China News Thread

Wrought

Wrought

Captain
Registered Member
Paper examining recent increases in moisture in the northwest concludes that it's mostly driven by local evaporation, not external precipitation. Rising temperatures due to climate change contributed. In short, the desert is getting more humid (though it may not last).

Over recent decades, Northwest China (NWC) has experienced significant precipitation enhancements under global warming. However, the moisture sources and mechanisms of the increased precipitation remain controversial, a critical issue for projecting the persistence of the humidification trend. Previous studies have generally attributed the increased precipitation to enhanced external moisture transport. Using the dynamic precipitation recycling model (DRM) combined with dynamic circulation diagnostic methods, this study systematically examined the physical mechanisms of summer precipitation changes in NWC during 1961–2020. The results reveal a precipitation trend shift that occurred around 1997, followed by a significant, 9.18% increase in precipitation after 1997. Although external moisture transport remains the dominant source of climatological precipitation, the decadal increase has been governed by local evapotranspiration, whose growth outpaced net external inflow changes.

This change was primarily modulated by zonal planetary waves driven by the Atlantic Multidecadal Oscillation (AMO), placing NWC under anomalous ascent and moisture convergence. During 1998–2020, the AMO-induced circulation simultaneously reduced eastward moisture export from NWC and favored local recycling by enhancing evapotranspiration (+9.12%) and recycled precipitation (+10.51%). Temperature-induced cryospheric melt and vegetation recovery amplified the local evapotranspiration, allowing the recycled moisture component to become the primary contributor to the precipitation increase (78%), surpassing the contribution from advected moisture (22%). Despite recent wetting, water budget constraints acting in conjunction with a likely AMO phase transition imply that the humidification may not persist in the future.
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Bellum_Romanum

Bellum_Romanum

Brigadier
Registered Member
GulfLander said:
some douyin accounts seem posting concerns about alleged suspicious group of people w backpacks walking in line and covered faces in some areas in CN.
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some other douyin concerns
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Just have them be reported to the authorities for observation and monitoring to ensure these folks are nothing but cultist nutjobs and nothing more.
 
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