本文選題：Mie散射激光雷達(dá) + 大氣消光系數(shù)�。� 參考：《中國(guó)環(huán)境科學(xué)》2017年05期

【摘要】：基于成都市2013年6月至2014年2月Mie散射激光雷達(dá)探測(cè)數(shù)據(jù)的分析表明,混合層頂附近大氣消光系數(shù)自下而上均存在顯著下降區(qū)、整體緩變區(qū)以及二者之間的過渡區(qū).利用logistic曲線對(duì)上述變化特征進(jìn)行擬合,通過計(jì)算該曲線曲率最大值對(duì)應(yīng)的高度,據(jù)此提出識(shí)別混合層高度的新方法.該方法的設(shè)計(jì)思想符合混合層的定義,即為湍流特征不連續(xù)界面以下湍流充分發(fā)展的氣層;另外,相應(yīng)的計(jì)算結(jié)果不僅和探空曲線得到的混合層高度總體一致,也與地面細(xì)顆粒物濃度的變化特征保持高度的相關(guān).
[Abstract]:Based on the analysis of Mie scattering lidar data from June 2013 to February 2014 in Chengdu, it is shown that the atmospheric extinction coefficient near the top of the mixed layer has a significant descending region from bottom to top, a whole slowly changing region and a transition region between them. The logistic curve is used to fit the above characteristics, and the height corresponding to the maximum curvature of the curve is calculated, and a new method to identify the height of the mixed layer is proposed. The design idea of the method accords with the definition of mixed layer, that is, the gas layer with fully developed turbulence below the turbulent characteristic discontinuous interface, and the corresponding calculation results are not only consistent with the height of the mixed layer obtained by the sounding curve. It also has a high correlation with the change of ground fine particle concentration.
【作者單位】： 成都信息工程大學(xué)大氣科學(xué)學(xué)院;高原大氣與環(huán)境四川省重點(diǎn)實(shí)驗(yàn)室;成都市環(huán)境監(jiān)測(cè)中心站;
【基金】：國(guó)家自然科學(xué)基金重大研究計(jì)劃(9164420061)
【分類號(hào)】：X51;X87

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