The three-dimensional spatial autocorrelation of ionospherically propagated wave packets in the arctic region

2013 ◽  
Author(s):  
Ryan J. Riddolls
Keyword(s):  
Spatial Autocorrelation ◽  
Wave Packets ◽  
Three Dimensional ◽  
Arctic Region ◽  
The Arctic ◽  
The Arctic Region

Simulation of electromagnetic signal of profile observations from a drifting surface

2020 ◽  
Author(s):  
Polina S. Osipova ◽  
◽  
Arkadiy V. Zlobinskiy ◽  
Vladimir V. Potapov ◽  
◽  
...  
Keyword(s):  
Electric Dipole ◽  
Born Approximation ◽  
Three Dimensional ◽  
Arctic Region ◽  
The Arctic ◽  
Electromagnetic Signal ◽  
Simulation Results ◽  
Dimensional Simulation ◽  
The Arctic Region

As part of the RSF project, the use of a drifting surface on which geophysical installations will be placed is proposed to study the environment in the Arctic region. The proposed method of electrical exploration is sounding with a circular electric dipole as a source. Studying the applicability of the technique requires three–dimensional simulation of the received signal. The paper shows some simulation results using the previously proposed algorithm based on the Born approximation.

scholarly journals SIMULATION OF ELECTROMAGNETIC SOUNDING SIGNALS FROM THE ARCTIC ICE SURFACE

2019 ◽  
Vol 2 (2) ◽  
pp. 116-123
Author(s):  
Polina Osipova ◽  
Vladimir Mogilatov ◽  
Arkadiy Zlobinskiy
Keyword(s):  
Born Approximation ◽  
Three Dimensional ◽  
Arctic Region ◽  
The Arctic ◽  
Electromagnetic Sounding ◽  
Three Dimensional Modeling ◽  
Ice Surface ◽  
Dimensional Modeling ◽  
Arctic Ice ◽  
The Arctic Region

Electromagnetic sounding of the Arctic region is hampered by the influence of the conductive layer of seawater. As part of the RSF project, it is proposed to use a circular electrical dipole (CED) to excite the field. Installation should be placed on drifting ice. This technique requires three-dimensional modeling for which there are complex algorithms. The paper proposes an approach using the Born approximation to simplify the implementation of three-dimensional modeling of the electromagnetic sounding signal using CED.

scholarly journals The role of tropopause polar vortices in the intensification of Summer Arctic cyclones

2021 ◽  
Author(s):  
Suzanne L. Gray ◽  
Kevin Hodges ◽  
Jonathan Vautrey ◽  
John Methven
Keyword(s):  
Three Dimensional ◽  
Arctic Region ◽  
The Arctic ◽  
Polar Regions ◽  
Synoptic Scale ◽  
Coherent Vortices ◽  
Cyclone Genesis ◽  
Ecmwf Reanalysis ◽  
The Arctic Region

<p>Human activity in the Arctic is expected to increase as new regions become accessible, with a consequent need for reliable forecasts of hazardous weather. Arctic cyclones are synoptic-scale cyclones developing within or moving into the Arctic region. Meso- to synoptic-scale tropopause-based coherent vortices called tropopause polar vortices (TPVs) are frequently observed in polar regions and are a proposed mechanism for Arctic cyclone genesis and intensification. While the importance of pre-existing tropopause-level features for cyclone development, and their existence as part of the three-dimensional mature cyclone structure, is well established in the mid-latitudes, evidence of the importance of pre-existing TPVs for Arctic cyclone development is more limited. Here we present a climatology and characteristics of summer Arctic cyclones and TPVs, produced by tracking them in the latest global ECMWF reanalysis (ERA5), and determine the role of pre-existing TPVs in the initiation and intensification of these cyclones.</p>

scholarly journals Short-lived climate forcers from current shipping and petroleum activities in the Arctic

2012 ◽  
Vol 12 (4) ◽  
pp. 1979-1993 ◽  
Author(s):  
K. Ødemark ◽  
S. B. Dalsøren ◽  
B. H. Samset ◽  
T. K. Berntsen ◽  
J. S. Fuglestvedt ◽  
...  
Keyword(s):  
Radiative Forcing ◽  
State Of The Art ◽  
Three Dimensional ◽  
Arctic Region ◽  
The Arctic ◽  
Mean Values ◽  
Albedo Effect ◽  
Carbon Aerosols ◽  
Petroleum Extraction ◽  
The Arctic Region

Abstract. Emissions of short-lived climate forcers (SLCF) in the Arctic region are expected to increase, notably from shipping and petroleum extraction. We here discuss changes in atmospheric SLCF concentrations and resulting radiative forcing (RF) from present day shipping and petroleum activities in the Arctic. The three-dimensional chemistry transport OsloCTM2 and a state of the art radiative forcing model are used, based on a coherent dataset of present day Arctic emissions. We find that the net RF of SLCF of shipping in the Arctic region is negative, mainly due to the direct and indirect RF effects of sulphate emissions, while the net RF of SLCF of petroleum extraction is positive, mainly due to the effects of black carbon aerosols in the air and deposited on snow. Strong seasonal variations of the sensitivities to emissions are found. In terms of annual mean values we find that the Arctic sensitivities to SLCF is similar to global average sensitivities. One exception to this is the stronger snow/ice albedo effect from BC emissions.

