NPEO: The North Pole Environmental Observatory Logistics: Andy Heiberg ( U of WA ) Synoptic hydrographic surveys: Kelly Falkner & Bob Collier ( OSU ):

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Presentation transcript:

NPEO: The North Pole Environmental Observatory Logistics: Andy Heiberg ( U of WA ) Synoptic hydrographic surveys: Kelly Falkner & Bob Collier ( OSU ): Hydrochemistry Mike Steele ( U of WA ): Oceanography Bottom mooring: Knut Aagaard ( U of WA ): Oceanography Dick Moritz ( U of WA ): Sea ice Lead PI Jamie Morison ( U of WA ) - Lead PI and oceanography Ice drifting buoys: Takashi Kikuchi ( Jamstec ): Oceanography Miles McPhee ( MRI ): Oceanography Jim Overland ( NOAA/PMEL ): Meteo and sea ice

Project Mission & Status Mission: Provide sustained observations and platform/science support for others in a part of the central Arctic Ocean that shows clear climate change signals Data: –65 hydro stations, 5 years of mooring data, 7 years of drifting buoy data – Selected Publications: Morison et al., Early results from NPEO, EOS Trans., (2002). Steele, M., J. Morison, W. Ermold, I. Rigor, M. Ortmeyer, and K. Shimada, "Pacific Halocline Water in the Arctic Ocean", J. Geophys. Res., p. C020027, vol. 109, (2004), /2003JC Inoue, J., T. Kikuchi, D. Perovich, and J.H. Morison, "A drop in mid-summer shortwave radiation induced by changes in the ice- surface condition in the central Arctic", Geophys. Res. Lett., p. L13603, vol. 32(13), (2005). Kikuchi, T., J. Inoue, and J. Morison, "Temperature difference across the Lomonosov Ridge: Implications for the Atlantic Water circulation in the Arctic Ocean", Geophys. Res. Lett., p. L20604, vol. 32, (2005), /2005GL Morison, J. H., M. Steele, T. Kikuchi, K. K. Falkner, and W. Smethie, "The Relaxation of Central Arctic Ocean Hydrography to pre- 1990s Climatology", Geophys. Res. Lett., p. L17604, vol. 33(17), (2006), /2006GL Inoue, J., and T. Kikuchi, "Outflows of Summertime Arctic Sea Ice Observed by Ice Drifting Buoys and their Linkage with Atmospheric Circulations", J. Meteorol. Soc. Japan, p. 1, vol. 85,6, (2007) Alkire, M. B., K. K. Falkner, I. Rigor, M. Steele, and J. H. Morison, "The return of Pacific waters to the upper layers of the central Arctic Ocean", Deep-Sea Res., p. 1509, vol. I 54, (2007) Overland, J. E.; M. Wang; S.A. Salo, "The Recent Arctic Warm Period", Tellus,, (2007) Bond, N. A., J. E. Overland, and S. A. Salo, "Influence of the Regional Atmospheric Circulation on Observed Shortwave Radiation at the North Pole", J. Geophys. Res., (2008). Submitted, Polyakov, I. V., V. Alexeev, G. I. Belchansky, I. A. Dmitrenko, V. Ivanov, S. Kirillov, A. Korablev, M. Steele, L. A. Timokhov, and I. Yashayaev, "Arctic Ocean Freshwater Changes Over the Past 100 Years and their Causes", J. Climate, p. 364, vol. 21, (2008). Aagaard, K., R. Andersen, J. Swift, and J. Johnson, "A Large Eddy in the Central Arctic Ocean", Geophys. Res. Lett., (2008). Submitted

Coordination Logistics: International Arctic Buoy Program, NPEO deploys IABP buoys. Snow sampling is done for projects by Koerner (pollen) and by Grenfell and Warren (soot). Annual Cycles of Nitrate and Phytoplankton Stocks Using Optics at the NPEO, Christensen and Pegau install a multi-spectral light sensor and bio-sensor arrays on NPEO mooring. Deep Ocean Mixing by Iker Fir of Bjerknes Center in Bergen Norway makes microstructure measurements of deep mixing. Beaufort Gyre Exploration Project - Ice-Tethered Profiler buoy deployments Arctic Bottom Pressure, Jamie Morison, Ron Kwok, and John Wahr install the Arctic Bottom Pressure Recorders near Pole for comparison with GRACE. Ocean Flux Buoy - buoy at automated station Switchyard Project - Lincoln Sea oceanography Science: In addition to science related to all of the above, Polyakov et al. (2004, 2008) have used NPEO data to examine trends in Atlantic Water and freshwater properties.

Future Directions Hydro Surveys: Additional sampling for biogeochemical cycling and primary productivity Digital sampling for nutrients, other parameters Mooring and drifting buoys: Profiling sensors instead of fixed-depth sensors More coordination with AON projects, in particular Switchyard & Beaufort Gyre This Year (April, 2008) Deployment via Canada (Resolute) & Norway (Longyearbyen) First use of Russian cargo planes, hopefully will ease logistics clashes at Russian camp “Borneo”

IPY - Airborne Hydro Surveys Jamie Morison, Mike Steele, Andy Heiberg, Miles McPhee ( U of WA ) Bob Collier ( OSU ) & Chris Guay ( Cal State ) Andrey Proshutinsky ( WHOI ) Expansion of NPEO springtime airborne surveys with more stations and surveys in Beaufort (starting now) to complement summer stations (e.g. BGOS). Trans-Arctic section across 90W-90E in 2007 in spite of curtailed NPEO operations. Looks like conditions are trending back towards those of the 1990s! Data in NPEO data stream.