PI: Andrey PROSHUTINSKY, Woods Hole Oceanographic Institution, USA
Co-Principal Investigators:
Ruediger GERDES, AWI, Germany
Sirpa HAKKINEN, GSFC/NASA, USA
David HOLLAND, NYU, USA
Greg HOLLOWAY, IOS, Canada
Mark JOHNSON, IMS/UAF, USA
Michael KARCHER, AWI, Germany
Wieslaw MASLOWSKI, NPS, USA
Michael STEELE, PSC/UW, USA
Jia WANG, IARC/UAF, USA
Co-Investigators:
Helge DRANGE, NERSC, Norway
William HIBLER, IARC, USA
Marika HOLLAND, NCAR, USA
Elizabeth HUNKE, LANL, USA
Hugues GOOSSE, LLN, Belgium
Elena GOLOUBEVA, ICMMG, Russia
Cornelia KOEBERLE, AWI, Germany
Alexander MAKSHTAS, IARC/UAF, USA
Mathew MALTRUD, LANL, USA
Miguel MAQUEDA, NYU, USA
Gennady PLATOV, ICMMG, Russia
Albert SEMTNER, NPS, USA
Petteri UOTILA, NYU, USA
Nikolai YAKOVLEV, RAS, Russia
Jinlun ZHANG, PSC/UW, USA
The main AOMIP objectives for 2004 are:
- to complete a coordinated set of model runs
for 1948-2004 under standard forcing, described in detail at
http://fish.cims.nyu.edu/project_aomip/overview.html
- identify and analyze differences among models, and
- determine the best model runs for specific purposes related
to the investigation of the major AOMIP scientific themes covering
the variability of the Arctic Ocean climate, namely: circulation of
Atlantic waters; freshwater accumulation and release mechanisms;
sea ice thickness, and sea-ice volume variability.
Coordinated Analysis Experiment:
During March-May, 2004, the AOMIP team is carrying out a coordinated
analysis experiment in order to simulate Arctic sea ice and ocean
conditions over the period 1948-2004.
Eleven (mostly regional) coupled ice-ocean models are used in this
experiment, namely:
AWI: Alfred Wegener Institute, Germany
(two models with, one high- and one low-spatial resolution);
GSFC: NASA Goddard Space Flight Center, USA;
IARC: International Arctic Research Center, USA;
ICMMG: Russian Academy of Science, Novosibirsk; and
IOS: Institute of Ocean Science, Canada;
LANL: Los Alamos Laboratory, USA
(high-resolution global model);
LLN: Louvain La Neuve, Belgium
(global model);
NPS: Naval Postgraduate School, USA;
NYU: New York University, USA
(two models, one isopycnal, and one z-coordinate);
RAS: Russian Academy of Science, Moscow;
UW: University of Washington.
All models use identical initial conditions, basic parameters,
and forcing fields. Partial model results (because not all models
have completed experiment by this date) are collected at the
New York University AOMIP-LAS (Live Access Server), i.e. data archive.
(See http://maud.cims.nyu.edu:8080/las_aomip/servlets/dataset ).
This cyber infrastructure allows for efficient model-data exchange
among AOMIP participants. As well, the AOMIP common-forcing data
sets, archived at the AOMIP web site, are available through the
AOMIP-LAS. Monthly mean data have been stored and include:
- T and S at all model levels;
- U, V for water
(at all model levels);
- U, V for ice;
- ice thickness;
- ice concentration;
- stream function;
- sea surface height;
- ocean surface salt and heat fluxes;
- vertically integrated FW content
(relative to 34.8);
- vertically integrated heat
(relative 0ºC potential temperature).
Results of the AOMIP investigations based on individual
process studies and covering the AOMIP scientific themes
are reflected in AOMIP papers published or accepted in late
2003 or in 2004 and are listed below.
A considerable amount of AOMIP time was dedicated to the organization
of the 7th AOMIP workshop. That workshop will take place during
June 14-15, 2004, at GFDL and is timed to precede the CLIVAR
Workshop: Evaluating the Ocean Component of IPCC-Class Models (June
16-18).
Day 1 of the workshop will involve a comprehensive
discussion of results from the Coordinated Analysis 1948-2004.
Day 2 will be dedicated to a discussion of various topics:
model calibration and validation approach;
model improvement plan;
collaboration and coordination of our activity with other MIPs;
some internal problems including:
project coordination,
funding opportunities,
research themes,
publications.
Scientists from other MIPs will attend our workshop
in order to exchange international experience in model improvements
and intercomparison studies. We expect fruitful discussions
which will significantly enhance our project.
Publications:
Published in 2004
Dukhovskoy, D. S., M. A. Johnson, and A. Proshutinsky (2004), Arctic
decadal variability: An auto-oscillatory system of heat and fresh
water exchange, Geophys. Res. Lett.,31, L03302,
doi:10.1029/2003GL019023.
