Modeling the results of two recent mesoscale dispersion experiments

Draxler, Roland R.

doi:10.1016/0004-6981(79)90061-1

Cited by 20 publications

(4 citation statements)

References 13 publications

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“…4 and the temperature change with altitude (AT/AZ) method proposed by the Nuclear Regulatory Commission. 5 A review of turbulent diffusion typing schemes has been prepared by Gifford 6 and a comparison of hourly predicted stability classes for a one-year period was reported by Sedefian and Bennett. 7 …”

Section: Discussionmentioning

confidence: 99%

Wind Shear Effects on Air Column Trajectories in Urban Air Pollution Models

Chang

Norbeck

1983

Journal of the Air Pollution Control Association

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Section: Discussionmentioning

confidence: 99%

Wind Shear Effects on Air Column Trajectories in Urban Air Pollution Models

Chang

Norbeck

1983

Journal of the Air Pollution Control Association

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“…Along with the IWV band in Figure 1, the time evolution of 27 backward trajectories (depicted as white curves) from time t = 0 (06 UTC 23 June 2023) is also shown. This ensemble of 27 backward trajectories is calculated from 6 hourly NCEP global reanalysis data with a horizontal resolution of 2.5° × 2.5° using the HYSPLIT trajectory model (Draxler & Rolph, 2010). Each ensemble member corresponds to slightly different initial conditions obtained by offsetting the meteorological data by one meteorological grid point in the horizontal direction, and 0.01 sigma units in the vertical direction (Stein et al., 2015).…”

Section: Methodsmentioning

confidence: 99%

Unraveling the Dynamics of Moisture Transport During Atmospheric Rivers Producing Rainfall in the Southern Andes

Mudiar,

Rondanelli,

Valenzuela

et al. 2024

Geophysical Research Letters

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Atmospheric rivers (ARs) are known to produce both beneficial and extreme rainfall, leading to natural hazards in Chile. Motivated to understand moisture transport during AR events, this study performs a moisture budget analysis along 50 zonally elongated ARs reaching the western coast of South America. We identify the convergence of moist air masses of tropical/subtropical origin along the AR as the primary source of vertically integrated water vapor (IWV). Over the open ocean, moisture convergence is nearly balanced by precipitation. The advection of moisture along the AR, although smaller compared to mass convergence, significantly increases toward the landfalling region. The near conservation of IWV over the open ocean, observed by tracking a Lagrangian atmospheric column along the ARs, is the explanation behind the seemingly tropical origin of ARs in time‐lapse visualizations of IWV.

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“…Figure 1 shows the locations of these stations. Notably, other methods of trajectory calculation may be preferred over the method used here, since several improvements have been made to trajectory calculation since Draxler [1979] proposed his method, as reviewed by Stohl [1998]. For example, the trajectory calculation based on the wind fields produced from the numerical models could be expected to be superior to those based on the method used here.…”

Section: Model Applicationmentioning

confidence: 99%

“…The backward trajectories were calculated according to the hourly mixing‐layer average wind fields on days of ozone pollution. The wind fields were determined according to the method proposed by Draxler [1979]. This method used twice‐daily rawinsonde data from upper air stations and hourly surface data from the much denser network of surface stations.…”

Section: Model Applicationmentioning

confidence: 99%

Relative source contribution analysis using an air trajectory statistical approach

Lin

Chang

2002

J. Geophys. Res.

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[1] An air trajectory statistical approach was developed to estimate the relative contributions of various sources within a planning domain for a receptor site during high air pollution. The proposed approach is based on the coupling of residence time analysis and a known emission inventory. The theoretical basis of the approach is detailed. The approach was applied to investigate the relative contributions of various anthropogenic volatile organic compound (VOC) sources to the ozone formation potential of a receptor site in southern Taiwan. One hundred and ninety-seven ozone events (defined as those with an hourly ozone concentration that exceeded 120 ppb standard) over 1994-1998 were selected to undergo the residence time analysis. The VOC emission inventory was adjusted to reflect the different ozone formation potentials of the various sources by considering the source VOC profiles and the maximum incremental reactivity scales of each VOC compound. The results show that the sources that influenced the evaluated receptor site were located in northwestern coastal regions; the relative contributions of the point, line, and area sources were in the ration of approximately 5:2:3. Two districts, Kaohsiung City and Kaohsiung Hsien, were the dominant contributors of the five investigated districts. The proposed method may act as a preliminary tool to efficiently select the potential source region/category, such that mitigation and control strategies can be targeted, and/or used to guide a comprehensive modeling study.

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Modeling the results of two recent mesoscale dispersion experiments

Cited by 20 publications

References 13 publications

Wind Shear Effects on Air Column Trajectories in Urban Air Pollution Models

Wind Shear Effects on Air Column Trajectories in Urban Air Pollution Models

Unraveling the Dynamics of Moisture Transport During Atmospheric Rivers Producing Rainfall in the Southern Andes

Relative source contribution analysis using an air trajectory statistical approach

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