TRACE A trajectory intercomparison: 2. Isentropic and kinematic methods

Fuelberg, Henry E.; Loring, Robert O.; Watson, Mark V.; Sinha, M. C.; Pickering, Kenneth; Thompson, Anne M.; Sachse, G. W.; Blake, D. R.; Schoeberl, M. R.

doi:10.1029/95jd02122

Cited by 73 publications

(45 citation statements)

References 29 publications

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“…Additional details about our trajectory model are given in Fuelberg et al (1996Fuelberg et al ( , 2000 and Martin et al (2002). If a trajectory intersected the lower boundary, it was continued isobarically along the surface and possibly lofted later by vertical motion, a procedure similar to Stohl et al (1995).…”

Section: Trajectory Modelmentioning

confidence: 99%

A meteorological overview of the ARCTAS 2008 mission

2010

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Abstract. The Arctic Research of the Composition of theTroposphere from Aircraft and Satellites (ARCTAS) mission was a multi-aircraft project whose major objective was to investigate the factors driving changes in the Arctic's atmospheric composition and climate. It was conducted during April and June-July 2008. The summer ARCTAS deployment was preceded by a week of flights over and around California to address state issues of air quality and climate forcing. This paper focuses on meteorological conditions during the ARCTAS Spring and Summer campaigns. We examine mission averaged large-scale flow patterns at the surface, 500 hPa, and 300 hPa and determine their departures from climatology. Results from runs of the Weather Research and Forecasting (WRF) model are used to describe meteorological conditions on individual days. Our WRF configuration included a nested grid approach that provided horizontal spacing as small as 5 km. Trajectories calculated from the WRF output are used to determine transport pathways to the Arctic, including their origins and the altitudes at which they reach 70 • N. We also present backward trajectories from selected legs of individual ARCTAS flights. Finally, the FLEX-PART Lagrangian particle dispersion model, with the high resolution WRF data as input, is used to determine the paths of anthropogenic and biomass burning-derived CO. Results show that there was frequent and widespread transport to the Arctic during both phases of ARCTAS and that the three ARCTAS aircraft sampled air having a multitude of origins, following a myriad of paths, and experiencing many types of meteorological conditions.

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Section: Trajectory Modelmentioning

confidence: 99%

A meteorological overview of the ARCTAS 2008 mission

2010

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“…Although the 15 and 5 km nested data were not used explicitly, the nesting did influence the 45 km parent grid through two way interactions. Additional details about our trajectory model are given in Fuelberg et al (1996Fuelberg et al ( , 2000 and Martin et al (2002). If a trajectory intersected the lower boundary, it was continued isobarically along the surface and possibly lofted later by vertical motion, a procedure similar to Stohl et al (1995).…”

Section: Trajectory Calculationsmentioning

confidence: 99%

Anthropogenic emissions during Arctas-A: mean transport characteristics and regional case studies

et al. 2011

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Abstract. The National Aeronautics and Space Administration (NASA) conducted the Arctic Research of the Composition of the Troposphere from Aircraft and Satellites (ARC-TAS) mission during 2008 as a part of the International Polar Year (IPY). The purpose of ARCTAS was to study the factors responsible for changes in the Arctic's atmospheric composition and climate. A major emphasis was to investigate Arctic haze, which is most pronounced during winter and early spring. This study focuses on the spring phase of ARCTAS (ARCTAS-A) that was based in Alaska during April 2008. Although anthropogenic emissions historically have been associated with Arctic haze, biomass burning emissions dominated the ARCTAS-A period and have been the focus of many ARCTAS related studies.This study determines mean transport characteristics of anthropogenic emissions during ARCTAS-A. Trajectories are initiated each day from three significant regions of anthropogenic emissions (Asia, North America, and Europe). The fifteen day forward trajectories are calculated using data from the Weather Research and Forecasting (WRF) model at 45 km horizontal resolution. The trajectory calculations indicate: origins of emissions that reach the Arctic (defined as north of 70 • N) within fifteen days, pathways of these emissions, Arctic entry locations, and altitudes at which the trajectories enter the Arctic.Three cases during the ARCTAS-A period (one for each of the regions above) are examined using backward trajectories and chemical fingerprinting based on in situ data sampled from the NASA DC-8. The fingerprinting utilizes volatile Correspondence to: H. E. Fuelberg (hfuelberg@fsu.edu) organic compounds that represent pure anthropogenic tracers, Asian anthropogenic pollution, incomplete combustion, and natural gas emissions. We determine flight legs containing anthropogenic emissions and the pathways travelled by these emissions. Results show that the DC-8 sampled anthropogenic emissions from Asia, North America, and Europe during the spring phase of ARCTAS. The pathways travelled by these emissions agree with our derived transport characteristics and previous studies of Arctic transport. Meteorological analysis and trajectory calculations indicate that middle latitude cyclones and their associated warm conveyor belts play an important role in lofting the surface based emissions to their sampling altitude in all three cases.

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“…Ten day kinematic backward trajectories were provided by Florida State University (Fuelberg et al 1996(Fuelberg et al 2000Martin et al 2002). The 1 h interval trajectories at every minute of the flight location were calculated by FSU-WRF winds at 45 km resolution.…”

Section: Measurements and Datamentioning

confidence: 99%

Arctic mercury depletion and its quantitative link with halogens

et al. 2010

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Gas phase elemental mercury (Hg°) was measured aboard the NASA DC-8 research aircraft during the Arctic Research of the Composition of the Troposphere from Aircraft and Satellites (ARCTAS) campaign conducted in spring 2008 primarily over the North American Arctic. We examined the vertical distributions of Hg°and ozone (O 3 ) together with tetrachloroethylene (C 2 Cl 4 ), ethyne (C 2 H 2 ), and alkanes when Hg°-and O 3 -depleted air masses were sampled near the surface (<1 km). This study suggests that Hg°a nd O 3 depletions commonly occur over linear distances of~20-200 km. Horizontally there was a sharp decreasing gradient of~100 ppqv in Hg°over <10 km in going from the bay near Ellesmere Island to the frozen open ocean. There was a distinct land-ocean difference in the vertical thickness of the Hg°-depleted layer -being variable but around a few 100 meters over the ocean whereas occurring only very near the surface over land. Data J Atmos Chem (2010)

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TRACE A trajectory intercomparison: 2. Isentropic and kinematic methods

Cited by 73 publications

References 29 publications

A meteorological overview of the ARCTAS 2008 mission

A meteorological overview of the ARCTAS 2008 mission

Anthropogenic emissions during Arctas-A: mean transport characteristics and regional case studies

Arctic mercury depletion and its quantitative link with halogens

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