Numerical study of the role of wind forcing and freshwater buoyancy input on the circulation in a shallow embayment (Gulf of Trieste, Northern Adriatic Sea)

Querin, Stefano; Crise, A.; Deponte, Davide; Solidoro, Cosimo

doi:10.1029/2006jc003611

Cited by 37 publications

(52 citation statements)

References 28 publications

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“…This event is represented by a significant peak in the third EOF mode amplitude (Figure 9c). In situ observations in the water column [Querin et al, 2006] revealed that the strong winds cooled the GoT and mixed the water all the way down to the bottom, breaking temporarily the stratification. The latter was not reestablished before 1 July, that is, 5 days later.…”

Section: Smentioning

confidence: 99%

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Spatial and temporal variability of the sea surface temperature in the Gulf of Trieste between January 2000 and December 2006

2008

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[1] The variability of the sea surface temperature (SST) of the Gulf of Trieste (northeastern Adriatic Sea) is studied using satellite observations spanning 2000-2006. After interpolation and validation of the SST data with in situ observations near Trieste, the satellite data are used to compute various statistical estimates (7-year, yearly and monthly means and empirical orthogonal functions modes). The main results obtained are: 1. The SST in the Gulf of Trieste is mostly variable at the seasonal scale, with temperature differences between summer and winter of $14 and $16°C in the northern and southern areas, respectively. The larger seasonal variations in the northern section are related to the Isonzo and Tagliamento river runoffs and to its shallower bathymetry. In the mean, the meridional SST difference between north and south is only $2°C. 2. Significant interannual variations are observed, with winter 2001 and summer 2003 showing the largest monthly anomalies (2-3°C). Most of the seasonal and interannual variations are related to variability in the local heat flux with a time lag of about 2 months. No robust long-term cooling/warming trend is apparent in the observations. 3. The spatial structure of the SST in the Gulf is affected by the Isonzo and Tagliamento rivers (to the north), the warmer Adriatic water (to the south), the nonuniform warming in spring and wind induced mixing and cooling (to the east). The latter effect is mostly in the form of rapid temperature changes triggered by strong Bora events.Citation: Mauri, E., P.-M. Poulain, and G. Notarstefano (2008), Spatial and temporal variability of the sea surface temperature in the Gulf of

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Section: Smentioning

confidence: 99%

“…However, this circulation can be reversed under Bora winds. In summer 2002, a specific event of Bora during stratified conditions was studied numerically by Querin et al [2006]. In this study, satellite and in situ measurements along with numerical experiments show that strong wind events mix the water and homogenize the entire water column in a few hours.…”

mentioning

confidence: 97%

Spatial and temporal variability of the sea surface temperature in the Gulf of Trieste between January 2000 and December 2006

2008

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“…The Gulf experiences annual fluctuations of temperature varying from 5°C to > 24°C at the surface and from 6 °C to >20°C at the bottom. The general pattern of currents in the Gulf may be rapidly modified in response to intense local atmospheric forcing (winds) and river plume (Querin et al, 2007;Malačič & Petelin, 2009). The region is highly influenced by the Bora, a north-easterly wind characterized by strong intensity that is able to mix the entire water column also due to the shallow depth of the basin (Querin et al, 2007).…”

Section: Study Sitementioning

confidence: 99%

“…The general pattern of currents in the Gulf may be rapidly modified in response to intense local atmospheric forcing (winds) and river plume (Querin et al, 2007;Malačič & Petelin, 2009). The region is highly influenced by the Bora, a north-easterly wind characterized by strong intensity that is able to mix the entire water column also due to the shallow depth of the basin (Querin et al, 2007). The dominant sediment type in the Gulf is sandy-mud but the composition of soft bottoms can vary from sands with patches of rocks to detrital mud (Brambati & Catani, 1988).…”

Section: Study Sitementioning

confidence: 99%

Biodiversity, feeding habits and reproductive strategies of benthic macrofauna in a protected area of the northern Adriatic Sea: a three-year study

et al. 2017

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The macrozoobenthic community at a sublittoral station located in the Marine Protected Area of Miramare, Gulf of Trieste (Italy) was investigated monthly from June 2002 to July 2005. Community variables were studied and related to food sources (particulate, total and biopolymeric carbon contents, benthic microalgae and meiofauna). In addition, the macrofaunal response to a heatwave that occurred in summer 2003 in the area was also explored. Univariate and multivariate analyses highlighted that the macrozoobenthic community structure shifted towards the end of the study. Diversity remained fairly stable throughout the study, despite the high turnover values. From a dominance of short-lived invertebrates related to irregular fresh organic matter inputs, the community shifted toward long-lived taxa, principally related to an increase of biopolymeric C and microalgal biomass. Semelparous invertebrates seem to be less resistant to high temperatures compared to iteroparous ones. The latter proved to be capable competitors since they prevailed over the semelparous species towards the end of the study.The community exhibited a certain degree of resistance to high temperature, due to the adaptation of the macrofaunal invertebrates to this particular stress, induced by the wide natural fluctuations in temperature that occur on a seasonal basis in the Gulf of Trieste. This study highlights the importance of long datasets to assess the state and ecological processes of the macrofaunal communities.

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“…As in Querin et al (2006), the rivers are included by introducing small channels in the bathymetry that simulate the river bed close to the coast. Velocity is imposed at the upstream end of each channel, with the prescribed discharge rate being obtained by multiplying the velocity by the cross sectional area of the channel.…”

Section: Mitgcmmentioning

confidence: 99%

Investigation of model capability in capturing vertical hydrodynamic coastal processes: a case study in the north Adriatic Sea

et al. 2016

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Abstract. In this work we consider a numerical study of hydrodynamics in the coastal zone using two different models, SHYFEM (shallow water hydrodynamic finite element model) and MITgcm (Massachusetts Institute of Technology general circulation model), to assess their capability to capture the main processes. We focus on the north Adriatic Sea during a strong dense water event that occurred at the beginning of 2012. This serves as an interesting test case to examine both the models strengths and weaknesses, while giving an opportunity to understand how these events affect coastal processes, like upwelling and downwelling, and how they interact with estuarine dynamics. Using the models we examine the impact of setup, surface and lateral boundary treatment, resolution and mixing schemes, as well as assessing the importance of nonhydrostatic dynamics in coastal processes. Both models are able to capture the dense water event, though each displays biases in different regions. The models show large differences in the reproduction of surface patterns, identifying the choice of suitable bulk formulas as a central point for the correct simulation of the thermohaline structure of the coastal zone. Moreover, the different approaches in treating lateral freshwater sources affect the vertical coastal stratification. The results indicate the importance of having high horizontal resolution in the coastal zone, specifically in close proximity to river inputs, in order to reproduce the effect of the complex coastal morphology on the hydrodynamics. A lower resolution offshore is acceptable for the reproduction of the dense water event, even if specific vortical structures are missed. Finally, it is found that nonhydrostatic processes are of little importance for the reproduction of dense water formation in the shelf of the north Adriatic Sea.

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Numerical study of the role of wind forcing and freshwater buoyancy input on the circulation in a shallow embayment (Gulf of Trieste, Northern Adriatic Sea)

Cited by 37 publications

References 28 publications

Spatial and temporal variability of the sea surface temperature in the Gulf of Trieste between January 2000 and December 2006

Spatial and temporal variability of the sea surface temperature in the Gulf of Trieste between January 2000 and December 2006

Biodiversity, feeding habits and reproductive strategies of benthic macrofauna in a protected area of the northern Adriatic Sea: a three-year study

Investigation of model capability in capturing vertical hydrodynamic coastal processes: a case study in the north Adriatic Sea

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