Spatial downscaling of remotely sensed precipitation in Taihang Mountains

Shi HU; Jian HAN; Chesheng ZHAN; Liangmeizi LIU

doi:10.11821/dlyj020190545

Journals >Geographical Research >Volume 39 >Issue 7 >Page 1680 > Article

Geographical Research
Vol. 39, Issue 7, 1680 (2020)

Spatial downscaling of remotely sensed precipitation in Taihang Mountains

Shi HU¹, Jian HAN², Chesheng ZHAN^1、*, and Liangmeizi LIU^1、3

Author Affiliations

¹Key Laboratory of Water Cycle and Related Land Surface Processes, Institute of Geographic Sciences and Natural Resources Research, CAS, Beijing 100101, China

²Powerchina Northwest Engineering Corporation Limited, Xi'an 710065, China

³University of Chinese Academy of Sciences, Beijing 100049, China

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DOI: 10.11821/dlyj020190545 Cite this Article

Shi HU, Jian HAN, Chesheng ZHAN, Liangmeizi LIU. Spatial downscaling of remotely sensed precipitation in Taihang Mountains[J]. Geographical Research, 2020, 39(7): 1680 Copy Citation Text

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Fig. 1. Location, DEM, NDVI and meteorological stations of Taihang Mountains

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Fig. 2. Spatial pattern of monthly original GPM data and downscaled GPM data in July 2015

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Fig. 3. Comparisons of observed precipitation with original GPM precipitation and downscaled GPM data at monthly scale

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Fig. 4. Comparisons of observed data with downscaling precipitation using different methods

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Fig. 5. Spatial pattern of monthly precipitation in Taihang Mountains in 2015

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Fig. 6. Effect of residual correction on downscaled precipitation

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	时滞阶数	1月	2月	3月	4月	5月	6月	7月	8月	9月	10月	11月	12月	平均
R²	0	0.42	0.72	0.92	0.92	0.74	0.62	0.76	0.81	0.82	0.89	0.37	0.33	0.628
	1	0.45	0.69	0.92	0.93	0.75	0.60	0.71	0.76	0.81	0.89	0.37	0.33	0.618
	2	0.57	0.70	0.90	0.93	0.78	0.61	0.70	0.74	0.80	0.88	0.36	0.37	0.627
	3	0.46	0.68	0.91	0.93	0.74	0.60	0.76	0.75	0.79	0.87	0.34	0.46	0.627
RMSE(mm/月)	0	3.36	3.52	7.24	6.59	18.44	26.93	32.64	35.05	15.71	7.79	11.52	1.73	14.211
	1	3.27	3.71	7.20	6.31	18.52	27.80	36.20	35.38	16.21	8.11	11.38	1.68	14.647
	2	2.91	3.69	7.54	6.52	17.67	27.56	36.31	36.70	16.44	8.40	11.82	1.71	14.771
	3	3.16	3.80	7.29	6.49	17.97	27.67	32.61	35.71	16.70	8.65	12.14	1.63	14.487
MAE(mm/月)	0	2.25	2.51	5.86	5.00	13.32	20.61	25.17	28.45	13.71	6.24	10.09	1.23	11.204
	1	2.25	2.91	5.82	4.84	13.63	21.19	26.22	28.96	13.93	6.27	9.99	1.27	11.439
	2	2.05	2.93	6.20	5.02	13.10	21.26	25.52	29.94	14.16	6.29	9.75	1.29	11.458
	3	2.19	2.94	6.07	5.04	13.35	21.63	23.68	29.71	14.68	6.56	9.81	1.23	11.407
最优时滞阶数		2	0	1	1	2	0	0	0	0	0	1	3	—

Table 1. Coefficients of determination (R²), Root Mean Square Error (RMSE) and Mean Absolute Error (MAE) between downscaled precipitation and observed precipitation in Taihang Mountains

Shi HU, Jian HAN, Chesheng ZHAN, Liangmeizi LIU. Spatial downscaling of remotely sensed precipitation in Taihang Mountains[J]. Geographical Research, 2020, 39(7): 1680

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