitude weather systems.
- F. None of above. chosen
Statements (49)
| Predicate | Object |
|---|---|
| instanceOf |
dimensionless quantity
ⓘ
nondimensional number ⓘ physical quantity ⓘ |
| appliesTo |
geostrophic flows
ⓘ
large-scale atmospheric flows ⓘ large-scale oceanic flows ⓘ planetary-scale circulation ⓘ synoptic-scale weather systems ⓘ turbulent flows on a rotating planet ⓘ |
| category |
atmospheric dynamics concepts
ⓘ
dimensionless numbers of fluid mechanics ⓘ |
| CoriolisParameterDefinition | f = 2 Ω sin(φ) ⓘ |
| dependsOn |
latitude φ
ⓘ
planetary rotation rate Ω ⓘ |
| describes | relative importance of inertial forces to Coriolis forces ⓘ |
| dimensionless | true ⓘ |
| field |
fluid dynamics
ⓘ
geophysical fluid dynamics ⓘ meteorology ⓘ oceanography ⓘ |
| hasParameter |
Coriolis parameter f
ⓘ
characteristic length scale L ⓘ characteristic velocity U ⓘ |
| indicates | importance of planetary rotation in a flow ⓘ |
| interpretation |
Ro ≈ 1 implies comparable inertial and Coriolis effects
ⓘ
Ro ≪ 1 implies strong rotational control and near-geostrophic flow ⓘ Ro ≫ 1 implies rotation is dynamically unimportant ⓘ |
| namedAfter | Carl-Gustaf Rossby ⓘ |
| relatedTo |
Burger number
ⓘ
Coriolis force ⓘ Ekman number ⓘ Froude number ⓘ Reynolds number ⓘ Rossby waves ⓘ geostrophic balance ⓘ inertial force ⓘ |
| scaleAssociation | large Rossby number corresponds to small horizontal scales ⓘ |
| scaleAssociation | small Rossby number corresponds to large horizontal scales ⓘ |
| symbol | Ro ⓘ |
| typicalFormula | Ro = U / (f L) ⓘ |
| typicalValueRange | from much less than 1 to much greater than 1 depending on scale ⓘ |
| usedIn |
atmospheric dynamics
ⓘ
climate modeling ⓘ ocean circulation modeling ⓘ rotating tank experiments ⓘ weather forecasting ⓘ |
| usedToAssess |
importance of Coriolis terms in momentum equations
ⓘ
validity of geostrophic approximation ⓘ |
| usedToClassify | flow regimes in rotating fluids ⓘ |
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: Rossby number Description of subject: The Rossby number is a dimensionless quantity in fluid dynamics and meteorology that compares inertial to Coriolis forces, indicating the importance of Earth's rotation in large-scale atmospheric and oceanic flows.
Referenced by (3)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: Rossby number