Article
Environmental Sciences
Luka Rumora, Mario Miler, Damir Medak
Summary: This study compared radiometric indices from Landsat 8 and Sentinel-2, finding no significant difference in NDVI values and a strong correlation between the two datasets, indicating that values from both sources can be combined.
GEOCARTO INTERNATIONAL
(2021)
Article
Environmental Sciences
Xavier Pons, Joan-Cristian Padro
Summary: This study focuses on the recovery of information from shadowed pixels in RGB or multispectral imagery sensed from unmanned aerial vehicles (UAVs) using the concept of spectral reflectance and empirical line techniques.
Article
Environmental Sciences
Hongye Cao, Ling Han, Liangzhi Li
Summary: This study evaluates the potential of integrating surface reflectance data from Landsat-7, Landsat-8, and Sentinel-2. A cross-sensor conversion model is proposed to adjust the Sentinel-2 reflectance values to match Landsat-7 or Landsat-8, reducing the discrepancy in surface reflectance. The study suggests that it is feasible to integrate these datasets by applying a linear regression correction between the bands.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Environmental Sciences
Rula Sa, Wenyi Fan
Summary: Accurate measurement of aboveground biomass and other forest characteristics is crucial for evaluating forest quality and carbon stocks. This study uses Landsat 8 and Sentinel-2A sensors to analyze the response differences between their bands and establishes suitable weights for vegetation index using spectral indices, normalization, and ratio techniques to improve saturation effect. Texture features are also analyzed, and a new texture index is proposed to better estimate vegetation parameters. The results show that Sentinel-2A and Landsat 8 are promising remote sensing datasets for assessing forest resources at a regional scale.
Article
Geochemistry & Geophysics
Philippe Rufi, David Frantz, Lin Yan, Patrick Hostert
Summary: Geometric misalignment and multitemporal inconsistency between Landsat and Sentinel-2 data sets require operational coregistration for multitemporal analysis. Modification of the LSReg algorithm enables automatic coregistration of large volumes of Sentinel-2 imagery with Landsat base images, improving geometric consistency and reducing time series noise in Sentinel-2 data sets.
IEEE GEOSCIENCE AND REMOTE SENSING LETTERS
(2021)
Article
Environmental Sciences
Pramaditya Wicaksono, Ignatius Salivian Wisnu Kumara, Muhammad Afif Fauzan, Rifka Noviaris Yogyantoro, Wahyu Lazuardi
Summary: This study modeled benthic habitat biodiversity indices in shallow waters of the Karimunjawa Islands, Indonesia using a remote sensing approach. The results show that multispectral remote sensing images can be used to map benthic habitat biodiversity indices, although differences between calculation concepts and sensor-recorded reflectance values limit accuracy.
GEOCARTO INTERNATIONAL
(2022)
Article
Engineering, Aerospace
Elahe Moradi, Alireza Sharifi
Summary: Radiometric calibration is a method of estimating the reflection of a target from measured input radiation. This study focused on radiometrically calibrating three spectral bands of Sentinel-2A using Landsat-8 OLI data for comparison. The study found that corrected data from Landsat-8 OLI had more valid results than data corrected and sharpened with panchromatic data.
AIRCRAFT ENGINEERING AND AEROSPACE TECHNOLOGY
(2021)
Article
Environmental Sciences
Zhe Yang, Cailan Gong, Zhihua Lu, Enuo Wu, Hongyan Huai, Yong Hu, Lan Li, Lei Dong
Summary: Lakes are important in the earth's ecosystems and human activities, and turbidity is a crucial indicator of lake water quality. Existing satellite monitoring methods have limitations in capturing the variability of turbidity in lakes, but the combination of Sentinel-2 and Landsat can provide high spatial and temporal resolution for monitoring lake turbidity.
Article
Engineering, Electrical & Electronic
Wenxia Gan, Hessah Albanwan, Rongjun Qin
Summary: This study introduces a novel radiometric normalization method based on MODIS products, which uses multiple reference images and extends traditional filtering methods to achieve radiometric normalization between different resolutions. Experimental results show significant radiometric consistency in both temporal and spatial dimensions.
