Use of satellite data to study tropospheric ozone in the tropics

Fishman, Jack; Minnis, Patrick; Reichle, Henry G.

doi:10.1029/jd091id13p14451

Cited by 96 publications

(46 citation statements)

References 30 publications

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“…1). The enhancement of TOC is similar in magnitude as TOC enhancements observed during the follow events: (1) the wellknown biomass burning plume in the Southern Hemisphere that was transported over the South Atlantic, the coast of South Africa, along the Indian Ocean and towards Australia (e.g., Fishman et al, 1986Fishman et al, , 1991; (2) TOC attributed to anthropogenic sources in the Northern Hemisphere, for instance northern India; and (3) the Mediterranean summer ozone pool attributed to the stratospheric-tropospheric exchange (STE) (Zanis et al, 2014). A spring (or so-called pre-monsoon; see Sect.…”

Section: Introductionsupporting

confidence: 54%

Tropospheric ozone maxima observed over the Arabian Sea during the pre-monsoon

Jia¹,

Ladstätter-Weißenmayer²,

Hou

et al. 2017

Atmos. Chem. Phys.

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Abstract. An enhancement of the tropospheric ozone column (TOC) over Arabian Sea (AS) during the pre-monsoon season is reported in this study. The potential sources of the AS spring ozone pool are investigated by use of multiple data sets (e.g., SCIAMACHY Limb-Nadir-Matching TOC, OMI/MLS TOC, TES TOC, MACC reanalysis data, MOZART-4 model and HYSPLIT model). Three-quarters of the enhanced ozone concentrations are attributed to the 0-8 km height range. The main source of the ozone enhancement is considered to be caused by long-range transport of ozone pollutants from India ( ∼ 50 % contributions to the lowest 4 km, ∼ 20 % contributions to the 4-8 km height range), the Middle East, Africa and Europe (∼ 30 % in total). In addition, the vertical pollution accumulation in the lower troposphere, especially at 4-8 km, was found to be important for the AS spring ozone pool formation. Local photochemistry, on the other hand, plays a negligible role in producing ozone at the 4-8 km height range. In the 0-4 km height range, ozone is quickly removed by wet deposition. The AS spring TOC maxima are influenced by the dynamical variations caused by the sea surface temperature (SST) anomaly during the El Niño period in 2005 and 2010 with a ∼ 5 DU decrease.

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Section: Introductionsupporting

confidence: 54%

Tropospheric ozone maxima observed over the Arabian Sea during the pre-monsoon

Jia¹,

Ladstätter-Weißenmayer²,

Hou

et al. 2017

Atmos. Chem. Phys.

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“…Numerous investigations of the atmospheric impact of tropical fires have given clear evidence that elevated levels of ozone over South America and Africa are due to the excessive burning of forests and savannah, the rain forest otherwise acting as an important net sink for ozone (e.g., Delany et al, 1985;Browell et al, 1988;Gregory et al, 1988;Crutzen and Andreae, 1990;Richardson et al, 1991;Kirchhoff and Marinho, 1994;Kirchhoff, 1996;Kirchhoff et al, 1996). A retrieval of satellite measurements has given evidence of substantial ozone export to the tropical oceanic regions (Fishman et al, 1986;Fishman and Larsen, 1987), a strong burden to the otherwise clean troposphere in the Southern Hemisphere during certain periods of the year. The tropospheric ozone formation is NO x limited, with the hydrocarbon-to-NO x ratios varying between roughly 15 and 150, the latter value corresponding to boreal fires (Jaffe and Widger, 2012).…”

