scholarly journals Towards structured coordination of sustained observations of Arctic change: An update from the Arctic Observing Summit 2018

2019 ◽  
Author(s):  
Hajo Eicken ◽  
Sandra Starkweather ◽  
Hank Loescher ◽  
Roberta Pirazzini ◽  
Tetsuo Sueyoshi ◽  
...  
Keyword(s):  
Eos ◽  
2020 ◽  
Vol 101 ◽  
Author(s):  
Bryan Duncan ◽  
Lesley Ott ◽  
Claire Parkinson

New satellite instruments and data, plus a more comprehensive observing network, are key to increasing our understanding of past and future change in the Arctic Boreal Zone.


2018 ◽  
Author(s):  
Andrey Vedenin ◽  
Manuela Gusky ◽  
Andrey Gebruk ◽  
Antonina Kremenetskaia ◽  
Elena Rybakova ◽  
...  

AbstractPermanent ice coverage and the low primary production in the mostly ice-covered Central Arctic ocean basins result in significantly lower biomass and density of macrobenthos in the abyssal plains compared to the continental slopes. However, little is known on bathymetric and regional effects on macrobenthos diversity. This study synthesizes new and available macrobenthos data to provide a baseline for future studies of the effects of Arctic change on macrofauna community composition in the Arctic basins. Samples taken during three expeditions (in 1993, 2012 and 2015) at 37 stations on the slope of the Barents and Laptev Seas and in the abyssal of the Nansen and Amundsen Basins in the depth range from 38 m to 4381 m were used for a quantitative analysis of species composition, abundance and biomass. Benthic communities clustered in five depth ranges across the slope and basin. A parabolic pattern of species diversity change with depth was found, with the diversity maximum for macrofauna at the shelf edge at depths of 100-300 m. This deviates from the typical species richness peak at mid-slope depths of 1500-3000 m in temperate oceans. Due to the limited availability of standardized benthos data, it remains difficult to assess the massive sea ice retreat observed in the past decade has affected benthic community composition. The polychaete Ymerana pteropoda and the bryozoan Nolella sp. were found for the first time in the deep Nansen and Amundsen Basins, as a potential first sign of increasing productivity and carbon flux with the thinning ice.


2016 ◽  
Vol 42 (2) ◽  
pp. 173-192 ◽  
Author(s):  
James D. Reist ◽  
Chantelle D. Sawatzky ◽  
L. Johnson
Keyword(s):  

Author(s):  
Minjoo Choi ◽  
Stein Ove Erikstad ◽  
Sören Ehlers

For the design of an ice-going ship, determining its ice-capability is one of the key design aspects. Excessive ice-capability increases the ship’s acquisition cost and reduces its deadweight capacity. On the other hand, less ice-capability limits its serviceable area and it decreases the probability for the ship to complete its given/expected missions successfully. The ice conditions, which the ship would encounter during its operations, are dependent on its route planning, and they become a basis for the determination of its ice-capability. For the design of an ice-going ship, which is going to be operated under constant operational conditions, static route analysis or use of historical voyage data is sufficient to estimate its required ice-capability. However, if the operational conditions change dynamically, like the Arctic sea ice conditions, a dynamic route analysis is needed. Otherwise, the required ice-capability tends to be over-estimated by the static analysis. Sea ice conditions in the Arctic change dynamically from hour-to-hour. In addition, the forecast of its operational conditions has a high uncertainty due to lack of understanding of the Arctic sea ice. Thus, for the design of a ship for Arctic operation, we carry out transit simulations in a dynamic and stochastic manner in this paper and estimate the required ice-capability from the simulations’ result.


