Interdecadal variability in thermal structure of water in the upper active layer in the northwestern Pacific Ocean

Byshev, V. I.; Figurkin, Alexander; Anisimov, I.M.

doi:10.1134/s1028334x17110113

Cited by 6 publications

(8 citation statements)

References 4 publications

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“…The main materials for studying the structure of MOHO were the results of numerical modelling of the ocean circulation performed with the ocean general circulation model (OGCM) developed at the Institute of Numerical Mathematics of the Russian Academy of Sciences, which is known in international practice as the Institute of Numerical Mathematics Ocean Model (INMOM) [22]. Diagnostic computations [21] along with field observation data obtained in large-scale hydrophysical experiments POLYGON-70, POLYMODE, MEGAPOLIGON and ATLANTEX-90 [23,[26][27][28] were used to validate and confirm the results of the numerical modelling. A brief description of the INMOM mostly adopted from [29] is provided below.…”

Section: Methodsmentioning

confidence: 99%

“…The results of numerical modelling [10] were compared to diagnostic computations [21] and local data [28] obtained in hydrophysical experiments POLYGON-70 (North Atlantic, 1970), POLYMODE (North Atlantic, 1977-1978, MEGAPOLIGON (North Pacific, 1987) and ATLANTEX-90 (North Atlantic, 1990). The hydrophysical experiments listed above used groups of research vessels that carried out complex instrumental observations of the ocean thermodynamic state within several predefined study regions.…”

Section: Methodsmentioning

confidence: 99%

“…Diagnostic computations [21], materials of numerical modelling [22], and experimental data [23] helped in concluding that the change in climatic phases presents a change in the heat exchange regime between the ocean and the atmosphere (for example, [24]) in the global and regional context: the ocean successively passes from the thermal discharge phase into the heat accumulation phase, and then again to the thermal discharge phase. Such phase transitions in the climatic system obviously took place in [1935][1936][1937][1938][1939][1940][1973][1974][1975][1976][1977], and at the turn of the 20th and 21st centuries [2].…”

Section: Introductionmentioning

confidence: 99%

“…Such phase transitions in the climatic system obviously took place in [1935][1936][1937][1938][1939][1940][1973][1974][1975][1976][1977], and at the turn of the 20th and 21st centuries [2]. Another shift may have already occurred during the current decade [21]. Global changes should naturally be accompanied by changes in planetary-scale structures in both the ocean and atmosphere.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Interdecadal Oscillation of the Ocean Heat Content as a Contribution to Understanding of Physical Aspects of the Present-Day Climate

Byshev

Гусев

Neiman

et al. 2022

JMSE

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A Specific feature of the present-day climate dynamics consists in its multidecadal oscillations with a period of about 20–60 years, and intradecadal disturbances with time scales of 2–8 years. The period of 1940–1999 was distinctive due to the two–phase structure in which the initial phase (1940–1974) was substantially dry, and the final one (1975–1999) was relatively humid. The transition of the climate from the dry to the humid phase in the mid-1970s was recognized as a climatic shift. The certain globality and quasisynchronism of multidecadal climate changes occur involving planetary thermodynamic structures in the two most important components of the climate system, namely, the ocean and the atmosphere. The search for the origin of the observed present-day climate variability revealed the World Ocean (WO) active upper layer (AUL) heat content to demonstrate sequential multidecadal phases of heat accumulation and discharge consistent with multidecadal phases of climate disturbances. Thus, the WO AUL heat accumulation phase corresponds to a dry climate, and its thermal discharge corresponds to a relatively humid one. The mechanism of the observed multidecadal phase variability in the present-day climate consists of the planetary intrasystemic redistribution of heat between WO and continental air masses, where the general circulation of the atmosphere plays the role of an intermediary.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Interdecadal Oscillation of the Ocean Heat Content as a Contribution to Understanding of Physical Aspects of the Present-Day Climate

Byshev

Гусев

Neiman

et al. 2022

JMSE

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“…Redistribution of heat within the ocean-atmosphere-continent system is one of the mechanisms of intra-century climate variability. The source of inter-decadal oscillations in the climate system dynamics is the quasi-cyclic process of heat accumulation and heat discharge by the ocean, which is followed by changes in the direction of heat flows between the ocean and atmosphere [3,4]. In this regard, it will be interesting to make a detailed analysis of heat contents variability of the active layer in the World Ocean energetically active zones in the Northern Hemisphere, based on the methods of spectral analysis.…”

Section: Introductionmentioning

confidence: 99%

Empirical orthogonal functions in heat contents of the World Ocean energetically active zones

Karakhanyan

Molodykh

2022

28th International Symposium on Atmospheric and Ocean Optics: Atmospheric Physics

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Based on data from the Met Office Hadley Centre, we studied variations in heat content of the upper active layer (UAL) at middle and high latitudes of the World Ocean using the method of empirical orthogonal functions (EOF). The maximum contribution to the UAL heat contents is provided by the first harmonic that refers to seasonal variations. We analyzed features of spatial distribution of the UAL heat content seasonal variations for the first few EOF modes. Meridional structures are descriptive of the first harmonic. One can observe the first vector maxima in the Atlantics south-western part and in the zone of its eastern coast, and in the Pacific north-western part. Differences in thermal regime between the Atlantics and Pacific western and eastern parts may be due to radiation heating and systems of warm currents. The second and third harmonics have zonal structures.

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On the Multi-Decadal Oscillation of the Heat Content of the World Ocean

Byshev

Anisimov

Гусев

et al. 2020

JOR

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Multi-decade rhythmicity is one of the most important features of the dynamics of the modern climate. The rhythm of 1940–1999 was a two-phase structure in which the initial phase (1940–1974) was essentially continental, and the final phase (1975–1999) was relatively wet. The transition of the climate from the continental phase to the humid one in the mid-70s of the twentieth century was “sudden” and recognized as a climate shift. A certain globality and quasi-synchronicity of multi-decade climate changes is realized with the participation of planetary thermodynamic structures both in the ocean and in the atmosphere of two the most important components of the climate system. The presence of a Global atmospheric oscillation was discovered and studied in detail. This paper offers the first attempt to consider the content and features of the planetary multi-decadal oscillation of the heat content of the World Ocean. The analysis of ocean oscillation is based on the results of numerical simulation of the World Ocean water circulation in the period from 1948 to 2007 using the model of the Marchuk Institute of Numerical Mathematics of Russian Academy of Sciences. The differences in the average water temperature fields in the upper 1200-meter layer, calculated for two opposite phases of the oscillation, revealed the main features of its structure.

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Interdecadal variability in thermal structure of water in the upper active layer in the northwestern Pacific Ocean

Cited by 6 publications

References 4 publications

Interdecadal Oscillation of the Ocean Heat Content as a Contribution to Understanding of Physical Aspects of the Present-Day Climate

Interdecadal Oscillation of the Ocean Heat Content as a Contribution to Understanding of Physical Aspects of the Present-Day Climate

Empirical orthogonal functions in heat contents of the World Ocean energetically active zones

On the Multi-Decadal Oscillation of the Heat Content of the World Ocean

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