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
I123pd	[-]	4.44	4.88	3.54	0.0800			3.36		0.453	0.614	0.534
post5.4	[-]	3.76	4.18	3.54	0.0727			1.78		0.572	0.673	0.623

	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
I123pd	[-]	5.98	5.36	5.20	0.0323	0.000959		0.389		0.190	0.665	0.428
post5.4	[-]	5.90	5.30	5.20	0.0319	0.000959		0.298		0.191	0.674	0.432

	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
I123pd	[-]	12.0	11.4	4.47	0.639	0.000112		8.15		0.186	0.478	0.332
post5.4	[-]	11.6	11.1	4.47	0.606	0.000112		7.79		0.193	0.497	0.345

	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
I123pd	[-]	1.15	1.07	1.08	0.0794			0.289		0.511	0.856	0.684
post5.4	[-]	1.19	1.11	1.08	0.0819			0.437		0.508	0.865	0.686

	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
I123pd	[-]	3.62	2.62	2.21	0.993	0.00166		5.11		0.429	0.394	0.412
post5.4	[-]	2.65	1.89	2.21	0.749	0.00166		1.27		0.763	0.845	0.804

	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
I123pd	[-]	5.06	4.75	6.41	0.132			-1.82		0.446	0.800	0.623
post5.4	[-]	4.46	4.18	6.41	0.114			-2.48		0.384	0.720	0.552

	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
I123pd	[-]	8.17	7.79	17.4	0.430			-5.19		0.369	0.799	0.584
post5.4	[-]	7.22	6.90	17.4	0.364			-5.73		0.347	0.720	0.533

	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
I123pd	[-]	5.47	4.99	6.60	0.510	0.000314		-1.77		0.412	0.868	0.640
post5.4	[-]	4.98	4.57	6.60	0.443	0.000314		-2.49		0.435	0.907	0.671

	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
I123pd	[-]	1.26	1.20	1.35	0.0711			-0.350		0.469	0.798	0.633
post5.4	[-]	1.23	1.18	1.35	0.0687			-0.432		0.480	0.771	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	[-]	3.77
I123pd	[-]	4.18	3.49	3.77	0.692	0.00216		0.149		0.460	0.888	0.674
post5.4	[-]	4.08	3.42	3.77	0.659	0.00216		0.0447		0.470	0.895	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	[-]	4.91
I123pd	[-]	3.83	3.31	4.89	0.455	0.00238		-2.43		0.464	0.898	0.681
post5.4	[-]	3.41	2.94	4.89	0.413	0.00238		-3.28		0.433	0.839	0.636

	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
I123pd	[-]	97.0	90.0	88.2	6.84	0.00803		0.506		0.416	0.759	0.588
post5.4	[-]	85.5	79.3	88.2	5.95	0.00803		-0.368		0.447	0.800	0.623

	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
I123pd	[-]	2.25	2.04	3.41	0.237			-0.744		0.770	0.671	0.721
post5.4	[-]	2.12	1.92	3.41	0.218			-0.823		0.773	0.626	0.699

	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
I123pd	[-]	2.26	1.94	3.61	0.287			-2.89		0.330	0.579	0.455
post5.4	[-]	2.05	1.76	3.61	0.262			-3.25		0.350	0.504	0.427

	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
I123pd	[-]	2.86	2.27	1.98	0.544	0.000448		2.89		0.406	0.772	0.589
post5.4	[-]	2.61	2.10	1.98	0.471	0.000448		2.02		0.451	0.840	0.645

	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
I123pd	[-]	7.08	6.56	4.06	0.378			7.15		0.237	0.357	0.297
post5.4	[-]	4.82	4.45	4.06	0.290			1.43		0.380	0.589	0.485

	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
I123pd	[-]	2.91	2.59	2.49	0.338			0.426		0.431	0.550	0.491
post5.4	[-]	2.43	2.15	2.49	0.283			-0.501		0.452	0.376	0.414

	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
I123pd	[-]	1.74	1.86	3.82	0.0255			-4.73		0.277	0.772	0.524
post5.4	[-]	1.58	1.65	3.82	0.0201			-5.32		0.269	0.563	0.416

	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
I123pd	[-]	11.4	10.9	6.58	0.430			5.53		0.391	0.952	0.672
post5.4	[-]	8.87	8.46	6.58	0.355			2.48		0.680	0.788	0.734

	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
I123pd	[-]	9.17	8.99	3.43	0.241			8.97		0.218	0.661	0.439
post5.4	[-]	8.42	8.25	3.43	0.230			7.78		0.247	0.761	0.504

	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
I123pd	[-]	2.18	1.97	1.75	0.212	4.31e-06		1.23		0.527	0.795	0.661
post5.4	[-]	2.00	1.81	1.75	0.188	4.31e-06		0.660		0.554	0.826	0.690

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