Dataset title: Model output datasets for: Constraining the atmospheric limb of the plastic cycle   
Authors: Janice Brahney, Natalie Mahowald, Marje Prank, Gavin Cornwell, Zbigniew Klimont, Hitoshi Matsui, Kim Prather

This dataset contains the model output files from the paper:
Brahney, Janice, Natalie Mahowald, Marje Prank, Gavin Cornwell, Zbigniew Klimont, Hitoshi Matsui, Kim Prather (2021). Constraining the atmospheric limb of the plastic cycle. Proceedings of the National Academy of Science. Accepted.

This dataset is shared under a Creative Commons 1.0 Universal Public Domain Dedication (https://creativecommons.org/publicdomain/zero/1.0/). The material can be copied, modified and used without permission, but attribution to the original authors is appreciated. 

Please cite this dataset as: Brahney, Janice, Natalie Mahowald, Marje Prank, Gavin Cornwell, Zbigniew Klimont, Hitoshi Matsui, Kim Prather (2021). Model output datasets for: Constraining the atmospheric limb of the plastic cycle. [Dataset]. Cornell University Library eCommons Repository. https://doi.org/10.7298/4mdh-4e97

Contact information: 
Natalie Mahowald, mahowald@cornell.edu
Janice Brahney, jbrahney@gmail.com

Acknowledgements:
The research was supported by Agricultural Experimental Station Research Grants UTA01421, UTA01384, NSF 1926559, and a USDA Forest Service Agreement to JB. NMM and MP would like to acknowledge support from Cornell Atkinson Center for Sustainability and National Science Foundation’s National Center for Atmospheric Research Computing facilities (100) and was supported by the Academy of Finland (project number 322532) H.M. was supported by the Ministry of Education, Culture, Sports, Science, and Technology and the Japan Society for the Promotion of Science (MEXT/JSPS) KAKENHI Grant Numbers JP17H04709 and JP19H05699, by the MEXT Arctic Challenge for Sustainability (ArCS) and ArCS-II projects, and by the Environment Research and Technology Development Fund (2–1703 and 2-2003) of the Environmental Restoration and Conservation Agency. We would like to thank Sagar Rathod for assistance to NM.


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Data and File Overview
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File list:
Plastics.nc

This file includes the atmospheric modeling output referred to in the file as the 'medium' case including sources, deposition, burden and surface concentration.


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Methodological information
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Description of methods is given in the paper: Brahney et al., 2021


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Data specific information
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6 bins are included, which represent in the following order: 0.3, 2.5, 7, 15, 35 and 70 micrometers in diameter particles
5 model sources (nvars) are included in the following order:  ocean, pop, dustpop, dust ag, roads, as described in the paper.

In the file are the following variables:
dimensions:
	lat = 192 ;
	lon = 288 ;
	bin = 6 ;
	nvars = 5 ;
variables:
	double lat(lat) ;
		lat:Units = "Degrees N" ;
	double lon(lon) ;
		lon:Units = "Degrees E" ;
	int bin(bin) ;
	int nvars(nvars) ;
	double source(bin, nvars, lat, lon) ;
		source:Units = "kg/m2/s" ;
		source:long_name = "Source of microplastics" ;
	double dep(bin, nvars, lat, lon) ;
		dep:Units = "kg/m2/s" ;
		dep:long_name = "Deposition of microplastics" ;
	double conc(bin, nvars, lat, lon) ;
		conc:Units = "kg/kg" ;
		conc:long_name = "Surface concentration of microplastics" ;
	double gw(lat) ;
		gw:Units = "unitless" ;
		gw:long_name = "guassian weights: grid box weighting" ;