Influence of stratospheric airmasses on tropospheric vertical O&amp;lt;sub&amp;gt;3&amp;lt;/sub&amp;gt; columns based on GOME (Global Ozone Monitoring Experiment) measurements and backtrajectory calculation over the Pacific

Ladstätter-Weißenmayer, A.; Meyer-Arnek, Julian; Schlemm, A.; Burrows, John P.

doi:10.5194/acp-4-903-2004

Cited by 16 publications

(16 citation statements)

References 14 publications

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“…In our case, the mean increase is around 2 ppbv below 6 km for both spring and winter. This increase is consistent with previous reports of the importance of the stratosphere as an ozone source in the lower troposphere (Cooper et al, 2005a;Langford et al, 2012;Lefohn et al, 2011;Trickl et al, 2011), with a 25 to 50 % contribution to the tropospheric budget (Davies and Schuepbach, 1994;Ladstätter-Weißenmayer et al, 2004;Roelofs and Lelieveld, 1997;Stevenson et al, 2006).…”

Section: The Influence Of Tropopause Folds On the Tmf Tropospheric Ozsupporting

confidence: 93%

Tropospheric ozone seasonal and long-term variability as seen by lidar and surface measurements at the JPL-Table Mountain Facility, California

Granados-Muñoz

Leblanc

2016

Atmos. Chem. Phys.

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Abstract. A combined surface and tropospheric ozone climatology and interannual variability study was performed for the first time using co-located ozone photometer measurements (2013)(2014)(2015) and tropospheric ozone differential absorption lidar measurements (2000)(2001)(2002)(2003)(2004)(2005)(2006)(2007)(2008)(2009)(2010)(2011)(2012)(2013)(2014)(2015) at the Jet Propulsion Laboratory Table Mountain Facility (TMF; elev. 2285 m), in California.The surface time series were investigated both in terms of seasonal and diurnal variability. The observed surface ozone is typical of high-elevation remote sites, with small amplitude of the seasonal and diurnal cycles, and high ozone values, compared to neighboring lower altitude stations representative of urban boundary layer conditions. The ozone mixing ratio ranges from 45 ppbv in the winter morning hours to 65 ppbv in the spring and summer afternoon hours. At the time of the lidar measurements (early night), the seasonal cycle observed at the surface is similar to that observed by lidar between 3.5 and 9 km.Above 9 km, the local tropopause height variation with time and season impacts significantly the ozone lidar observations. The frequent tropopause folds found in the vicinity of TMF (27 % of the time, mostly in winter and spring) produce a dual-peak vertical structure in ozone within the fold layer, characterized by higher-than-average values in the bottom half of the fold (12-14 km), and lower-than-averaged values in the top half of the fold (14-18 km). This structure is consistent with the expected origin of the air parcels within the fold, i.e., mid-latitude stratospheric air folding down below the upper tropospheric sub-tropical air. The influence of the tropopause folds extends down to 5 km, increasing the ozone content in the troposphere. A classification of the air parcels sampled by lidar was made at 1 km intervals between 5 and 14 km altitude, using 12-day backward trajectories (HYSPLIT, Hybrid Single Particle Lagrangian Integrated Trajectory Model). Our classification revealed the influence of the Pacific Ocean, with air parcels of low ozone content (43-60 ppbv below 9 km), and significant influence of the stratosphere leading to ozone values of 57-83 ppbv down to 8-9 km. In summer, enhanced ozone values (76 ppbv at 9 km) were found in air parcels originating from Central America, probably due to the enhanced thunderstorm activity during the North American Monsoon. Influence from Asia was observed throughout the year, with more frequent episodes during spring, associated with ozone values from 53 to 63 ppbv at 9 km.

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Section: The Influence Of Tropopause Folds On the Tmf Tropospheric Ozsupporting

confidence: 93%

Tropospheric ozone seasonal and long-term variability as seen by lidar and surface measurements at the JPL-Table Mountain Facility, California

Granados-Muñoz

Leblanc

2016

Atmos. Chem. Phys.

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“…Several other residual-based approaches have been developed over the years (e.g. Fishman et al, 1990;Fishman and Balok, 1999;Ladstätter-Weißenmayer et al, 2004;Thompson and Hudson, 1999;Ziemke et al, 1998Ziemke et al, , 2006Schoeberl et al, 2007;Ziemke et al, 2011). Also, Kim et al (2001) have used the scan angle geometry technique to retrieve tropical tropospheric O 3 , a method that requires multi-angle measurements.…”

Section: Introductionmentioning

confidence: 99%

Tropospheric column amount of ozone retrieved from SCIAMACHY limb–nadir-matching observations

Ebojie

Savigny

Ladstätter-Weißenmayer³

et al. 2014

Atmos. Meas. Tech.

