Sqs: Sqs

In NCAR/Ranadu: Functions for use with RAF aircraft data files

Sqs

Description

Calculate the quasi-steady supersaturation and characteristic relaxation time.

Usage

Sqs(W = 1, Nd, T = 5, p = 700)

Arguments

W	The updraft [m/s]
Nd	A data.frame containing the droplet size distribution with column names "n" and "r" for number concentration and radius. Units can be either SI or /cm^3 and micrometers.
T	The temperature in degrees Celsius.
p	The pressure is hPa.

Details

See the equations in Politovich and Cooper (1988) and Cooper (1989) [http://journals.ametsoc.org/doi/pdf/10.1175/1520-0469 [http://journals.ametsoc.org/doi/pdf/10.1175/1520-0469 Given the updraft, droplet size distribution, temperature and pressure, calculates the quasi-steady supersaturation and the associated time constant. Uses a condensation coefficient of 0.04 and an accommodation coefficient of 1.

Value

A two-component vector containing the quasi-steady supersaturation (in fractional units, not in

Author(s)

William Cooper

Examples

Sqs (W=2., Nd=data.frame(r=2:20, n=c(rep(0,5), rep(50,10), rep(0,4))), T=4.3, p=771)

NCAR/Ranadu documentation built on Jan. 27, 2023, 1:09 a.m.