netcdf physio275Ma {
dimensions:
	latitude = 3601 ;
	longitude = 7201 ;
variables:
	double latitude(latitude) ;
		latitude:_FillValue = NaN ;
		latitude:units = "degrees_north" ;
		latitude:long_name = "latitude" ;
	double longitude(longitude) ;
		longitude:_FillValue = NaN ;
		longitude:units = "degrees_east" ;
		longitude:long_name = "longitude" ;
	double zsim(latitude, longitude) ;
		zsim:_FillValue = NaN ;
		zsim:units = "m" ;
		zsim:long_name = "Spinup paleo-elevation" ;
		zsim:description = "Simulated elevation after a spinup run used to compute water and sediment fluxes from the obtained paleo-elevation (i.e. variable z)." ;
	double erorate(latitude, longitude) ;
		erorate:_FillValue = NaN ;
		erorate:units = "mm/yr" ;
		erorate:long_name = "Average erosion deposition rate" ;
		erorate:description = "Computed from landscape evolution modelling over a 100,000 year period for the corresponding time accounting for riverine and hillslope processes." ;
	double rain(latitude, longitude) ;
		rain:_FillValue = NaN ;
		rain:units = "m/yr" ;
		rain:long_name = "Annual mean precipitation" ;
		rain:description = "Annual mean precipitation for the considered time interval extracted from the Earth Systems Modelling Results website - Bristol Research Initiative for the Dynamic Global Environment. Model ref: https://www.paleo.bristol.ac.uk/ummodel/scripts/html_bridge/scotese_02.html - Paper ref: https://www.paleo.bristol.ac.uk/ummodel/scripts/papers/Valdes_et_al_2021.html" ;
	double wflux(latitude, longitude) ;
		wflux:_FillValue = NaN ;
		wflux:units = "km3/yr" ;
		wflux:long_name = "River water discharge" ;
		wflux:description = "Computed from landscape evolution modelling over a 100,000 year period for the corresponding paleo-elevation and paleo-precipitation forcing." ;
	double sflux(latitude, longitude) ;
		sflux:_FillValue = NaN ;
		sflux:units = "km3/yr" ;
		sflux:long_name = "River sediment flux" ;
		sflux:description = "Computed from landscape evolution modelling over a 100,000 year period for the corresponding paleo-elevation and paleo-precipitation forcing. Sediment load when entering a depression decreases by the amount of sediment volume deposited and continues its routes through the spill-over point. Conversion to Mt/yr can be done by assuming a average sediment density." ;
	double basin(latitude, longitude) ;
		basin:_FillValue = NaN ;
		basin:units = "id" ;
		basin:long_name = "Drainage basin index" ;
		basin:description = "Regions where all flowing water converges to a single point are defined with a unique ID. The approach is computed from the landscape evolution results as a post-processing step assuming depression-less surface." ;
	double lakes(latitude, longitude) ;
		lakes:_FillValue = NaN ;
		lakes:units = "m" ;
		lakes:long_name = "Flooded regions water depth" ;
		lakes:description = "Flooded regions in endorheic basins considering upstream water flow, depression volume and outlet elevation. The approach does not account for evaporation and infiltration. Computed from landscape evolution modelling over a 100,000 year period for the corresponding paleo-elevation and paleo-precipitation forcing." ;
	double zpaleo(latitude, longitude) ;
		zpaleo:_FillValue = NaN ;
		zpaleo:units = "m" ;
		zpaleo:long_name = "Paleo-elevation from Scotese & Wright (2018)" ;
		zpaleo:description = "Estimate of the elevation of the land surface and depth of the ocean basins for the considered time interval. Initial 1 deg dataset comes from Scotese, Christopher R, & Wright, Nicky M. (2018). PALEOMAP Paleodigital Elevation Models (PaleoDEMS) for the Phanerozoic [Data set] - https://doi.org/10.5281/zenodo.5460860" ;
	double z(latitude, longitude) ;
		z:_FillValue = NaN ;
		z:units = "m" ;
		z:long_name = "Paleo-elevation under surface processes forcing" ;
		z:description = "Elevation assuming surface processes (riverine and hillslope) and adjusted based on Scotese & Wright (2018) paleo-elevation reconstruction." ;
	double tcor(latitude, longitude) ;
