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Outline
To investigate the three-dimensional spatiotemporal propagation characteristics of meteorological drought, based on the CN05.1 gridded data and standardized precipitation index (SPI) during the period 1961-2021 in China, a spatiotemporally continuous event identification method and hierarchical clustering algorithms were applied to classify different propagation patterns of spatiotemporally continuous meteorological droughts and analyze their characteristics. The changing characteristics of events in future climate scenarios were discussed. The results indicate that the spatiotemporal continuous meteorological drought events distribute widely with significant variations in their movement distances, ranging from localized areas to nearly half of China. Three propagation patterns are identified based on movement distance and direction. The Type 1 and Type 2 events are characterized by long duration and large affected areas but occurring less frequently. The Type 3 events occur more frequently, have shorter durations, and affect smaller areas. Under future scenarios, the total number of spatiotemporally continuous drought events is projected to increase, while their duration and intensity are expected to decrease. Both the maximum and total affected areas are likely to expand.
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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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