Effect of volcanic aerosol on stratospheric NO 2 and N 2 O 5 from 2002–2014 as measured by Odin-OSIRIS and Envisat-MIPAS
Effect of volcanic aerosol on stratospheric NO 2 and N 2 O 5 from 2002–2014 as measured by Odin-OSIRIS and Envisat-MIPAS
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Odin-OSIRIS 和 Envisat-MIPAS 测量的 2002-2014 年火山气溶胶对平流层 NO 2 和 N 2 O 5 的影响
DOI：
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发表时间：
2016
期刊：
影响因子：
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通讯作者：
D. Degenstein
中科院分区：
文献类型：
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作者：
C. Adams;A. Bourassa;C. McLinden;C. Sioris;T. Clarmann;B. Funke;L. Rieger;D. Degenstein
抽象的。在1991年皮纳图博火山和1982年奇钦火山大喷发之后，观察到了与气溶胶增强有关的平流层NO2的减少。光学光谱仪和红外成像光谱仪(OSIRIS)测量了2002至2014年间七次火山喷发后平流层气溶胶的普遍增强，尽管这些喷发的强度都比皮纳图博和埃尔奇钦喷发小得多。为了分离和量化火山气溶胶和NO2之间的关系，利用OSIRIS和迈克尔逊被动大气探测干涉仪(MIPAS)的测量结果计算了NO2异常。在热带地区，从时间序列中减去了由准两年一次的振荡引起的变化。Osiris剖面测量表明，NO2与火山气溶胶消光的反相关关系最强的是从给定纬度的气候平均对流层顶上方3 Km处开始的5 ∼ Km层。在这些气溶胶增强过程中，Osiris平流层NO2部分柱比背景值小60 ∼ %，典型的皮尔逊相关系数为R ∼ −0。 7.MIPAS还观察到火山气溶胶影响期间NO2部分柱的减少，相对于背景水平的百分比差异高达 ∼ 25 %。OSIRIS气溶胶光学厚度与MIPAS N2O5部分柱之间存在较强的反相关关系，R ∼ −为0. 9，但未观察到与MIPAS HNO3的联系。在估计的模型不确定性范围内，OSIRIS NO2随气溶胶增加的变化与光化学箱模型的模拟结果一致。
Abstract. Following the large volcanic eruptions of Pinatubo in 1991 and El Chichon in 1982, decreases in stratospheric NO2 associated with enhanced aerosol were observed. The Optical Spectrograph and Infrared Imaging Spectrometer (OSIRIS) measured the widespread enhancements of stratospheric aerosol following seven volcanic eruptions between 2002 and 2014, although the magnitudes of these eruptions were all much smaller than the Pinatubo and El Chichon eruptions. In order to isolate and quantify the relationship between volcanic aerosol and NO2, NO2 anomalies were calculated using measurements from OSIRIS and the Michelson Interferometer for Passive Atmospheric Sounding (MIPAS). In the tropics, variability due to the quasi-biennial oscillation was subtracted from the time series. OSIRIS profile measurements indicate that the strongest anticorrelations between NO2 and volcanic aerosol extinction were for the 5 km layer starting ∼ 3 km above the climatological mean tropopause at the given latitude. OSIRIS stratospheric NO2 partial columns in this layer were found to be smaller than background NO2 levels during these aerosol enhancements by up to ∼ 60 % with typical Pearson correlation coefficients of R ∼ −0. 7. MIPAS also observed decreases in NO2 partial columns during periods affected by volcanic aerosol, with percent differences of up to ∼ 25 % relative to background levels. An even stronger anticorrelation was observed between OSIRIS aerosol optical depth and MIPAS N2O5 partial columns, with R ∼ −0. 9, although no link with MIPAS HNO3 was observed. The variation in OSIRIS NO2 with increasing aerosol was found to be consistent with simulations from a photochemical box model within the estimated model uncertainty.