Percorrer por autor "Song, Jing"
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- Global microplastic fiber pollution from domestic laundryPublication . Wang, Chunhui; Song, Jing; Nunes, Luís; Zhao, Hongting; Wang, Peng; Liang, Zhirong; Arp, Hans Peter H.; Li, Gang; Xing, BaoshanThe rapid expansion of fast fashion has significantly increased microplastic fiber (MPF) release during laundry practices, accounting for approximately one-third of primary microplastics entering the ocean. Currently, a significant gap exists in global-scale research on the release of MPFs from washing textiles. This study introduces an innovative empirical model to assess the spatial distribution of MPF emissions. The model estimates an annual global emission of 5.69 million tons of MPFs from laundry. Of this total, machine washing accounts for the majority (93.7 %), with hand washing contributing the remaining 6.3 %. As the primary source of MPF pollution, Asia's ' s emissions reach 3.71 million tons, far exceeding those of North America (1.18 million tons) and Europe (0.45 million tons). The primary issue is that wastewater management efficiency varies significantly worldwide. In Asia, there is persistently high discharge of MPFs into natural waters, and the removal efficiency of wastewater treatment plants is still comparatively low. In contrast, the United States and many European countries exhibit better MPF retention. The global nature of this challenge mandates international collaboration for comprehensive environmental conservation. Our study provides the first high-resolution global distribution map of MPF emissions and discharge into natural waters, establishing a data foundation for global and regional management of microplastics originating from household laundry sources.
- The historical distribution and future expansion of paddy rice fields in Asian highlandsPublication . Song, Jing; Wang, Chunhui; Nunes, Luís; Liang, Zhongyao; Li, GangUrbanization and population growth are shrinking lowland rice areas, compelling exploration of Asia’s under studied highlands for future food security. Using earth observation data from 2000 to 2020 and machine learning method, we analyzed the distribution of paddy (irrigated) rice fields and their driving factors in Asian highlands (>1000 ma.s.l.). Highlands currently host 1.489 ± 0.176 millionha of rice, concentrated in the Tianshan–Tarim Basin, Hetao Plain along the Yellow River, and Yunnan–Guizhou Plateau. Altitude is the dominant constraint; additional precipitation is associated with reduced rice extent in the highlands, whereas population density and economic growth are associated with expansion. Our scenario modelling projects ~60% expansion and northward shift of high altitude paddies by 2035, yielding more nutrient rich, low contaminant grain and aiding saline–alkali reclamation. These findings highlight substantial, climate resilient capacity in Asian uplands to bolster sustainable rice supply and regional food security. This integrated assessment fills a critical knowledge gap regarding high elevation agroecosystems.