35 research outputs found
Enhanced turbulence driven by mesoscale motions and flow-topography interaction in the Denmark Strait Overflow plume
The Denmark Strait Overflow (DSO) contributes roughly half to the total volume transport of the Nordic overflows. The overflow increases its volume by entraining ambient water as it descends into the subpolar North Atlantic, feeding into the deep branch of the Atlantic Meridional Overturning Circulation. In June 2012, a multiplatform experiment was carried out in the DSO plume on the continental slope off Greenland (180 km downstream of the sill in Denmark Strait), to observe the variability associated with the entrainment of ambient waters into the DSO plume. In this study, we report on two high-dissipation events captured by an autonomous underwater vehicle (AUV) by horizontal profiling in the interfacial layer between the DSO plume and the ambient water. Strong dissipation of turbulent kinetic energy of O( math formula) W kg−1 was associated with enhanced small-scale temperature variance at wavelengths between 0.05 and 500 m as deduced from a fast-response thermistor. Isotherm displacement slope spectra reveal a wave number-dependence characteristic of turbulence in the inertial-convective subrange ( math formula) at wavelengths between 0.14 and 100 m. The first event captured by the AUV was transient, and occurred near the edge of a bottom-intensified energetic eddy. Our observations imply that both horizontal advection of warm water and vertical mixing of it into the plume are eddy-driven and go hand in hand in entraining ambient water into the DSO plume. The second event was found to be a stationary feature on the upstream side of a topographic elevation located in the plume pathway. Flow-topography interaction is suggested to drive the intense mixing at this site
Upwelling events, coastal offshore exchange, links to biogeochemical processes - Highlights from the Baltic Sea Sciences Congress at Rostock University, Germany, 19-22 March 2007
The Baltic Sea Science Congress was held at Rostock University, Germany, from 19 to 22 March 2007. In the session entitled"Upwelling events, coastal offshore exchange, links to biogeochemical processes" 20 presentations were given,including 7 talks and 13 posters related to the theme of the session.This paper summarises new findings of the upwelling-related studies reported in the session. It deals with investigationsbased on the use of in situ and remote sensing measurements as well as numerical modelling tools. The biogeochemicalimplications of upwelling are also discussed.Our knowledge of the fine structure and dynamic considerations of upwelling has increased in recent decades with the advent ofhigh-resolution modern measurement techniques and modelling studies. The forcing and the overall structure, duration and intensity ofupwelling events are understood quite well. However, the quantification of related transports and the contribution to the overall mixingof upwelling requires further research. Furthermore, our knowledge of the links between upwelling and biogeochemical processes is stillincomplete. Numerical modelling has advanced to the extent that horizontal resolutions of c. 0.5 nautical miles can now be applied,which allows the complete spectrum of meso-scale features to be described. Even the development of filaments can be describedrealistically in comparison with high-resolution satellite data.But the effect of upwelling at a basin scale and possible changes under changing climatic conditions remain open questions
The (re)location of Coworking Spaces in Ukraine During the Russian Invasion
A significant part of all firms tends to remain in the same location
throughout their lives. Firm birth, death, and relocation are part of firm demography. Firm location, birth, and death are driven by several pull and push factors
which also include exogenous shocks such as a foreign invasion. This paper aims to
present and discuss the location of coworking spaces in Ukraine during the first year
of the Russian Invasion. Several coworking spaces closed down in the Kyiv region,
and others have opened in the western part of the country. The motivations driving
the choice of location of three new coworking spaces in western areas are presented
through interviews with the coworking spaces managers, and the role played by the
coworking spaces community discusse
Experiencing disruption and transformation of communal environments: War’s influence on Ukrainian coworking spaces
In light of the Russian–Ukrainian conflict, this study explores the transformation and resilience of Ukrainian coworking spaces amid significant social disruptions, contrasting war-driven changes with those prompted by other exogenous shocks like the coronavirus disease (COVID-19) pandemic. Utilising problem-centred interviews and co-constructed autoethnographic narratives, we probe the evolving roles and organisational shifts these spaces undergo. Despite adversity, they have showcased resilience, adaptability and in most part remained functional. This research illuminates the transformative nature of community-based work environments, paving the way for the development of innovative coworking models resilient to diverse social disruptions