scholarly journals NORA10EI: A revised regional atmosphere‐wave hindcast for the North Sea, the Norwegian Sea and the Barents Sea

2020 ◽  
Vol 40 (10) ◽  
pp. 4347-4373 ◽  
Author(s):  
Hilde Haakenstad ◽  
Øyvind Breivik ◽  
Magnar Reistad ◽  
Ole J. Aarnes
Keyword(s):  
North Sea ◽  
Barents Sea ◽  
Norwegian Sea ◽  
Wave Hindcast ◽  
The North ◽  
The Barents Sea ◽  
The North Sea

Marine Operation Windows Offshore Norway

2016 ◽  
Author(s):  
Bjarte O. Kvamme ◽  
Adekunle P. Orimolade ◽  
Sverre K. Haver ◽  
Ove T. Gudmestad
Keyword(s):  
North Sea ◽  
Barents Sea ◽  
Winter Season ◽  
Polar Lows ◽  
Norwegian Sea ◽  
The North ◽  
The Barents Sea ◽  
The North Sea ◽  
Wave Conditions ◽  
Buoy Measurements

A study of the wave conditions in the North Sea, the Norwegian Sea and the Barents Sea is presented in this paper. For each region, one reference location for which there are buoy measurements is selected. For the selected locations, WAM10 hindcast data are obtained from the Norwegian Meteorological Institute (MET Norway). The hindcast data for each location cover the period from 1957 to 2014. First, the hindcast datasets were validated against available buoy measurements — both for extreme value predictions and for application of hindcast data for planning of marine operations. The validation was carried out considering the winter season and the summer season separately. For each season, the datasets for two consecutive months were used. A comparison of the time-series of the hindcast datasets against the buoy measurements showed that the hindcast datasets compared relatively well with the buoy measurements. However, a comparison of the statistical parameters of the hindcast datasets against the buoy measurements showed that the hindcast datasets are slightly conservative in the estimate of the significant wave height for the Barents Sea and the Norwegian Sea. Overall, the data compared well, and the hindcast datasets are therefore considered in the following analysis. Hindcast data from these 57 years show that the wave conditions in the selected Norwegian Sea location is harsher than the wave conditions in both the North Sea and the Barents Sea locations. This is in agreement with the general expected spatial trend in the wave climate on the Norwegian Continental Shelf (NCS). It was also observed that the wave conditions in the selected Barents Sea location are harsher than the wave conditions in the North Sea. These findings are also reflected in the NORSOK N-003 standard on “Actions and Action effects” (NORSOK, 2015). The weather windows for weather-sensitive marine operations, that is, operations with operational reference period not exceeding 72 hours, were established from the hindcast dataset for each of the locations. It was observed that the Norwegian Sea has shorter weather windows, especially in the winter seasons, compared to both the Barents Sea and the North Sea. It was expected that the operational windows would be shorter in the winter seasons in the Barents Sea, due to the occurrence of polar lows. However, the polar lows are few and cause more concern related to forecasting of the weather conditions to start actual marine operations. Generally, the month with the highest probability of weather windows exceeding 72 hours was found to be July for all three locations.

scholarly journals A high-resolution hindcast of wind and waves for the North Sea, the Norwegian Sea, and the Barents Sea

2011 ◽  
Vol 116 (C5) ◽  
Author(s):  
Magnar Reistad ◽  
Øyvind Breivik ◽  
Hilde Haakenstad ◽  
Ole Johan Aarnes ◽  
Birgitte R. Furevik ◽  
...  
Keyword(s):  
High Resolution ◽  
North Sea ◽  
Barents Sea ◽  
Norwegian Sea ◽  
The North ◽  
The Barents Sea ◽  
The North Sea

scholarly journals The northern European shelf as increasing net sink for CO<sub>2</sub>

2020 ◽  
Author(s):  
Meike Becker ◽  
Are Olsen ◽  
Peter Landschützer ◽  
Abdirhaman Omar ◽  
Gregor Rehder ◽  
...  
Keyword(s):  
Baltic Sea ◽  
North Sea ◽  
Barents Sea ◽  
The Baltic Sea ◽  
Surface Ocean ◽  
The North ◽  
Northern European ◽  
The Barents Sea ◽  
The North Sea ◽  
The Baltic

