parcel_model.aerosol.dist_to_conc¶
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parcel_model.aerosol.
dist_to_conc
(dist, r_min, r_max, rule='trapezoid')¶ Converts a swath of a size distribution function to an actual number concentration.
Aerosol size distributions are typically reported by normalizing the number density by the size of the aerosol. However, it’s sometimes more convenient to simply have a histogram of representing several aerosol size ranges (bins) and the actual number concentration one should expect in those bins. To accomplish this, one only needs to integrate the size distribution function over the range spanned by the bin.
Parameters: dist : object implementing a
pdf()
methodthe representation of the size distribution
r_min, r_max : float
the lower and upper bounds of the size bin, in the native units of
dist
rule : {‘trapezoid’, ‘simpson’, ‘other’} (default=’trapezoid’)
rule used to integrate the size distribution
Returns: float
The number concentration of aerosol particles the given bin.
Examples
>>> dist = Lognorm(mu=0.015, sigma=1.6, N=850.0) >>> r_min, r_max = 0.00326456461236 0.00335634401598 >>> dist_to_conc(dist, r_min, r_max) 0.114256210943