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Articles by Igor V. Polyakov
Sea surface height variability shapes Siberian Arctic Ocean circulation and Pacific Water inflow
Abstract The Siberian Arctic Ocean links river runoff, sea ice, and Pacific–Atlantic exchanges, yet the drivers of its circulation variability remain poorly constrained. Using multi-decadal satellite altimetry, ocean reanalysis products, and in situ observations with cyclostationary empirical orthogonal function analysis, we show that shelf and slope currents are governed by distinct mechanisms across timescales.
Atlantification advances into the Amerasian Basin of the Arctic Ocean
Abstract Atlantification—the northward inflow of anomalous waters and biota from the Atlantic into the polar basins—has wide-ranging climatological ramifications. We present previously unknown observational evidence that the atlantification processes are strengthening in the eastern Eurasian Basin. The primary example is the diminishing sea ice, which is related to a powerful ocean-heat/ice-albedo feedback, which accelerates sea-ice losses.
Domain Mobility in the ORF2p Complex Revealed by Molecular Dynamics Simulations and Big Data Analysis
1. Introduction The long interspersed nuclear element-1 (LINE-1) belongs to non-long terminal repeat (non-LTR) retrotransposons that use the “copy-and-paste” strategy to replicate themselves [1]. Their activity can promote aberrant transcription, insertional mutagenesis, DNA damage and genome instability [2,3,4]. These processes play key roles in the pathophysiology of cancer [5], autoimmune diseases [6], and aging processes [7,8].
Atmospheric Pressure Rivalry Between the Arctic and Northern Pacific: Implications for Alaskan Climate Variability
1 Introduction Arctic sea ice loss and atmospheric warming have increased significantly in recent decades, and both trends have emerged as primary indicators of global warming, suggesting that the Arctic is undergoing notable and possibly irreversible changes (Box et al. 2019).
Modulated trends in Arctic surface air temperature extremes as a fingerprint of climate change
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Fluctuating Atlantic inflows modulate Arctic atlantification
Published In Science Volume 381 | Issue 6661 1 September 2023 Article versions Submission history Received: 9 March 2023 Accepted: 19 July 2023 Published in print: 1 September 2023 Permissions Request permissions for this article. Acknowledgments Funding: This study was supported by NSF grant no. 1724523 (A.V.P. and I.V.P.) and ONR grant no. N00014-21-1-2577 (I.V.P.). J.A.F. was supported by funding from the Woodwell Climate Research Center.
Divergence in Climate Model Projections of Future Arctic Atlantification
Keywords: Arctic; Freshwater; Surface layer; Ocean models; Coupled models; Mixing 1. Introduction Much of the present-day central Arctic Ocean is a so-called beta ocean—it is strongly stratified by salinity, unlike subtropical seas where the upper layers are stratified by temperature (Nansen 1902; Carmack 2007). Over the last few decades, the Arctic region has experienced surface warming at more than twice the global rate (Cohen et al.
Modeling Light-Induced Chromophore Hydration in the Reversibly Photoswitchable Fluorescent Protein Dreiklang
This is an early access version, the complete PDF, HTML, and XML versions will be available soon. Open AccessFeature PaperArticle by Bella L. Grigorenko 1,2, Igor V. Polyakov 1,2 and Alexander V. Nemukhin 1,2,* 1 Department of Chemistry, M.V. Lomonosov Moscow State University, Moscow 119991, Russia 2 N.M. Emanuel Institute of Biochemical Physics, Russian Academy of Sciences, Moscow 119334, Russia * Author to whom correspondence should be addressed.
10 best firms for unlimited e-commerce website design services
IF YOU ARE SEARCHING FOR THE TOP 10 BEST FIRMS FOR UNLIMITED E-COMMERCE WEBSITE DESIGN SOLUTIONS, THEN YOU ARE AT THE RIGHT PLACE Below are the details of these firms. With time, the competition between the firms of e-commerce website designs is becoming fiercer and more hard-hitting as many new competitors are emerging in the market with new and innovative web designs. In this way, it is tough for the customers to select what they desire.
Increasing riverine heat influx triggers Arctic sea ice decline and oceanic and atmospheric warming
Abstract Arctic river discharge increased over the last several decades, conveying heat and freshwater into the Arctic Ocean and likely affecting regional sea ice and the ocean heat budget. However, until now, there have been only limited assessments of riverine heat impacts. Here, we adopted a synthesis of a pan-Arctic sea ice–ocean model and a land surface model to quantify impacts of river heat on the Arctic sea ice and ocean heat budget.
Intensification of Near‐Surface Currents and Shear in the Eastern Arctic Ocean
Abstract A 15‐year (2004–2018) record of mooring observations from the upper 50 m of the ocean in the eastern Eurasian Basin reveals increased current speeds and vertical shear, associated with an increasing coupling between wind, ice, and the upper ocean over 2004–2018, particularly in summer.
Princess Madeleine of Sweden shares rare picture of her daughter in cute Instagram snap
Princess Madeleine of Sweden shares rare picture of her daughter in cute Instagram snap The princess and her husband were at the front of the picture, with grandparents Queen Silvia of Sweden and King Carl XVI Gustaf of Sweden as well … Like this:Like Loading... Related
Greater role for Atlantic inflows on sea-ice loss in the Eurasian Basin of the Arctic Ocean
The eastern Eurasian Basin of the Arctic Ocean is on the far side of the North Pole from the Atlantic, but it is becoming more like its larger neighbor as the climate warms. Polyakov et al. show that this region is also evolving toward a state of weakened stratification with increased vertical mixing, release of oceanic heat, and less sea ice.
Greater role for Atlantic inflows on sea-ice loss in the Eurasian Basin of the Arctic Ocean
Arctic sea-ice loss is a leading indicator of climate change and can be attributed, in large part, to atmospheric forcing. Here, we show that recent ice reductions, weakening of the halocline, and shoaling of intermediate-depth Atlantic Water layer in the eastern Eurasian Basin have increased winter ventilation in the ocean interior, making this region structurally similar to that of the western Eurasian Basin.
Aerosol-driven increase in Arctic sea ice over the middle of the 20th Century
Updated observational datasets without climatological infilling show that there was an increase in sea ice concentration in the Eastern Arctic between 1950 and 1975, contrary to earlier climatology in-filled observational datasets that show weak inter-annual variations during that time period. We here present climate model simulations showing that this observed sea ice concentration increase was primarily a consequence of cooling induced by increasing anthropogenic aerosols and natural forcing.
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