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SUMMARY:Recent shelf-slope studies in the Arctic Ocean: observations and m
 odeling - Vladimir Ivanov (Scottish Association for Marine Science (SAMS)\
 , Oban)
DTSTART:20090220T110000Z
DTEND:20090220T120000Z
UID:TALK16912@talks.cam.ac.uk
CONTACT:Robert Bingham
DESCRIPTION:Recent decade was marked by enhanced attention to the Arctic O
 cean from scientists and policy makers. The major reason behind this is th
 at among predicted consequences of climate change\, the one of the ice-fre
 e Arctic Ocean is probably the most dramatic and impacting for society in 
 general and for the Arctic-bounding nations in particular. The other reaso
 n is that advancing technology of oceanographic observations provided poss
 ibilities for experimental studies\, which could not be imagined 20 years 
 ago. From the other hand\, increasing cost of fuel and thence\, field rese
 arch carriers (vessels\, icebreakers) called for consolidating efforts and
  funds in big field projects in order to get maximum benefit from the ship
 -time and to conduct truly multidisciplinary research studies. During the 
 recent 4.5 years of my scientific carrier I was involved in such big proje
 ct NABOS (=Nansen and Amundsen Basin Observational System)\, which is the 
 long term multinational program initiated in the International Arctic Rese
 arch Centre\, University of Alaska Fairbanks (IARC UAF) in 2002. The overa
 ll goal of this project is to get continuous time series of water properti
 es in key locations along the Eurasian continental margin. The basic appro
 ach is to use autonomous anchored moorings\, operating for one year at a t
 ime with replacement every year. By the present time\, NABOS operates for 
 6 years\, provided new unique data on the Arctic Ocean environment and gai
 ned wide international recognition. The scientific results\, I will presen
 t in this talk\, were obtained in framework of this program with my direct
  contribution. However\, I would like to stress that these results were ob
 tained in combined efforts of many scientists and technicians and pay my d
 eep respect to them. I will touch the following topics: (i) substantial wa
 rming in the intermediate Atlantic Water (AW) layer in 2000s – its route
 s and development\; (ii) seasonal oscillations in the AW layer deep in the
  Arctic Ocean and possible applications of this new knowledge for the Arct
 ic Ocean climatology\; (iii) dense water cascading from the Arctic shelves
  – new observations suggesting deep penetration of dense water plumes\; 
 (iv) vertical heat and salt exchange between AW and overlying waters – p
 ossible effect of AW heat on the ice cover.
LOCATION:British Antarctic Survey\, Room 307
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