Тип публикации: статья из журнала

Год издания: 2014

Идентификатор DOI: 10.1002/eco.1403

Ключевые слова: Atmospheric water vapour, Eastern Siberia, Stable isotope, Taiga, Transpiration, Forestry, Isotopes, Mixing, Moisture, Water recycling, Water vapor, Atmospheric moisture, Atmospheric water, Atmospheric water balance, Horizontal advection, Isotopic composition, Stable isotopes, Evapotranspiration, advection, boreal forest, hydrological cycle, mixing ratio, summer, water budget, Russian Federation, Sakha, Siberia, Yakutsk, Larix

Аннотация: Isotopic composition of atmospheric water vapour (?18OV) was observed at a larch forest near Yakutsk in eastern Siberia during the late summer periods of 2006, 2007 and 2008. The ?18OV [and deuterium excess (d-excess)] values observed in 2006 and 2008 positively (and negatively) correlated with mixing ratio of atmospheric water vapПоказать полностьюour, whereas, in 2007 when soil was extremely wet and resulted in limitation of plant transpiration, neither correlation was found between mixing ratio and ?18OV nor d-excess. Observed results were also compared with components of atmospheric water balance calculated for a 500?500km region; however, neither specific relationship between ?18OV and horizontal advection (direction) nor evapotranspiration was observed. On the other hand, obviously low ?18OV and high d-excess values were found with low mixing ratio after removal of water vapour from the atmosphere because of the process of rainout in 2006 and 2008. Assuming the ?18OV under this condition to be a background, and also assuming the ?18O of sap water in larch trees as transpired water vapour, contribution of transpiration to the atmospheric water vapour was calculated. Fraction of transpired water vapour to the atmospheric water vapour was nearly 0·8 in maximum when plant transpiration was active under warm condition. Our isotope data confirm the importance of recycling of water through transpiration of forest plants in taiga to the hydrologic cycle in eastern Siberia. © 2013 John Wiley & Sons, Ltd.

Журнал: Ecohydrology

Выпуск журнала: Vol. 7, Is. 2

Номера страниц: 197-208

• Ueta A. (Graduate School of Environmental Science, Hokkaido University, Sapporo, Japan, Yokohama Joint Research Center, Isotope Research Institute, Yokohama, Japan)
• Sugimoto A. (Graduate School of Environmental Science, Hokkaido University, Sapporo, Japan, Faculty of Environmental Earth Science, Hokkaido University, Sapporo, Japan)
• Iijima Y. (Research Institute for Global Change, Japan Agency for Marine-Earth Science and Technology, Yokosuka, Japan)
• Yabuki H. (Research Institute for Global Change, Japan Agency for Marine-Earth Science and Technology, Yokosuka, Japan)
• Maximov T.C. (Institute for Biological Problems of Cryolithozone, Siberian Branch of Russian Academy of Science, Yakutsk, Russian Federation, International Center for BioGeoScience Educational and Scientific Training, North-Eastern Federal University, Ya)

• Scopus