Africa - Central Africa - Sahel Africa - South Asia - East Siberia Asia - Indonesia Asia - North Central Asia - South Central Asia and China Asia - Southeast Asia and India Asia - West Siberia Australia Europe Global - Land Middle East and Sahara North America - Alaska and Northern Canada North America - Central America North America - Eastern United States North America - Southern Canada North America - Western United States South America - Amazon South America - Southeast South America - Southwest

	Download Data	Period Mean (original grids) [Tg yr-1]	Model Period Mean (intersection) [Tg yr-1]	Benchmark Period Mean (intersection) [Tg yr-1]	Model Period Mean (complement) [Tg yr-1]	Benchmark Period Mean (complement) [Tg yr-1]		Bias [kg ha-1 yr-1]		Bias Score [1]	Spatial Distribution Score [1]	Overall Score [1]
Benchmark	[-]	3.47
Fullgrid	[-]	2.71	2.49	3.51	0.0716			-1.91		0.758	0.840	0.799
Sparsegrid	[-]	2.84	2.51	3.51	0.178			-2.21		0.721	0.864	0.793

	Download Data	Period Mean (original grids) [Tg yr-1]	Model Period Mean (intersection) [Tg yr-1]	Benchmark Period Mean (intersection) [Tg yr-1]	Model Period Mean (complement) [Tg yr-1]	Benchmark Period Mean (complement) [Tg yr-1]		Bias [kg ha-1 yr-1]		Bias Score [1]	Spatial Distribution Score [1]	Overall Score [1]
Benchmark	[-]	5.23
Fullgrid	[-]	2.25	2.32	5.22	0.0191			-4.29		0.396	0.197	0.296
Sparsegrid	[-]	2.20	2.21	5.22	0.0482			-4.52		0.403	0.187	0.295

	Download Data	Period Mean (original grids) [Tg yr-1]	Model Period Mean (intersection) [Tg yr-1]	Benchmark Period Mean (intersection) [Tg yr-1]	Model Period Mean (complement) [Tg yr-1]	Benchmark Period Mean (complement) [Tg yr-1]		Bias [kg ha-1 yr-1]		Bias Score [1]	Spatial Distribution Score [1]	Overall Score [1]
Benchmark	[-]	4.53
Fullgrid	[-]	3.15	2.91	4.49	0.270	0.00466		-1.53		0.407	0.371	0.389
Sparsegrid	[-]	3.71	3.10	4.49	0.590	0.00466		-1.56		0.402	0.365	0.384

	Download Data	Period Mean (original grids) [Tg yr-1]	Model Period Mean (intersection) [Tg yr-1]	Benchmark Period Mean (intersection) [Tg yr-1]	Model Period Mean (complement) [Tg yr-1]	Benchmark Period Mean (complement) [Tg yr-1]		Bias [kg ha-1 yr-1]		Bias Score [1]	Spatial Distribution Score [1]	Overall Score [1]
Benchmark	[-]	1.06
Fullgrid	[-]	0.369	0.329	1.06	0.0316	0.00304		-2.40		0.528	0.0672	0.297
Sparsegrid	[-]	0.442	0.360	1.06	0.0742	0.00304		-2.40		0.529	0.109	0.319

	Download Data	Period Mean (original grids) [Tg yr-1]	Model Period Mean (intersection) [Tg yr-1]	Benchmark Period Mean (intersection) [Tg yr-1]	Model Period Mean (complement) [Tg yr-1]	Benchmark Period Mean (complement) [Tg yr-1]		Bias [kg ha-1 yr-1]		Bias Score [1]	Spatial Distribution Score [1]	Overall Score [1]
Benchmark	[-]	2.20
Fullgrid	[-]	2.14	1.45	2.18	0.603	0.0276		-0.259		0.903	0.860	0.882
Sparsegrid	[-]	4.30	2.10	2.18	1.90	0.0276		-0.319		0.882	0.967	0.924

