02 Sep 2022
02 Sep 2022
Status: this preprint is currently under review for the journal CP.

Temporal variations of surface mass balance over the last 5000 years around Dome Fuji, Dronning Maud Land, East Antarctica

Ikumi Oyabu1, Kenji Kawamura1,2,3, Shuji Fujita1,2, Ryo Inoue2, Hideaki Motoyama1,2, Kotaro Fukui4, Motohiro Hirabayashi1, Yu Hoshina5, Naoyuki Kurita6, Fumio Nakazawa1,2, Hiroshi Ohno7, Konosuke Sugiura8, Toshitaka Suzuki9, Shun Tsutaki1,2, Ayako Abe-Ouchi10, Masashi Niwano11, Frédéric Parrenin12, Fuyuki Saito3, and Masakazu Yoshimori10 Ikumi Oyabu et al.
  • 1National Institute of Polar Research, Tokyo 190-8518, Japan
  • 2Department of Polar Science, The Graduate University of Advanced Studies, SOKENDAI, Tokyo 190-8518, Japan
  • 3Japan Agency for Marine Science and Technology, Yokosuka 237-0061, Japan
  • 4Tateyama Caldera Sabo Museum, Toyama, 930-1405, Japan
  • 5The National Museum of Emerging Science and Innovation, Tokyo 135-0064, Japan
  • 6Division of Earth and Environmental Science, Graduate School of Environmental Studies, Nagoya University, Nagoya 464-8601, Japan
  • 7School of Earth, Energy and Environmental Engineering, Kitami Institute of Technology, Kitami 090-8507, Japan
  • 8School of Sustainable Design, University of Toyama, Toyama 930-8555, Japan
  • 9Faculty of Science, Yamagata University, Yamagata 990-8560, Japan
  • 10Atmosphere and Ocean Research Institute, The University of Tokyo, Kashiwa 277-8564, Japan
  • 11Physical Meteorology Research Department, Meteorological Research Institute, Japan Meteorological Agency, Tsukuba, 305-0052, Japan
  • 12Université Grenoble Alpes, CNRS, IRD, Grenoble INP, IGE, 38000 Grenoble, France

Abstract. We reconstructed surface mass balance (SMB) around Dome Fuji, Antarctica, over the last 5000 years using the data from 15 shallow ice cores and 7 snow pits. The depth-age relationships for the ice cores were determined by synchronizing them with a layer-counted ice core from West Antarctica (WAIS Divide ice core) using volcanic signals. The reconstructed SMB records for the last 4000 years show spatial patterns that may be affected by their locations relative to the ice divides around Dome Fuji, proximity to the ocean, and wind direction. The SMB records from the individual ice cores and snow pits were stacked to reconstruct the SMB history in the Dome Fuji area. The stacked record exhibits a long-term decreasing trend at −0.037±0.005 kg m-2 per century over the last 5000 years in the preindustrial period. The decreasing trend may be the result of long-term surface cooling over East Antarctica and the Southern Ocean, and sea-ice expansion in the water vapor source areas. The multidecadal to centennial variations of the Dome Fuji SMB after detrending the record shows four distinct periods during the last millennium: mostly negative period before 1300 C.E., slightly positive for 1300–1450 C.E., slightly negative for 1450–1850 C.E. with a weak maximum around 1600 C.E., and strong increase after 1850 C.E. These variations are consistent with those of previously reconstructed SMB records in the East Antarctic plateau. The low accumulation rate periods tend to coincide with the combination of strong volcanic forcings and solar minima for the last 1000 years, but the correspondence is not clear for the older periods, possibly because of the lack of coincidence of volcanic and solar forcings, or the deterioration of the SMB record due to smaller number of stacked cores.

Ikumi Oyabu et al.

Status: open (until 31 Oct 2022)

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Ikumi Oyabu et al.

Data sets

Accumulation rate, volcanic tie points, ECM, DEP, nssSO4, density and chronology from shallow ice cores around Dome Fuji, East Antarctica Ikumi Oyabu, Kenji Kawamura, Shuji Fujita, Ryo Inoue, Hideaki Motoyama, Kotaro Fukui, Motohiro Hirabayashi, Yu Hoshina, Naoyuki Kurita, Fumio Nakazawa, Hiroshi Ohno, Konosuke Sugiura, Toshitaka Suzuki, Shun Tsutaki, Ayako Abe-Ouchi, Masashi Niwano, Frédéric Parrenin, Fuyuki Saito, Masakazu Yoshimori

Ikumi Oyabu et al.


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Short summary
We reconstructed accumulation rate around Dome Fuji, Antarctica, over the last 5000 years from 15 shallow ice cores and 7 snow pits. We found a long-term decreasing trend in the preindustrial period, which may be associated with secular surface cooling and sea-ice expansion. Centennial-scale variations were also found, which may partly be related to the combinations of volcanic, solar and greenhouse-gas forcings. Most rapid and intense increase of accumulation rate has occurred since 1850 C.E.