Spatial patterns of climatic changes in the Eurasian north reflected in Siberian larch tree‐ring parameters and stable isotopes

• Published in: Global Change Biology
• Main Authors: SIDOROVA, OLGA V., SIEGWOLF, ROLF T. W., SAURER, MATTHIAS, NAURZBAEV, MUKHTAR M., SHASHKIN, ALEXANDER V., VAGANOV, EUGENE A.
• Format: Article in Journal/Newspaper
• Language: English
• Published: Wiley 2010
• Subjects: Greenland; ice core; North Atlantic; North Atlantic oscillation; Taimyr; Yakutia
• Online Access: http://dx.doi.org/10.1111/j.1365-2486.2009.02008.x; https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1365-2486.2009.02008.x; https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1365-2486.2009.02008.x

Abstract A spatial description of climatic changes along circumpolar regions is presented based on larch tree‐ring width (TRW) index, latewood density (MXD), δ 13 C, δ 18 O 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 δ 13 C cellulose chronology from Finland (FIN) and a δ 18 O 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 δ 13 C 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 δ 13 C chronologies from TAY and YAK show a negative correlation with North Atlantic Oscillation index, while the δ 18 O chronologies show positive correlations, confirming recent warming trend at high latitudes. The strong correlation between GISP2 and δ 18 O of cellulose from YAK chronologies reflects the large‐scale climatic signal connected by atmospheric circulation patterns expressed by precipitation.