Abstract. We developed a simple method to refine existing open ocean maps towards different coastal seas. Using a multi linear regression we produced monthly maps of surface ocean fCO2 in the northern European coastal seas (North Sea, Baltic Sea, Norwegian Coast and in the Barents Sea) covering a time period from 1998 to 2016. A comparison with gridded SOCAT v5 data revealed standard deviations of the residuals 0 ± 26 μatm in the North Sea, 0 ± 16 μatm along the Norwegian Coast, 0 ± 19 μatm in the Barents Sea, and 2 ± 42 μatm in the Baltic Sea.We used these maps as basis to investigate trends in fCO2, pH and air-sea CO2 flux. The surface ocean fCO2 trends are smaller than the atmospheric trend in most of the studied region. Only the western part of the North Sea is showing an increase in fCO2 close to 2 μatm yr−1, which is similar to the atmospheric trend. The Baltic Sea does not show a significant trend. Here, the variability was much larger than possibly observable trends. Consistently, the pH trends were smaller than expected for an increase of fCO2 in pace with the rise of atmospheric CO2 levels. The calculated air-sea CO2 fluxes revealed that most regions were net sinks for CO2. Only the southern North Sea and the Baltic Sea emitted CO2 to the atmosphere. Especially in the northern regions the sink strength increased during the studied period.

scholarly journals The northern European shelf as an increasing net sink for CO<sub>2</sub>

2021 ◽  
Vol 18 (3) ◽  
pp. 1127-1147
Author(s):  
Meike Becker ◽  
Are Olsen ◽  
Peter Landschützer ◽  
Abdirhaman Omar ◽  
Gregor Rehder ◽  
...  
Keyword(s):  
Baltic Sea ◽  
North Sea ◽  
Barents Sea ◽  
The Baltic Sea ◽  
Surface Ocean ◽  
The North ◽  
Northern European ◽  
The Barents Sea ◽  
The North Sea ◽  
The Baltic

Abstract. We developed a simple method to refine existing open-ocean maps and extend them towards different coastal seas. Using a multi-linear regression we produced monthly maps of surface ocean fCO2 in the northern European coastal seas (the North Sea, the Baltic Sea, the Norwegian Coast and the Barents Sea) covering a time period from 1998 to 2016. A comparison with gridded Surface Ocean CO2 Atlas (SOCAT) v5 data revealed mean biases and standard deviations of 0 ± 26 µatm in the North Sea, 0 ± 16 µatm along the Norwegian Coast, 0 ± 19 µatm in the Barents Sea and 2 ± 42 µatm in the Baltic Sea. We used these maps to investigate trends in fCO2, pH and air–sea CO2 flux. The surface ocean fCO2 trends are smaller than the atmospheric trend in most of the studied regions. The only exception to this is the western part of the North Sea, where sea surface fCO2 increases by 2 µatm yr−1, which is similar to the atmospheric trend. The Baltic Sea does not show a significant trend. Here, the variability was much larger than the expected trends. Consistently, the pH trends were smaller than expected for an increase in fCO2 in pace with the rise of atmospheric CO2 levels. The calculated air–sea CO2 fluxes revealed that most regions were net sinks for CO2. Only the southern North Sea and the Baltic Sea emitted CO2 to the atmosphere. Especially in the northern regions the sink strength increased during the studied period.

Impagidinium obscurum sp. nov., a marker dinoflagellate cyst for the Thanetian (Paleocene) of the North Sea and the Barents Sea

Palynology ◽  
2019 ◽  
Vol 44 (2) ◽  
pp. 382-390 ◽  
Author(s):  
Manuel Vieira ◽  
Manuel Casas-Gallego ◽  
Salih Mahdi ◽  
Jim Fenton
Keyword(s):  
North Sea ◽  
Barents Sea ◽  
Dinoflagellate Cyst ◽  
The North ◽  
The Barents Sea ◽  
The North Sea

The ecological and geographical aspects of the fecundity of the plaice

1966 ◽  
Vol 46 (1) ◽  
pp. 161-186 ◽  
Author(s):  
T. B. Bagenal
Keyword(s):  
Population Density ◽  
North Sea ◽  
Population Regulation ◽  
Barents Sea ◽  
Distinct Pattern ◽  
Southern Bight ◽  
The North ◽  
The Barents Sea ◽  
The North Sea ◽  
The Baltic