		tcor:_FillValue = NaN ;
		tcor:units = "mm/yr" ;
		tcor:long_name = "Average tectonic rate correction" ;
		tcor:description = "Rate of surface adjustments (e.g. uplift rate) extracted by computing the difference between simulated and paleo-elevation surfaces. The method consists in applying several rolling average filters to account for the long wavelenght differences between simulated and paleo-elevation surfaces in order to preserve the surface processes inprints (e.g. valleys, canyons)." ;
	double slpcat(latitude, longitude) ;
		slpcat:_FillValue = NaN ;
		slpcat:units = "category" ;
		slpcat:long_name = "Slope categorical distribution" ;
		slpcat:description = "Define 7 categories for continental slope based on NSEW slope values computed in degrees. Chosen values are 1: slope>3, 2: slope in [1.5,3], 3: slope in [0.75,1.5], 4: slope in [0.5,0.75], 5: slope in [0.25,0.5], 6: slope in [0.125,0.25] and 7: slope<0.125." ;
	double surfcat(latitude, longitude) ;
		surfcat:_FillValue = NaN ;
		surfcat:units = "category" ;
		surfcat:long_name = "Normalized surface categorical distribution" ;
		surfcat:description = "Normalized surface measures the topographic position of local relief normalized to local surface roughness. This is determined by calculating the topographic position index which compares the elevation of each cell to the mean elevation of its adjacent neighborhood cells. This slope landform is then used to appropriate for the classify 5 landforms (ridge, toe slope, slope, valley and open slopes). Chosen values have been defined to distribute the normalized surface (ns) continuous variables in 5 bins of approximately the same size: 1: ns<-0.5, 2: ns in [-0.5,-0.15], 3: ns in [-0.15,0.1275], 4: ns in [0.1275,0.525], 5: ns>0.525." ;
	double hydrocat(latitude, longitude) ;
		hydrocat:_FillValue = NaN ;
		hydrocat:units = "category" ;
		hydrocat:long_name = "Hydrology categorical distribution" ;
		hydrocat:description = "The hydrological category is based on the discharge distribution (km3/yr) obtained from the landscape evolution modelling. From the logarithmic distribution of the water flux we defined 5 categories: 1: logQs<7, 2: logQs in [7,8], 3: logQs in [8,9], 4: logQs in [9,10], 5: logQs>10." ;
	double phydiv(latitude, longitude) ;
		phydiv:_FillValue = NaN ;
		phydiv:units = "none" ;
		phydiv:long_name = "Physiographic diversity index" ;
		string phydiv:description = "The diversity of physiographic is measured based on Shannon’s equitability, which is calculated by normalizing the Shannon-Weaver diversity index. Here we use 3 categories to compute the index, namely the hydrology, normalised surface and slope categories." ;

// global attributes:
		:title = "275Ma Physiographic Dataset" ;
		:summary = "Parameters calculated using goSPL (the Global Scalable Paleo Landscape Evolution - https://gospl.readthedocs.io) using Paleo-elevation reconstructions from Scotese & Wright (2018) [PALEOMAP Project - https://doi.org/10.5281/zenodo.5460860] and Precipitation grids from Valdes et al. (2021) [https://doi.org/10.5194/cp-17-1483-2021 | data available from the Bristol Research Initiative for the Dynamic Global Environment. Model ref: https://www.paleo.bristol.ac.uk/ummodel/scripts/html_bridge/scotese_02.html]." ;
		:project = "Paleo-physiography reconstruction" ;
		:institution = "Faculty of Science | School of Geosciences | The University of Sydney | NSW | 2006" ;
		:creator_url = "http://earthcolab.org" ;
		:creator_name = "Tristan Salles" ;
		:creator_email = "tristan.salles@sydney.edu.au" ;
		:license = "CC BY-NC-SA (Creative Common) - This license allows reusers to distribute, remix, adapt, and build upon the material in any medium or format for noncommercial purposes only, and only so long as attribution is given to the creator. If you remix, adapt, or build upon the material, you must license the modified material under identical terms." ;
		:date_created = "Wed Oct  5 16:57:31 2022" ;
		:_NCProperties = "version=2,netcdf=4.7.4,hdf5=1.12.0," ;
}