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Paleoklimatologia : co nam powie skład izotopowy węgla

Popkiewicz Marcin, Kardaś Aleksandra

LAB Laboratoria, Aparatura, Badania

2020

R. 25, nr 1

37--42

Paleoklimatologia. O co w tym w ogóle chodzi?

Popkiewicz Marcin, Kardaś Aleksandra

LAB Laboratoria, Aparatura, Badania

2019

R. 24, nr 6

34--36

„Kto mierzył koncentracje dwutlenku węgla w atmosferze dwa tysiące lat temu?”, „Skąd znamy temperaturę z czasów, gdy nie było jeszcze termometrów?” - podobne pytania nurtują wielu czytelników Wykopu, Wirtualnej Polski i innych portali. Pomoże na nie odpowiedzieć nasz nowy cykl poświęcony paleoklimatologii, czyli badaniom dawnego klimatu Ziemi.

Long-term summer temperature variations in the Pyrenees from detrended stable carbon isotopes

Esper J., Konter O., Krusic P. J., Saurer M., Holzkämper S., Büntgen U.

Geochronometria

2015

Vol. 42, no.1

53--59

Substantial effort has recently been put into the development of climate reconstructions from tree-ring stable carbon isotopes, though the interpretation of long-term trends retained in such timeseries remains challenging. Here we use detrended δ13C measurements in Pinus uncinata treerings, from the Spanish Pyrenees, to reconstruct decadal variations in summer temperature back to the 13th century. The June-August temperature signal of this reconstruction is attributed using decadally as well as annually resolved, 20th century δ13C data. Results indicate that late 20th century warming has not been unique within the context of the past 750 years. Our reconstruction contains greater amplitude than previous reconstructions derived from traditional tree-ring density data, and describes particularly cool conditions during the late 19th century. Some of these differences, including early warm periods in the 14th and 17th centuries, have been retained via δ13C timeseries detrending — a novel approach in tree-ring stable isotope chronology development. The overall reduced variance in earlier studies points to an underestimation of pre-instrumental summer temperature variability derived from traditional tree-ring parameters.