Legrain E., Tollenaar V., Goderis S., Ardoin L., Blard P. H., Claeys P., Cordero R. R., Debaille V., Fripiat F., Huybrechts P., Imae N., Izeboud M., Pattyn F., Pourkhorsandi Hamed, Seguinot J., Shirai N., Vancappellen M., Van Ginneken M., Wauthy S., Yamaguchi A., Yesiltas M., Zekollari H. (2025). Absence of elevation-dependent warming in Antarctica inferred from blue ice paleoclimate records. Geophysical Research Letters, 52 (9), p. e2024GL113165 [11 p.]. ISSN 0094-8276.
Titre du document
Absence of elevation-dependent warming in Antarctica inferred from blue ice paleoclimate records
Année de publication
2025
Auteurs
Legrain E., Tollenaar V., Goderis S., Ardoin L., Blard P. H., Claeys P., Cordero R. R., Debaille V., Fripiat F., Huybrechts P., Imae N., Izeboud M., Pattyn F., Pourkhorsandi Hamed, Seguinot J., Shirai N., Vancappellen M., Van Ginneken M., Wauthy S., Yamaguchi A., Yesiltas M., Zekollari H.
Source
Geophysical Research Letters, 2025,
52 (9), p. e2024GL113165 [11 p.] ISSN 0094-8276
Reconstructing the past Antarctic climate commonly involves deep drilling of ice cores. However, the similar to 1% of the Antarctic ice sheet surface covered with blue ice also provides unique, yet largely unexploited paleoclimatic opportunities. Here, we analyze 444 ice samples collected in blue ice surfaces located around the S & oslash;r Rondane Mountains. Isotope measurements (delta 18O) on these samples enable us to estimate surface paleotemperatures for both the current interglacial period and the Last Glacial Maximum. Combining these paleotemperatures with the spatially varying source elevation of the sampled blue ice provides new insights on the (lack of) lapse rate evolution (i.e., changes in the elevation-temperature relationship) outside the 40 degrees N-40 degrees S latitudinal band. This result contrasts with low-latitude areas that have experienced elevation-dependent warming (EDW) during this period. Our results hint at a future (lack of) EDW in Antarctica, thereby highlighting the potential of blue ice area paleoclimatic archives to better predict future climatic changes.
Plan de classement
Sciences du milieu [021]
;
Hydrologie [062]
Description Géographique
ANTARCTIQUE
Localisation
Fonds IRD [F B010093511]
Identifiant IRD
fdi:010093511
