METEOROLOGY – CLOUD & VIIBILITY CALCULATOR
Contrail Persistence
A precise tool.
What is the Contrail Persistence & How does it work?
The persistence of contrails is influenced by the relative humidity (RH) over ice, which determines how quickly water vapor condenses into visible clouds.
P = frac{1}{text{RH} + 0.5}
P = Persistence time in hours, RH = Relative humidity over ice (percentage)
A higher relative humidity over ice leads to faster contrail dissipation.
Parameters
Result
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Frequently Asked Questions
How does relative humidity affect contrail persistence?
Higher relative humidity over ice leads to faster dissipation of contrails.
What is the formula used for calculating contrail persistence?
The formula used is P = 1 / (RH + 0.5), where P is persistence time in hours and RH is relative humidity over ice in percentage.
Can you explain what contrail persistence means?
Contrail persistence refers to how long a contrail remains visible in the sky before it dissipates due to changes in atmospheric conditions.
What is the impact of temperature on contrail persistence?
Temperature affects relative humidity, which in turn impacts contrail persistence. Lower temperatures can lead to higher relative humidity over ice and thus longer-lasting contrails.
How does wind speed influence contrail persistence?
Wind speed can affect how quickly a contrail dissipates. Stronger winds may cause contrails to spread out and dissipate faster.
What is the role of atmospheric pressure in contrail formation?
Atmospheric pressure affects the conditions under which water vapor condenses into visible contrails, influencing their persistence.
Can you provide an example calculation for contrail persistence?
If RH is 30%, then P = 1 / (30 + 0.5) = 0.032 hours or approximately 1.92 minutes of persistence.
Results are for informational purposes only and do not constitute professional advice.