Global data set of biogenic VOC emissions calculated by the MEGAN model over the last 30 years

Šindelářová, Kateřina; Granier, Claire; Bouarar, Idir; Guenther, Alex; Tilmes, Simone; Stavrakou, Trissevgeni; Müller, Jean-François; Kühn, U.; Stefani, P.; Knorr, Wolfgang

doi:10.5194/acp-14-9317-2014

Cited by 804 publications

(822 citation statements)

References 106 publications

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“…The MERRA PAR product has been successfully used to investigate biogeochemical aspects of various ecosystems (Yuan et al 2011;Cai et al 2014;Sindelarova et al 2014;Yue et al 2015). Additionally, we compared it with observational PAR obtained by the SeaWiFS satellite from 1998 to 2001 for all 37 polynyas.…”

Section: Methodsmentioning

confidence: 99%

The Evident Role of Clouds on Phytoplankton Abundance in Antarctic Coastal Polynyas

La¹,

Park²

2016

Terr. Atmos. Ocean. Sci.

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High-level primary production (PP) sustainability in the Antarctic coastal polynyas has not been adequately addressed. We investigated the relationship between the Antarctic coastal polynyas phytoplankton biomass (as reflected by Chl-a) and the cloud cover, which dominantly influences the light conditions. Phytoplankton biomass in Antarctic coastal polynyas showed a robust correlation with the photosynthetically active radiation (PAR) and the cloud fraction. However, a different relationship was observed between the phytoplankton biomass and the PAR. This relationship depended on both the ultraviolet (UV) radiation and the geographical location of the coastal polynyas. High intensity UV radiation is suspected to be an inhibitor of phytoplankton biomass. This indicates that the phytoplankton biomass is effectively limited by light intensity, which can be reduced by clouds, particularly mid-and high-level clouds, but it is not limited by light under high-level UV radiation exposure conditions.

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Section: Methodsmentioning

confidence: 99%

The Evident Role of Clouds on Phytoplankton Abundance in Antarctic Coastal Polynyas

La¹,

Park²

2016

Terr. Atmos. Ocean. Sci.

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“…Examples Previous studies show significant differences between the total amount of BVOCs emitted by vegetation (Sindelarova et al, 2014). These differences are related to the large uncertainties of different factors driving BVOC emissions, such as radiation amount, leaf temperature, and parameterisation of the soil moisture factor or the representation of canopy processes.…”

Section: Natural Emissionsmentioning

confidence: 99%

Tropospheric ozone and its precursors from the urban to the global scale from air quality to short-lived climate forcer

et al. 2015

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Abstract. Ozone holds a certain fascination in atmospheric science. It is ubiquitous in the atmosphere, central to tropospheric oxidation chemistry, yet harmful to human and ecosystem health as well as being an important greenhouse gas. It is not emitted into the atmosphere but is a byproduct of the very oxidation chemistry it largely initiates. Much effort is focused on the reduction of surface levels of ozone owing to its health and vegetation impacts, but recent efforts to achieve reductions in exposure at a country scale have proved difficult to achieve owing to increases in background ozone at the zonal hemispheric scale. There is also a growing realisation that the role of ozone as a short-lived climate pollutant could be important in integrated air quality climate change mitigation. This review examines current understanding of the processes regulating tropospheric ozone at global to local scales from both measurements and models. It takes the view that knowledge across the scales is important for dealing with air quality and climate change in a synergistic manner. The review shows that there remain a number of clear challenges for ozone such as explaining surface trends, incorporating new chemical understanding, ozone-climate coupling, and a better assessment of impacts. There is a clear and present need to treat ozone across the range of scales, a transboundary issue, but with an emphasis on the hemispheric scales. New observational opportunities are offered both by satellites and small sensors that bridge the scales.

