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Física ambiental



  • 2004-2007: Clouds and climate change: climatological analysis of cloudiness in the Iberian Peninsula, measurements and modelization of radiative effects at the surface (NUCLIER). (link)
  • 2004-2007: Hydrodynamic effects on the phytoplankton populations of reservoirs. Consequences for the water quality (link)
  • 2007-2009: Coupling observations and modelling or the dying Aral Sea / nato collaborative linkage grant (link)
  • 2008-2010: Spatial and temporal patterns of wetlands hydrodynamics. Consequences for water quality (link)
  • 2009-2011: New mesurements and modelling turbulent mixing (link)
  • 2007-2009: Clouds and climate change: variability and trends in cloudiness and sunshine in the Iberian Peninsula, measurement and modelling of radiative effects of clouds at the surface (NUCLIEREX)(link)
  • 2009: Biologic filtration of treated wastewater of a pilot plant in Empuriabrava WWTP. (link)
  • 2010-2014: Climate change and inland seas; phenomena, feedback and uncertainties. The physical science basis. (CLIMSEAS) (link)
  • 2015-2017: Participation in the projecte Western boundary retroflections: how the global-ocean-circulation valves work? (link)


 Clouds and climate change: climatological analysis of cludiness in the Iberian Peninsula, measurements and modelization of radiative effectes at the surface (NUCLIER)

Clouds are a key factor among the processes that control Earth climate,given their influence over the energy balance and the hydrological cycle. Establishing cloud contribution to climate change is a difficult issue because of the complexity of involved processes, the large amount of required information, and the uncertainty attached to available data. The present project will contribute to reducing these difficulties. In one hand, a cloud climatology for the Iberian Peninsula will be described. Significant trends in the amount and/or type of clouds during the last decades will be also investigated. On the other hand, the use of unidimensional radiative transfer models in describing the radiative effects of clouds will be studied. In order to carry out this study, a database with solar and infrared radiation measurements, and simultaneous sky observations, will be developed. Subsequently, we will suggest a methodology for using the models and improving the agreement between model estimates and experimental measurements, under any sky condition (cloudless, cloudy or overcast).

Financing organisation: Ministerio de Educación y Ciencia (CGL 2004-02325)

Josep Calbó Angril, IP
Josep-Abel González
Antoni Viúdez
Magda Llach
Javier Martín-Vide
Arturo Sánchez Lorenzo

Implementation period: 2004- 2007



 Hydrodynamic effects on the phytoplankton populations of reservoirs. Consequences for the water quality.

The majority of Mediterranean reservoirs are characterized by a canyon type structure that determines his hydrodynamics, to half a way between a lake and a river. In this project we will study the influence of the reservoir hydrodynamics on the phytoplankton dynamics. This is one of the most important parameters for the characterization of the water quality of the reservoir.
Periodic campaigns will be realized in the Sau and Boadella reservoirs and in Lake Banyoles in order to characterize the circulation patterns of these aquatic systems. Measurements of the temperature, the water current, the conductivity and the turbidity will be carried out at different scales. Chlorophyll-a will be also measured for the different species that form the phytoplankton. Physical and biological measurements will be correlated in order to differentiate the species of phytoplankton (diatoms, green algae, and cryptophytes), in relation with the flow. We will study the principal hydrological processes that determine the variability of these populations.
We will use different models (DLM, POM) to simulate the obtained results and we will propose strategies of management to improve the quality of the water.

Financing organisation: Ministerio de Educación y Ciencia (CGL2004-02027/HID)

Xavier Casamitjana, IP
Jordi Colomer
Elena Roget
Teresa Serra
Marianna Soler
Xavier Sánchez
Francesc Forcat
Javier Vidal

Implementation period: 2004- 2007



 Coupling observations and modelling of the dying aral sea / NATO collaborative linkage grant.

Until the 1960’s, Aral Sea was the World’s fourth largest inland reservoir. Since then, it has lost nearly 75% of its surface area, and the salinity has increased above 100 g/l. The Aral Sea desiccation has been declared by the United Nations as one of the worst anthropogenic ecological disasters ever known.
To develop a near-term environmental forecast for the Aral region, detailed hydrophysical and chemical measurements in the lake are needed. Since 2002, several field campaigns have been conducted in the Aral Sea by a research team of Institute of Oceanology Russian Academy of Sciences in cooperation with the Uzbek Institute of Geology and Geophysics in Tashkent. These campaigns together with associated international collaborations have been partly supported by NATO. As a logical extension of previous projects we seek to continue building-up the observational data base, and making the next step by coupling the observations and modeling efforts to achieve a new level of understanding of physical mechanisms that control the Aral Sea dynamics. During the new field campaigns of 2006-2007, we plan to conduct the total CTD and ADP coverage of the West and East basins and make turbulence measurements for the first time ever in the Aral Sea to test or develop mixing parameterizations under highly stratified conditions. Furthermore, we will use the newly obtained data and parameterizations to run a set of experiments with POM model aimed at getting new insight into physical mechanisms governing the present regime and future fate of the lake.
Within the project, two workshops will be held in Catalonia, Spain and in Tashkent, Uzbekistan. International workshop about Aral sea into UdG.

