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 Globe 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) [%]	Model Period Mean (intersection) [%]	Model Period Mean (complement) [%]	Benchmark Period Mean (intersection) [%]	Benchmark Period Mean (complement) [%]		Bias [%]	RMSE [%]	Phase Shift [months]		Bias Score [1]	RMSE Score [1]	Seasonal Cycle Score [1]	Spatial Distribution Score [1]	Interannual Variability Score [1]	Overall Score [1]
Benchmark	[-]	77.9
PPE	[-]	69.6	69.2		77.9	77.9		-7.65	14.0	2.05		0.340	0.227	0.701	0.997	0.479	0.495
PPEnocrop	[-]	69.9	69.5		77.9	77.9		-7.38	14.0	2.03		0.342	0.228	0.707	0.997	0.480	0.497
R15	[-]	69.0	68.6		77.9	77.9		-8.19	14.3	1.99		0.330	0.228	0.716	0.997	0.479	0.496

	Download Data	Period Mean (original grids) [%]	Model Period Mean (intersection) [%]	Model Period Mean (complement) [%]	Benchmark Period Mean (intersection) [%]	Benchmark Period Mean (complement) [%]		Bias [%]	RMSE [%]	Phase Shift [months]		Bias Score [1]	RMSE Score [1]	Seasonal Cycle Score [1]	Spatial Distribution Score [1]	Interannual Variability Score [1]	Overall Score [1]
Benchmark	[-]	53.6
PPE	[-]	50.3	50.7		53.5	80.7		-2.38	12.2	0.597		0.718	0.579	0.919	0.981	0.830	0.768
PPEnocrop	[-]	50.6	51.0		53.5	80.7		-2.11	12.2	0.596		0.719	0.577	0.920	0.983	0.830	0.768
R15	[-]	50.2	50.5		53.5	80.7		-2.57	12.2	0.607		0.716	0.578	0.917	0.979	0.830	0.766

	Download Data	Period Mean (original grids) [%]	Model Period Mean (intersection) [%]	Model Period Mean (complement) [%]	Benchmark Period Mean (intersection) [%]	Benchmark Period Mean (complement) [%]		Bias [%]	RMSE [%]	Phase Shift [months]		Bias Score [1]	RMSE Score [1]	Seasonal Cycle Score [1]	Spatial Distribution Score [1]	Interannual Variability Score [1]	Overall Score [1]
Benchmark	[-]	64.2
PPE	[-]	61.5	61.5		63.8	78.0		-0.845	11.9	1.22		0.574	0.423	0.828	0.973	0.746	0.661
PPEnocrop	[-]	61.6	61.6		63.8	78.0		-0.731	11.9	1.22		0.574	0.422	0.828	0.974	0.747	0.661
R15	[-]	61.3	61.3		63.8	78.0		-1.01	11.8	1.22		0.577	0.424	0.829	0.972	0.745	0.662

	Download Data	Period Mean (original grids) [%]	Model Period Mean (intersection) [%]	Model Period Mean (complement) [%]	Benchmark Period Mean (intersection) [%]	Benchmark Period Mean (complement) [%]		Bias [%]	RMSE [%]	Phase Shift [months]		Bias Score [1]	RMSE Score [1]	Seasonal Cycle Score [1]	Spatial Distribution Score [1]	Interannual Variability Score [1]	Overall Score [1]
Benchmark	[-]	77.6
PPE	[-]	88.6	88.5		77.3	83.2		11.5	17.4	3.11		0.121	0.0835	0.485	0.743	0.558	0.346
PPEnocrop	[-]	88.6	88.5		77.3	83.2		11.5	17.4	3.14		0.121	0.0835	0.478	0.742	0.558	0.344
R15	[-]	88.7	88.6		77.3	83.2		11.6	17.5	2.76		0.120	0.0827	0.547	0.738	0.561	0.355

