Russian scientists have introduced an innovative technique to assess how Siberian forests react to global warming by analyzing the reflected blue light from tree annual rings. This method, developed over the past decade, aims to provide a more efficient alternative to traditional methods that measure tree ring density and width. Alberto Arsak, head of the Laboratory for Integrated Studies of Eurasian Forest Dynamics at Siberian Federal University in Krasnoyarsk, emphasized the method's potential for accuracy and applicability across various tree types and large areas. The Russian Arctic is experiencing climate change at a rate much faster than other regions, prompting the need for effective monitoring of tree species' responses to temperature fluctuations. The research team collected wood samples from three larch species in six Siberian regions, measuring annual ring widths and their interaction with blue light. Their findings revealed that the intensity of reflected blue light varies significantly with summer temperatures. This approach allows scientists to track average summer temperature changes and understand the broader impacts of climate change on tree growth in Siberia and the Arctic.