Tropospheric ozone sources and wave activity over Mexico City and Houston during MILAGRO/Intercontinental Transport Experiment (INTEX-B) Ozonesonde Network Study, 2006 (IONS-06)

被引：56

作者：

Thompson, A. M. ^{[1
]}

Yorks, J. E. ^{[1
]}

Miller, S. K. ^{[1
]}

Witte, J. C. ^{[2
,6
]}

Dougherty, K. M. ^{[1
]}

Morris, G. A. ^{[3
]}

Baumgardner, D. ^{[4
]}

Ladino, L. ^{[4
]}

Rappengluck, B. ^{[5
]}

机构：

[1] Penn State Univ, Dept Meteorol, University Pk, PA 16802 USA

[2] SSAI Lanham, Lanham, MD USA

[3] Valparaiso Univ, Dept Phys & Astron, Valparaiso, IN 46383 USA

[4] Univ Nacl Autonoma Mexico, CCA, Mexico City, DF, Mexico

[5] Univ Houston, Dept Geosci, Houston, TX USA

[6] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA

来源：

ATMOSPHERIC CHEMISTRY AND PHYSICS | 2008年 / 8卷 / 17期

关键词：

D O I：

10.5194/acp-8-5113-2008

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

During the INTEX-B (Intercontinental Chemical Transport Experiment)/ MILAGRO (Megacities Initiative: Local and Global Research Observations) experiments in March 2006 and the associated IONS-06 (INTEX Ozonesonde Network Study: http://croc.gsfc.nasa.gov/intexb/ions06.html), regular ozonesonde launches were made over 15 North American sites. The soundings were strategically positioned to study inter-regional flows and meteorological interactions with a mixture of tropospheric O-3 sources: local pollution;, O-3 associated with convection and lightning; stratosphere-troposphere exchange. The variability of tropospheric O-3 over the Mexico City Basin (MCB; 19 degrees N, 99 degrees W) and Houston (30 degrees N, 95 degrees W) is reported here. MCB and Houston profiles displayed a double tropopause in most soundings and a subtropical tropopause layer with frequent wave disturbances, identified through O-3 laminae as gravity-wave induced. Ozonesondes launched over both cities in August and September 2006 (IONS-06, Phase 3) displayed a thicker tropospheric column O-3 (similar to 7 DU or 15-20%) than in March 2006; nearly all of the increase was in the free troposphere. In spring and summer, O-3 laminar structure manifested mixed influences from the stratosphere, convective redistribution of O-3 and precursors, and O-3 from lightning NO. Stratospheric O-3 origins were present in 39% (MCB) and 60% (Houston) of the summer sondes. Comparison of summer 2006 O-3 structure with summer 2004 sondes (IONS-04) over Houston showed 7% less tropospheric O-3 in 2006. This may reflect a sampling contrast. August to mid-September 2006 instead of July-mid August 2004.

引用

页码：5113 / 5125

页数：13

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