Kein Folientitel

1
Dr. Volker RacholdAlfred Wegener InstituteM.S.
and PhD, Geochemistry (Goettingen, 1991,
1994)Research Interests Coastal and
Offshore Permafrost  Nutrient and Carbon
Cycles  Sedimentation Processes  River
Geochemistry Arctic Land-Ocean Interactions
2
The Role of Coastal Processes in the Arctic System
Arctic Forum Washington DC 13-14 May 2004
Volker Rachold, AWI
3
Processes

• Sediment transport by waves, currents and ice
• Permafrost degradation

• Erosion and accretion
• Thaw consolidation

Coastal responses

• Hydrodynamic system
• Atmospheric system

Environmental forcing

• GHG
• Organic carbon
• Bathymetry and morphology

Impacts

• Human systems
• Biology and ecosystems

Feedback
Arctic Forum Washington DC 13-14 May 2004
Volker Rachold, AWI
4
Coastal Dynamics as a function of environmental
forcing and coastal geology and morphology
Arctic Forum Washington DC 13-14 May 2004
Volker Rachold, AWI
5
Terrigenous Organic Carbon Input to the Arctic
Ocean
Rachold, Eicken, Gordeev, Grigoriev, Hubberten,
Lisitzin, Shevchenko and Schirrmeister (2003)
Arctic Forum Washington DC 13-14 May 2004
Volker Rachold, AWI
6
Current Status of the Arctic Coastal Dynamics
(ACD) Coastal Segmentation and Classification
(prototype GIS with completed segmentation is
anticipated by October 2004)
Coastal Subdivisions by Arctic Shelf Seas
based on World Vector Shorelines, excluding
islands
Arctic Forum Washington DC 13-14 May 2004
Volker Rachold, AWI
7
ACD Coastal Classification Template
Arctic Science Summit Week Reykjavik, Island
April 2004
Arctic Forum Washington DC 13-14 May 2004
Jerry Brown, Volker Rachold and the ACD Group
Volker Rachold, AWI
8
ACD Coastal Classification Template (2)
Arctic Forum Washington DC 13-14 May 2004
Volker Rachold, AWI
9
Jorgenson and Brown (in press)
Arctic Forum Washington DC 13-14 May 2004
Volker Rachold, AWI
10
Jorgenson and Brown (in press)
Arctic Forum Washington DC 13-14 May 2004
Volker Rachold, AWI
11
Jorgenson and Brown (in press)
Arctic Forum Washington DC 13-14 May 2004
Volker Rachold, AWI
12
Jorgenson and Brown (in press)
Arctic Forum Washington DC 13-14 May 2004
Volker Rachold, AWI
13
Sampling for organic geochemical analyses in the
Laptev Sea
Arctic Forum Washington DC 13-14 May 2004
Volker Rachold, AWI
14
Net coastal change in the Canadian Beaufort Sea
from 1972 to 2000 overlain on a Landsat image
mosaic 1998-1999 (provided by Environment
Canada).
Solomon (in press)
Arctic Forum Washington DC 13-14 May 2004
Volker Rachold, AWI
15
Amount of shoreline retreat between 1987 and 2000
at Varandei settlement (Barents Sea)
Ogorodov (in press)
Arctic Forum Washington DC 13-14 May 2004
Volker Rachold, AWI
16
Analyses of Environmental Data Storm counts
3
2
4
1
5
7
6
Atkinson (in press)
Arctic Forum Washington DC 13-14 May 2004
Volker Rachold, AWI
17
Monitoring of coastal retreat rates at the key
site Marre Sale (Kara Sea)
Vasiliev, Kanevskiy, Cherkashov and Vanshtein
(in press)
Arctic Forum Washington DC 13-14 May 2004
Volker Rachold, AWI
18
Model of the sub-sea permafrost table relief at
the Marre Sale key site (Kara Sea)
Rekant, Cherkashov, Vanshtein and Krynitsky (in
press)
Arctic Forum Washington DC 13-14 May 2004
Volker Rachold, AWI
19
Transition of Onshore to Offshore Permafrost in
the Arctic Coastal Zone
Concept of a Coastal Drilling Program in the
Western Laptev Sea German-Russian Expedition
COAST 1 (Rachold, 2003)
Arctic Forum Washington DC 13-14 May 2004
Volker Rachold, AWI
20
Coastal Permafrost Drilling Profile at
Mammontovy Klyk (Western Laptev Sea) Pilot
Study by M.N. Grigoriev, April 2003
Arctic Forum Washington DC 13-14 May 2004
Volker Rachold, AWI
21
Schematic map of relic offshore ice bearing
permafrost thickness on the East Siberian Arctic
Shelf (Simulation for geothermal heat flux of 45
mW/m2)
Romanovskii, Hubberten, Gavrilov, Eliseeva and
Tipenko (in press)
Ice bearing permafrost thickness m 1-
discontinuous, 100 and less 2- 100-200 3- 200-
300 4- 300-400 5- 400-600
6- 100-600 in rifts with open taliks 7- open
taliks following large tectonic
fractures 8-coastal permafrost thickness 9-
Arctic Shelf boundary
Arctic Forum Washington DC 13-14 May 2004
Volker Rachold, AWI
22
ACD Products
http//www.awi-potsdam.de/www-pot/geo/acd.html)
Circum-Arctic Coastal Photo Collection
Metadata Information for key sites
Bibliography of Russian Literature
Arctic Forum Washington DC 13-14 May 2004
Volker Rachold, AWI
23
ACD Publications
Arctic Forum Washington DC 13-14 May 2004
Volker Rachold, AWI
24
ACD Publications (2)
Arctic Coastal Dynamics Special Issue of
GeoMarine Letters
V. Rachold, F. Are, J. Brown, G. Cherkashov, M.
N. Grigoriev, H.-W. Hubberten, J.L. Sollid and S.
Solomon - Preface and overview of the
IASC/IPA-Project Arctic Coastal Dynamics (ACD) F.
E. Are, M. N. Grigoriev, H.-W. Hubberten and V.
Rachold - Using thermoterrace dimensions to
calculate the coastal erosion rate D. E.
Atkinson - Environmental forcing of the
circum-Polar coastal regime D. Drozdov and F.
Rivkin - A Geo-Information System (GIS) to
display and analyze coastal dynamics of the
Russian Arctic T. Jorgenson and J. Brown - The
U.S. Beaufort Sea coast regional classification
and estimation of sediment and carbon inputs from
erosion G.K. Manson, S.M. Solomon, D.L. Forbes,
D.E. Atkinson, and M. Craymer - Spatial
Variability Of Factors Influencing Coastal Change
In The Western Canadian Arctic S. L. Nikiforov,
Yu. A. Pavlidis, V. Rachold, N. A. Aibulatov, M.
N. Grigoryev, F. M. Rivkin, N.V.Ivanova and
M.M.Koreisha - Morphogenetic classification of
Arctic coasts S. A. Ogorodov - Coastal dynamics
in the Pechora Sea under human impact S. A.
Ogorodov, A. M. Kamalov, G. K. Zubakin and Yu. P.
Gudoshnikov - The role of sea ice in coastal and
bottom dynamics in the Pechora Sea V. Ostroumov,
V. Rachold and Sorokovikov - Coastal erosion
sediment and organic carbon input to the East
Siberian Sea N. Romanovkii, H.-W. Hubberten, A.
Gavrilov, V. Tumskoy and V. Romanovsky -Recent
Offshore Permafrost State and Processes of the
East Siberian Arctic Shelf A. Sharov - Studying
changes of ice coasts in the Russian Arctic A.
Vasiliev, M. Kanevskiy, G Cherkashov and B.
Vanshtein -Permafrost and coastal dynamics at the
Barents and Kara Sea key sites S. Solomon -
Spatial and temporal variability of shoreline
change in the Beaufort-Mackenzie region,
Northwest Territories, Canada B. Vanshtein, G.
Cherkashov, P. Rekant and P. Krinitsky -
Permafrost characteristics and dynamics of the
southern part of Kara Sea coastal zone
coming soon...
Arctic Forum Washington DC 13-14 May 2004
Volker Rachold, AWI
25
Integration of Geophysical and Biological Studies
Arctic Forum Washington DC 13-14 May 2004
Volker Rachold, AWI
26
Arctic Coastal Biodiversity Assessment
Arctic Forum Washington DC 13-14 May 2004
Volker Rachold, AWI
27
Near-future Activities