IEEE JOURNAL OF SELECTED TOPICS IN APPLIED EARTH OBSERVATIONS AND REMOTE SENSING
(2021)
Article
Environmental Sciences
Federico Santini, Angelo Palombo
Summary: This paper investigates the impact of topographic correction on remote sensing images and highlights the necessity of atmospheric correction in mountainous environments. By using data acquired under different illumination conditions with different sensors and conducting a statistical analysis, the importance of topographic correction is demonstrated.
Article
Environmental Sciences
Nima Pahlevan, Antoine Mangin, Sundarabalan V. Balasubramanian, Brandon Smith, Krista Alikas, Kohei Arai, Claudio Barbosa, Simon Belanger, Caren Binding, Mariano Bresciani, Claudia Giardino, Daniela Gurlin, Yongzhen Fan, Tristan Harmel, Peter Hunter, Joji Ishikaza, Susanne Kratzer, Moritz K. Lehmann, Martin Ligi, Ronghua Ma, Francois-Regis Martin-Lauzer, Leif Olmanson, Natascha Oppelt, Yanqun Pan, Steef Peters, Nathalie Reynaud, Lino A. Sander de Carvalho, Stefan Simis, Evangelos Spyrakos, Francois Steinmetz, Kerstin Stelzer, Sindy Sterckx, Thierry Tormos, Andrew Tyler, Quinten Vanhellemont, Mark Warren
Summary: Atmospheric correction over inland and coastal waters remains a challenge in aquatic remote sensing, and the ACIX-Aqua project evaluated 8 AC processors. Data from the Community Validation Database and AERONET-OC showed differing performance of AC processors in different aquatic environments, highlighting the need for improving atmospheric correction for better quality downstream products in freshwater and coastal ecosystems.
REMOTE SENSING OF ENVIRONMENT
(2021)
Article
Geography, Physical
Yunping Chen, Yue Yang, Lei Hou, Kangzhuo Yang, Jiaxiang Yu, Yuan Sun
Summary: An improved aerosol optical depth (AOD) retrieval algorithm based on Sentinel-2 and AERONET data is proposed in this paper. The surface reflectance for AOD retrieval is estimated from the image with minimal aerosol contamination in a temporal window determined by AERONET data. The validation results show that the Sentinel-2 AOD retrievals are highly consistent with the AERONET AOD measurements, with 85.56% falling within the expected error. The mean absolute error and the root-mean-square error are 0.0688 and 0.0882, respectively. The AOD distribution map obtained by this algorithm also reflects fine-spatial-resolution changes in AOD distribution. These results indicate that the improved high-resolution AOD retrieval algorithm is robust and has the potential advantage of retrieving high-resolution AOD over urban areas.
PHOTOGRAMMETRIC ENGINEERING AND REMOTE SENSING
(2023)
Article
Remote Sensing
Sifeng Zhu, Zhengqiang Li, Xiuqing Hu, Lili Qie, Hua Xu, Rui Qiao, Yuhuan Zhang, Philippe Golry
Summary: This study reassesses the homogeneity of the Dunhuang radiometric calibration site and defines suitable regions for calibration. Based on satellite images, three optimal locations are determined and found to have better homogeneity than the existing sites. These sites can serve as new candidate sites for satellite in-flight radiometric calibration.
INTERNATIONAL JOURNAL OF REMOTE SENSING
(2022)
Article
Environmental Sciences
Georgia Doxani, Eric F. Vermote, Jean-Claude Roger, Sergii Skakun, Ferran Gascon, Alan Collison, Liesbeth De Keukelaere, Camille Desjardins, David Frantz, Olivier Hagolle, Minsu Kim, Jerome Louis, Fabio Pacifici, Bringfried Pflug, Herve Poilve, Didier Ramon, Rudolf Richter, Feng Yin
Summary: The correction of atmospheric effects is crucial for remote sensing applications. A benchmark exercise called ACIX was conducted to assess the performance of different atmospheric correction methods. The results showed that the processors were successful in retrieving aerosol optical depth and water vapor retrievals, but there was still a need for better assessment of uncertainties in surface reflectance retrievals.
