Seasonality of Peroxyacetyl nitrate (PAN) in the upper troposphere and lower stratosphere using the MIPAS-E instrument
Seasonality of Peroxyacetyl nitrate (PAN) in the upper troposphere and lower stratosphere using the MIPAS-E instrument
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DOI：
10.5194/acp-10-6117-2010
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发表时间：
2009-10
影响因子：
6.3
通讯作者：
D. Moore;J. Remedios
中科院分区：
文献类型：
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作者：
D. Moore;J. Remedios
抽象。ENVISAT卫星上的迈克尔逊被动大气探测干涉仪（MIPAS-E）提供了探测和光谱解析影响大气化学的许多大气次要成分的机会。在本文中，我们检索全球，季节性PAN体积混合比（vmr）的数据MIPAS-E测量在2003年1月，3月，8月和10月，目前的结果，从这个计划之间的约300和150百帕。一个单一的PAN检索的总误差是优于20%以外的热带地区和优于50%的热带地区，其中水汽的不确定性占主导地位的总误差预算。我们在数据中观察到PAN季节性周期的明显差异，与生物质燃烧区域和生长季节密切相关。8月观测到北方半球中纬度最高的PAN vmrs（平均300-600 pptv），而1月和10月的数据（平均不到250 pptv）。在2003年3月的数据中，我们观察到最高的PAN vmrs在热带地区的vmrs在600和1000 pptv之间的东亚和中太平洋在333 hPa的证据。PAN的垂直分布作为纬度的函数（即纬向平均值）突出了PAN在对流层上部和平流层下部（UTLS）的强烈年际变化，最明显的是40° N（全年高达400 pptv）。PAN在热带UTLS的变异性也很大，我们得出的变异性高达250 pptv的平均值之间的2003年1月至10月。这些结果代表了UTLS中PAN的第一次季节性观测。
Abstract. The Michelson Interferometer for Passive Atmospheric Sounding onboard ENVISAT (MIPAS–E) offers the opportunity to detect and spectrally resolve many atmospheric minor constituents affecting atmospheric chemistry. In this paper, we retrieve global, seasonal PAN volume mixing ratio (vmr) data from MIPAS-E measurements made in January, March, August and October 2003 and present results from this scheme between approximately 300 and 150 hPa. The total error on a single PAN retrieval is better than 20% outside the tropics and better than 50% in the tropics where uncertainties in water vapor dominate the total error budget. We observe clear differences in the seasonal cycle of PAN in our data, linked closely to biomass burning regions and growing seasons. Highest Northern Hemisphere mid-latitude PAN vmrs were observed in August (300–600 pptv on average) compared with the January and October data (less than 250 pptv on average). In the March 2003 data we observe highest PAN vmrs in the tropics with evidence of vmrs between 600 and 1000 pptv over Eastern Asia and over the Central Pacific at 333 hPa. The vertical distribution of PAN as a function of latitude (i.e. the zonal mean) highlights the strong inter-annual variability of PAN in the upper troposphere and lower stratosphere (UTLS), most pronounced poleward of 40° N (up to 400 pptv over the year). The variability of PAN in the tropical UTLS is also significant and we derive a variability of up to 250 pptv in the averages between January and October 2003. These results represent the first seasonal observations of PAN in the UTLS.