Analysis and Estimation of Geographical and Topographic Influencing Factors for Precipitation Distribution over Complex Terrains: A Case of the Northeast Slope of the Qinghai–Tibet Plateau
Abstract
:1. Introduction
2. Study Area
3. Materials and Methods
3.1. Datasets
3.2. Methods
4. Results
4.1. Precipitation Affecting Factors
4.2. Precipitation Estimating Model
4.3. Precipitation Estimation Verification
5. Discussion
6. Conclusions
Author Contributions
Funding
Conflicts of Interest
References
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Parameters | Units | Resolution |
---|---|---|
Latitude (Lat) | Degrees | 0.001° |
Longitude (Lon) | Degrees | 0.001° |
Altitude (Alt) | Meters | 250 m |
Mean altitude within a 5-km radius (Malt) | Meters | 250 m |
Mean slope within a 5-km radius (Ms) | Degrees | 1° |
Mean aspect within a 10-km radius (Masp) | Degrees | 1° |
Tangent of the average aspect within a 10-km radius (Tm) | - | 0.01 |
Maximum altitude of the eastern sector within a 50-km radius (MaE) | Meters | 250 m |
Maximum altitude of the southern sector within a 50-km radius (MaS) | Meters | 250 m |
Maximum altitude of the western sector within a 50-km radius (MaW) | Meters | 250 m |
Maximum altitude of the northern sector within a 50-km radius (MaN) | Meters | 250 m |
Parameters | Spring | Summer | Autumn | Winter | Annual |
---|---|---|---|---|---|
Lat | −0.88 ** | −0.79 ** | −0.86 ** | −0.72 ** | −0.84 ** |
Lon | 0.17 | 0.24 ** | 0.37 ** | 0.45 ** | 0.28 ** |
Alt | −0.19 * | −0.24 * | −0.38 ** | −0.38 ** | −0.28 ** |
Malt | −0.06 | −0.12 | −0.22 * | −0.31 ** | −0.15 |
Ms | 0.37 ** | 0.31 ** | 0.32 ** | 0.28 ** | 0.33 ** |
Tm | 0.19 | 0.18 | 0.17 | 0.16 | 0.18 |
MaE | 0.11 | 0.01 | −0.09 | −0.25 ** | −0.01 |
MaS | 0.06 | −0.04 | −0.14 | −0.26 ** | −0.06 |
MaW | 0.16 | 0.10 | −0.02 | −0.16 | 0.07 |
MaN | 0.12 | 0.05 | −0.06 | −0.21 * | 0.02 |
Parameters | Spring | Summer | Autumn | Winter | Annual |
---|---|---|---|---|---|
Lat | −0.89 ** | −0.81 ** | −0.87 ** | −0.74 ** | −0.85 ** |
Lon | 0.30 * | 0.28 * | 0.38 ** | 0.43 ** | 0.32 ** |
Alt | −0.65 ** | −0.56 ** | −0.70 ** | −0.65 ** | −0.63 ** |
Malt | −0.22 | −0.23 | −0.31 * | −0.36 ** | −0.26 * |
Ms | 0.50 ** | 0.47 ** | 0.53 ** | 0.59 ** | 0.51 ** |
Tm | 0.18 | 0.15 | 0.18 | 0.18 | 0.17 |
MaE | 0.20 | 0.16 | 0.10 | −0.10 | 0.14 |
MaS | 0.07 | 0.02 | −0.03 | −0.16 | 0.01 |
MaW | 0.34 ** | 0.33 ** | 0.25 * | 0.08 | 0.30 * |
MaN | 0.21 | 0.21 | 0.14 | −0.04 | 0.19 |
Parameters | Spring | Summer | Autumn | Winter | Annual |
---|---|---|---|---|---|
