Haines Index
Haines Index (also known as Lower Atmosphere Severity Index) is a weather index developed by meteorologist Donald Haines in 1988 that measures the potential for dry, unstable air to contribute to the development of large or erratic wildland fires.[1] The index is derived from the stability (temperature difference between different levels of the atmosphere) and moisture content (dew point depression) of the lower atmosphere. These data may be acquired with a radiosonde or simulated by a numerical weather prediction model. The index is calculated over three ranges of atmospheric pressure: low elevation (950-850 millibars (mb)), mid elevation (850-700 mb), and high elevation (700-500 mb).[2]
A Haines Index of 6 means a high potential for an existing fire to become large or exhibit erratic fire behavior, 5 means medium potential, 4 means low potential, and anything less than 4 means very low potential.[3][4]
References
- ^ "Haines Index". USA Forest Service. Archived from the original on April 16, 2014. Retrieved 16 April 2014.
- ^ Noaa
- ^ Winkler, Julie A.; Potter, Brian E.; Wilhelm, Dwight F.; Shadbolt, Ryan P.; Piromsopa, Krerk; Bian, Xindi (2007). "Climatological and statistical characteristics of the Haines Index for North America". International Journal of Wildland Fire. 16 (2): 139–152. CiteSeerX 10.1.1.486.1768. doi:10.1071/WF06086.
- ^ Haines index definition
See also
- Forest fire weather index
- Wildfire modeling
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- Adiabatic processes
- Advection
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- Lightning
- Surface solar radiation
- Surface weather analysis
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- Convective condensation level (CCL)
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- Precipitation
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- Convective inhibition (CIN)
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- K Index
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- Lifted index (LI)
- Maximum parcel level (MPL)
- Bulk Richardson number (BRN)
- Dew point (Td)
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- Dry-bulb temperature
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- Forest fire weather index
- Haines Index
- Heat index
- Humidex
- Humidity
- Relative humidity (RH)
- Mixing ratio
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- Equivalent potential temperature (θe)
- Sea surface temperature (SST)
- Temperature anomaly
- Thermodynamic temperature
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- Virtual temperature
- Wet-bulb temperature
- Wet-bulb globe temperature
- Wet-bulb potential temperature
- Wind chill
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