• Arctic Coastal Biodiversity (ACBio)
  Development of a Science and Implementation
  Planfor a new IASC project
• 5th Arctic Coastal Dynamics (ACD) Workshop
  Montreal (Canada), 13-16 October 2004
• 2004 AGU Fall Meeting Special Session on
  Arctic Permafrost Coasts
• International Conference on Arctic Planning
  (ICARP II) - Copenhagen (Denmark), Autumn 2005
  Coastal Working Group Theme

Arctic Forum Washington DC 13-14 May 2004
Volker Rachold, AWI
28
Arctic Forum Washington DC 13-14 May 2004
Volker Rachold, AWI
Acknowledgements

• Financial support by the following organizations
  is highly appreciated
• International Arctic Sciences Committee (IASC)
• International Permafrost Association (IPA)
• Canadian Department of Foreign Affairs and
  International Trade (DFAIT) Canada-Germany
  agreement
• INTAS (International Association for the
  promotion of co-operation with scientists from
  the New Independent States of the former Soviet
  Union) project numbers INTAS Open Call 2001-2329
  and INTAS Open Call 2001-2332
• International Arctic Research Center (IARC)
  grant Analysis of Coastal Meteorological and
  Oceanographic Forcing in the Arctic Basin
• German Ministry for Education and Research /
  Russian Ministry for Research and Technology
  grant Permafrost Dynamics in the Laptev Sea