	Download Data	Period Mean (original grids) [%]	Model Period Mean (intersection) [%]	Model Period Mean (complement) [%]	Benchmark Period Mean (intersection) [%]	Benchmark Period Mean (complement) [%]		Bias [%]	RMSE [%]	Phase Shift [months]		Bias Score [1]	RMSE Score [1]	Seasonal Cycle Score [1]	Spatial Distribution Score [1]	Interannual Variability Score [1]	Overall Score [1]
Benchmark	[-]	84.2
PPE	[-]	85.8	85.9		84.5	81.2		-0.00486	5.23	1.47		0.562	0.230	0.783	0.999	0.496	0.550
PPEnocrop	[-]	86.3	86.4		84.5	81.2		0.427	5.24	1.54		0.563	0.231	0.772	0.998	0.499	0.549
R15	[-]	85.1	85.2		84.5	81.2		-0.671	5.32	1.46		0.557	0.225	0.786	0.993	0.488	0.546

	Download Data	Period Mean (original grids) [%]	Model Period Mean (intersection) [%]	Model Period Mean (complement) [%]	Benchmark Period Mean (intersection) [%]	Benchmark Period Mean (complement) [%]		Bias [%]	RMSE [%]	Phase Shift [months]		Bias Score [1]	RMSE Score [1]	Seasonal Cycle Score [1]	Spatial Distribution Score [1]	Interannual Variability Score [1]	Overall Score [1]
Benchmark	[-]	72.3
PPE	[-]	82.6	82.6		72.3	82.0		10.4	17.8	2.16		0.322	0.202	0.683	0.978	0.568	0.492
PPEnocrop	[-]	82.5	82.6		72.3	82.0		10.4	17.8	2.16		0.323	0.202	0.682	0.981	0.567	0.493
R15	[-]	82.5	82.6		72.3	82.0		10.3	17.8	2.09		0.325	0.200	0.695	0.980	0.571	0.495

	Download Data	Period Mean (original grids) [%]	Model Period Mean (intersection) [%]	Model Period Mean (complement) [%]	Benchmark Period Mean (intersection) [%]	Benchmark Period Mean (complement) [%]		Bias [%]	RMSE [%]	Phase Shift [months]		Bias Score [1]	RMSE Score [1]	Seasonal Cycle Score [1]	Spatial Distribution Score [1]	Interannual Variability Score [1]	Overall Score [1]
Benchmark	[-]	61.3
PPE	[-]	65.3	65.4		61.2	75.5		4.97	16.2	1.96		0.533	0.325	0.708	0.994	0.757	0.607
PPEnocrop	[-]	65.4	65.6		61.2	75.5		5.12	16.3	1.94		0.525	0.325	0.712	0.993	0.759	0.606
R15	[-]	65.2	65.3		61.2	75.5		4.86	16.2	1.96		0.537	0.324	0.706	0.994	0.757	0.607

	Download Data	Period Mean (original grids) [%]	Model Period Mean (intersection) [%]	Model Period Mean (complement) [%]	Benchmark Period Mean (intersection) [%]	Benchmark Period Mean (complement) [%]		Bias [%]	RMSE [%]	Phase Shift [months]		Bias Score [1]	RMSE Score [1]	Seasonal Cycle Score [1]	Spatial Distribution Score [1]	Interannual Variability Score [1]	Overall Score [1]
Benchmark	[-]	69.0
PPE	[-]	62.6	61.8		68.8	79.0		-3.74	11.5	0.972		0.599	0.384	0.862	0.942	0.644	0.636
PPEnocrop	[-]	64.1	63.3		68.8	79.0		-2.40	11.1	1.01		0.625	0.377	0.855	0.958	0.643	0.639
R15	[-]	62.4	61.6		68.8	79.0		-4.00	11.5	0.954		0.595	0.385	0.865	0.944	0.646	0.637

	Download Data	Period Mean (original grids) [%]	Model Period Mean (intersection) [%]	Model Period Mean (complement) [%]	Benchmark Period Mean (intersection) [%]	Benchmark Period Mean (complement) [%]		Bias [%]	RMSE [%]	Phase Shift [months]		Bias Score [1]	RMSE Score [1]	Seasonal Cycle Score [1]	Spatial Distribution Score [1]	Interannual Variability Score [1]	Overall Score [1]
Benchmark	[-]	78.8
PPE	[-]	88.9	88.7		78.7	85.1		10.2	16.0	2.85		0.163	0.103	0.537	0.837	0.513	0.376
PPEnocrop	[-]	88.9	88.7		78.7	85.1		10.2	16.0	2.85		0.163	0.103	0.536	0.837	0.513	0.376
R15	[-]	88.9	88.7		78.7	85.1		10.3	16.0	2.64		0.162	0.103	0.587	0.832	0.512	0.383