	Download Data	Period Mean (original grids) [Tg yr-1]	Model Period Mean (intersection) [Tg yr-1]	Benchmark Period Mean (intersection) [Tg yr-1]	Model Period Mean (complement) [Tg yr-1]	Benchmark Period Mean (complement) [Tg yr-1]		Bias [kg ha-1 yr-1]		Bias Score [1]	Spatial Distribution Score [1]	Overall Score [1]
Benchmark	[-]	6.28
Fullgrid	[-]	1.77	1.64	6.39	0.0555			-5.44		0.516	0.0543	0.285
Sparsegrid	[-]	1.79	1.63	6.39	0.0891			-5.47		0.513	0.0572	0.285

	Download Data	Period Mean (original grids) [Tg yr-1]	Model Period Mean (intersection) [Tg yr-1]	Benchmark Period Mean (intersection) [Tg yr-1]	Model Period Mean (complement) [Tg yr-1]	Benchmark Period Mean (complement) [Tg yr-1]		Bias [kg ha-1 yr-1]		Bias Score [1]	Spatial Distribution Score [1]	Overall Score [1]
Benchmark	[-]	17.5
Fullgrid	[-]	3.83	3.65	17.4	0.200			-7.67		0.518	0.201	0.360
Sparsegrid	[-]	4.32	3.82	17.4	0.491			-7.66		0.499	0.164	0.331

	Download Data	Period Mean (original grids) [Tg yr-1]	Model Period Mean (intersection) [Tg yr-1]	Benchmark Period Mean (intersection) [Tg yr-1]	Model Period Mean (complement) [Tg yr-1]	Benchmark Period Mean (complement) [Tg yr-1]		Bias [kg ha-1 yr-1]		Bias Score [1]	Spatial Distribution Score [1]	Overall Score [1]
Benchmark	[-]	6.61
Fullgrid	[-]	3.16	2.74	6.61	0.340			-5.28		0.620	0.635	0.627
Sparsegrid	[-]	4.25	3.00	6.61	1.02			-5.46		0.599	0.639	0.619

	Download Data	Period Mean (original grids) [Tg yr-1]	Model Period Mean (intersection) [Tg yr-1]	Benchmark Period Mean (intersection) [Tg yr-1]	Model Period Mean (complement) [Tg yr-1]	Benchmark Period Mean (complement) [Tg yr-1]		Bias [kg ha-1 yr-1]		Bias Score [1]	Spatial Distribution Score [1]	Overall Score [1]
Benchmark	[-]	1.30
Fullgrid	[-]	0.406	0.376	1.30	0.0365			-3.01		0.524	0.0380	0.281
Sparsegrid	[-]	0.417	0.363	1.30	0.0647			-3.08		0.512	0.0403	0.276

	Download Data	Period Mean (original grids) [Tg yr-1]	Model Period Mean (intersection) [Tg yr-1]	Benchmark Period Mean (intersection) [Tg yr-1]	Model Period Mean (complement) [Tg yr-1]	Benchmark Period Mean (complement) [Tg yr-1]		Bias [kg ha-1 yr-1]		Bias Score [1]	Spatial Distribution Score [1]	Overall Score [1]
Benchmark	[-]	3.77
Fullgrid	[-]	2.10	1.77	3.75	0.303	0.0131		-2.27		0.585	0.364	0.474
Sparsegrid	[-]	2.54	1.82	3.75	0.701	0.0131		-2.50		0.564	0.325	0.444

	Download Data	Period Mean (original grids) [Tg yr-1]	Model Period Mean (intersection) [Tg yr-1]	Benchmark Period Mean (intersection) [Tg yr-1]	Model Period Mean (complement) [Tg yr-1]	Benchmark Period Mean (complement) [Tg yr-1]		Bias [kg ha-1 yr-1]		Bias Score [1]	Spatial Distribution Score [1]	Overall Score [1]
Benchmark	[-]	4.91
Fullgrid	[-]	1.26	1.10	4.91	0.167			-7.58		0.502	0.129	0.315
Sparsegrid	[-]	1.63	1.21	4.91	0.418			-7.70		0.493	0.131	0.312

