POAM III ozone in the upper troposphere and lowermost stratosphere: Seasonal variability and comparisons to aircraft observations
POAM III ozone in the upper troposphere and lowermost stratosphere: Seasonal variability and comparisons to aircraft observations
复制标题
对流层上层和平流层最低层的 POAM III 臭氧：季节变化以及与飞机观测的比较
DOI：
10.1029/2002jd002819
复制
发表时间：
2003
影响因子：
--
通讯作者：
A. Marenco
中科院分区：
文献类型：
--
作者：
A. Prados;G. Nedoluha;R. Bevilacqua;D. Allen;K. Hoppel;A. Marenco
[1]我们提出了极地臭氧和气溶胶测量（POAM）III观测对流层上部和平流层下部（UT/LS）区域。POAM和一致的臭氧和水蒸气的测量空中客车在役飞机（MOZAIC）计划，发生在9至12公里的高度范围内的巧合之间的现场臭氧观测进行统计比较。比较表明，POAM臭氧在UT/LS偏高约0.03-0.07 ppmv，在POAM/臭氧探空仪比较的结果很好的协议。我们发现，UT/LS臭氧在高纬度北方半球的季节变化，从POAM数据，同意与以前的测量和理论考虑。在平流层最低层，臭氧的季节性循环主要由冬季平流层中层富含臭氧的空气的非绝热下降所控制。在对流层顶区域，臭氧季节性循环的变化反映了平流层下部空气向对流层上部空气的过渡。在350 K，POAM臭氧和水汽的混合比，在POAM采样位置的等效纬度表明等熵对流层平流层交换发生在夏季和秋季。臭氧混合比的变化也表明是一致的，在350 K等熵混合的变化。
[1] We present Polar Ozone and Aerosol Measurement (POAM) III observations in the upper troposphere and lower stratosphere (UT/LS) region. A statistical comparison is performed between POAM and coincident in situ ozone observations from the Measurement of Ozone and Water Vapor by Airbus In-Service Aircraft (MOZAIC) program, with coincidences occurring over the 9 to 12 km altitude range. The comparison indicates that POAM ozone in the UT/LS is biased high by about 0.03–0.07 ppmv, in good agreement with the results of POAM/ozonesonde comparisons. We show that the seasonal variation of UT/LS ozone in the high latitude Northern Hemisphere, obtained from POAM data, agrees well with previous measurements and theoretical considerations. In the lowermost stratosphere, the ozone seasonal cycle is dominated by diabatic descent of ozone rich air from the midstratosphere during winter. In the tropopause region, changes in the ozone seasonal cycle reflect the transition from lower stratospheric to upper tropospheric air. At 350 K, POAM ozone and water vapor mixing ratios, and equivalent latitudes at POAM sampling locations indicate isentropic troposphere to stratosphere exchange occurs during summer and fall. Variations in ozone mixing ratios are also shown to be consistent with variations in isentropic mixing at 350 K.