Proceedings of the National Academy of Sciences · 9 September 2026 · From issue 34
Seasonally asymmetric warming reshapes grassland stability across timescales
In Tibetan grasslands, warming only in spring made plant growth steadier across seasons and years.
Chunyan Lu, Huiying Liu et al.
Warming grasslands only in spring made plant growth steadier over time. This held true both within a single growing season and across many years. Warming all year round only helped steadiness within one season, not across years. Summer drought also helped short-term steadiness, but droughts in specific seasons barely changed year-to-year steadiness.
Shows that when warming happens in the year matters more than how much warming occurs.
Two Tibetan grassland field sites only, may not generalize elsewhere.
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