Тип публикации: статья из журнала
Год издания: 2010
Идентификатор DOI: 10.1111/j.1365-2486.2009.02008.x
Ключевые слова: climate change, delta 13C and delta 18O of wood and cellulose, Greenland ice core, late wood density, North Atlantic Oscillation, northern Finland, permafrost, Siberian north (Russia), spatial patterns, tree-ring width, ?13C and ?18O of wood and cellulose, dendrochronology, ice core, spatial analysis, stable isotope, tree ring, Finland, Siberia, Larix
Аннотация: A spatial description of climatic changes along circumpolar regions is presented based on larch tree-ring width (TRW) index, latewood density (MXD), delta 13C, delta 18O of whole wood and cellulose chronologies from eastern Taimyr (TAY) and north-eastern Yakutia (YAK), Russia, for the period 1900-2006, in comparison with a delta 13C cellulose chronology from Finland (FIN) and a delta 18O ice core record from Greenland (GISP2). Correlation analysis showed a strong positive relationships between TRW, MXD, stable isotope chronologies and June, July air temperatures for TAY and YAK, while the precipitation signal was reflected differently in tree-ring parameters and stable isotope data for the studied sites. Negative correlations were found between July, August precipitation from TAY and stable isotopes and MXD, while May, July precipitations are reflected in MXD and stable isotopes for the YAK. No significant relationships were found between TRW and precipitation for TAY and YAK. The areas of significant correlations between July gridded temperatures and TRW, MXD and stable isotopes show widespread dimension from east to west for YAK and from north to south for TAY. The climate signal is stronger expressed in whole wood than in cellulose for both Siberian regions. The comparison analysis between delta 13C cellulose chronologies from FIN and TAY revealed a similar declining trend over recent decades, which could be explained by the physiological effect of the increasing atmospheric CO(2). TRW, MXD and delta 13C chronologies from TAY and YAK show a negative correlation with North Atlantic Oscillation index, while the delta 18O chronologies show positive correlations, confirming recent warming trend at high latitudes. The strong correlation between GISP2 and delta 18O of cellulose from YAK chronologies reflects the large-scale climatic signal connected by atmospheric circulation patterns expressed by precipitation.
Журнал: GLOBAL CHANGE BIOLOGY
Выпуск журнала: Vol. 16, Is. 3
Номера страниц: 1003-1018
ISSN журнала: 13541013
Место издания: MALDEN
Издатель: WILEY-BLACKWELL PUBLISHING, INC
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