Isabel Caballero

Isabel Caballero
Spanish National Research Council | CSIC

PhD
Postdoctoral researcher

About

65
Publications
17,087
Reads
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844
Citations
Introduction
Isabel Caballero de Frutos currently works as Principal Investigator of the Sen2Coast Project at the Institute of Marine Sciences of Andalusia (ICMAN), which belongs to the National Research Council in Spain (CSIC). Isabel does research in remote sensing, oceanography, coastal management, bathymetry estimation, water quality and climate change.
Additional affiliations
September 2019 - present
MARINE SCIENCE INSTITUTE OF ANDALUSIA (ICMAN-CSIC)
Position
  • PostDoc Position
June 2017 - February 2019
National Oceanic and Atmospheric Administration
Position
  • PostDoc Position
February 2016 - January 2017
Spanish National Research Council
Position
  • PostDoc Position
Education
February 2015 - February 2015
University of Granada
Field of study
  • Ph.D in Science
January 2008 - January 2009
University of Cadiz
Field of study
  • Quality Master´s Postgraduate Course in Oceanography, Science and Sustainable Development
September 2004 - December 2005
University of Santander
Field of study
  • Master´s Degree in Integrated Coastal Zone Management, Hydraulic Institute

Publications

Publications (65)
Article
Full-text available
Uncrewed Aerial Systems (UAS) and satellites are used for monitoring and assessing the quality of surface waters. Combining both sensors in a joint tool may scale local water quality retrieval models to regional and global scales by translating UAS-based models to satellite imagery. The main objective of this study is to examine whether Sentinel-2...
Article
Full-text available
Remote sensing has evolved as an alternative to traditional techniques in the spatio-temporal monitoring of the Antarctic ecosystem, especially with the rapid expansion of the use of Unmanned Aerial Vehicles (UAVs), providing a centimeter-scale spatial resolution. In this study, the potential of a high-spatial resolution multispectral sensor embedd...
Article
Full-text available
Monitoring for assessment of natural disasters, such as volcanic eruptions, presents a methodological challenge for the scientific community. Here, we present Unmanned Aerial Vehicles (UAVs) as a feasible, precise, rapid and safe tool for real time monitoring of the impacts of a volcanic event during the Cumbre Vieja eruption on La Palma Island, Sp...
Poster
Full-text available
Las Floraciones Algales Nocivas (FANs) son eventos comunes en las zonas costeras y aguas interiores, producidas por el aporte de nutrientes al agua (N y P) y las altas temperaturas (Gilbert y Burkholder, 2006), y en las últimas décadas están sufriendo un incremento en su frecuencia y extensión afectando a la economía local (Gobler, 2020). Suponen u...
Article
Full-text available
During recent years, several eutrophication processes and subsequent environmental cri-ses have occurred in Mar Menor, the largest hypersaline coastal lagoon in the Western Mediterra-nean Sea. In this study, the Landsat-8 and Sentinel-2 satellites are jointly used to examine the evolution of the main water quality descriptors during the latest ecol...
Conference Paper
Full-text available
More than 60% of the world's population lives near coastal zones. These are the most productive as well as the most vulnerable ecosystems in the world. Considering these, among other factors, the study of coastal zones is a matter of vital importance, so that it is necessary to have accurate information for an appropriate coastal management. The sh...
Article
Full-text available
Estuarine degradation is a major concern worldwide, and is rapidly increasing due to anthropogenic pressures. The Mediterranean Guadiaro estuary, located in San Roque (Cadiz, Spain), is an example of a highly modified estuary, showing severe negative effects of eutrophication episodes and beach erosion. The migration of its river mouth sand spit ca...
Article
Full-text available
In this study, seawater quality was monitored with high-resolution satellite imagery during the 2021 volcanic eruption (September–December) on La Palma Island (Spain), the longest recorded in the history of the island, and the most destructive in the last century in Europe. The Sentinel-2A/B twin satellites and Landsat-8 satellite were jointly used...
