Physical Changes in the Arctic Kim Holmn International Director - PowerPoint PPT Presentation

Feb 25, 2023 •121 likes •348 views

Physical Changes in the Arctic Kim Holmn International Director Norwegian Polar Institute holmen@npolar.no Svalbard: Norwegian Arctic -13.1 Sv 11.5 Sv 1.6 Sv Kim Holmn. page 3 page 4 Kim Holmn. Climate Research Unit, University

Physical Changes in the Arctic Kim Holmén International Director Norwegian Polar Institute holmen@npolar.no
Svalbard: Norwegian Arctic
-13.1 Sv 11.5 Sv 1.6 Sv Kim Holmén. page 3
page 4 Kim Holmén.
Climate Research Unit, University of East Anglia http://www.cru.uea.ac.uk/cru/info/warming/ Kim Holmén. page 5
http://data.giss.nasa.gov/gistemp/animations/ Kim Holmén. page 6
Geographical pattern of surface warming Projected surface temperature changes for the late 21st century (2090-2099). The map shows the multi-AOGCM average projection for the A1B SRES scenario. All temperatures are relative to the period 1980-1999. Kim Holmén. page 7
Summed mass balance ≈ volume change •Small glaciers BRG and MLB steadily retreating, accelerated 2001-2007 •More negative balances after 2000 lead to net loss since 1986 for KNG •KRB-HDF surface mass balance similar to KNG •When calving and front retreat is added, KRB-HDF considerably more negative than all other glaciers Jack Kohler, NPI
Sea surface temperature yr.no December 8, 2014 Kim Holmén. page 11
What is changing in the Arctic Sea Ice System? • Ice extent • Ice dynamics and distribution Sea ice thickness • Arctic report card 2012/NSIDC Trend per decade: ‐ 13.7% NSIDC See also Arctic Report Card 2013, NOAA Univ. Bremen
What is changing in the Fram Tara (IPY, 2006 ‐ 08) (1893 ‐ 96) Arctic Sea Ice System? • Ice extent • Ice dynamics and distribution Sea ice thickness • Photo: NPI archive Photo: M. Nicolaus Maslanik & Tschudi, Arctic report card 2012
What is changing in the Hopen max. seas. ice thickness ( drillings) Arctic Sea Ice System? • Ice extent • Ice dynamics and distribution Sea ice thickness • Gerland et al. 2008 GRL Ice thickness transpolar drift (EM) Fram Strait ice thickness (ULS) Haas et al. 2008 GRL Hansen et al. 2013 JGR
http://www.climate.gov/news-features/videos/very-little-old-sea-ice-remains-arctic
Photo: Ann-Christine Engvall
WALRUS Thanks for your attention ! Thanks for your attention ! Svalbard: Norwegian Arctic Photo: Kit Kovacs and Christian Lydersen Thanks for your attention !
IPCC, 2013 page 19 Kim Holmén.
IPCC, 2013 page 20 Kim Holmén.
IPCC, 2013 page 22 Kim Holmén.

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