	Download Data	Period Mean (original grids) [%]	Model Period Mean (intersection) [%]	Model Period Mean (complement) [%]	Benchmark Period Mean (intersection) [%]	Benchmark Period Mean (complement) [%]		Bias [%]	RMSE [%]	Phase Shift [months]		Bias Score [1]	RMSE Score [1]	Seasonal Cycle Score [1]	Spatial Distribution Score [1]	Interannual Variability Score [1]	Overall Score [1]
Benchmark	[-]	53.1
PPE	[-]	50.3	50.0		52.2	74.4		1.45	7.54	0.604		0.693	0.493	0.894	0.995	0.784	0.725
PPEnocrop	[-]	50.3	50.1		52.2	74.4		1.50	7.56	0.609		0.690	0.492	0.893	0.996	0.784	0.724
R15	[-]	50.1	49.9		52.2	74.4		1.29	7.48	0.564		0.697	0.494	0.900	0.995	0.784	0.727

	Download Data	Period Mean (original grids) [%]	Model Period Mean (intersection) [%]	Model Period Mean (complement) [%]	Benchmark Period Mean (intersection) [%]	Benchmark Period Mean (complement) [%]		Bias [%]	RMSE [%]	Phase Shift [months]		Bias Score [1]	RMSE Score [1]	Seasonal Cycle Score [1]	Spatial Distribution Score [1]	Interannual Variability Score [1]	Overall Score [1]
Benchmark	[-]	76.7
PPE	[-]	77.9	77.8		76.7	81.2		0.828	9.18	1.11		0.600	0.299	0.836	0.802	0.628	0.577
PPEnocrop	[-]	78.0	77.9		76.7	81.2		0.935	9.09	1.12		0.602	0.303	0.834	0.813	0.630	0.581
R15	[-]	77.7	77.6		76.7	81.2		0.672	9.21	1.07		0.596	0.300	0.844	0.789	0.627	0.576

	Download Data	Period Mean (original grids) [%]	Model Period Mean (intersection) [%]	Model Period Mean (complement) [%]	Benchmark Period Mean (intersection) [%]	Benchmark Period Mean (complement) [%]		Bias [%]	RMSE [%]	Phase Shift [months]		Bias Score [1]	RMSE Score [1]	Seasonal Cycle Score [1]	Spatial Distribution Score [1]	Interannual Variability Score [1]	Overall Score [1]
Benchmark	[-]	74.9
PPE	[-]	69.9	69.9		66.5	79.6		5.19	13.7	1.62		0.411	0.290	0.742	0.953	0.628	0.552
PPEnocrop	[-]	70.1	70.1		66.5	79.6		5.36	13.7	1.62		0.411	0.290	0.741	0.955	0.628	0.552
R15	[-]	69.7	69.7		66.5	79.6		5.01	13.7	1.59		0.411	0.290	0.748	0.952	0.628	0.553

	Download Data	Period Mean (original grids) [%]	Model Period Mean (intersection) [%]	Model Period Mean (complement) [%]	Benchmark Period Mean (intersection) [%]	Benchmark Period Mean (complement) [%]		Bias [%]	RMSE [%]	Phase Shift [months]		Bias Score [1]	RMSE Score [1]	Seasonal Cycle Score [1]	Spatial Distribution Score [1]	Interannual Variability Score [1]	Overall Score [1]
Benchmark	[-]	37.9
PPE	[-]	41.7	41.5		37.6	72.6		6.42	12.7	0.664		0.475	0.415	0.873	0.937	0.739	0.642
PPEnocrop	[-]	41.8	41.6		37.6	72.6		6.49	12.7	0.670		0.476	0.414	0.871	0.939	0.739	0.642
R15	[-]	41.6	41.5		37.6	72.6		6.35	12.7	0.665		0.474	0.415	0.873	0.935	0.738	0.642

