Observed data for publication "Sensitivity of recruitment and growth of alpine treeline birch to elevated temperature"

Alpine ecosystems are highly sensitive to global warming, and treeline shifts are a dramatic consequence of climate change. The alpine treelines are rapidly shifting upwards globally. We aimed to better understand what are the global warming effects behind the rapid upward shift of the alpine treeline. Specifically, we ask how climate change affects seedling recruitment and growth sensitivity. We found that summer warming attributed to rapid seedling recruitment beyond the alpine treeline, whereas stem radial growth sensitivity did not change with warming. Thus, the rapid upward migration of the alpine treeline is mainly caused by summer warming, and tree growth at and beyond treeline are likely to increase. The attached is the observed data and codes for figures and results in tables