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
h0	[-]	3.41	3.63	3.54	0.0833	0.00300		0.649		0.668	0.848	0.758
h0a	[-]	3.41	3.63	3.54	0.0833	0.00300		0.649		0.668	0.848	0.758

	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
h0	[-]	3.63	3.27	5.20	0.0222	0.00319		-2.87		0.296	0.659	0.477
h0a	[-]	3.63	3.27	5.20	0.0222	0.00319		-2.87		0.296	0.659	0.477

	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
h0	[-]	6.20	5.81	4.46	0.401	0.00636		1.71		0.455	0.884	0.669
h0a	[-]	6.20	5.81	4.46	0.401	0.00636		1.71		0.455	0.884	0.669

	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
h0	[-]	0.531	0.489	1.08	0.0408	0.00262		-1.81		0.476	0.721	0.598
h0a	[-]	0.531	0.489	1.08	0.0408	0.00262		-1.81		0.476	0.721	0.598

	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
h0	[-]	3.25	2.32	2.19	0.918	0.0236		3.65		0.627	0.433	0.530
h0a	[-]	3.25	2.32	2.19	0.918	0.0236		3.65		0.627	0.433	0.530

	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
h0	[-]	3.76	3.56	6.41	0.0871	0.00126		-3.22		0.282	0.439	0.360
h0a	[-]	3.76	3.56	6.41	0.0871	0.00126		-3.22		0.282	0.439	0.360

	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
h0	[-]	7.67	7.32	17.4	0.333	0.00620		-5.52		0.358	0.783	0.570
h0a	[-]	7.67	7.32	17.4	0.333	0.00620		-5.52		0.358	0.783	0.570

	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
h0	[-]	4.40	3.94	6.59	0.481	0.00480		-3.44		0.429	0.899	0.664
h0a	[-]	4.40	3.94	6.59	0.481	0.00480		-3.44		0.429	0.899	0.664

	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
h0	[-]	0.785	0.755	1.35	0.0378			-1.85		0.519	0.513	0.516
h0a	[-]	0.785	0.755	1.35	0.0378			-1.85		0.519	0.513	0.516

	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
h0	[-]	3.24	2.71	3.77	0.537	0.00502		-0.872		0.457	0.900	0.679
h0a	[-]	3.24	2.71	3.77	0.537	0.00502		-0.872		0.457	0.900	0.679

	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
h0	[-]	2.93	2.58	4.89	0.328	0.00560		-4.22		0.366	0.837	0.602
h0a	[-]	2.93	2.58	4.89	0.328	0.00560		-4.22		0.366	0.837	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	[-]	88.2
h0	[-]	70.6	65.0	88.1	5.43	0.102		-1.52		0.480	0.830	0.655
h0a	[-]	70.6	65.0	88.1	5.43	0.102		-1.52		0.480	0.830	0.655

	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
h0	[-]	1.97	1.81	3.40	0.190	0.00125		-0.925		0.770	0.594	0.682
h0a	[-]	1.97	1.81	3.40	0.190	0.00125		-0.925		0.770	0.594	0.682

	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
h0	[-]	1.18	1.03	3.60	0.132	0.00940		-4.73		0.353	0.225	0.289
h0a	[-]	1.18	1.03	3.60	0.132	0.00940		-4.73		0.353	0.225	0.289

	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
h0	[-]	2.34	1.77	1.97	0.529	0.0175		0.465		0.591	0.882	0.736
h0a	[-]	2.34	1.77	1.97	0.529	0.0175		0.465		0.591	0.882	0.736

	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
h0	[-]	4.11	3.76	4.06	0.245	0.00154		-0.519		0.615	0.873	0.744
h0a	[-]	4.11	3.76	4.06	0.245	0.00154		-0.519		0.615	0.873	0.744

	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
h0	[-]	2.33	2.11	2.49	0.223	0.00142		-0.662		0.451	0.521	0.486
h0a	[-]	2.33	2.11	2.49	0.223	0.00142		-0.662		0.451	0.521	0.486

	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
h0	[-]	1.35	1.44	3.82	0.0156	0.00303		-5.91		0.291	0.660	0.476
h0a	[-]	1.35	1.44	3.82	0.0156	0.00303		-5.91		0.291	0.660	0.476

	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
h0	[-]	9.20	8.71	6.58	0.414			2.80		0.671	0.931	0.801
h0a	[-]	9.20	8.71	6.58	0.414			2.80		0.671	0.931	0.801

	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
h0	[-]	6.45	6.25	3.42	0.268	0.00505		4.62		0.387	0.862	0.625
h0a	[-]	6.45	6.25	3.42	0.268	0.00505		4.62		0.387	0.862	0.625

	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
h0	[-]	1.86	1.75	1.75	0.131	0.00111		0.321		0.589	0.780	0.685
h0a	[-]	1.86	1.75	1.75	0.131	0.00111		0.321		0.589	0.780	0.685

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