Gerdes, R., Hurka, J., Karcher, M., Kauker, F., Koeberle, C.(2004).
Simulated history of convection in the Greenland and Labrador seas
1948-2001, AGU monograph Climate Variability of the Nordic Seas,
Bjerknes Centre for Climate Research, Bergen, Norway, accepted..
Goosse H., R. Gerdes, F. Kauker and C. Koeberle, 2004: Influence of
the exchanges between the Atlantic and the Arctic on sea-ice volume
variations during the period 1948-1997. Journal of Climate,
17 (3) 1294-1305.
Hakkinen, S., A. Proshutinsky (2004), Freshwater content variability
in the Arctic Ocean, J. Geophys. Res., 109, C03051,
doi:10.1029/2003JC0011940.
Hu, Z.-Z., S. Kuzimina, L. Bengtsson, and D.M. Holland, 2004: Mean and
uncertainty of Arctic sea-ice change and their connection with Arctic
climate change in CMIP2 simulations. (Accepted J. Geophys. Res. -
Atmosphere).
Karcher, M. J., Harms, I. H.(2004). Arctic Ocean Shelf-Basin
Interaction, Proceedings of the Arctic Climate Impact Assessment
(ACIA) workshop on Arctic Climate Feedback Mechanisms, 17 -19
November, Tromsø, Reports of the Norwegian Polar Institute, Tromsø,
Norway, in press..
Karcher, M. J., Gerland, S., Harms, I., Iosjpe, M., Heldal, H.,
Kershaw, P. J., Sickel, M.(2004). The dispersion of technetium-99 in
the Nordic Seas and the Arctic Ocean: a comparison of model results
and observations, Journal of environmental radioactivity, in press.
Maslowski, W., D. Marble, W. Walczowski, U. Schauer, J. L. Clement,
and A. J. Semtner (2004), On climatological mass, heat, and salt
transports through the Barents Sea and Fram Strait from a pan-Arctic
coupled ice-ocean model simulation, J. Geophys. Res., 109, C03032,
doi:10.1029/2001JC001039.
Proshutinsky, A., I. M. Ashik, E. N. Dvorkin, S. Häkkinen, R. A.
Krishfield, and W. R. Peltier (2004), Secular sea level change in
the Russian sector of the Arctic Ocean, J. Geophys. Res., 109, C03042,
doi:10.1029/2003JC002007.
Steiner, N., Holloway, G., Gerdes, R., Hakkinen, S., Holland, D.,
Karcher, M. J., Kauker, F., Maslowski, W., Proshutinsky, A., Steele,
M., Zhang, J.(2004). Comparing modeled streamfunction, heat and
freshwater content in the Arctic Ocean, Ocean Modelling 6, 265-284.
Yakovlev, N. G., Coupled model of ocean general circulation and sea
ice evolution in the Arctic Ocean, Izvestiya, Atmopsheric and Oceanic
Physics, vol. 39, No 3, 2003, pp. 355-368.
Wang, J., Q. Liu, M. Jin, M. Ikeda and F. Saucier, 2004. A coupled
ice-ocean model in the pan Arctic and the northern North Atlantic
Ocean: Simulation of seasonal cycles (J. Oceanogr., conditionally
accepted).
Wang, J., M. Ikeda, S. Zhang and G. Gerdes, 2004. Linking the northern
hemisphere sea ice reduction trend and the quasi-decadal Arctic sea
ice oscillation (Climate Dyn., accepted).
Zhang, J., M. Steele, D.A. Rothrock, and R.W. Lindsay, Increasing
exchanges at Greenland-Scotland Ridge and their links with the North
Atlantic Oscillation and Arctic sea ice, GRL, in press, 2004.
Published in October-December 2003 and not previously reported to
IARC:
Proshutinsky, A., (2003), Circulation of water and ice. In: Arctic
Environment variability in the context of Global change, Eds. L. P.
Bobylev, K. Ya. Kondratyev and O.M. Johannessen, Springer, Praxis
Publishing, Chichester, UK, p. 172-180.
Proshutinsky, A., (2003), Modeling of ocean and sea ice circulation.
In: Arctic Environment variability in the context of Global change,
Eds. L. P. Bobylev, K. Ya. Kondratyev and O.M. Johannessen, Springer,
Praxis Publishing, Chichester, UK, p. 181-202.
Lindsay R.W., A. P. Makshtas, (2003), Air-sea interaction in the
presence of the Arctic pack ice. In: Arctic Environment variability
in the context of Global change, eds. L.P. Bobylev, K. Ya. Kondratyev
and O.M. Johannessen, Springer, Praxis Publishing, Chichester, UK, p.
203-236.
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