704 Three dimensional Na lidar observation in the Arctic region

2013 ◽  
Vol 2013 (0) ◽  
pp. 190-191
Author(s):  
Wataru Muranaka ◽  
Takuya Kawahara ◽  
Hikaru Fukasawa ◽  
Satonori Nozawa
Keyword(s):  
Three Dimensional ◽  
Arctic Region ◽  
The Arctic ◽  
Lidar Observation ◽  
The Arctic Region

Nuclear icebreaker fleet and power supply on the basis of floating power units

2018 ◽  
Vol 35 (4) ◽  
pp. 110-113
Author(s):  
V. A. Tupchienko ◽  
H. G. Imanova
Keyword(s):  
Foreign Policy ◽  
Power Supply ◽  
Nuclear Power ◽  
Arctic Region ◽  
Nuclear Industry ◽  
The Arctic ◽  
Far North ◽  
The Arctic Region

The article deals with the problem of the development of the domestic nuclear icebreaker fleet in the context of the implementation of nuclear logistics in the Arctic. The paper analyzes the key achievements of the Russian nuclear industry, highlights the key areas of development of the nuclear sector in the Far North, and identifies aspects of the development of mechanisms to ensure access to energy on the basis of floating nuclear power units. It is found that Russia is currently a leader in the implementation of the nuclear aspect of foreign policy and in providing energy to the Arctic region.

Chemical Composition of Atmospheric Aerosol in the Arctic Region and Adjoining Seas along the Routes of Marine Expeditions in 2018–2019

2020 ◽  
Vol 33 (5) ◽  
pp. 480-489
Author(s):  
L. P. Golobokova ◽  
T. V. Khodzher ◽  
O. N. Izosimova ◽  
P. N. Zenkova ◽  
A. O. Pochyufarov ◽  
...  
Keyword(s):  
Chemical Composition ◽  
Atmospheric Aerosol ◽  
Arctic Region ◽  
The Arctic ◽  
The Arctic Region

Estimating Friction Reduction ForCasing Operations in High-Angle Wells in The Arctic Region - A Russia Case History

2011 ◽  
Author(s):  
Chimerebere Onyekwere Nkwocha ◽  
Evgeny Glebov ◽  
Alexey Zhludov ◽  
Sergey Galantsev ◽  
David Kay
Keyword(s):  
Case History ◽  
Arctic Region ◽  
Friction Reduction ◽  
The Arctic ◽  
High Angle ◽  
The Arctic Region

scholarly journals Temperature and Relative Humidity Profile Retrieval from Fengyun-3D/HIRAS in the Arctic Region

2021 ◽  
Vol 13 (10) ◽  
pp. 1884
Author(s):  
Jingjing Hu ◽  
Yansong Bao ◽  
Jian Liu ◽  
Hui Liu ◽  
George P. Petropoulos ◽  
...  
Keyword(s):  
Relative Humidity ◽  
Real Time ◽  
Wide Spectrum ◽  
Warm Season ◽  
Arctic Region ◽  
Cold Season ◽  
The Arctic ◽  
Practical Applications ◽  
A New Technique ◽  
The Arctic Region

The acquisition of real-time temperature and relative humidity (RH) profiles in the Arctic is of great significance for the study of the Arctic’s climate and Arctic scientific research. However, the operational algorithm of Fengyun-3D only takes into account areas within 60°N, the innovation of this work is that a new technique based on Neural Network (NN) algorithm was proposed, which can retrieve these parameters in real time from the Fengyun-3D Hyperspectral Infrared Radiation Atmospheric Sounding (HIRAS) observations in the Arctic region. Considering the difficulty of obtaining a large amount of actual observation (such as radiosonde) in the Arctic region, collocated ERA5 data from European Centre for Medium-Range Weather Forecasts (ECMWF) and HIRAS observations were used to train the neural networks (NNs). Brightness temperature and training targets were classified using two variables: season (warm season and cold season) and surface type (ocean and land). NNs-based retrievals were compared with ERA5 data and radiosonde observations (RAOBs) independent of the NN training sets. Results showed that (1) the NNs retrievals accuracy is generally higher on warm season and ocean; (2) the root-mean-square error (RMSE) of retrieved profiles is generally slightly higher in the RAOB comparisons than in the ERA5 comparisons, but the variation trend of errors with height is consistent; (3) the retrieved profiles by the NN method are closer to ERA5, comparing with the AIRS products. All the results demonstrated the potential value in time and space of NN algorithm in retrieving temperature and relative humidity profiles of the Arctic region from HIRAS observations under clear-sky conditions. As such, the proposed NN algorithm provides a valuable pathway for retrieving reliably temperature and RH profiles from HIRAS observations in the Arctic region, providing information of practical value in a wide spectrum of practical applications and research investigations alike.All in all, our work has important implications in broadening Fengyun-3D’s operational implementation range from within 60°N to the Arctic region.

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