Full
YU Yang, engineer, majors in GNSS meteorology, E-mail: yuyang718@foxmail.com
Outline
Based on the observation data of ground-based GNSS network in Hubei province during 25 June to 9 July 2020 and in Henan province during 13 to 26 July 2021, the precipitable water vapor(PWV) are derived. Combined with hourly precipitation data of ground automatic weather stations, we analyze the spatio-temporal characteristics of PWV and its influence on precipitation in "Violent Meiyu" in 2020 and Henan "7·20" extreme rainstorm in 2021. The results show that the regions with high PWV value above 65 mm have a good indication of the areas where rainstorms happen. PWV increases in a fluctuating tendency before the arrival of rainstorm, the precipitation intensity and PWV reach the maximum value almost at the same time. During the process of "7·20" extreme rainstorm in 2021, the water vapor is sufficient throughout Henan province, the indication of PWV high value for rainstorm is relatively weak. In general, PWV shows a trend of slow increase and fast decrease in "7·20" extreme rainstorm. Before the occurrence of precipitation, PWV fluctuates at a high level and grows slowly. When PWV rapidly decreases, precipitation stops. Furthermore, it is also revealed that PWV usually increases 1 to 2 hours before the occurrence of rainstorm both in 2020 and 2021, which is significant for rainstorm monitoring and weather forecasting.
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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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