Article
Full-text available
Mapping bathymetric change is a core task for a wide range of navigation, research, monitoring, and design applications. Satellite-derived bathymetry (SDB) can support this activity, particularly when using data from a platform, like the Sentinel-2A/B twin mission of the Copernicus programme, which provides routine and repetitive image acquisition...
Article
Full-text available
Laguna Lake, the largest freshwater lake in the Philippines, is permanently subject to nutrient-driven eutrophication and pollution and experiences harmful algal blooms (cyanoHABs) periodically with serious socio-economic implications. The aim of this study is to evaluate the suitability of the Sentinel-2 imagery of the European Commission’s Copern...
Presentation
This study aimed at evaluating the ACOLITE atmospheric correction processor in order to develop a regional turbidity model for the Guadalquivir estuary (southern Spain) and its adjacent coastal region using Sentinel-2 imagery at a 10 m spatial resolution. Two settings for the atmospheric correction algorithm within the ACOLITE software were applied...
Conference Paper
Full-text available
Remote sensing techniques are becoming a key tool for coastal mapping in terms of resolution, effectiveness and cost reduction. Sentinel-2A/B twin satellites are part of the free and open policy programme available since 2015, but atmospheric corrections or cloud cover are still challenges to face. In order to process this data, cloud computing pla...
Article
Full-text available
Human mobilization during the COVID-19 lockdown has been reduced in many areas of the world. Maritime navigation has been affected in strategic connections between some regions in Patagonia, at the southern end of South America. The purpose of this research is to describe this interruption of navigation using satellite synthetic aperture radar data...
Article
During the southern summer of 2020, large phytoplankton blooms were detected using satellite technology in Chile (western Patagonia), where intensive salmonid aquaculture is carried out. Some harvesting sites recorded massive fish mortalities, which were associated with the presence of the dinoflagellate species Cochlodinium sp. The bloom included...
Article
Full-text available
The increased frequency of harmful algal blooms (HABs) is a major environmental concern worldwide, resulting not only in increased treatment costs for drinking water but also in impacts on tourism, commercial fishing and aquaculture and risks to human and animal health. Traditional strategies with ship-based approaches based on field sampling and l...
Article
Full-text available
Different atmospheric correction (AC) procedures for Sentinel-2 satellites are evaluated for their effectiveness in retrieving consistent satellite-derived bathymetry (SDB) over two islands in the Caribbean (Buck and Culebra). The log-ratio method for SDB, which allows use of minimal calibration information from lidar surveys (25 points in this stu...
Presentation
Meghna Estuary is a very complex and dynamic estuarine system because of its irregular shape, wide seasonal variation and the changing role of tides. Every year, a major portion of the flow laden with high amount of sediments from the Ganges-Brahmaputra-Meghna river system are transferred through this estuary to the Bay of Bengal (BoB). The purpose...
Article
Full-text available
Satellite-Derived Bathymetry (SDB) has significant potential to enhance our knowledge of Earth's coastal regions. However, SDB still has limitations when applied to the turbid, but optically shallow, nearshore regions that encompass large areas of the world's coastal zone. Turbid water produces false shoaling in the imagery, constraining SDB for it...
Article
Full-text available
Global Fishing Watch and VIIRS-DNB (visible infrared imaging radiometer suite day/night band) signals are compared for the jigger fleet in FAO (Food and Agriculture Organization of the United Nations) Major Fishing Area 41 during the maximum feasible time span (2012–2018). Both signals have shown a high degree of consistency at all temporal and spa...
Article
Full-text available
Flooding is among the most common natural disasters in our planet and one of the main causes of economic and human life loss worldwide. Evidence suggests the increase of floods at European scale with the Mediterranean coast being critically vulnerable to this risk. The devastating event in the West Mediterranean during the second week of September...
Article
Full-text available
This study examines the relatively high-resolution MultiSpectral Instrument (MSI) onboard Sentinel-2A and 2B for generating bathymetric maps through a ratio transform model in South Florida (United States). Atmospheric correction of imagery is implemented though ACOLITE software, providing accurate performance and consistency over different Sentine...
