Precipitation regimes have been predicted to shift to more extreme patterns that are characterized by heavy rainfall events and longer dry intervals. Spatiotemporal variation of precipitation extremes may significantly influence the local ecosystem, especially in the arid and semi‐arid regions. This study investigated the variations in extreme precipitation indices across the arid and semi‐arid land of China from 1960 to 2018. Spatial autocorrelation analysis was also conducted to evaluate spatial autocorrelations within the study area. There was generally an increasing trend of precipitation intensity, however, most stations in the low‐altitude semi‐arid regions showed non‐significant trend. The frequency indices generally showed a decreasing trend in consecutive dry days, and an increasing trend in precipitation days in the arid land and high‐altitude semi‐arid regions, suggesting that the arid and high‐altitude semi‐arid regions are becoming wetter. Signals of decreasing precipitation intensity and frequency were still found, such as increasing trends in consecutive dry days in the stations from the low‐altitude semi‐arid regions, implying the possibility of increased drought risk at small spatial scale. The global Moran's I values indicated that the spatial autocorrelation of the trend in the low‐altitude semi‐arid region is high. The local Moran's I showed that the number of stations with wetting trend in the arid region were much higher than that in the semi‐arid regions. These observations imply that the precipitation extremes in the arid and semi‐arid regions of China are becoming more homogeneous. Hence, this study can serve as a useful reference to the policymakers and stakeholders for framing water resource and ecosystem management strategies in arid regions.
Numerous studies have examined China's authoritarian environmentalism, with a focus on policy-making and implementation. We argue that law enforcement should also be investigated as a crucial stage. Specifically, we examine environmental public interest litigation (EPIL) and analyse a novel dataset of 7010 EPIL court judgements from 2015 to 2020. We find that state prosecutors dominate EPIL activities, while the role of non-governmental organisations (NGOs) is strictly limited. We also show great variations in EPIL lawsuits filed by state prosecutors across provinces, indicating high local discretion over environmental law enforcement. Lastly, we doubt whether the great number of EPIL outputs from state prosecutors will produce significant environmental outcomes, because they tend to target low-hanging fruit, in contrast to the more challenging and environmentally profound EPIL cases initiated by NGOs. We highlight the value of using the authoritarian environmentalism framework to contextualise debates surrounding the development of EPIL in China.
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