Meridional Components of Atmospheric Circulation and Arctic Ice Cover in Summer

Холопцев, А. В.; Podporin, S. A.

doi:10.3103/s1068373921060030

Cited by 5 publications

(1 citation statement)

References 8 publications

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“…Such circulation is typical for years with high (positive) values of the Arctic Oscillation (AO) index (Thompson and Wallace, 1998): when the west-east air transport is activated, the inflow of warmer and saline waters from the Atlantic increases; however, to some extent, it also decreases the ice cover in the Arctic as a whole (Rigor et al, 2002). Additionally, ice conditions in the Chukchi Sea become more severe than in periods of low (negative) AO values when interlatitudinal exchange is activated, thus leading to the outflow of warm air masses from the south (Kholoptsev and Podporin, 2021; Plotnikov et al, 2020). The conditional western boundary between the Pacific- and Atlantic-derived Arctic shelves can be set along the 170°E meridian (Figure 1).…”

Section: Discussionmentioning

confidence: 99%

Climate and ice conditions of East Siberian Sea during Holocene: Reconstructions based on sedimentary geochemical multiproxy

et al. 2022

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Reconstruction of ice conditions and climate of the East Siberian Sea during the Late Middle Holocene was implemented for the first time using a transfer function method based on marine sedimentation proxies. Transfer functions were developed based on a hydrometeorological time series of changes in mean annual air temperature (ΔT10) and the ice-free period (IF10) for the last 70–90 years and a geochemical time series of bottom sediments accumulated during this time, which were obtained using a submillimeter scanning of the core in the X-ray fluorescence analysis of synchrotron radiation. Geochemical time series of Holocene deposits were obtained from X-ray fluorescence analysis of the core in a step of 1–2 cm. Reconstruction of ice conditions and average annual air temperature revealed a decreasing trend of ΔT10 and IF10, which started from the middle Holocene up to the Little Ice Age due to an orbitally determined decrease in insolation. A synchronous periodicity of changes in ice cover and air temperature was revealed and approximated by periods of 1600 years for IF10 and 1740 years for ΔT10, which are comparable to Bond’s climatic cycles. These results indicates the telecommunication of the Atlantic processes, climate of the East Siberian Sea, and predominance of the cyclonic type of atmospheric circulation during the Holocene.

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Section: Discussionmentioning

confidence: 99%

Climate and ice conditions of East Siberian Sea during Holocene: Reconstructions based on sedimentary geochemical multiproxy

et al. 2022

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Features of Formation of the Lena Polynya on the Estuarine Nearshore of the Bykovsky Arm in Summer

Min’kovskaya

2023

Oceanology

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Current frequency variation trends of dangerous winds in the Eastern sector of the Russian Arctic

Podporin,

Kholoptsev

2023

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The article aim is to identify mean values and change trends in the frequency of winds that pose a danger to navigation on shipping routes of the Laptev and East Siberian Seas which became evident in 2010–2021 period. In the period under review the winds were considered dangerous if their average hourly speed over the water surface at 10 m altitude exceeded 15 m/s. The factual material is based on information from the ERA5 global reanalysis. The research methodology involves the use of standard methods of mathematical statistics. A comparative analysis of the last two 12-year periods (1998–2009 and 2010–2021) has shown that the climate changes that happened in 2010–2021 significantly affected the wind regime of the studied region, which had consequences for shipping. In August, a significant decrease in the frequency of dangerous winds was recorded in the region, which generally contributed to the improvement of navigation safety by reducing storm risks. Opposite trends manifested themselves from September to December, which led to increased storm surge and a rise in the likelihood of ships icing, especially on the high-latitude paths of the Northern Sea Route and approaches to the Long Strait. The decrease in the frequency of winds, revealed in January and April, contributed to the preservation of a stable ice cover and stable difficult navigation conditions in these months. The persistence of the identified trends in interannual changes in the wind regime in the region under consideration in the future is not guaranteed. Therefore, the development of the existing network of Arctic weather stations remains an urgent problem for shipping.

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Meridional Components of Atmospheric Circulation and Arctic Ice Cover in Summer

Cited by 5 publications

References 8 publications

Climate and ice conditions of East Siberian Sea during Holocene: Reconstructions based on sedimentary geochemical multiproxy

Climate and ice conditions of East Siberian Sea during Holocene: Reconstructions based on sedimentary geochemical multiproxy

Features of Formation of the Lena Polynya on the Estuarine Nearshore of the Bykovsky Arm in Summer

Current frequency variation trends of dangerous winds in the Eastern sector of the Russian Arctic

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