Spatial and temporal distribution of enhanced boundary layer BrO concentrations measured by the GOME instrument aboard ERS‐2

Wagner, Thomas; Leue, Carsten; Wenig, Mark; Pfeilsticker, K.; Platt, U.

doi:10.1029/2000jd000201

Cited by 146 publications

(157 citation statements)

References 35 publications

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“…14, it stated that, except for the results at high latitudes in spring, the seasonal and latitudinal variations of the tropospheric BrO columns are generally rather small, with a magnitude lying within the uncertainties of the retrieved tropospheric BrO columns. Our analysis tends to confirm the findings of other studies (Fitzenberger et al, 2000;Wagner et al, 2001;Richter et al, 2002;Van Roozendael et al, 2002;Hendrick et al, 2007;Theys et al, 2007) that a tropospheric BrO background with vertical columns of 1-3 × 10 13 molec cm −2 , in addition to the polar BrO emissions occurring in spring, must be present at the global scale for all seasons. This is in contrast to three studies using spectral observations of direct-sun geometry, at Lauder (Schofield et al, 2004), Arrival Heights, Antarctica (Schofield et al, 2006) and in the tropics (Dorf et al, 2008) showing tropospheric columns significantly less i.e.…”

Section: Extra-polar Tropospheric Brosupporting

confidence: 80%

Global observations of tropospheric BrO columns using GOME-2 satellite data

et al. 2011

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Abstract.Measurements from the GOME-2 satellite instrument have been analyzed for tropospheric BrO using a residual technique that combines measured BrO columns and estimates of the stratospheric BrO content from a climatological approach driven by O 3 and NO 2 observations. Comparisons between the GOME-2 results and BrO vertical columns derived from correlative ground-based and SCIAMACHY nadir observations, present a good level of consistency. We show that the adopted technique enables separation of stratospheric and tropospheric fractions of the measured total BrO columns and allows quantitative study of the BrO plumes in polar regions. While some satellite observed plumes of enhanced BrO can be explained by stratospheric descending air, we show that most BrO hotspots are of tropospheric origin, although they are often associated to regions with low tropopause heights as well. Elaborating on simulations using the p-TOMCAT tropospheric chemical transport model, this result is found to be consistent with the mechanism of bromine release through sea salt aerosols production during blowing snow events. No definitive conclusion can be drawn however on the importance of blowing snow sources in comparison to other bromine release mechanisms. Outside polar regions, evidence is provided for a global tropospheric BrO background with column of 1-3 × 10 13 molec cm −2 , consistent with previous estimates.

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Section: Extra-polar Tropospheric Brosupporting

confidence: 80%

Global observations of tropospheric BrO columns using GOME-2 satellite data

et al. 2011

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“…The expected lifetime for BrO in this situation is very short (a few minutes based on HO 2 loss mechanism estimate) hence satellite measurements might not be able to observe BrO in an aging plume in contrast to local ground-based measurements. Depending on the exact composition of the plume, rapid recycling on the abundant aerosols could also extend the BrO lifetime in analogy to polar boundary layer events where BrO can be observed over hours and days [Wagner et al, 2001].…”

Section: Discussionmentioning

confidence: 99%

BrO emission from volcanoes: A survey using GOME and SCIAMACHY measurements

Afe

Richter

Sierk

et al. 2004

Geophysical Research Letters

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[1] Volcanic eruptions are known to be a major source of SO 2 and some reactive halogen species notably HCl and HF. Recent studies have however observed the presence of large amounts of BrO with tight correlation to SO 2 in a volcanic plume by ground-based spectroscopic measurements. In this work, upper limits of BrO columns have been estimated for a number of volcanic eruptions observed in measurements made by two satellite instruments -the Global Ozone Monitoring Experiment (GOME), and the new SCanning Imaging Absorption spectroMeter for Atmospheric CHartographY (SCIAMACHY). The results obtained for the eruptions covered by satellite overpasses over the Etna, Nyamuragira, Popocatépetl, and Reventador volcanoes show no correlation between enhanced volcanic SO 2 during large eruptions and the corresponding BrO columns. Evidence for BrO enhancement was also not found in the vicinity of the Soufrière Hills volcanoes. The possible reasons for the differences between ground-based and satellite observations are considered.

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“…But still, direct measurements of BrO in the mid-latitude troposphere are rare. Hebestreit et al [1999] reported BrO up to 80 parts per trillion (ppt) in the Dead Sea valley and Wagner et al [2001] found BrO at the Caspian Sea using GOME satellite data. Bromide from sea salt deposits is most likely the origin of reactive bromine in this case ('Bromine Explosion' [Platt and Lehrer, 1997;Vogt et al, 1996]).…”

Section: Introductionmentioning

confidence: 99%

MAX‐DOAS measurements of BrO and NO₂ in the marine boundary layer

Leser

Hönninger

Platt

2003

Geophysical Research Letters

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154

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During a cruise of the German research vessel Polarstern from Bremerhaven, Germany to Capetown, South Africa in October 2000 mid latitude tropospheric bromine oxide (BrO) and nitrogen dioxide (NO2) abundances were investigated by ground‐based MAX‐DOAS (scattered light Multi Axis Differential Optical Absorption Spectroscopy). By comparing the slant column densities of absorbers measured at different elevation angles above the horizon (5° to 90°) it is possible to draw conclusions regarding the vertical distribution of the investigated absorbers (i.e., BrO and NO2). During a period of 2 days in the region north of the Canary Islands (around 35°N, 13°W) significant boundary layer BrO in the 1 ppt range was found. For the remaining time all data points ranged below the detection limit. Boundary layer NO2 was found near Europe and the Canary Islands with mixing ratios in the range of several ppb. In the remote marine air south west of Africa upper limits were derived.

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Spatial and temporal distribution of enhanced boundary layer BrO concentrations measured by the GOME instrument aboard ERS‐2

Cited by 146 publications

References 35 publications

Global observations of tropospheric BrO columns using GOME-2 satellite data

Global observations of tropospheric BrO columns using GOME-2 satellite data

BrO emission from volcanoes: A survey using GOME and SCIAMACHY measurements

MAX‐DOAS measurements of BrO and NO₂ in the marine boundary layer

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Spatial and temporal distribution of enhanced boundary layer BrO concentrations measured by the GOME instrument aboard ERS‐2

Cited by 146 publications

References 35 publications

Global observations of tropospheric BrO columns using GOME-2 satellite data

Global observations of tropospheric BrO columns using GOME-2 satellite data

BrO emission from volcanoes: A survey using GOME and SCIAMACHY measurements

MAX‐DOAS measurements of BrO and NO2 in the marine boundary layer

Contact Info

Product

Resources

About

MAX‐DOAS measurements of BrO and NO₂ in the marine boundary layer