CAJ | 학술논문

本文阐明随机变量是大气资料同化的根本概念。其根本性可以体现在两个方面：（1）原理上，大气资料同化的科学实质是建立在随机变量这个概念上。由于将资料同化的可用信息视为随机变量的数据，所以概率论与数理统计学成为资料同化的数学基础，使得资料同化有了基于估计理论的最优标准及其数学形式，成为一门科学。（2）实施上，基于随机变量这个概念下的数据是理解大气资料同化发展史的钥匙。由于资料同化的具体实施表现为各种同化方法中可用信息的资料融合，将资料同化的可用信息视为随机变量的数据，可以清晰地揭示主流同化方法的发展进程对应着其可用信息在内涵和种类上的不断扩展，这个扩展具体地体现了同化发展史的一个循序渐进的内在发展逻辑。
본문천명수궤변량시대기자료동화적근본개념。기근본성가이체현재량개방면：（1）원리상，대기자료동화적과학실질시건립재수궤변량저개개념상。유우장자료동화적가용신식시위수궤변량적수거，소이개솔론여수리통계학성위자료동화적수학기출，사득자료동화유료기우고계이론적최우표준급기수학형식，성위일문과학。（2）실시상，기우수궤변량저개개념하적수거시리해대기자료동화발전사적약시。유우자료동화적구체실시표현위각충동화방법중가용신식적자료융합，장자료동화적가용신식시위수궤변량적수거，가이청석지게시주류동화방법적발전진정대응착기가용신식재내함화충류상적불단확전，저개확전구체지체현료동화발전사적일개순서점진적내재발전라집。
What is it that makes atmospheric data assimilation come to be a discipline with its own theoreti-cally mathematical foundation and formalism?In this article it is highlighted that the random variable is the fundamental concept of atmospheric data assimilation.This lies in two aspects.First,probability theory and mathematical statistics,which are oriented to random variables,can be used as the mathematical foun-dation of atmospheric data assimilation,and thus atmospheric data assimilation is equipped with its mathe-matical formalism which is derived from its criterion for an optimal estimate on the basis of estimation the-ory.So in this sense the essence of science for atmospheric data assimilation is built on the concept of ran-dom variable.Second,data under the concept of random variable can find a way to understand the clear step-by-step expansion of useful information contents used during the historical progress of atmospheric data assimilation,which helps to know a simple cognitional intrinsic logic of development of atmospheric data assimilation.