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“…Some species with high isoprene emission potential have been identified in central and western Africa, but quantification of isoprene emissions are largely unverified for West Africa (Saxton et al, 2007). Several evaluations of isoprene and α-pinene global emissions (Luo and Yu, 2010;Guenther et al, 2012;Sindelarova et al, 2014) confine the North Africa sources to a small belt over the northern part of Morocco, Algeria and Tunisia, whereas Europe is a potential source. Some episodes, for which SOA PIN and SOA ISO were measured, do not have a trajectory over this African belt (based on the HYSPLIT model), suggesting that air masses from Europe can also incorporate gaseous precursors and oxidized species previous to their passing over Africa and Izaña in the Atlantic Ocean.…”

Section: Tracers Of Isoprene Oxidation (Soa Iso)mentioning

confidence: 99%

“…However, global estimations of isoprene and α-pinene emissions and sources show they are diverse and not equally distributed around the globe (Luo and Yu, 2010;Guenther et al, 2012;Sindelarova et al, 2014). The correlation between total concentration of SOA ISO and total concentration of SOA PIN (Fig.…”

Section: Tracers Of Isoprene Oxidation (Soa Iso)mentioning

confidence: 99%

Speciation of organic aerosols in the Saharan Air Layer and in the free troposphere westerlies

García¹,

Drooge²,

Rodrı́guez³

et al. 2017

Atmos. Chem. Phys.

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Abstract. We focused this research on the composition of the organic aerosols transported in the two main airflows of the subtropical North Atlantic free troposphere: (i) the Saharan Air Layer -the warm, dry and dusty airstream that expands from North Africa to the Americas at subtropical and tropical latitudes -and (ii) the westerlies, which flow from North America over the North Atlantic at mid-and subtropical latitudes. We determined the inorganic compounds (secondary inorganic species and elemental composition), elemental carbon and the organic fraction (bulk organic carbon and organic speciation) present in the aerosol collected at Izaña Observatory, ∼ 2400 m a.s.l. on the island of Tenerife. The concentrations of all inorganic and almost all organic compounds were higher in the Saharan Air Layer than in the westerlies, with bulk organic matter concentrations within the range 0.02-4.0 µg m −3 . In the Saharan Air Layer, the total aerosol population was by far dominated by dust (93 % of bulk mass), which was mixed with secondary inorganic pollutants (< 5 %) and organic matter (∼ 1.5 %). The chemical speciation of the organic aerosols (levoglucosan, dicarboxylic acids, saccharides, n-alkanes, hopanes, polycyclic aromatic hydrocarbons and those formed after oxidation of α-pinene and isoprene, determined by gas chromatography coupled with mass spectrometry) accounted for 15 % of the bulk organic matter (determined by the thermooptical transmission technique); the most abundant organic compounds were saccharides (associated with surface soils), secondary organic aerosols linked to oxidation of biogenic isoprene (SOA ISO) and dicarboxylic acids (linked to several primary sources and SOA). When the Saharan Air Layer shifted southward, Izaña was within the westerlies stream and organic matter accounted for ∼ 28 % of the bulk mass of aerosols. In the westerlies, the organic aerosol species determined accounted for 64 % of the bulk organic matter, with SOA ISO and dicarboxylic acids being the most abundant; the highest concentration of organic matter (3.6 µg m −3 ) and of some organic species (e.g. levoglucosan and some dicarboxylic acids) were associated with biomass burning linked to a fire in North America. In the Saharan Air Layer, the correlation found between SOA ISO and nitrate suggests a large-scale impact of enhancement of the formation rate of secondary organic aerosols due to interaction with anthropogenic NO x emissions.

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Global data set of biogenic VOC emissions calculated by the MEGAN model over the last 30 years

Cited by 804 publications

References 106 publications

The Evident Role of Clouds on Phytoplankton Abundance in Antarctic Coastal Polynyas

The Evident Role of Clouds on Phytoplankton Abundance in Antarctic Coastal Polynyas

Tropospheric ozone and its precursors from the urban to the global scale from air quality to short-lived climate forcer

Speciation of organic aerosols in the Saharan Air Layer and in the free troposphere westerlies

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