Dinitrogen pentoxide, N2O5, is an important nighttime intermediate in the oxidation of NOx that is hydrolysed on surfaces. We conducted a field campaign in Fairbanks, Alaska during November 2009 to measure the gradient and derive a flux (and deposition velocity) of N2O5 depositing to snowpack using the aerodynamic gradient method. The deposition velocity of N2O5 under Arctic winter conditions was found to be 0.59 ± 0.47 cm s?1, which is the first measurement of this parameter to our knowledge. Based on the measured deposition velocity, we compared the chemical loss rate of N2O5 via snowpack deposition to the total steady state loss rate and found that deposition to snowpack is at least 1/8th of the total chemical removal of N2O5 that is located within the first few meters above the ground surface.
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机译：二氮氧化物，N 2 O 5，是在表面上水解的NOx氧化中的重要夜间中间体。我们在2009年11月在阿拉斯加的Fairbanks进行了一个野外活动，以测量使用空气动力学梯度法测量N2O5的N2O5沉积的渐变（和沉积速度）。发现北极冬季条件下N2O5的沉积速度为0.59±0.47cmS≤1，这是我们知识的第一次测量该参数。基于测量的沉积速度，我们将N2O5的化学损失率与总稳态损失率进行比较，发现沉积积雪至少是在第一个内部的N2O5的总化学除去的1/8在地面上方几米。
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