Fjord–shelf exchanges controlled by ice and brine production: The interannual variation of Atlantic Water in Isfjorden, Svalbard

Nilsen, Frank; Cottier, Finlo; Skogseth, Ragnheid; Mattsson, Sven Erik

doi:10.1016/j.csr.2008.04.015

Cited by 222 publications

(284 citation statements)

References 18 publications

Supporting

Mentioning

276

Contrasting

Unclassified

Order By: Relevance

“…This upwelling of colder water coincided with a shallower chlorophyll maximum and an elevation of the zooplankton sound scattering layer in that area (unpublished data). Also, Nilsen et al (2008) describe rotational dynamics as an important factor for hydrographic forcing in the Isfjorden system, with water masses flowing in along the southern and out along the northern side.…”

Section: Discussionmentioning

confidence: 99%

Variability inCalanusspp. abundance on fine- to mesoscales in an Arctic fjord: implications for little auk feeding

Vogedes¹,

Eiane

Båtnes

et al. 2014

Marine Biology Research

View full text Add to dashboard Cite

We studied the abundance of calanoid copepods of the genus Calanus in a high-resolution sampling grid located in the vicinity of a breeding colony of an avian Calanus predator, the little auk (Alle alle) in an Arctic fjord (Isfjorden, Svalbard) in July 2007. Within diving reach of little auks, all copepodite stages of C. finmarchicus, as well as stages CIIIÁCV of C. glacialis, were recorded in all 26 stations sampled. Spatial autocorrelation analysis was used to detect spatial heterogeneity (patches) in the distribution of Calanus spp. Positive spatial autocorrelation was detected on scales up to 1.2 km for C. finmarchicus stages CIIIÁCV and for C. glacialis CIV and CV, but was rarely detected for the younger stages. This suggests that the tendency to form patches varies with ontogeny in Calanus spp. At an adjacent little auk colony, the diet prey composition from 30 gular pouches of little auks returning from feeding trips was investigated. Calanus glacialis CIV and CV were numerically dominant in the prey samples, while C. finmarchicus CIV which was dominant in the net samples did not contribute to the little auk diet. This could suggest selective feeding, a detection of patches beyond the scale of our survey, feeding beyond the sampling area or a combination of these factors. Large Calanus abundance differences within the sampling grid underline the necessity of a proper choice of grid size, in this case 2 km between stations.

show abstract

Section: Discussionmentioning

confidence: 99%

Variability inCalanusspp. abundance on fine- to mesoscales in an Arctic fjord: implications for little auk feeding

Vogedes¹,

Eiane

Båtnes

et al. 2014

Marine Biology Research

View full text Add to dashboard Cite

show abstract

“…From the northeastern to southeastern sector, it is close to the hum− mock tundra, which is regularly flooded with thawing water from snow patches and several glacier rivers. Another important feature of Petuniabukta is the pres− ence of seasonal sea ice cover (mainly fast−ice and open drift ice) usually occurring from December to May (Nilsen et al 2008). As the AWS was located 500 metres from the coastline, winds from the southeast to east represented the airflow from the fjord.…”

Section: Study Areamentioning

confidence: 99%

Weather patterns of the coastal zone of Petuniabukta, central Spitsbergen in the period 2008–2010

Láska¹,

Witoszová²,

Prošek³

2012

Polish Polar Research

View full text Add to dashboard Cite

This paper presents the first results of measurements of global solar radiation, albedo, ground surface and 2−m air temperature, relative humidity, and wind speed and di− rection carried out in the central part of Spitsbergen Island in the period 2008-2010. The study site was located on the coastal ice−free zone of Petuniabukta (north−western branch of Billefjorden), which was strongly affected by local topography, character of the ground sur− face, and sea ice extent. Temporal analysis of the selected meteorological parameters shows both strong seasonal and inter−diurnal variation affected by synoptic−scale weather systems, channelling and drainage effects of the fjords and surrounding glaciers. The prevailing pat− tern of atmospheric circulation primarily determined the variation in global solar radiation, wind speed, ground surface and 2−m air temperatures. Furthermore, it was found that ther− mal differences between Petuniabukta and the nearest meteorological station (Svalbard Lufthavn) differ significantly due to differences in sea ice concentrations and ice types in the fjords during the winter and spring months.

show abstract

“…The land cover grades with altitude from tundra vegetation in the coastal zone of Petuniabukta to bare soil and sedimentary rocks (Prach et al 2012;Szpikowski et al 2014). Snow covers the coastal zone from October to early summer (Láska et al 2012) and seasonal sea ice, mainly as fast ice or open drift ice, usually occurs from December to May (Nilsen et al 2008). The intensity of incoming solar radiation in Petuniabukta is close to zero from the end of October to the first part of February, while the average monthly temperature varies between -17 to 7°C (Láska et al 2012).…”

Section: Study Areamentioning

confidence: 99%

Air temperature variability in the vertical profile over the coastal area of Petuniabukta, central Spitsbergen

Ambrožová¹,

Láska²

2017

Polish Polar Research

View full text Add to dashboard Cite

Abstract:A two-year-long data set of air temperature from four different altitudes above Petuniabukta, central Spitsbergen, was analysed in order to assess the near-surface temperature lapse rates and the relative frequency of air temperature inversion occurrence. From August 2013 to July 2015, air temperatures at adjacent altitudes in Petuniabukta were strongly correlated. The near-surface lapse rates in all three layers differed significantly both from the average lapse rate in the international standard atmosphere (0.65°C 100 m -1 ) and the lapse rate calculated by linear regression. A pronounced annual cycle was detected in the lowermost air layer (from 23 to 136 m a.s.l.) with a variable near-surface lapse rate in the winter months, while an annual cycle was not apparent in the air layers above 136 m a.s.l. The lowermost layer was also characterized by a notable daily cycle in near-surface lapse rate in spring and autumn. Air temperature inversions occurred in up to 80% of the study period in the air layer below 136 m a.s.l., with the relative frequency being much lower in the other two air layers. The air temperature inversions lasted as long as 139 hours. A case study revealed that one of the strongest air temperature inversions was connected to an area of lower pressure gradients at the 850-hPa pressure level.

show abstract

Fjord–shelf exchanges controlled by ice and brine production: The interannual variation of Atlantic Water in Isfjorden, Svalbard

Cited by 222 publications

References 18 publications

Variability inCalanusspp. abundance on fine- to mesoscales in an Arctic fjord: implications for little auk feeding

Variability inCalanusspp. abundance on fine- to mesoscales in an Arctic fjord: implications for little auk feeding

Weather patterns of the coastal zone of Petuniabukta, central Spitsbergen in the period 2008–2010

Air temperature variability in the vertical profile over the coastal area of Petuniabukta, central Spitsbergen

Contact Info

Product

Resources

About