Bayesian upscaling of aircraft ice measurements to two-dimensional domains for large-scale applications
Bayesian upscaling of aircraft ice measurements to two-dimensional domains for large-scale applications
复制标题
将飞机冰测量的贝叶斯升级到二维域以进行大规模应用
DOI：
10.1007/s00703-013-0303-3
复制
发表时间：
2013
影响因子：
2
通讯作者：
A. Heymsfield
中科院分区：
文献类型：
--
作者：
A. R. Jameson;A. Heymsfield
摘要
Abstract
What is new in this manuscript is a method of using aircraft observations from a long horizontal path through an ice cloud to produce properly correlated 2D fields of particle counts consistent with the observations, including all null values, at several different sizes for use in algorithm development and in scientific studies. A Bayesian approach is used to define the distributions of average counts, P(C), at every size. These are, in turn, used to expand the number of values at each particle size by a factor of 50. These data, then fill a square 2D grid of 20 × 20 km at 100-m resolution. At each grid point, the number concentrations corresponding to each particle size define the particle size distributions (PSD). A method for assuring the proper correlation of counts at each size over the entire grid is devised and discussed. These PSD can then be integrated to yield a number of different quantities over the entire grid such as radar reflectivities and ice water contents. From this perspective, one can then consider the set of observations as just one realization from a much larger ensemble of possible realizations by giving fuller expression to all of the information contained within the observed correlation functions and P(C)s. The in situ observations, however, remain crucial since this method does not ‘make-up’ new meteorology but simply gives wider expression to the meteorology contained within the observations.