...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Atmospheric chemistry and physics >Characteristics of tropospheric ozone depletion events in the Arctic spring: analysis of the ARCTAS, ARCPAC, and ARCIONS measurements and satellite BrO observations
【24h】

Characteristics of tropospheric ozone depletion events in the Arctic spring: analysis of the ARCTAS, ARCPAC, and ARCIONS measurements and satellite BrO observations

机译：北极春季对流层臭氧消耗事件的特征：ARCTAS，ARCPAC和ARCIONS测量结果的分析以及BrO卫星观测

获取原文
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Arctic ozone depletion events (ODEs) are caused by halogen catalyzed ozoneloss. In situ chemistry, advection of ozone-poor air mass, and verticalmixing in the lower troposphere are important factors affecting ODEs. Tobetter characterize the ODEs, we analyze the combined set of surface,ozonesonde, and aircraft in situ measurements of ozone and bromine compoundsduring the Arctic Research of the Composition of the Troposphere fromAircraft and Satellites (ARCTAS), the Aerosol, Radiation, and CloudProcesses affecting Arctic Climate (ARCPAC), and the Arctic IntensiveOzonesonde Network Study (ARCIONS) experiments (April 2008). TroposphericBrO columns retrieved from satellite measurements and back trajectorycalculations are also used to investigate the characteristics of observedODEs. In situ observations from these field experiments are inadequate tovalidate tropospheric BrO columns derived from satellite measurements. Inview of this difficulty, we construct an ensemble of tropospheric column BrOestimates from two satellite (OMI and GOME-2) measurements and with threeindependent methods of calculating stratospheric BrO columns. Furthermore,we select analysis methods that do not depend on the absolute magnitude ofcolumn BrO, such as time-lagged correlation analysis of ozone andtropospheric column BrO, to understand characteristics of ODEs. Time-laggedcorrelation analysis between in situ (surface and ozonesonde) measurementsof ozone and satellite derived tropospheric BrO columns indicates that theODEs are due to either local halogen-driven ozone loss or short-range (∼1 day) transport from nearby regions with ozone depletion. The effect of insitu ozone loss is also evident in the diurnal variation difference betweenlow (10th and 25th percentiles) and higher percentiles of surface ozoneconcentrations at Alert, Canada. Aircraft observations indicate low-ozoneair mass transported from adjacent high-BrO regions. Correlation analyses ofozone with potential temperature and time-lagged tropospheric BrO columnshow that the vertical extent of local ozone loss is surprisingly deep (1–2 km) at Resolute and Churchill, Canada. The unstable boundary layer duringODEs at Churchill could potentially provide a source of free-troposphericBrO through convective transport and explain the significant negativecorrelation between free-tropospheric ozone and tropospheric BrO column atthis site.
机译：北极臭氧消耗事件（ODE）是由卤素催化的臭氧损失引起的。在原位化学中，对流层中臭氧含量低的空气对流和垂直混合是影响ODE的重要因素。为了更好地表征ODE，我们在对飞机和卫星（ARCTAS）对流层组成进行北极研究，影响北极的气溶胶，辐射和云过程的过程中，分析了表面，臭氧探空仪和飞机上臭氧和溴化合物的组合原位测量气候（ARCPAC）和北极强臭氧探空网研究（ARCIONS）实验（2008年4月）。从卫星测量结果和反向轨迹计算中获得的对流层BrO柱也用于研究观测到的ODE的特征。这些野外实验的现场观察不足以验证源自卫星测量的对流层BrO柱。鉴于这一困难，我们从两个卫星（OMI和GOME-2）测量结果以及使用计算平流层BrO列的三种独立方法构建了一个对流层BrO估计的集合。此外，我们选择不依赖于柱BrO绝对大小的分析方法，例如臭氧和对流层柱BrO的时滞相关分析，以了解ODE的特性。臭氧和卫星对流层BrO柱的原位（表面和探空仪）测量之间的时滞相关分析表明，ODE是由于局部卤素驱动的臭氧损失或来自附近区域臭氧损耗的短距离（〜1天）运输所致。在加拿大阿勒特地区，地面臭氧浓度的低（第10和25个百分位数）与较高的百分位数之间的日变化差异也很明显地证明了原位臭氧损失的影响。飞机的观测结果表明，低臭氧空气质量是从邻近的高BrO区域运来的。臭氧与潜在温度和时滞对流层BrO柱的相关性分析表明，加拿大Resolute和丘吉尔的局部臭氧损失的垂直范围令人惊讶地深（1-2 km）。丘吉尔ODE期间的不稳定边界层可能通过对流传输提供自由对流层BrO的来源，并解释了该位置的自由对流层臭氧与对流层BrO柱之间的显着负相关。

著录项

相似文献

  • 外文文献
  • 中文文献
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号