Тип публикации: статья из журнала

Год издания: 2017

Идентификатор DOI: 10.1002/2016JG003745

Ключевые слова: boreal forest, carbon isotope, circumpolar, climate change, dynamic global vegetation model, tree-ring width

Аннотация: We describe the physiological responses of boreal conifers to climate change for the past 112 years using ring-width and carbon isotope ratio (δ13C) chronologies at six forest sites in northern Eurasia and Canada. Responses differed among regions, depending on their climatic and/or geographic characteristics. Tree radial growth decПоказать полностьюreased over the past 52 years in central eastern Siberia with the higher rate of summer temperature increase than other regions, as indicated by the negative correlation between radial growth and summer temperature, but increased in northern Europe and Canada. Changes in tree-ring δ13C indicated that recent climatic conditions have induced stronger drought stress for trees from central eastern Siberia than for those from other regions. The observed tree growth trends were compared to those simulated using a dynamic global vegetation model. Although the modeled annual net primary production (NPP) for trees generally exhibited similar decadal variation to radial growth, simulations did not show a recent decrease in tree growth, even in central eastern Siberia. This was probably due to an overestimation of the sensitivity of modeled tree NPP to precipitation. Our results suggest that the tree NPP forecasted under the expected future increases in temperature and average precipitation might be overestimated, especially in severely dry regions such as central eastern Siberia. ©2017. American Geophysical Union. All Rights Reserved.

Журнал: Journal of Geophysical Research: Biogeosciences

Выпуск журнала: Vol. 122, Is. 11

Номера страниц: 2786-2803

ISSN журнала: 21698953

Издатель: Blackwell Publishing Ltd

• Tei S. (Faculty of Environmental Earth Science, Hokkaido University, Sapporo, Japan, National Institute of Polar Research, Tachikawa, Japan, Arctic Research Center, Hokkaido University, Sapporo, Japan)
• Sugimoto A. (Faculty of Environmental Earth Science, Hokkaido University, Sapporo, Japan, Arctic Research Center, Hokkaido University, Sapporo, Japan)
• Liang M. (College of Horticulture and Gardening, Yangtze University, Jingzhou, China)
• Yonenobu H. (College of Education, Naruto University of Education, Naruto, Japan)
• Matsuura Y. (Forestry and Forest Products Research Institute, Tsukuba, Japan)
• Osawa A. (Graduate School of Global Environmental Studies, Kyoto University, Kyoto, Japan)
• Sato H. (Institute of Arctic Climate and Environment Research, Japan Agency for Marine-Earth Science and Technology, Yokohama, Japan)
• Fujinuma J. (Graduate School of Environmental Science, Hokkaido University, Sapporo, Japan)
• Maximov T. (Institute for Biological Problem of Cryolithozone, Siberian Division of Russian Academy of Science, Yakutsk, Russian Federation, North-Eastern Federal University, Yakutsk, Russian Federation)

• Scopus