NOy partitioning and budget and its correlation with N2O in the Arctic vortex and in summer midlatitudes in 1997
NOy partitioning and budget and its correlation with N2O in the Arctic vortex and in summer midlatitudes in 1997
复制标题
1997年北极涡旋和夏季中纬度地区NOy分配和收支及其与N2O的相关性
DOI：
10.1029/2001jd000916
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发表时间：
2002
影响因子：
--
通讯作者：
H. Fischer
中科院分区：
文献类型：
--
作者：
G. Wetzel;H. Oelhaf;R. Ruhnke;F. Friedl;A. Kleinert;W. Kouker;G. Maucher;T. Reddmann;M. Seefeldner;M. Stowasser;O. Trieschmann;T. Clarmann;H. Fischer
夜间总活性氮最重要种类的垂直分布（NOy = NO2 + HNO3 + CIONO2 + 2N2O5 + HO2NO2）及其源气体N2O的红外临边发射光谱反演，1997年3月24日从基律纳（瑞典，北纬68度）在冬末北极涡旋内，1997年7月2日从加普（法国，北纬44度）在夏季中纬度地区。测量的数据进行了比较与三维化学传输模式（CTM）卡尔斯鲁厄模拟模型的中层大气（KASIMA）进行的计算。结果表明，在晚冬北极低涡中，有效氮和有效氯分别以HNO3和CIONO2的形式存在。1997年3月观测到的异常N2 O-NO y相关似乎在很大程度上是由穿过涡旋边缘的空气质量的准水平混合引起的。然而，在20公里附近，可以观察到约1.5至2 ppbv NO y的反硝化作用。1997年7月测得的N2O廓线表明极涡空气的残余，CTM在同一地点没有再现。然而，轮廓形状的NO y家族的各个化合物，以及NOx/NO y的比例是相当好地再现的模型。
Vertical profiles of the most important species of nocturnal total reactive nitrogen (NO y = NO 2 + HNO 3 + CIONO 2 + 2 N 2 O 5 + HO 2 NO 2 ) together with its source gas N 2 O were retrieved from infrared limb emission spectra measured by the Michelson Interferometer for Passive Atmospheric Sounding, Balloon-borne version (MIPAS-B) instrument inside the late winter arctic vortex from Kiruna (Sweden, 68°N) on 24 March 1997 and in summer midlatitudes from Gap (France, 44°N) on 2 July 1997. The measured data were compared to calculations performed with the three-dimensional chemistry transport model (CTM) Karlsruhe Simulation model of the Middle Atmosphere (KASIMA). The results show that in the late winter arctic vortex most of the available nitrogen and chlorine is in the form of HNO 3 and CIONO 2 , respectively. An anomalous N 2 O-NO y correlation observed in March 1997 appears to be caused to a large extent by quasi-horizontal mixing of air masses across the vortex edge. However, near 20 km some denitrification of ∼1.5 to 2 ppbv NO y could be observed. The N 2 O profile measured in July 1997 indicates remnants of polar vortex air and is not reproduced by the CTM at the same location. However, the profile shapes of the individual compounds of the NO y family as well as the NO x /NO y ratio are reproduced fairly well by the model.