As atmospheric carbon dioxide (CO2) increases and the Arctic warms, vegetation responds, and satellite measures indicate extensive greening at high latitudes. However, the underlying causes of so-called Arctic greening are complex and scale-dependent. To achieve a consensus perspective on Arctic greening, advanced observational tools are required. Emerging hyperspectral sensors that capture solar-induced fluorescence (SIF), a proxy of photosynthesis, will provide new insights into vegetation research. By combining SIF estimates and information related to the leaf pigments through the photochemical reflectance index (PRI), we can better constrain our current knowledge of arctic vegetation status(stress). ArcticSIF aims to generate an unprecedented satellite-derived vegetation monitoring system that exploits information on the diurnal dynamics, accurately tracking the arctic vegetation photosynthetic response and assessing the Artic carbon cycle through ecosystem models.

2023

2027