	Download Data	Period Mean (original grids) [%]	Model Period Mean (intersection) [%]	Model Period Mean (complement) [%]	Benchmark Period Mean (intersection) [%]	Benchmark Period Mean (complement) [%]		Bias [%]	RMSE [%]	Phase Shift [months]		Bias Score [1]	RMSE Score [1]	Seasonal Cycle Score [1]	Spatial Distribution Score [1]	Interannual Variability Score [1]	Overall Score [1]
Benchmark	[-]	77.9
PPE	[-]	88.6	88.6		77.9	83.1		11.2	16.8	2.63		0.157	0.124	0.593	1.00	0.615	0.436
PPEnocrop	[-]	88.6	88.6		77.9	83.1		11.2	16.8	2.63		0.157	0.124	0.594	1.00	0.615	0.436
R15	[-]	88.6	88.5		77.9	83.1		11.2	16.8	2.57		0.158	0.123	0.605	1.00	0.611	0.437

	Download Data	Period Mean (original grids) [%]	Model Period Mean (intersection) [%]	Model Period Mean (complement) [%]	Benchmark Period Mean (intersection) [%]	Benchmark Period Mean (complement) [%]		Bias [%]	RMSE [%]	Phase Shift [months]		Bias Score [1]	RMSE Score [1]	Seasonal Cycle Score [1]	Spatial Distribution Score [1]	Interannual Variability Score [1]	Overall Score [1]
Benchmark	[-]	69.8
PPE	[-]	67.3	66.9		69.3	79.4		0.527	9.68	1.90		0.478	0.303	0.691	0.987	0.608	0.562
PPEnocrop	[-]	67.6	67.3		69.3	79.4		0.891	9.70	1.78		0.487	0.302	0.715	0.989	0.608	0.567
R15	[-]	67.0	66.6		69.3	79.4		0.241	9.66	1.83		0.476	0.305	0.704	0.985	0.610	0.564

	Download Data	Period Mean (original grids) [%]	Model Period Mean (intersection) [%]	Model Period Mean (complement) [%]	Benchmark Period Mean (intersection) [%]	Benchmark Period Mean (complement) [%]		Bias [%]	RMSE [%]	Phase Shift [months]		Bias Score [1]	RMSE Score [1]	Seasonal Cycle Score [1]	Spatial Distribution Score [1]	Interannual Variability Score [1]	Overall Score [1]
Benchmark	[-]	69.7
PPE	[-]	76.8	76.7		69.6	76.2		6.95	11.6	2.69		0.367	0.252	0.581	0.992	0.688	0.522
PPEnocrop	[-]	77.1	77.1		69.6	76.2		7.31	11.8	2.70		0.355	0.255	0.580	0.989	0.686	0.520
R15	[-]	76.3	76.3		69.6	76.2		6.54	11.5	2.67		0.380	0.249	0.582	0.998	0.687	0.524

	Download Data	Period Mean (original grids) [%]	Model Period Mean (intersection) [%]	Model Period Mean (complement) [%]	Benchmark Period Mean (intersection) [%]	Benchmark Period Mean (complement) [%]		Bias [%]	RMSE [%]	Phase Shift [months]		Bias Score [1]	RMSE Score [1]	Seasonal Cycle Score [1]	Spatial Distribution Score [1]	Interannual Variability Score [1]	Overall Score [1]
Benchmark	[-]	72.4
PPE	[-]	82.1	82.1		72.2	82.1		9.98	14.9	1.53		0.295	0.244	0.801	0.952	0.692	0.538
PPEnocrop	[-]	82.1	82.1		72.2	82.1		9.96	14.9	1.56		0.296	0.244	0.797	0.958	0.691	0.538
R15	[-]	81.9	81.9		72.2	82.1		9.76	14.8	1.48		0.304	0.241	0.811	0.958	0.689	0.541

	Download Data	Period Mean (original grids) [%]	Model Period Mean (intersection) [%]	Model Period Mean (complement) [%]	Benchmark Period Mean (intersection) [%]	Benchmark Period Mean (complement) [%]		Bias [%]	RMSE [%]	Phase Shift [months]		Bias Score [1]	RMSE Score [1]	Seasonal Cycle Score [1]	Spatial Distribution Score [1]	Interannual Variability Score [1]	Overall Score [1]
Benchmark	[-]	53.7
PPE	[-]	64.2	64.1		53.6	76.5		11.0	15.7	1.21		0.409	0.419	0.844	0.985	0.783	0.643
PPEnocrop	[-]	64.3	64.2		53.6	76.5		11.1	15.8	1.14		0.409	0.419	0.858	0.984	0.783	0.645
R15	[-]	64.1	64.0		53.6	76.5		10.9	15.6	1.17		0.415	0.419	0.851	0.982	0.786	0.645