Polar Record ◽  
2016 ◽  
Vol 52 (4) ◽  
pp. 412-422 ◽  
Author(s):  
Peter Hemmersam

ABSTRACTIn 1968, the British/Swedish architect Ralph Erskine published an article ‘Architecture and town planning in the north’ in this journal, in which he called for a particular Arctic approach to the design of buildings and cities that is distinct from mainstream architecture due to conditions such as harsh climate, resident indigenous or sparse population and remoteness. One hundred years after his birth (in 1914), Erskine is still considered the authoritative ‘Arctic architect’, and his approach is paradigmatic among many architects dealing with the built environment in the Arctic, sub-Arctic and northern regions.However, a study of the literature on architectural practice and the built environment in the north reveals a number of varying conceptions of Arctic architecture. These different perspectives are social in nature and construct the architectural technologies, the natural environment and society in different configurations. This article finds that architectural discourses and readings of the Arctic change under the influence of social, cultural, political and architectural paradigms. The perspectives identified in the article are seen to be critical supplements to Erskine's utopian approach to developing new sustainable forms of urbanism and architecture in the Arctic. They also reveal that new conceptions do not necessarily replace previous ones but often overlap and place earlier ideas into fresh concepts and that certain conceptions appear to perpetuate over the decades, such as the Arctic as an ‘empty space’. The thinking on Arctic futures is, in many ways, trapped in certain modernist and utopian modes, and this article contributes to widening the range of possible relationships between people and the Arctic environment, using architecture as an aperture.


2017 ◽  
Vol 26 (2) ◽  
pp. 171-189 ◽  
Author(s):  
Alexander Sergunin ◽  
Valery Konyshev

2013 ◽  
Vol 5 (1) ◽  
pp. 155-163 ◽  
Author(s):  
M. Maturilli ◽  
A. Herber ◽  
G. König-Langlo

Abstract. A consistent meteorological dataset of the Arctic site Ny-Ålesund (11.9° E, 78.9° N) spanning the 18 yr-period 1 August 1993 to 31 July 2011 is presented. Instrumentation and data handling of temperature, humidity, wind and pressure measurements are described in detail. Monthly mean values are shown for all years to illustrate the interannual variability of the different parameters. Climatological mean values are given for temperature, humidity and pressure. From the climatological dataset, we also present the time series of annual mean temperature and humidity, revealing a temperature increase of +1.35 K per decade and an increase in water vapor mixing ratio of +0.22 g kg−1 per decade for the given time period, respectively. With the continuation of the presented measurements, the Ny-Ålesund high resolution time series will provide a reliable source to monitor Arctic change and retrieve trends in the future. The relevant data are provided in high temporal resolution as averages over 5 (1) min before (after) 14 July 1998, respectively, placed on the PANGAEA repository (doi:10.1594/PANGAEA.793046). While 6 hourly synoptic observations in Ny-Ålesund by the Norwegian Meteorological Institute reach back to 1974 (Førland et al., 2011), the meteorological data presented here cover a shorter time period, but their high temporal resolution will be of value for atmospheric process studies on shorter time scales.


2012 ◽  
Vol 5 (2) ◽  
pp. 1057-1076 ◽  
Author(s):  
M. Maturilli ◽  
A. Herber ◽  
G. König-Langlo

Abstract. A consistent meteorological dataset of the Arctic site Ny-Ålesund (11.9° E, 78.9° N) spanning the 18-yr-period 1 August 1993 to 31 July 2011 is presented. Instrumentation and data handling of temperature, humidity, wind and pressure measurements are described in detail. Monthly mean values are shown for all years to illustrate the interannual variablity of the different parameter. Climatological mean values are given for temperature, humidity and pressure. From the climatological dataset, we also present the time series of annual mean temperature and humidity, revealing a temperature increase of +1.35 K per decade and an increase in water vapor mixing ratio of +0.22 g kg−1 per decade for the given time period, respectively. With the continuation of the presented measurements, the Ny-Ålesund high resolution time series will provide a reliable source to monitor Arctic change and retrieve trends in the future. The relevant data are provided in high temporal resolution as averages over 5 [1] min before [after] 14 July 1998, respectively, placed on the PANGAEA repository (http://doi.pangaea.de/10.1594/PANGAEA.793046). While synoptic observations by the Norwegian Meteorological Institute reach back to 1935 (Førland et al., 2011), the meteorological data presented here cover a shorter time period, but their high temporal resolution will be of value for atmospheric process studies on shorter time scales.


Author(s):  
Mark C. Serreze ◽  
Roger G. Barry

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