Financing organisation: OTAN (ESP.NR.NRCLG.982592)/ MEC (PCI2006-A9-0545)

Elena Roget, Co-IP
Valentina Khan
Sergey Dikarev
Alexander Grabovskiy
Anatoliy Ni
Timofei Kudyshkin
Irina Tomashevskaya
Abulgazi Kurbaniyazov
H.Joseph Fernando
Peter Zavialov, Co-IP
Iossif Lozovatsky, Co-IP

Implementation period: January 2007-January 2009



 Spatial and temporal patterns of wetlands hydrodynamics. Consequences for water quality.

The wetlands situated in the Mediterranean area are subjected to changing environmental and anthropogenic conditions ranging from local to global. Local are specified by characteristic meteorology, system morphology and management, and global are defined by the climate change. Actually, there is a lack of studies dealing with hydrodynamics of wetlands that can be used as a base for ecological studies that are working at the present time. Studies on hydrodynamics can explain the effects of emergent and submergible vegetation in the transport of sediments and distributions of phytoplankton in wetlands. Those are parameters that evaluate the water quality. This project deals with the understanding and determination of spatial and temporal patterns in the Rubina wetlands, which are situated in a natural park. Field campaigns will be designed at large and short scales with the purpose of characterize the hydrodynamics of areas with submerged and emergent vegetation, the sediment transport along the channel that distributes salty water from the sea into the wetland and the relationship between hydrodynamics and phytoplankton. The EPO related to the project is in charge of the Control of Mosquitoes in the Rubina wetland area and certainly expresses the necessity of research and management in the area, specially at controlling the blooms of mosquitoes related to the local variations of water depth within the wetland. The EPO is also interested in the characterization of the salty water intrusion into the wetland freshwater zone.

Financing organisation: Ministerio de Educación y Ciencia

Jordi Colomer, IP
Xavier Casamitjana
Jordi Colomer
Teresa Serra
Marianna Soler
Josep Pararols

Implementation period: 2008- 2010



 New mesurements and modelling turbulent mixing.

The expertise on turbulent measurements acquired by the group during the last years has been acquired on projects mostly focused on the study of the hydrodynamics of lakes and reservoirs. This project aims to optimize the knowledge of the group, placing advanced issues related to turbulent measurements at the core of this proposal in which the modeling of mixing dynamics in natural systems is also considered.
Activities undertaken under the project can be gathered into five main groups: 1) solving advanced open issues of data processing 2) establishing new platforms for measurements (uprising measurements and autonomous vehicles); 3) carrying out exhaustive campaigns sampling turbulence generated by different mechanisms (forcing mechanisms including shear field will also be measured); 4) statistically analyzing turbulence variables (fractal models and structure functions related to intermittency); and 5) using model simulations of measured dynamics considering both statistical properties of the turbulence and new closure schemes.
Students who participate in this project (either through bachelor- or master-level research projects or research grants) will have the opportunity to deal with instrumentation companies that develop field instrumentation and data analysis interfaces for non-expert users.

Financing organisation: Ministerio de Educación y Ciencia (CGL2008-03608)

Elena Roget, IP
Xavier Sánchez
Jesús Planella
Imma Bastida
Iossif Lozovatsky

Implementation period: 2009-2011



 Clouds and climate change: variability and trends in cloudiness and sunshine in the iberian peninsula, measurement and modelling of radiative effects of clouds at the surface (NUCLIEREX).

The project, extending the previous NUCLIER project, focusing on the one hand the description of long-term behavior in the past, cloudiness and sunshine, and in particular the phenomenon known as "dimming-brightening. "on the other hand, aims to contribute to knowledge of the behavior of solar radiation and atmospheric situations in various state of the sky, particularly in the presence of clouds. The studies are based on historical data collected at weather stations, but also in the analysis of measurements made by instruments himself (radiometers, ceilòmetre, camera observation of the sky,...) and the use of radiative transfer models as a tool of analysis.

Financing organisation: Ministerio de Educación y Ciencia (CGL 2007-62664/CLI)

Josep Calbó, IP
Josep-Abel González
Jordi Badosa
Antoni Viúdez
Montserrat Costa
Javier Martin-Vide
Salvador Matamoros
Arturo Sánchez-Lorenzo

Implementation period: 2007-2009



 Biologic filtration of treated wastewater of a pilot plant in empuriabrava WWTP.

In agreement with the Consortium of the Costa Brava is to analyze the water quality in a system Mesocosmos by biological filtration by zooplankton Daphnia population. This method of filtration is new and may have projections both from the scientific point of view and from a practical point of view. Studied the effects of physical factors (light, temperature and conductivity) on the population and how this reduces the turbidity of the water. In the future, is to compare the effectiveness with other filtration systems currently used.



Financing organisation: EMEC (PET_2008_0302)

Implementation period: 2009



 Climate change and inland seas; phenomena, feedback and uncertainties. The physical science basis. (CLIMSEAS)

This project, coordinated by the Environmental Physics Group and funded by the European Commission, involves a total of 40 researchers: the University of Girona and other universities or research centers in the United Kingdom, Russia and the United States of America . The ultimate goal of this program, which lasts 4 years, is to create an international network working on the issue of climate change on regions with lakes and inland seas as they are particularly sensitive to changing environments and therefore can provide key information about global climate change.


Web of the project

Financing organisation: European Comission (FP7-IRSES2009-247512)

Implementation period: June 2010 - June 2014