Full
LI Kai, postgraduate, majors in GNSS meteorology, E-mail: 2213021026@post.usts.edu.cn
Outline
Based on the data of 56 sounding stations in China from 2009 to 2019, we analyze the correlation between precipitable water vapor(PWV) and zenith tropospheric delay(ZTD), water vapor pressure (Es), atmospheric pressure (Ps), surface temperature (Ts), and weighted mean temperature (Tm), and then construct the China PWV models using multiple linear regression (MLR), random forest (RF), multilayer perceptron (MLP), and MLP-RF integration algorithm. The accuracy of these models are evaluated. The results show that the correlation coefficients between PWV and Ts, Ps, Es, Tm and ZTD are 0.78, -0.71, 0.77, 0.74 and 0.99, respectively. The average RMSE of yearly PWV models based on MLR, RF, MLP and MLP-RF are 1.25 mm, 0.44 mm, 0.28 mm, and 0.21 mm, and the average MAE are 0.98 mm, 0.31 mm, 0.18 mm, and 0.14 mm, respectively. The average RMSE of seasonal MLR, RF, MLP, and MLP-RF PWV models are 0.60 mm, 0.45 mm, 0.29 mm, and 0.21 mm, and the MAE are 0.49 mm, 0.33 mm, 0.19 mm, and 0.14 mm, respectively. The yearly MLP-RF PWV model is with the highest accuracy, which is suitable for real time PWV acquisition and research in China region.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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