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O. O. Trusenkova S. V. Stanichnyi Yu. B. Ratner 《Izvestiya Atmospheric and Oceanic Physics》2007,43(5):634-648
The expansion of wind fields observed at fixed times (four times daily) in complex empirical orthogonal functions is performed for the Japan Sea area (34°–53° N, 127°–143° E). The wind fields are taken from the 1998–2004 NCEP/NCAR Reanalysis data with better spatial resolution (1° × 1°) than the standard product, which are publicly available on the Internet. Major modes of wind variability in the Japan Sea area are identified. The modes determine a general direction of air-mass transport throughout a year, zonal and meridional modulation, and a cyclonic and an anticyclonic eddy component. Objective classification of wind fields with respect to the prevailing flow direction is performed, and wind stress and wind-curl patterns are obtained for major events in the cold and warm periods of the year. The pattern obtained can be used in hydrodynamic numerical models of the general circulation of the Japan Sea. 相似文献
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Izvestiya, Atmospheric and Oceanic Physics - Long-term changes in the Sea of Japan level are estimated based on the Ssalto/Duacs satellite altimetry data. Linear sea level trends for... 相似文献
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O. O. Trusenkova 《Oceanology》2014,54(1):8-16
The variability of the geostrophic eddy kinetic energy (EKE) in the Sea of Japan derived from weekly altimetric sea level anomalies spanning from 1992 through 2009 is studied. Nonorthogonal modes of variability are revealed accounting for more than 60% of the total variance. They capture the seasonal variation of the mesoscale energetics in the entire Sea of Japan with the EKE growing in the warm season up to the maximum in October through November and diminishing in the cold season down to the minimum in March through April. In the northern Sea of Japan (northward of the Subarctic Front), where the mean EKE is several times less than in the southern sea, areas of considerable variability are detected. Quasi-biennial EKE oscillations are revealed but not the trends covering the whole record. 相似文献
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Variability of sea level in the Sea of Japan is studied using multivariate analysis of weekly altimetry fields spanning from October 1992 through October 2009. Interacting (non-orthogonal) modes of variability are revealed on seasonal time scale, representing synchronous oscillations in the entire Sea and meridional sea level gradient, respectively. The highest sea level and sharpest gradient occur in October and the strongest opposite phase occurs in March. Intra-seasonal and quasi-biennial synchronous oscillations also occur. The fluctuations of the level gradients are not statistically significant on these time scales. The 180-degree-out-of-phase oscillations occur in the western and eastern parts of the Sea on semiannual, annual, quasi-biennial, and longer interannual time scales, manifesting substantial changes in the regional circulation patterns. No secular trends related to the revealed modes were detected. 相似文献
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Trusenkova O. O. Lobanov V. B. Ladychenko S. Yu. Kaplunenko D. D. 《Izvestiya Atmospheric and Oceanic Physics》2021,57(9):969-979
Izvestiya, Atmospheric and Oceanic Physics - In early October 2011, two surface buoys were deployed off Peter the Great Bay in the Sea of Japan. They drifted in that area first, then crossed the... 相似文献
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O. O. Trusenkova V. B. Lobanov D. D. Kaplunenko 《Izvestiya Atmospheric and Oceanic Physics》2008,44(4):517-530
The variability of sea surface temperature (SST) in the Japan Sea is investigated using the complex EOF analysis of daily data produced at Tohoku University, Japan (New Generation SST; 2002–2006). The relationship with the wind field is investigated from the daily NCEP/NCAR reanalysis data with a 1° spatial resolution. Anomalies in the SST (SSTAs) are calculated by subtracting the basin-average annual variation estimated as a leading mode of temperature. The leading mode of an SSTA represents a adjustment to the annual mean variation, most significant in December in the zone of subtropical waters entering the sea through the Korean Strait and in the northwestern sea, over which a cyclonic wind curl develops in the cold period. The semiannual variability mode is identified, which is characterized by the largest temperature increase (decrease) in the western branch of the subarctic front (in the Tatar Strait), which lags by two months behind the semiannual changes in wind curl over the sea. An episodic SSTA movement is detected in the northern part of the sea, which moves from east to west along the western branch of the Tsushima Warm Current with a speed corresponding in magnitude to an advective scale. 相似文献
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