	Download Data	Period Mean (original grids) [Tg yr-1]	Model Period Mean (intersection) [Tg yr-1]	Benchmark Period Mean (intersection) [Tg yr-1]	Model Period Mean (complement) [Tg yr-1]	Benchmark Period Mean (complement) [Tg yr-1]		Bias [kg ha-1 yr-1]		Bias Score [1]	Spatial Distribution Score [1]	Overall Score [1]
Benchmark	[-]	88.2
Fullgrid	[-]	40.0	36.2	88.1	3.32	0.0731		-3.82		0.552	0.460	0.506
Sparsegrid	[-]	47.6	38.0	88.1	8.35	0.0731		-3.90		0.540	0.450	0.495

	Download Data	Period Mean (original grids) [Tg yr-1]	Model Period Mean (intersection) [Tg yr-1]	Benchmark Period Mean (intersection) [Tg yr-1]	Model Period Mean (complement) [Tg yr-1]	Benchmark Period Mean (complement) [Tg yr-1]		Bias [kg ha-1 yr-1]		Bias Score [1]	Spatial Distribution Score [1]	Overall Score [1]
Benchmark	[-]	3.41
Fullgrid	[-]	1.44	1.26	3.38	0.124	1.08e-05		-1.26		0.623	0.146	0.384
Sparsegrid	[-]	1.55	1.26	3.38	0.243	1.08e-05		-1.31		0.602	0.132	0.367

	Download Data	Period Mean (original grids) [Tg yr-1]	Model Period Mean (intersection) [Tg yr-1]	Benchmark Period Mean (intersection) [Tg yr-1]	Model Period Mean (complement) [Tg yr-1]	Benchmark Period Mean (complement) [Tg yr-1]		Bias [kg ha-1 yr-1]		Bias Score [1]	Spatial Distribution Score [1]	Overall Score [1]
Benchmark	[-]	3.56
Fullgrid	[-]	0.795	0.627	3.58	0.126	0.00193		-5.49		0.503	0.0343	0.269
Sparsegrid	[-]	0.925	0.648	3.58	0.243	0.00193		-5.55		0.494	0.0302	0.262

	Download Data	Period Mean (original grids) [Tg yr-1]	Model Period Mean (intersection) [Tg yr-1]	Benchmark Period Mean (intersection) [Tg yr-1]	Model Period Mean (complement) [Tg yr-1]	Benchmark Period Mean (complement) [Tg yr-1]		Bias [kg ha-1 yr-1]		Bias Score [1]	Spatial Distribution Score [1]	Overall Score [1]
Benchmark	[-]	1.98
Fullgrid	[-]	1.24	0.882	1.97	0.312	0.00654		-3.13		0.692	0.808	0.750
Sparsegrid	[-]	2.13	1.12	1.97	0.861	0.00654		-3.24		0.664	0.801	0.733

	Download Data	Period Mean (original grids) [Tg yr-1]	Model Period Mean (intersection) [Tg yr-1]	Benchmark Period Mean (intersection) [Tg yr-1]	Model Period Mean (complement) [Tg yr-1]	Benchmark Period Mean (complement) [Tg yr-1]		Bias [kg ha-1 yr-1]		Bias Score [1]	Spatial Distribution Score [1]	Overall Score [1]
Benchmark	[-]	4.09
Fullgrid	[-]	1.47	1.36	4.09	0.108	0.00299		-7.07		0.538	0.311	0.424
Sparsegrid	[-]	1.72	1.40	4.09	0.246	0.00299		-7.18		0.534	0.349	0.441

	Download Data	Period Mean (original grids) [Tg yr-1]	Model Period Mean (intersection) [Tg yr-1]	Benchmark Period Mean (intersection) [Tg yr-1]	Model Period Mean (complement) [Tg yr-1]	Benchmark Period Mean (complement) [Tg yr-1]		Bias [kg ha-1 yr-1]		Bias Score [1]	Spatial Distribution Score [1]	Overall Score [1]
Benchmark	[-]	2.46
Fullgrid	[-]	1.08	0.991	2.45	0.102	0.00363		-3.02		0.622	0.0312	0.327
Sparsegrid	[-]	1.21	1.03	2.45	0.171	0.00363		-3.02		0.606	0.0445	0.325

