Boreal forest Global - Land Subtropical desert Temperate grassland/desert Temperate rain forest Temperate seasonal forest Tropical rain forest Tropical seasonal forest/savanna Tundra Woodland/shrubland

	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	[-]	8.21
ACCESS-ESM1-5	[-]	1.49	1.45	8.28	0.0224	0.00673		-5.28		0.412	0.672	0.542
CESM2	[-]	9.19	8.57	8.25	0.460	0.00822		0.350		0.548	0.851	0.699
MIROC-ESM2L	[-]	8.17	6.93	8.28	0.400	0.00256		-0.991		0.553	0.833	0.693
NorESM2-LM	[-]	4.57	4.04	8.25	0.171			-3.12		0.513	0.673	0.593
UKESM1-0-LL	[-]	11.1	10.1	8.23	0.611	0.0105		1.67		0.523	0.803	0.663

	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
ACCESS-ESM1-5	[-]	208.	200.	88.0	7.15	0.238		9.10		0.370	0.119	0.244
CESM2	[-]	92.2	86.0	88.0	6.10	0.278		0.149		0.549	0.825	0.687
MIROC-ESM2L	[-]	129.	115.	88.2	11.8	0.0366		2.62		0.518	0.329	0.424
NorESM2-LM	[-]	44.4	40.5	88.2	3.48			-3.42		0.494	0.783	0.638
UKESM1-0-LL	[-]	109.	101.	87.9	8.03	0.320		1.56		0.453	0.665	0.559

	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	[-]	9.24
ACCESS-ESM1-5	[-]	12.3	12.6	9.19	0.152	0.00813		1.23		0.381	0.385	0.383
CESM2	[-]	6.29	6.12	9.41	0.151	0.0119		-1.05		0.609	0.627	0.618
MIROC-ESM2L	[-]	11.0	10.2	9.20	0.306	0.00466		0.462		0.489	0.794	0.642
NorESM2-LM	[-]	1.27	1.14	9.24	0.0273			-2.72		0.378	0.316	0.347
UKESM1-0-LL	[-]	3.81	3.77	9.33	0.105	0.0101		-1.79		0.418	0.625	0.521

	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	[-]	5.37
ACCESS-ESM1-5	[-]	2.12	1.85	5.38	0.0278	0.000689		-4.10		0.396	0.684	0.540
CESM2	[-]	3.21	3.02	5.29	0.0624	0.000390		-2.65		0.453	0.636	0.544
MIROC-ESM2L	[-]	3.64	3.56	5.27	0.0622			-1.92		0.363	0.421	0.392
NorESM2-LM	[-]	1.55	1.38	5.29	0.0413			-4.58		0.419	0.489	0.454
UKESM1-0-LL	[-]	1.58	1.71	5.25	0.0228			-4.20		0.447	0.596	0.521

	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	[-]	0.352
ACCESS-ESM1-5	[-]	0.289	0.219	0.364	0.0126	0.00609		-2.75		0.442	0.425	0.433
CESM2	[-]	0.623	0.518	0.350	0.0757	0.00601		5.20		0.392	0.876	0.634
MIROC-ESM2L	[-]	0.385	0.360	0.360	0.0721			1.39		0.531	0.890	0.710
NorESM2-LM	[-]	0.489	0.287	0.363	0.0478			-0.0415		0.495	0.798	0.646
UKESM1-0-LL	[-]	0.699	0.636	0.333	0.0883	0.00567		9.92		0.300	0.880	0.590

	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	[-]	13.3
ACCESS-ESM1-5	[-]	20.4	20.0	13.3	0.610	0.0437		5.20		0.472	0.151	0.312
CESM2	[-]	15.7	14.3	13.3	1.18	0.0342		1.36		0.619	0.741	0.680
MIROC-ESM2L	[-]	28.2	25.3	13.3	2.03	0.00269		9.52		0.543	0.0435	0.293
NorESM2-LM	[-]	10.2	9.70	13.4	0.761			-1.89		0.617	0.756	0.686
UKESM1-0-LL	[-]	15.9	15.5	13.3	1.17	0.0745		2.40		0.583	0.829	0.706

	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	[-]	3.65
ACCESS-ESM1-5	[-]	7.18	6.86	3.66	0.361	0.00735		8.61		0.508	0.0250	0.267
CESM2	[-]	6.12	5.58	3.68	0.407	0.0225		5.60		0.540	0.360	0.450
MIROC-ESM2L	[-]	5.83	4.96	3.65	0.787			5.24		0.577	0.498	0.537
NorESM2-LM	[-]	2.83	2.55	3.71	0.182			-2.27		0.772	0.600	0.686
UKESM1-0-LL	[-]	9.12	8.67	3.70	0.672	0.0191		14.5		0.225	0.346	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	[-]	22.9
ACCESS-ESM1-5	[-]	141.	135.	22.9	4.28	0.0533		36.6		0.191	0.0642	0.127
CESM2	[-]	31.3	29.6	22.8	2.01	0.0801		2.59		0.472	0.877	0.675
MIROC-ESM2L	[-]	42.4	39.3	23.0	3.27	0.0205		6.10		0.463	0.705	0.584
NorESM2-LM	[-]	12.0	11.4	22.9	0.789			-3.35		0.502	0.805	0.654
UKESM1-0-LL	[-]	49.6	45.1	22.7	3.01	0.0769		8.13		0.305	0.644	0.475

	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	[-]	6.16
ACCESS-ESM1-5	[-]	0.181	0.210	6.24	0.000902	0.0182		-5.40		0.382	0.0718	0.227
CESM2	[-]	3.99	3.83	6.28	0.140	0.00846		-2.18		0.563	0.676	0.619
MIROC-ESM2L	[-]	3.99	3.66	6.22	0.229	6.55e-05		-2.22		0.738	0.223	0.480
NorESM2-LM	[-]	1.47	1.44	6.24	0.0211			-4.28		0.502	0.348	0.425
UKESM1-0-LL	[-]	3.95	3.63	6.17	0.140	0.0253		-2.22		0.673	0.537	0.605

	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	[-]	17.9
ACCESS-ESM1-5	[-]	22.5	21.8	17.9	0.744	0.0356		2.65		0.514	0.237	0.375
CESM2	[-]	14.8	14.2	18.0	0.661	0.0207		-2.07		0.575	0.601	0.588
MIROC-ESM2L	[-]	20.3	20.1	18.0	1.12	0.00202		1.87		0.547	0.165	0.356
NorESM2-LM	[-]	9.11	8.30	17.9	0.469			-5.66		0.530	0.728	0.629
UKESM1-0-LL	[-]	11.8	11.0	18.0	0.421	0.0492		-4.03		0.556	0.784	0.670

Boreal forest Global - Land Subtropical desert Temperate grassland/desert Temperate rain forest Temperate seasonal forest Tropical rain forest Tropical seasonal forest/savanna Tundra Woodland/shrubland 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