影響地面臭氧濃度主要有三種貢獻來源，分別是光化反應、氣團傳輸和垂直對流所帶下的混和層以上臭氧；由過去的研究發現垂直對流所帶下來的夜間混和層以上臭氧對於日間臭氧濃度的影響超過50%，因此夜間高空如殘留有高臭氧濃度，將會對日間的光化反應有很大影響。本研究目的以實際採樣所得的資料來推估夜間混和層以上臭氧對日間地表臭氧濃度的貢獻量。在推估方面首先以採樣地表處監測車所測得當地臭氧的小時平均濃度來求取實際臭氧生成速率，再扣除地表排放所造成的光化反應和氣團傳輸所造成的影響，以推估夜間混和層以上臭氧經垂直對流所帶下來的貢獻量。
本研究藉由繫留汽球於高空所得臭氧的夜間濃度與日間地表最大小時臭氧濃度的比較，發現日間濃度確實有受到夜間混和層以上臭氧垂直對流的影響，且發現夜間高空與日間最大濃度間呈一個對數的關係，在800 m處與地表最大濃度的關係為y = 20.327ln(x) + 6.3125。將所求得之混合層以上臭氧濃度對日間的影響量與地表實際臭氧的生成量進行比較，發現貢獻比例約為10 ~ 30 %之間，且以早上時最大而越靠近中午影響程度越小。

The concentration of ozone near the surface are mainly effected from three source: Photochemical reaction, Transformation and Vertical convection from the upper boundary layer; in the pass, find the vertical convection from the noctural boundary layer effect daily ozone more than 50 %, therefore if noctural upper boundary layer residue highly ozone, it will have a large effect to daily photochemical reaction. The purpose of this study is use the sampling data to estimate the contribution of vertical convection from the noctural boundary layer to daily ozone near the surface. At first, use a ozone monitor on the sampling groung to measure the local concentration of ozone, and use the hourly average to estimate the true production rate of ozone, then take off the effect from the photochemical reaction and transformation to estimate the contribution from the vertical convection.
This study use the balloon to sample ozone from different height and use the sampling result to compare the max concentration hourly ozone, find that the daily ozone is truly effected from the vertical convection and will be display like a logarithm. At 800 m height，the relation is y=20.327ln(x)+6.3125. Finally, use the comtribution from the vertical convection to compare the truly production rate of ozone near the ground, find that the contribution rate is among 10 ~ 30 %, and max in the early morning.

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