Definition

Noun: An isohel is a line on a map that connects points receiving equal amounts of sunshine over a specified period, such as a day, month, or year. It is a type of isogram used in meteorology and climatology.

Usage

The word isohel is a technical term used primarily in scientific contexts, specifically in meteorology, geography, and climatology. It is used to describe and analyze the geographical distribution of solar radiation.

Examples

• The map featured an isohel indicating regions that received an average of eight hours of sunshine per day in July.
• By studying the isohels, climatologists can identify sunnier and cloudier regions of the country.
• The isohel for annual sunshine clearly showed the contrast between the coastal and inland areas.

Advanced Usage

• Cartographic Analysis: Isohels are analyzed alongside other isopleths (like isotherms for temperature or isohyets for rainfall) to understand climate patterns.
  • The correlation between the isohel and the isotherm maps was significant.

Variants and Related Words

• Isogram (n): A general term for any line on a map connecting points of equal value for a given phenomenon (e.g., isobar, isotherm, isohel).
• Isopleth (n): A line on a graph or map connecting points of equal value; often used synonymously with isogram in cartography.

Synonyms

• Sunshine isopleth
• Solar radiation contour

Related Concepts (Not Phrasal Verbs or Idioms)

• Solar Insolation: The amount of solar radiation reaching a given area.
• Sunshine Duration: The length of time that the sun is visible.

Noun

1. an isogram connecting points receiving equal amounts of sunshine