Lat | −0.84 ** | −0.71 ** | −0.87 ** | −0.65 ** | −0.82 ** |
Lon | −0.24 | −0.21 | −0.22 | 0.18 | −0.21 |
Alt | 0.52 ** | 0.72 ** | 0.68 ** | 0.47 ** | 0.68 ** |
Malt | 0.34 * | 0.44 ** | −0.44 ** | 0.11 | 0.42 ** |
Ms | 0.22 | 0.10 | −0.13 | −0.12 | 0.14 |
Tm | 0.28 | 0.42 * | −0.31 | 0.26 | 0.37 * |
MaE | 0.31 | 0.25 | 0.33 * | −0.05 | 0.28 |
MaS | 0.39 * | 0.35 * | 0.40 * | 0.03 | 0.38 * |
MaW | 0.26 | 0.30 | 0.33 * | −0.03 | 0.30 |
MaN | 0.31 | 0.27 | 0.32 | −0.04 | 0.30 |
Parameter | Spring | Summer | Autumn | Winter | Annual |
---|---|---|---|---|---|
(a) Coefficients βn | |||||
Lat | −23.697 | −54.290 | −32.320 | −3.822 | −115.069 |
Lon | 7.230 | 23.157 | 15.087 | 1.762 | 50.916 |
Alt | 0.013 | 0.038 | 0.012 | 0.002 | 0.065 |
Malt | −0.031 | −0.094 | −0.042 | −0.176 | |
Ms | 0.983 | ||||
Tm | 0.613 | ||||
MaE | 0.010 | 0.010 | 0.003 | 0.026 | |
MaS | −0.001 | ||||
MaW | 0.018 | 0.065 | 0.029 | 0.107 | |
MaN | 0.018 | −0.005 | 0.032 | ||
(b) Intercept β0 | |||||
142.634 | −344.938 | −371.816 | −40.669 | −982.122 | |
(c) Adjusted coefficient of determination | |||||
0.81 | 0.70 | 0.84 | 0.71 | 0.79 |
Parameters | Spring | Summer | Autumn | Winter | Annual | Parameters | Spring | Summer | Autumn | Winter | Annual |
---|---|---|---|---|---|---|---|---|---|---|---|
(EMB) | (EMA) | ||||||||||
(a) Coefficients βn | (a) Coefficients βn | ||||||||||
Lat | −24.655 | −60.277 | −35.136 | −3.487 | −123.561 | Lat | −19.322 | −24.849 | −18.74 | −1.497 | −63.504 |
Lon | 11.059 | 25.36 | 15.931 | 1.57 | 53.599 | Lon | 1.464 | ||||
Alt | 0.020 | 0.083 | 0.018 | 0.003 | 0.110 | Alt | 0.012 | 0.063 | 0.025 | 0.006 | 0.099 |
Malt | −0.04 | −0.164 | −0.069 | −0.007 | −0.237 | Malt | −0.007 | ||||
Ms | Ms | ||||||||||
Tm | 0.343 | Tm | |||||||||
MaE | 0.022 | 0.010 | 0.108 | MaE | −0.024 | −0.010 | −0.037 | −0.024 | |||
MaS | −0.010 | −0.082 | MaS | ||||||||
MaW | 0.022 | 0.066 | 0.015 | 0.002 | 0.139 | MaW | |||||
MaN | 0.056 | 0.023 | MaN | −0.002 | |||||||
(b) Intercept β0 | (b) Intercept β0 | ||||||||||
−241.158 | −394.242 | −337.254 | −30.707 | −939.533 | 771.326 | 1066.042 | 747.08 | −95.496 | |||
(c) Adjusted Coefficient of Determination | (c) Adjusted Coefficient of Determination | ||||||||||
0.90 | 0.76 | 0.89 | 0.72 | 0.85 | 0.73 | 0.76 | 0.79 | 0.75 | 0.81 |
(a) | (b) | ||||||||
---|---|---|---|---|---|---|---|---|---|
Methods | R | ME/% | MAE/% | RMSE/% | Methods | R | ME/% | MAE/% | RMSE/% |
Spring | Spring | ||||||||
MSLR | 0.93 | −0.30 | 8.79 | 10.36 | MSLR | 0.97 | −0.13 | 7.08 | 8.72 |
MSLR + IDW | 0.92 | −0.30 | 9.44 | 10.92 | MSLR + IDW | 0.87 | 0.40 | 11.67 | 17.19 |
