Variability of Sea-Ice Extent in Baffin Bay over the Last Millennium |
| |
| Authors: | Nancy S Grumet Cameron P Wake Paul A Mayewski Gregory A Zielinski Sallie I Whitlow Roy M Koerner David A Fisher James M Woollett |
| |
| Institution: | (1) Climate Change Research Center, Institute for the Study of Earth, Oceans and Space, University of New Hampshire, Durham, NH, 03824, U.S.A;(2) Geological Survey of Canada, Ottawa, Ontario, K1A 0E8, Canada;(3) Peary MacMillian Arctic Museum, Bowdoin College, Brunswick, ME, 04011, U.S.A |
| |
| Abstract: | Comparison of an ice core glaciochemical time-series developed from thePenny Ice Cap (PIC), Baffin Island and monthly sea-ice extent reveals astatisticallysignificant inverse relationship between changes in Baffin Bay spring sea-iceextent andPenny Ice Cap sea-salt concentrations for the period 1901–1990 AD.Empiricalorthogonal function analysis demonstrates the joint behavior between changesin PICsea-salt concentrations, sea-ice extent, and changes in North Atlanticatmosphericcirculation. Our results suggest that sea-salt concentrations in snowpreserved on thePIC reflect local to regional springtime sea-ice coverage. The PIC sea-saltrecord/sea-ice relationship is further supported by decadal and century scalecomparisonwith other paleoclimate records of eastern Arctic climate change over the last700 years. Our sea-salt record suggests that, while the turn of the century wascharacterized bygenerally milder sea-ice conditions in Baffin Bay, the last few decades ofsea-ice extentlie within Little Ice Age variability and correspond to instrumental recordsof lowertemperatures in the Eastern Canadian Arctic over the past three decades. |
| |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ |
|