During the last 30 years the fecundity of the plaice, Pleuronectes platessa L., has been widely studied over its complete geographical range. In this paper all this previous work is brought together and a distinct pattern (with two exceptions) emerges. The fecundity is lowest in the Southern Bight of the North Sea, and radiating from there in all directions the fecundity increases, while in Faxa Bay (Iceland) and in the Barents Sea it is lower again. The possible factors producing this pattern are examined in detail and it is concluded that the amount of food available, which in turn is related to population density, is the most important. Only in Trondheim Fjord and in the Baltic is the fecundity so different that it is necessary to postulate racially distinct populations. Finally the importance of fecundity variations in natural population regulation is stressed.

High Geostress Advantageous for Arctic Field Developments

2018 ◽  
Author(s):  
Bernt S. Aadnøy ◽  
Mesfin A. Belayneh
Keyword(s):  
Stress State ◽  
North Sea ◽  
Barents Sea ◽  
Wellbore Stability ◽  
The Arctic ◽  
Positive Effects ◽  
The North ◽  
The Barents Sea ◽  
The North Sea ◽  
Sea Area

The Arctic areas of Norway has brought many new challenges. In addition to harsh weather, drilling conditions are different. The Barents Sea is different geologically compared to the North Sea area. A considerable amount of erosion bring older rocks higher up. It is observed that leak-off tests measured in Barents Sea wells shows abnormally high values. This is interpreted as a high stress state. The paper analyze the stresses around a number of wells and conclude that it is very likely that a reverse fault stress state exists in these areas of the Barents Sea. This can bring positive effects because such a stress state may constrain induced fractures to propagate in a horizontal plane rather than towards surface, reducing the risk for reservoir leaks to surface. Also, a high compressive state may lead to more sealed faults, indicating a higher possibility for oil in place. The paper will present the stress model and compare Barent Sea area to the North Sea. It will also show implications for wellbore stability, leaks from reservoirs and effects on sealing of major faults. Of particular interest is that leak potential from the reservoir is reduced in the Barent Sea as compared to other Norwegian oil fields. This may encourage more development in the Arctic areas.

scholarly journals Characterization of Wind-Sea- and Swell-Induced Wave Energy along the Norwegian Coast

Atmosphere ◽  
2020 ◽  
Vol 11 (2) ◽  
pp. 166
Author(s):  
Konstantinos Christakos ◽  
George Varlas ◽  
Ioannis Cheliotis ◽  
Christos Spyrou ◽  
Ole Johan Aarnes ◽  
...  
Keyword(s):  
North Sea ◽  
Energy Flux ◽  
Wave Energy ◽  
Barents Sea ◽  
Renewable Energy Sources ◽  
Norwegian Sea ◽  
The North ◽  
The North Sea ◽  
Wave Energy Flux ◽  
Wind Sea

The necessity to reduce C O 2 emissions in combination with the rising energy demand worldwide makes the extensive use of renewable energy sources increasingly important. To that end, countries with long coastlines, such as Norway, can exploit ocean wave energy to produce large amounts of power. In order to facilitate these efforts as well as to provide quantitative data on the wave energy potential of a specific area, it is essential to analyze the weather and climatic conditions detecting any variabilities. The complex physical processes and the atmosphere-wave synergetic effects make the investigation of temporal variability of wave energy a challenging issue. This work aims to shed new light on potential wave energy mapping, presenting a spatio-temporal assessment of swell- and wind-sea-induced energy flux in the Nordic Seas with a focus on the Norwegian coastline using the NORA10 hindcast for the period 1958–2017 (59 years). The results indicate high spatial and seasonal variability of the wave energy flux along the coast. The maximum wave energy flux is observed during winter, while the minimum is observed during summer. The highest coastal wave energy flux is observed in the Norwegian Sea. The majority of areas with dominant swell conditions (i.e., in the Norwegian Sea) are characterized by the highest coastal wave energy flux. The maximum values of wave energy flux in the North Sea are denoted in its northern parts in the intersection with the Norwegian Sea. In contrast to the Norwegian Sea, areas located in the North Sea and the Barents Sea show that wind sea is contributing more than swell to the total wave energy flux.

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