MSLR + LPI | 0.91 | −0.30 | 8.59 | 11.15 | MSLR + LPI | 0.92 | 0.58 | 10.34 | 13.35 |
MSLR + OK | 0.93 | −0.03 | 8.29 | 10.23 | MSLR + OK | 0.98 | 0.15 | 5.70 | 6.66 |
Summer | Summer | ||||||||
MSLR | 0.91 | 0.86 | 12.69 | 15.29 | MSLR | 0.89 | −0.04 | 8.57 | 11.71 |
MSLR + IDW | 0.96 | −0.08 | 8.10 | 9.24 | MSLR + IDW | 0.77 | 0.17 | 12.04 | 14.30 |
MSLR + LPI | 0.93 | 0.02 | 9.60 | 10.88 | MSLR + LPI | 0.80 | 0.81 | 11.88 | 17.78 |
MSLR + OK | 0.94 | 0.02 | 8.67 | 9.73 | MSLR + OK | 0.82 | 0.58 | 11.64 | 14.90 |
Autumn | Autumn | ||||||||
MSLR | 0.97 | 0.05 | 9.32 | 10.86 | MSLR | 0.94 | −0.16 | 9.65 | 12.62 |
MSLR + IDW | 0.99 | 0.08 | 8.62 | 10.01 | MSLR + IDW | 0.97 | 0.06 | 5.17 | 6.91 |
MSLR + LPI | 0.99 | −0.28 | 7.21 | 8.77 | MSLR + LPI | 0.97 | 0.14 | 6.18 | 9.55 |
MSLR +OK | 0.99 | −0.12 | 6.81 | 8.28 | MSLR + OK | 0.92 | 0.28 | 10.29 | 13.48 |
Winter | Winter | ||||||||
MSLR | 0.84 | −1.94 | 23.90 | 25.09 | MSLR | 0.84 | −0.01 | 17.36 | 22.50 |
MSLR + IDW | 0.84 | 0.32 | 14.75 | 18.97 | MSLR + IDW | 0.87 | 0.32 | 12.67 | 16.15 |
MSLR + LPI | 0.89 | 0.06 | 10.64 | 13.76 | MSLR + LPI | 0.86 | 0.48 | 16.40 | 21.03 |
MSLR + OK | 0.86 | 0.10 | 11.04 | 15.34 | MSLR + OK | 0.86 | 0.07 | 18.13 | 22.42 |
Annual | Annual | ||||||||
MSLR | 0.90 | 0.36 | 12.15 | 14.08 | MSLR | 0.97 | −0.18 | 6.64 | 8.24 |
MSLR + IDW | 0.88 | 0.91 | 14.32 | 19.77 | MSLR + IDW | 0.89 | 0.04 | 10.29 | 12.23 |
MSLR + LPI | 0.89 | 1.13 | 12.79 | 18.90 | MSLR + LPI | 0.98 | 0.02 | 5.88 | 7.19 |
MSLR + OK | 0.97 | 0.54 | 7.73 | 9.61 | MSLR + OK | 0.86 | 0.05 | 11.71 | 15.63 |
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Liu, W.; Zhang, Q.; Fu, Z.; Chen, X.; Li, H. Analysis and Estimation of Geographical and Topographic Influencing Factors for Precipitation Distribution over Complex Terrains: A Case of the Northeast Slope of the Qinghai–Tibet Plateau. Atmosphere 2018, 9, 349. https://doi.org/10.3390/atmos9090349
Liu W, Zhang Q, Fu Z, Chen X, Li H. Analysis and Estimation of Geographical and Topographic Influencing Factors for Precipitation Distribution over Complex Terrains: A Case of the Northeast Slope of the Qinghai–Tibet Plateau. Atmosphere. 2018; 9(9):349. https://doi.org/10.3390/atmos9090349
Chicago/Turabian StyleLiu, Weicheng, Qiang Zhang, Zhao Fu, Xiaoyan Chen, and Hong Li. 2018. "Analysis and Estimation of Geographical and Topographic Influencing Factors for Precipitation Distribution over Complex Terrains: A Case of the Northeast Slope of the Qinghai–Tibet Plateau" Atmosphere 9, no. 9: 349. https://doi.org/10.3390/atmos9090349