*** Data accompanying the publication "Nitrogen deposition from aviation emissions" ***
Authors: F.D.A. Quadros, M. van Loo, M. Snellen, I.C. Dedoussi
	Aircraft Noise and Climate Effects section, Faculty of Aerospace Engineering, Delft University of Technology

Corresponding author: I.C. Dedoussi, i.c.dedoussi@tudelft.nl


*** General Information ***
2-D gridded (vertical sum) nitrogen wet and dry deposition fluxes from a series of atmospheric simulations using different aviation emissions as input. The global chemistry transport model GEOS-Chem v13.3.3 was used to produce these results. Further details about the experimental settings can be found on the accompanying article. Also included are the measurement data points (from NADP, CASTNET, EMEP, and EANET) used to compare against our modeling results, the Copernicus global land cover map regridded for our study, and the total surface area and Natura 2000 area at each grid cell.


*** Data description ***

** Nitrogen deposition from the atmospheric model **
Monthly average deposition fluxes within each grid column are given in multiple files in NetCDF-4 format. The data is separated in files according to the simulated scenario and resolution:
	* File naming *
	{col}_{simyear}_{aviation}{res}.nc4
		{col}: collection of simulation output
            "dsDry": dry deposition fluxes
            "dsWet": wet deposition fluxes
        {simyear}: year of the simulation (meteorology and non-aviation emissions)
        {aviation}: aviation emissions scenario
			"A05B": aviation full-flight emissions, year 2005
            "A19B": aviation full-flight emissions, year 2019
            "L19B": aviation landing and takeoff (LTO) emissions, year 2019
            "ZERO": no aviation emissions
        {res}: simulation resolution
            "_G2": Global 2° x 2.5° grid (lat x lon)
            "":    Global 2° x 2.5° grid (lat x lon) combined with 0.5° x 0.625° nested domains

** Measurement data used to evaluate model performance **
Annual average nitrogen deposition rates reported by NADP, CASTNET, EMEP, and EANET.
    * File name *
        "measurements.csv.bz2"
    * Column description *
        SITE:      name or code of the measuring station
        SOURCE:    measurement network
        YEAR:      calendar year
        N_WET_NH4:  wet deposition of NH4+ (kg N.km-2)
        N_WET_NO3:  wet deposition of NO3- (kg N.km-2)
        N_WET:      total nitrogen wet deposition (kg N.km-2)
        N_DRY_NH3:  dry deposition of NH3 (kg N.km-2)
        N_DRY_NH4:  dry deposition of NH4+ (kg N.km-2)
        N_DRY_HNO3: dry deposition of HNO3 (kg N.km-2)
        N_DRY_NO3:  dry deposition of NO3- (kg N.km-2)
        N_DRY:      total nitrogen dry deposition (kg N.km-2)
        N_TOTAL:    total nitrogen wet + dry deposition (kg N.km-2)
        LAT:        latitude (° north)
        LON:        longitude (° east)

** Land cover and surface area data **
Total area of each grid cell, in m2:
    "daArea_05x0625.nc4"
    "daArea_2x25.nc4"
Fraction of grid cell area per land cover class:
    "CLC_05x0625.nc4"
    "CLC_2x25.nc4"
Fraction of grid cell area in Natura 2000 sites:
    "nat2000_05x0625.nc4"