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Abstract. Tropospheric ozone (O 3 ), has two main sources: transport from the stratosphere and photochemical production in the troposphere. It plays important roles in atmospheric chemistry and climate change. Its amount and destruction are being modified by anthropogenic activity. Global measurements are needed to test our understanding of its sources and sinks. In this paper, we describe the retrieval of tropospheric O 3 columns (TOCs) from the combined limb and nadir observations (hereinafter referred to as limb-nadir-matching (LNM)) of the SCanning Imaging Absorption spectroMeter for Atmospheric CHartographY (SCIAMACHY) instrument, which flew as part of the payload onboard the European Space Agency (ESA) satellite Envisat (2002Envisat ( -2012. The LNM technique used in this study is a residual approach that subtracts stratospheric O 3 columns (SOCs), retrieved from the limb observations, from the total O 3 columns (TOZs), derived from the nadir observations. The technique requires accurate knowledge of the SOCs, TOZs, tropopause height, and their associated errors. The SOCs were determined from the stratospheric O 3 profiles retrieved in the Hartley and Chappuis bands from SCIAMACHY limb scattering measurements. The TOZs were also derived from SCIAMACHY measurements, but in this case from the nadir viewing mode using the Weighting Function Differential Optical Absorption Spectroscopy (WFDOAS) technique in the Huggins band. Comparisons of the TOCs from SCIAMACHY and collocated measurements from ozonesondes in both hemispheres between January 2003 and December 2011 show agreement to within 2-5 DU (1 DU = 2.69 × 10 16 molecules cm −2 ). TOC values from SCIAMACHY have also been compared to the results from the Tropospheric Emission Spectrometer (TES) and from the LNM technique exploiting Ozone Monitoring Instrument (OMI) and Microwave Limb Sounder (MLS) data (hereinafter referred to as OMI/MLS). All compared data sets agree within the given data product error range and exhibit similar seasonal variations, which, however, differ in amplitude. The spatial distributions of tropospheric O 3 in the SCIAMACHY LNM TOC product show characteristic variations related to stratosphere-troposphere exchange (STE) processes, anthropogenic activities and biospheric emissions.

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“…Fires also represent a significant source of aerosols and trace gas emisCorrespondence to: J. Pereira (jmcpereira@isa.utl.pt) sions (Bey et al, 2001;Kinne et al, 2003;Langenfelds et al, 2002). Recent analyses based on data from the Global Burned Area 2000 (GBA2000) project estimate that 3.5 million km 2 burned globally during the year 2000 , corresponding to 2580 teragrams (Tg, dry matter) of burnt biomass (Ito and Penner, 2003).…”

Section: Introductionmentioning

confidence: 99%

Screening the ESA ATSR-2 World Fire Atlas (1997–2002)

Mota¹,

Pereira²,

Oom

et al. 2006

Atmos. Chem. Phys.

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Abstract. We screened the algorithm 2 (308 K threshold) European Space Agency (ESA) World Fire Atlas (WFA), for the period 1997-2002, using ancillary land cover, nightlights and volcanic activity datasets, combined with statistical techniques to detect the occurrence of space-time clusters of anomalous observations. The WFA is built using night time data from the Along Track Scanning Radiometer (ATSR) onboard the Second European Remote-Sensing Satellite (ERS-2). The spatial resolution of the data is 1 km and the satellite revisiting period is 3 days at the equator. The WFA is the first and longest archive of global fire observations and has been used in numerous biomass burning studies. Known limitations of the WFA are the inclusion of warm surfaces, gas flares, and city lights, and an underestimation of actual global fire activity, due to the time of satellite overpass. Nevertheless, it has been considered that the WFA contains a relatively small proportion of observations that do not correspond to vegetation fires, which is not corroborated by our findings. During the study period, the annual percentage of false alarms and non-vegetation fires varied from a minimum value of 20.6% in 1997 to a maximum of 27.9% in 1998. Gas flares and hot bare soils are the major sources of false alarms and non-vegetation fires.

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Influence of stratospheric airmasses on tropospheric vertical O<sub>3</sub> columns based on GOME (Global Ozone Monitoring Experiment) measurements and backtrajectory calculation over the Pacific

Abstract: Abstract. Satellite based GOME (Global Ozone Measuring experiment) data are used to characterize the amount of tropospheric ozone over the tropical Pacific.

Cited by 16 publications

References 14 publications

Tropospheric ozone seasonal and long-term variability as seen by lidar and surface measurements at the JPL-Table Mountain Facility, California

Tropospheric ozone seasonal and long-term variability as seen by lidar and surface measurements at the JPL-Table Mountain Facility, California

Tropospheric column amount of ozone retrieved from SCIAMACHY limb–nadir-matching observations

Screening the ESA ATSR-2 World Fire Atlas (1997–2002)

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