Article
Full-text available
Evaluation of the impact of turbidity on satellite-derived bathymetry (SDB) is a crucial step for selecting optimal scenes and for addressing the limitations of SDB. This study examines the relatively high-resolution MultiSpectral instrument (MSI) onboard Sentinel-2A (10–20–60 m) and the moderate-resolution Ocean and Land Color instrument (OLCI) on...
Article
Full-text available
In this study, we apply high-resolution Sentinel-2A imagery to assist in the monitoring of the southwestern Spanish coast during its first year of data. The aim is to test suitability of MultiSpectral Imager (MSI) at higher resolution (10 m) for mapping Total Suspended Solids (TSS). Several field campaigns are carried out to collect TSS at three di...
Article
Full-text available
The aim of this study is to propose the use of a functional data analysis approach as an alternative to the classical statistical methods most commonly used in oceanography and water quality management. In particular we consider the prediction of total suspended solids (TSS) based on remote sensing (RS) data. For this purpose several functional lin...
Article
High concentrations of suspended solids in coastal waters directly affect numerous processes. In the case of the marine region influenced by the Guadalquivir estuary, turbidity is one of the primary factors affecting this complex ecosystem and its adjacent coastal region. Ten-year (2002–2012) ocean color observations from the MEdium Resolution Imag...
Article
High Amplitude Internal Waves (HAIWs) are physical processes observed in the Strait of Gibraltar (the narrow channel between the Atlantic Ocean and the Mediterranean Sea). These internal waves are generated over the Camarinal Sill (western side of the strait) during the tidal outflow (toward the Atlantic Ocean) when critical hydraulic conditions ar...
Article
Dredging activities in estuaries frequently cause deleterious environmental effects on the water quality which can impact flora, fauna, and hydrodynamics, among others. A medium- and high-resolution satellite-based procedure is used in this study to monitor turbidity plumes generated during the dredging operations in the Guadalquivir estuary, a maj...
Conference Paper
Functional models are used to analyse data defined on a continuum such as dense time interval or space [1]. They consider the continuous structure of the data and have many advantages comparing to the ordinary statistical models [2]. In this paper, the spectral data collected from remote sensors were handled as functional data and the concentration...
Article
Full-text available
During the last two decades, several satellite algorithms have been proposed to retrieve information about phytoplankton groups using ocean color data. One of these algorithms, the so-called PHYSAT-Med, was developed specifically for the Mediterranean Sea due to the optical peculiarities of this basin. The method allows the detection from ocean col...
Conference Paper
Predicting ocean characteristic parameters such as Sea Surface Temperature (SST), Chlorophyll-a content (Chl-a) and Total Suspended Solids (TSS) from Remote Sensing (RS) data is important since it is time saving and less expensive compared to collecting samples and measuring the related characteristics. The aim of this study is to predict the amoun...
Article
A forest fire started on August 8th, 2016 in several places on Madeira Island causing damage and casualties. As of August 10th the local media had reported the death of three people, over 200 people injured, over 950 habitants evacuated, and 50 houses damaged. This study presents the preliminary results of the assessment of several spectral indices...
Chapter
Remote Sensing (RS) data obtained from satellites are a type of spectral data which consist of reflectance values recorded at different wavelengths. This type of data can be considered as a functional data due to the continous structure of the spectrum. The aim of this study is to propose Functional Linear Regression Models (FLRMs) to analyze the t...
Article
Full-text available
A detailed study of the mechanisms generated through the turbidity plume and its variability at the Guadalquivir estuary has been carried out with remote sensing and in situ data. Several sensors with different characteristics have been required (spatial, temporal and spectral resolution), thereby providing information for a multi-sensor analysis....
Article
Full-text available
The use of in situ measurements is essential in the validation and evaluation of the algorithms that provide coastal water quality data products from ocean colour satellite remote sensing. Over the past decade, various types of ocean colour algorithms have been developed to deal with the optical complexity of coastal waters. Yet there is a lack of...
Chapter
Full-text available
The Guadalquivir estuary has an important place in history as mainland Europe’s most southern large river-estuary-delta system. Intensification of human pressure combined with a limited understanding of its functioning have resulted in increasing socio-economic and environmental conflicts over the estuary. Within this context, the existing scientif...