	Download Data	Period Mean (original grids) [%]	Model Period Mean (intersection) [%]	Model Period Mean (complement) [%]	Benchmark Period Mean (intersection) [%]	Benchmark Period Mean (complement) [%]		Bias [%]	RMSE [%]	Phase Shift [months]		Bias Score [1]	RMSE Score [1]	Seasonal Cycle Score [1]	Spatial Distribution Score [1]	Interannual Variability Score [1]	Overall Score [1]
Benchmark	[-]	84.9
PPE	[-]	80.6	80.7		84.9	81.5		-4.12	10.7	1.31		0.458	0.250	0.832	0.906	0.523	0.536
PPEnocrop	[-]	80.6	80.8		84.9	81.5		-4.04	10.6	1.30		0.458	0.249	0.833	0.908	0.524	0.537
R15	[-]	79.9	80.0		84.9	81.5		-4.79	10.9	1.32		0.432	0.248	0.829	0.910	0.518	0.531

	Download Data	Period Mean (original grids) [%]	Model Period Mean (intersection) [%]	Model Period Mean (complement) [%]	Benchmark Period Mean (intersection) [%]	Benchmark Period Mean (complement) [%]		Bias [%]	RMSE [%]	Phase Shift [months]		Bias Score [1]	RMSE Score [1]	Seasonal Cycle Score [1]	Spatial Distribution Score [1]	Interannual Variability Score [1]	Overall Score [1]
Benchmark	[-]	70.7
PPE	[-]	72.1	72.0		70.6	79.3		1.98	13.2	1.39		0.456	0.314	0.814	0.747	0.711	0.559
PPEnocrop	[-]	72.4	72.3		70.6	79.3		2.24	13.4	1.40		0.452	0.312	0.812	0.739	0.712	0.556
R15	[-]	71.7	71.6		70.6	79.3		1.62	13.1	1.41		0.459	0.314	0.809	0.748	0.709	0.559

	Download Data	Period Mean (original grids) [%]	Model Period Mean (intersection) [%]	Model Period Mean (complement) [%]	Benchmark Period Mean (intersection) [%]	Benchmark Period Mean (complement) [%]		Bias [%]	RMSE [%]	Phase Shift [months]		Bias Score [1]	RMSE Score [1]	Seasonal Cycle Score [1]	Spatial Distribution Score [1]	Interannual Variability Score [1]	Overall Score [1]
Benchmark	[-]	65.5
PPE	[-]	64.0	63.3		64.7	83.6		0.544	13.2	1.07		0.435	0.343	0.839	0.972	0.609	0.590
PPEnocrop	[-]	64.0	63.4		64.7	83.6		0.578	13.2	1.09		0.435	0.343	0.838	0.972	0.608	0.590
R15	[-]	63.8	63.1		64.7	83.6		0.351	13.2	1.02		0.438	0.343	0.847	0.970	0.608	0.591

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 Globe 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 max month Temporally integrated mean phase shift Temporally integrated mean phase shift score Interannual variability Interannual variability score Temporally integrated period mean bias Temporally integrated period mean bias score Temporally integrated period mean rmse Temporally integrated period mean rmse score Spatially integrated regional mean cycle Spatially integrated regional mean detrended cycle Spatially integrated regional mean

  Title:

derived ERA interim

  Source_file:

This product is generated from monthly ERA interim observations

  Conventions:

Please contact Prof. James Randerson (Email: jranders@uci.edu) or Dr. Mingquan Mu (mmu@uci.edu) for any question

  Creation_date:

Wed Dec 2 12:03:21 PST 2015

  Approach:

I read the monthly 2m dewpoint temperature and 2m surface air temperature from original file, and calculated 2m relative humidity using the way by John Dutton (Ceaseless Wind, John Dutton. McGraw-Hill, 1976. pp 273-274). The final data were saved by each month and each year.

  Temporal resolution:

monthly

  General information:

This product was derived from ERA interim Dataset (1979-present).

  Spatial resolution:

0.5x0.5, 1x1 and 2.5x2.5 degree

  Derived data code:

http://redwood.ess.uci.edu/mingquan/www/ILAMB/Download/CODES/CODES/subroutines/convert/convert-rhums-ERA-interim.ncl