Formation of ice compression and ice divergence zones on the north-east Sakhalin shelf under tidal ice drift

摘要

For effective support of offshore ice-resistant structures on the north-east Sakhalin shelf during winter season it is necessary to know the variability of ice cover distribution over the water area. Ice cover redistribution followed by formation of ice compression and ice divergence zones over the Sakhalin offshore water area was earlier observed (Kalinin F.N., Truskov P.A., 1996; Kalinin F.N. 1999) as a function of various metocean conditions. Consideration and forecast of ice compression/divergence zones will facilitate efficient planning of vessels operation to support offshore ice-resistant structures. Synchronous observations of ice drift based on three onshore radar stations (RS) (cape Levenstern, bay Odoptu, village Komrvo) allow the tracing of ice cover distribution variation under changing metocean conditions in the near-shore zone of the north-east Sakhalin shelf.