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| Titel |
Relationship between climate and stable isotope ratios in tree rings and its temporal stability |
| VerfasserIn |
Sławomira Pawełczyk, Tatjana Boettger, Marika Haupt, Marek Krąpiec, Anna Pazdur, Elżbieta Szychowska-Krąpiec, Malgorzata Szymaszek |
| Konferenz |
EGU General Assembly 2010
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 12 (2010) |
| Datensatznummer |
250037785
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| Zusammenfassung |
| Tree rings can be used as archives of climatic and environmental data with annual
resolution.
Investigations of stable isotopic C, H, and O compositions in α-cellulose extracted from
tree rings of pines (Pinus sylvestris L.) growing in the ecologically clean Suwalki Region (54Ë
06 ’N, 22Ë 57’E), North Eastern part of Poland, were undertaken. Climatically, the Suwalki
Region substantially differs from other regions of Poland. It is the coldest part of Poland apart
from mountains. The instrumental meteorological data used for the investigation date back to
1931, in case of temperature and precipitation, and to 1954, in case of humidity and
insolation. Presented isotope records cover the period of 1900-2003. Those measurements
constitute a part of the record used for more complex investigations of stable isotopic
composition in tree rings for this region of Poland for last 400 years in the frame of European
project ISONET.
Values of δ13C were corrected due to changes of atmospheric CO2 since industrialization.
After making the correction, a strange behavior of δ13C was observed, especially since 1985
year. For that time almost all values are above the mean value of δ13C calculated for the
period of 1900-2003.
Autocorrelation function estimates for isotope chronology of δ13C and CO2atm
corrected δ13C, δ18O and δ2H were determined. It can be concluded that isotope
chronologies are not fully random and they exhibit significant deterministic components.
Relationships between isotope values of tree rings and monthly climate data (temperature,
sum of precipitation, mean humidity and insolation) were modeled using bootstrapped
correlation function in DendroClim2002. Relations between isotopic and meteorological data
demonstrate that precipitation influences the stable isotopic carbon, oxygen and hydrogen
ratios to a lower extend than temperature. Considering all investigated elements, the
hydrogen exhibits the highest correlation with the mean July temperature (r=0.57, n=73,
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