【摘要】：本文采用了內(nèi)蒙古地區(qū)2000年5月1日~5月4日的NCEP再分析資料風(fēng)場(chǎng)數(shù)據(jù),通過(guò)數(shù)值實(shí)驗(yàn)來(lái)模擬二維和三維沙塵輸送模型的沙塵輸送過(guò)程,并研究了二維輸送模型對(duì)初值和參數(shù)K_(ph)的敏感性,進(jìn)一步研究了三維輸送模型對(duì)參數(shù)K_(ph)和參數(shù)K_(pz)的敏感性.實(shí)驗(yàn)結(jié)果表明:(1)利用有限差分方法來(lái)數(shù)值求解二維沙塵輸送模型,模擬的結(jié)果符合實(shí)際的沙塵輸送過(guò)程.進(jìn)一步通過(guò)對(duì)初值和參數(shù)分別添加初值擾動(dòng)和參數(shù)擾動(dòng)實(shí)驗(yàn)得出,二維沙塵輸送模型對(duì)初值在一定范圍內(nèi)敏感性不強(qiáng),對(duì)參數(shù)K_(ph)在一定的小擾動(dòng)范圍內(nèi)非常敏感.(2)利用有限差分方法來(lái)數(shù)值求解三維沙塵輸送模型,分別研究了300m、700m和800m處不同時(shí)刻沙塵的發(fā)展變化,模擬的結(jié)果符合實(shí)際的沙塵輸送過(guò)程.進(jìn)一步通過(guò)對(duì)參數(shù)K_(ph)和參數(shù)K_(pz)分別添加參數(shù)擾動(dòng)實(shí)驗(yàn)得出,三維沙塵輸送模型對(duì)參數(shù)K_(ph)和參數(shù)K_(pz)在一定的小擾動(dòng)范圍內(nèi)很敏感.本文通過(guò)分析沙塵輸送模型對(duì)參數(shù)的敏感性,將數(shù)學(xué)與大氣科學(xué)緊密結(jié)合,對(duì)有關(guān)沙塵模式方面的研究具有理論方面的指導(dǎo)意義。
[Abstract]:In this paper, the wind field data of NCEP reanalysis data from May 1 to May 4, 2000 in Inner Mongolia region are used to simulate the dust transport process of two-dimensional and three-dimensional dust transport models through numerical experiments. The sensitivity of the two-dimensional transport model to the initial value and the parameter K _ (ph) is studied, and the sensitivity of the three-dimensional transport model to the parameter K _ (ph) and the parameter K _ (pz) is also studied. The experimental results show that: (1) the two-dimensional dust transport model is numerically solved by using the finite difference method, and the simulation results are in line with the actual sand dust transport process. Further, by adding initial value disturbance and parameter disturbance to the initial value and parameter, it is concluded that the two-dimensional sand dust transport model is not sensitive to the initial value in a certain range. K _ (ph) is very sensitive to the parameter K _ (ph) in a certain range of small disturbances. (2) using finite difference method to numerically solve the three-dimensional dust transport model, the development and variation of sand dust at different times at 300m ~ 700m and 800m are studied, respectively. The simulated results are in accordance with the actual sand and dust transport process. Furthermore, by adding parameter disturbance to parameter K _ (ph) and parameter K _ (pz), it is shown that the model of three-dimensional sand dust transport is sensitive to parameter K _ (ph) and parameter K _ (pz) in a certain range of small disturbances. By analyzing the sensitivity of the dust transport model to the parameters, this paper closely combines mathematics with atmospheric science, which is of theoretical significance to the study of sand dust model.
【學(xué)位授予單位】：河南大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類(lèi)號(hào)】：O241.8

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