Balloon-borne stratospheric BrO measurements: comparison with Envisat/SCIAMACHY BrO limb profiles
Balloon-borne stratospheric BrO measurements: comparison with Envisat/SCIAMACHY BrO limb profiles
复制标题
气球传播的平流层 BrO 测量：与 Envisat/SCIAMACHY BrO 边缘轮廓的比较
DOI：
10.5194/acp-6-2483-2006
复制
发表时间：
2005
影响因子：
6.3
通讯作者：
K. Pfeilsticker
中科院分区：
文献类型：
--
作者：
M. Dorf;H. Bösch;A. Butz;C. Camy‐Peyret;M. Chipperfield;A. Engel;F. Goutail;K. Grunow;F. Hendrick;S. Hrechanyy;B. Naujokat;J. Pommereau;M. Roozendael;C. Sioris;F. Stroh;F. Weidner;K. Pfeilsticker
第一次，四个平流层BrO廓线仪器的结果，并与SLIMCAT三维化学传输模式（3-D CTM）进行比较。模型计算被用来推断BrO配置文件验证集，测量3个不同的气球传感器，为新的环境卫星/SCIAMACHY（安装卫星/扫描成像吸收光谱仪的大气CHartographY）卫星仪器。气球观测包括（a）气球携带的BrO现场共振荧光探测（三重），（B）气球携带的太阳掩星DOAS测量紫外线中的BrO，（c）太阳掩星SAOZ（天顶观测分析系统）气球仪器的BrO剖面。由于平流层溴氧是受相当大的昼夜变化，没有一个测量进行足够接近的时间和空间进行直接比较，所有的气球观测被认为是从3-D CTM的输出。通过向前和向后的空气质量轨迹计算来执行参考，以使气球与卫星观测相匹配。利用一维光化学模式计算了BrO的日变化，并沿轨道进行了沿着计算。1-D的光化学模型初始化的3-D模型的输出数据与额外的限制垂直运输，总量和平流层溴的光化学的各种气球观测。2003年中纬度DOAS BrO观测得到的总[Bry]=（20.1±2.5）pptv作为比较的上限。大多数气球观测结果与光化学模式的预测在其给定的误差估计范围内一致。第一次检索演习的溴临边分析从SCIAMACHY卫星仪器平均同意约20%的光化学校正气球观测的遥感仪器（SAOZ和DOAS）。一个例外是现场三重剖面，其中气球和卫星数据在给定的误差范围内大多不一致。一般而言，卫星测量显示，25公里以下的数值系统地高于气球数据，而在约25公里以上的剖面形状发生变化。
For the first time, results of four stratospheric BrO profiling instruments, are presented and compared with reference to the SLIMCAT 3-dimensional chemical transport model (3-D CTM). Model calculations are used to infer a BrO profile validation set, measured by 3 different balloon sensors, for the new Envisat/SCIAMACHY (ENVIronment SATellite/SCanning Imaging Absorption spectroMeter for Atmospheric CHartographY) satellite instrument. The balloon observations include (a) balloon-borne in situ resonance fluorescence detection of BrO (Triple), (b) balloon-borne solar occultation DOAS measurements (Differential Optical Absorption Spectroscopy) of BrO in the UV, and (c) BrO profiling from the solar occultation SAOZ (Systeme d'Analyse par Observation Zenithale) balloon instrument. Since stratospheric BrO is subject to considerable diurnal variation and none of the measurements are performed close enough in time and space for a direct comparison, all balloon observations are considered with reference to outputs from the 3-D CTM. The referencing is performed by forward and backward air mass trajectory calculations to match the balloon with the satellite observations. The diurnal variation of BrO is considered by 1-D photochemical model calculation along the trajectories. The 1-D photochemical model is initialised with output data of the 3-D model with additional constraints on the vertical transport, the total amount and photochemistry of stratospheric bromine as given by the various balloon observations. Total [Br y ]=(20.1±2.5) pptv obtained from DOAS BrO observations at mid-latitudes in 2003, serves as an upper limit of the comparison. Most of the balloon observations agree with the photochemical model predictions within their given error estimates. First retrieval exercises of BrO limb profiling from the SCIAMACHY satellite instrument on average agree to around 20% with the photochemically-corrected balloon observations of the remote sensing instruments (SAOZ and DOAS). An exception is the in situ Triple profile, in which the balloon and satellite data mostly does not agree within the given errors. In general, the satellite measurements show systematically higher values below 25 km than the balloon data and a change in profile shape above about 25 km.