Article
Full-text available
The use of in situ measurements is essential in the validation and evaluation of the algorithms that provide coastal water quality data products from ocean colour satellite remote sensing. Over the past decade, various types of ocean colour algorithms have been developed to deal with the optical complexity of coastal waters. Yet there is a lack of...
Article
Extending the applications of satellite altimetry to the coastal zone requires validated, quality controlled data. We present a validation study in the Gulf of Cádiz (SW Iberian Peninsula), an area of relevant social, economic, and strategic importance. We compare against in-situ data seven years (Dec. 2002-Jan. 2010) of significant wave height (SW...
Article
This study examines the spatio-temporal variability of the turbidity plume and phytoplankton biomass (in terms of chlorophyll) in the marine region influenced by the Guadalquivir estuary using ocean colour images over a period of 11 years (20032013). The area of the turbidity plume was calculated using water-leaving radiance at 555 nm (nLw555). Cli...
Chapter
Full-text available
This study analyses the spatio-temporal variability of satellite surface chlorophyll-a data (CHL) and Sea Level Anomaly (SLA) from altimetry data in order to characterize the influence of the regional circulation on the phytoplankton biomass in the Gulf of Cadiz (Southwestern coast of the Iberian Peninsula). A singular value decomposition (SVD) ana...
Article
Full-text available
The temporal variability of hydrological variables in the Guadalquivir estuary was examined during three years through a real-time remote monitoring network (RTRM). The network was developed with the aim of studying the influence of hydrodynamical and hydrological features within the estuary on the functioning of the pelagic ecosystem. Completing t...
Article
Seasonal-to-interannual variability of the winter-spring bloom in the Gulf of Cádiz, eastern North Atlantic, has been investigated using chlorophyll-a remote sensing (CHL). These data have been obtained from the GlobColour project; the temporal coverage extends from September 1997 to December 2010. In this study we develop a generic quantitative ap...
Article
Full-text available
Satellite-borne sensors are an ideal tool for remotely assessing a number of water quality parameters that determine the functioning of aquatic ecosystems. For example, chlorophyll and total suspended solids in a body of water are critical variables for determining primary production and can help characterize nutrient loading and sediment dynamics....
Conference Paper
Full-text available
Estuarine environments are characterized by very complex and varied morphodynamics and are one of the most critical coastal zones for the exchange of sediment and pollutants. The fertilization role of the continental shelf of the Gulf of Cadiz (SW Iberian Peninsula) in which the estuary of the Guadalquivir and other rivers play an influential role,...
Conference Paper
Full-text available
During the last years, an increase in the intensity and frequency of floods in the SW of the Iberian Peninsula has occurred due to the storms rise. These phenomena coincide with negative North Atlantic Oscillation (NAO) phases, presenting a clear significant relationship between the climatic pattern that dominates the index variation and the flood...
Article
Full-text available
The mouth of the Guadiaro River (SW Spain), oriented in a NE-SW direction, is often closed, resulting in environmental, social, and economic problems. An analysis of the factors influencing this phenomenon was performed using the Coastal Modeling System, a numerical model based on the mild slope equation (waves, currents, and sediment transport), a...
Article
Full-text available
Algeciras Bay constitutes a physical environment of special characteristics, due to its bathymetric configuration and geographical location, at the eastern boundary of the Strait of Gibraltar. Hence, the Bay is subject to the complex hydrodynamics of the Strait of Gibraltar, characterized by a mesotidal, semidiurnal regime and the high density-stra...
Article
Full-text available
Las dunas costeras son sistemas arenosos de especial singularidad, situados en la transición entre el ambiente continental y el marino. Estos ecosistemas dunares no sólo representan una protección física contra la erosión del litoral actuando de reservorio de arena durante los grandes temporales, sino que también poseen una función ecológica única,...
Article
Full-text available
La erosión de las playas y el retroceso de la línea de costa se presenta como un hándicap a resolver para las administraciones con competencia. La actual problemática que presenta la escasez de fuentes de arena apta para regeneraciones de playa a lo largo del litoral español, conlleva a la búsqueda de yacimientos de arena marítimos mediante obras...