Climatological analysis of arctic aerosol quantity and optical properties at resolute, N.W.T.

McGuffie, K.; Cogley, J. Graham; Henderson‐Sellers, A.

doi:10.1016/0004-6981(85)90058-7

Cited by 14 publications

(3 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Some studies in Alaska have revealed that aerosol particles responsible for such air pollution have their origin outside Alaska (Stonehouse, 1986;Tyson, 1990). The seasonal variation in AOD at Resolute in the Canadian Arctic, as reported by McGuffie et al (1985), is similar to the variation that Shaw and Khalil (1989) reported for Alaska. A mean AOD value of 0.1 at the standard reference wavelength of 500 nm was observed from March to May.…”

Section: Arctic Aerosol Characterizationsupporting

confidence: 71%

A North American Arctic Aerosol Climatology using Ground-based Sunphotometry

Bokoye

Royer²,

O’Neill³

et al. 2002

ARCTIC

View full text Add to dashboard Cite

ABSTRACT. The Arctic is known as a key area for the detection of climate changes and atmospheric pollution on a global scale. In this paper we describe a new Canadian sunphotometer network called AEROCAN, whose primary mandate is to establish a climatology of atmospheric aerosols. This network is part of AERONET, the worldwide federated sunphotometer network managed by the NASA Goddard Space Flight Center. The potential of sunphotometer data from the AERONET/AEROCAN network for monitoring of Arctic aerosols is illustrated, using examples of the multiyear variation of aerosol optical properties and atmospheric precipitable water vapour content at some stations, and in particular at Bonanza Creek, Alaska since 1994. Despite its sparse spatial density, the network represents an important tool for monitoring the spatio-temporal variation of Arctic aerosols. It also represents an important source of independent aerosol data, which we feel should be further developed in northern areas to improve our understanding of how atmospheric aerosols influence global climate.Key words: aerosols, sunphotometer, aerosol optical depth RÉSUMÉ. L'Arctique est reconnu comme une région clé pour la détection des changements climatiques et de la pollution atmosphérique à l'échelle planétaire. Cet article présente un nouveau réseau canadien de photomètres solaires (AEROCAN) dont le mandat principal est d'établir une climatologie des aérosols atmosphériques. Ce réseau est intégré au réseau fédéré mondial de photomètres solaires AERONET géré par le Centre des vols spatiaux Goddard de la NASA. Le potentiel des données héliophotométriques générées par le réseau AERONET/AEROCAN pour la surveillance des aérosols dans l'Arctique est illustré à l'aide d'exemples de la variation pluriannuelle des paramètres optiques des aérosols et du contenu en vapeur d'eau atmosphérique précipitable à diverses stations, en particulier à Bonanza Creek (Alaska) depuis 1994. Malgré sa faible densité spatiale, le réseau représente un outil important pour la surveillance de la variation spatio-temporelle des aérosols arctiques. Il représente en outre une source majeure de données indépendantes sur les aérosols, données dont la provenance devrait, selon nous, englober les régions boréales afin que nous ayons une meilleure compréhension de l'influence des aérosols atmosphériques sur le climat de la planète.

show abstract

Section: Arctic Aerosol Characterizationsupporting

confidence: 71%

A North American Arctic Aerosol Climatology using Ground-based Sunphotometry

Bokoye

Royer²,

O’Neill³

et al. 2002

ARCTIC

View full text Add to dashboard Cite

show abstract

“…Consider, for example, the data set presented by McGuffie et al (1985) for atmospheric optical depths estimated from solar radiation measurements at Resolute, Northwest Territories, from 1970 -79. Their observations, which could only be made in clear-sky conditions, decreased in frequency from a 10-year average of 18 in March and 44 in May to an average of 2 in August and 0 in September.…”

Section: Discussionmentioning

confidence: 99%

Arctic hazes in summer over Greenland and the North American Arctic. I: Incidence and origins

et al. 1989

View full text Add to dashboard Cite

Airborne observations during August 1985 over Greenland and the North American Arctic revealed that dense, discrete haze layers were common above 850 mb. No such hazes were found near the surface in areas remote from local sources of particles. The haze layers aloft were characterized by large light-scattering coefficients due to dry particles (maximum value 1.24 x 10-4 m-'I) and relatively high total particle concentrations (maximum value 3100 cm-3). Sulfate was the dominant ionic component of the aerosol (0.06 -1.9 ktg m-3); carbon soot was also present. Evidence for relatively fresh aerosols, accompanied by NO2 and 03 depletion, was found near, but not within, the haze layers. The hazes probably derived from anthropogenic sources and/or biomass burning at midlatitudes.It is hypothesized that the scavenging of particles by stratus clouds plays an important role in reducing the frequency and intensity of hazes at the surface in the Arctic in summer. Since the detection of haze layers aloft through measurements of columnintegrated parameters from the surface (e.g., by lidar) cannot be carded out reliably when clouds are present, such measurements have likely underestimated the occurrence of haze layers in the Arctic, particularly in summer.KEY WORDS. Arctic haze, pollution in the Arctic, long-range transport of pollutants, cloud scavenging.

show abstract

“…Only those monthly averages with at least three data points are shown. Observations for 1970–1979 are from McGuffie and Cogley []. Observations for 2004 to 2014 are from AERONET Version 2 data.…”

Section: Observed and Modeled Trends Of Arctic Aerosolsmentioning

confidence: 99%

Multidecadal trends in aerosol radiative forcing over the Arctic: Contribution of changes in anthropogenic aerosol to Arctic warming since 1980

et al. 2017

View full text Add to dashboard Cite

Arctic observations show large decreases in the concentrations of sulfate and black carbon (BC) aerosols since the early 1980s. These near‐term climate‐forcing pollutants perturb the radiative balance of the atmosphere and may have played an important role in recent Arctic warming. We use the GEOS‐Chem global chemical transport model to construct a 3‐D representation of Arctic aerosols that is generally consistent with observations and their trends from 1980 to 2010. Observations at Arctic surface sites show significant decreases in sulfate and BC mass concentrations of 2–3% per year. We find that anthropogenic aerosols yield a negative forcing over the Arctic, with an average 2005–2010 Arctic shortwave radiative forcing (RF) of −0.19 ± 0.05 W m−2 at the top of atmosphere (TOA). Anthropogenic sulfate in our study yields more strongly negative forcings over the Arctic troposphere in spring (−1.17 ± 0.10 W m−2) than previously reported. From 1980 to 2010, TOA negative RF by Arctic aerosol declined, from −0.67 ± 0.06 W m−2 to −0.19 ± 0.05 W m−2, yielding a net TOA RF of +0.48 ± 0.06 W m−2. The net positive RF is due almost entirely to decreases in anthropogenic sulfate loading over the Arctic. We estimate that 1980–2010 trends in aerosol‐radiation interactions over the Arctic and Northern Hemisphere midlatitudes have contributed a net warming at the Arctic surface of +0.27 ± 0.04 K, roughly one quarter of the observed warming. Our study does not consider BC emissions from gas flaring nor the regional climate response to aerosol‐cloud interactions or BC deposition on snow.

show abstract

Climatological analysis of arctic aerosol quantity and optical properties at resolute, N.W.T.

Cited by 14 publications

References 28 publications

A North American Arctic Aerosol Climatology using Ground-based Sunphotometry

A North American Arctic Aerosol Climatology using Ground-based Sunphotometry

Arctic hazes in summer over Greenland and the North American Arctic. I: Incidence and origins

Multidecadal trends in aerosol radiative forcing over the Arctic: Contribution of changes in anthropogenic aerosol to Arctic warming since 1980

Contact Info

Product

Resources

About