	Download Data	Period Mean (original grids) [Tg yr-1]	Model Period Mean (intersection) [Tg yr-1]	Benchmark Period Mean (intersection) [Tg yr-1]	Model Period Mean (complement) [Tg yr-1]	Benchmark Period Mean (complement) [Tg yr-1]		Bias [kg ha-1 yr-1]		Bias Score [1]	Spatial Distribution Score [1]	Overall Score [1]
Benchmark	[-]	3.85
Fullgrid	[-]	0.836	0.825	3.85	0.00537	0.000605		-7.51		0.497	0.0742	0.286
Sparsegrid	[-]	0.892	0.877	3.85	0.0206	0.000605		-7.44		0.489	0.125	0.307

	Download Data	Period Mean (original grids) [Tg yr-1]	Model Period Mean (intersection) [Tg yr-1]	Benchmark Period Mean (intersection) [Tg yr-1]	Model Period Mean (complement) [Tg yr-1]	Benchmark Period Mean (complement) [Tg yr-1]		Bias [kg ha-1 yr-1]		Bias Score [1]	Spatial Distribution Score [1]	Overall Score [1]
Benchmark	[-]	6.52
Fullgrid	[-]	6.00	5.69	6.53	0.237			-0.879		0.742	0.352	0.547
Sparsegrid	[-]	6.33	5.74	6.53	0.488			-1.00		0.732	0.472	0.602

	Download Data	Period Mean (original grids) [Tg yr-1]	Model Period Mean (intersection) [Tg yr-1]	Benchmark Period Mean (intersection) [Tg yr-1]	Model Period Mean (complement) [Tg yr-1]	Benchmark Period Mean (complement) [Tg yr-1]		Bias [kg ha-1 yr-1]		Bias Score [1]	Spatial Distribution Score [1]	Overall Score [1]
Benchmark	[-]	3.44
Fullgrid	[-]	3.26	3.13	3.43	0.140			-0.305		0.295	0.135	0.215
Sparsegrid	[-]	3.49	3.09	3.43	0.340			-0.549		0.293	0.185	0.239

	Download Data	Period Mean (original grids) [Tg yr-1]	Model Period Mean (intersection) [Tg yr-1]	Benchmark Period Mean (intersection) [Tg yr-1]	Model Period Mean (complement) [Tg yr-1]	Benchmark Period Mean (complement) [Tg yr-1]		Bias [kg ha-1 yr-1]		Bias Score [1]	Spatial Distribution Score [1]	Overall Score [1]
Benchmark	[-]	1.80
Fullgrid	[-]	0.658	0.642	1.78	0.0495	0.00901		-3.41		0.568	0.385	0.476
Sparsegrid	[-]	0.861	0.748	1.78	0.129	0.00901		-3.29		0.589	0.411	0.500

Africa - Central Africa - Sahel Africa - South Asia - East Siberia Asia - Indonesia Asia - North Central Asia - South Central Asia and China Asia - Southeast Asia and India Asia - West Siberia Australia Europe Global - Land Middle East and Sahara North America - Alaska and Northern Canada North America - Central America North America - Eastern United States North America - Southern Canada North America - Western United States South America - Amazon South America - Southeast South America - Southwest Temporally integrated period mean Temporally integrated period mean bias Temporally integrated period mean bias score

  Title:

Biological Nitrogen Fixation

  Version:

1

  Institutions:

University of Exeter

  Source:

A comprehensive global meta analysis of field measurements

  History:

2020-12-14: obtained dataset 2020-12-14: converted to netCDF

  References:

Davies-Barnard, T. and Friedlingstein, P. (2020), The Global Distribution of Biological Nitrogen Fixation in Terrestrial Natural Ecosystems, Global Biogeochemical Cycles, 3, doi:10.1029/2019GB006387

  Comments:

time_period: single estimate from 1980 through 2019

temporal_resolution: monthly

spatial_resolution: 0.5 degree

units: kg m-2 s-1

  Convention:

CF-1.8