Section: Introductionmentioning

confidence: 99%

Stratospheric ozone in boreal fire plumes – the 2013 smoke season over central Europe

et al. 2015

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Abstract. In July 2013 very strong boreal fire plumes were observed at the northern rim of the Alps by lidar and ceilometer measurements of aerosol, ozone and water vapour for about 3 weeks. In addition, some of the lower-tropospheric components of these layers were analysed at the Global Atmosphere Watch laboratory at the Schneefernerhaus highaltitude research station (2650 m a.s.l., located a few hundred metres south-west of the Zugspitze summit). The high amount of particles confirms our hypothesis that fires in the Arctic regions of North America lead to much stronger signatures in the central European atmosphere than the multitude of fires in the USA. This has been ascribed to the prevailing anticyclonic advection pattern during favourable periods and subsidence, in contrast to warm-conveyor-belt export, rainout and dilution frequently found for lower latitudes. A high number of the pronounced aerosol structures were positively correlated with elevated ozone. Chemical ozone formation in boreal fire plumes is known to be rather limited. Indeed, these air masses could be attributed to stratospheric air intrusions descending from remote high-latitude regions, obviously picking up the aerosol on their way across Canada. In one case, subsidence from the stratosphere over Siberia over as many as 15-20 days without increase in humidity was observed although a significant amount of Canadian smoke was trapped. These coherent air streams lead to rather straight and rapid transport of the particles to Europe.

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“…As can be seen from the surface analysis, vast areas of the eastern U.S. exhibited surface concentration >90 ppb and later addressed in a reassessment of the surface ozone issue (NAS, 1991). (2003) and Schlichtel and Husar (personal communication, 1998) With the launch of TEMPO, which is planned for early next decade (~2020), the same kind of solar backscatter measurements described in the above studies (Fishman et al, 1986;1987;Ziemke et al, 1998; will be obtained from a geostationary platform that continually views the continental U.S., thereby allowing for much better spatial (~4 km) and temporal (~1-hr) resolution during daylight hours (see discussion in Fishman et al, 2012;Zoogman et al (2016). Although additional wavelengths in the visible part of the spectrum that covers the Chappuis Bands (centered at ~600 nm; Brasseur and Solomon, 1986, ch. 3) can provide some information in the lower troposphere that is more sensitive to the ozone in the boundary layer, the information in this region of the spectrum is still related to what is present in the entire column.…”

Section: B Previous Ozone Enhancements Observed By Satellitesmentioning

confidence: 99%

Analysis of a Regional Scale Chemical-Transport Model to Investigate the Potential Capability of Satellites for Identifying a Widespread Air Pollution Event

Welsh¹,

Fishman²

2017

Preprint

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We use a regional scale photochemical transport model to investigate the surface concentrations and column integrated amounts of ozone (O3) and nitrogen dioxide (NO2) during a pollution event that occurred in the St. Louis metropolitan region in 2012. These trace gases will be two of the primary constituents that will be measured by TEMPO, an instrument on a geostationary platform, which will result in a dataset that has hourly temporal resolution during the daytime and ~4 km spatial resolution. Although air quality managers are most concerned with surface concentrations, satellite measurements provide a quantity that reflects a column amount, which may or may not be directly relatable to what is measured at the surface. The model results provide good agreement with observed surface O3 concentrations, which is the only trace gas dataset that can be used for verification. The model shows that a plume of O3 extends downwind from St. Louis and contains an integrated amount of ozone of ~ 16 DU (1 DU = 2.69 x 10 16 mol. cm -2 ), a quantity that is two to three times lower than what was observed by satellite measurements during two massive pollution episodes in the 1980s. Based on the smaller isolatable emissions coming from St. Louis, this quantity is not unreasonable, but may also reflect the reduction of photochemical ozone production due to the implementation of emission controls that have gone into effect in the past few decades.

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Use of satellite data to study tropospheric ozone in the tropics

Cited by 96 publications

References 30 publications

Tropospheric ozone maxima observed over the Arabian Sea during the pre-monsoon

Tropospheric ozone maxima observed over the Arabian Sea during the pre-monsoon

Stratospheric ozone in boreal fire plumes – the 2013 smoke season over central Europe

Analysis of a Regional Scale Chemical-Transport Model to Investigate the Potential Capability of Satellites for Identifying a Widespread Air Pollution Event

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