REMOTE SENSING OF ENVIRONMENT
(2023)
Article
Environmental Sciences
Hao Lin, Siwei Li, Jia Xing, Jie Yang, Qingxin Wang, Lechao Dong, Xiaoyue Zeng
Summary: Recent studies have shown that combining observations from multiple satellites can improve the temporal-spatial coverage of high-resolution AOD measurements. The developed fusing retrieval algorithm demonstrated high accuracy and spatial continuity in retrieving AOD over urban areas. Moreover, the algorithm significantly enhanced the temporal resolution of high-resolution AOD observations.
Letter
Multidisciplinary Sciences
Roger Lopez-Manas, Joan Pere Pascual-Diaz, Aurora Garcia-Berro, Farid Bahleman, Megan S. Reich, Lisa Pokorny, Clement P. Bataille, Roger Vila, Cristina Domingo-Marimon, Gerard Talavera
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2022)
Article
Forestry
Mario Padial-Iglesias, Miquel Ninyerola, Pere Serra, Oscar Gonzalez-Guerrero, Josep Maria Espelta, Joan Pino, Xavier Pons
Summary: This study analyzes the spatio-temporal dynamics of forest expansion in the Iberian Peninsula, revealing different trajectories and drivers of forest expansion across biogeographical regions. Considering the ecological and social impacts is important for developing reliable policies.
Article
Environmental Sciences
Cristina Domingo-Marimon, Joan Maso, Ester Prat, Alaitz Zabala, Ivette Serral, Meritxell Batalla, Miquel Ninyerola, Jordi Cristobal
Summary: Phenology observations are crucial for understanding the local impacts of climate change. Citizen participation can provide high-quality data at a detailed level. This study proposes an approach to overcome limitations in citizen science, improving guidance and expanding observation sites to monitor climate change. The approach was successfully tested and implemented, identifying thousands of new regions of interest and collecting significant observations.
ENVIRONMENTAL RESEARCH LETTERS
(2022)
Article
Environmental Sciences
Maria Paula Mendes, Victor Rodriguez-Galiano, David Aragones
Summary: This study evaluates the potential of the BFAST method in identifying gradual and abrupt changes in freshwater resources in Mediterranean climate regions. It provides an alternative method for change detection in hydrological data and paves the way for further investigation on climate variability and its impact on water resources. The BFAST method has been successfully applied in assessing past management decisions, monitoring changes in reservoirs and groundwater, and measuring resilience to drought conditions.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Multidisciplinary Sciences
Eduardo Mayoral, Jeremy Duveau, Ana Santos, Antonio Rodriguez Ramirez, Juan A. Morales, Ricardo Diaz-Delgado, Jorge Rivera-Silva, Asier Gomez-Olivencia, Ignacio Diaz-Martinez
Summary: Hominin footprints discovered in Matalascanas, Southern Spain were dated to approximately 295.8 ka, providing important evidence for understanding human occupation in Europe during the Pleistocene.
SCIENTIFIC REPORTS
(2022)
Article
Environmental Sciences
Mojtaba Saboori, Yousef Mousivand, Jordi Cristobal, Reza Shah-Hosseini, Ali Mokhtari
Summary: This study quantified accurate evapotranspiration (ET) time series using SEBAL algorithm and GLDAS meteorological data, and evaluated different endmember selection methods for estimation. Results showed that endmember selection with morphological functions performed better, especially in humid zones. However, the three approaches had similar performance in sub-humid, semi-arid and arid climates.
Article
Zoology
Marina Garrido-Priego, David Aragones, H. Christoph Liedtke, Andrew Whitworth, Ivan Gomez-Mestre
Summary: Habitat encroachment can have devastating effects on biodiversity, particularly for amphibians. Using remote sensing and ecological niche modeling, we identified the abiotic factors associated with the distribution of the endemic frog Phyllobates vittatus in Costa Rica. Our models were informed by field observations, data from other researchers, and citizen science, providing a comprehensive database of P. vittatus occurrences. The results showed that elevation, forest percentage, distance to water bodies, temperature range, and precipitation variables shape the species' ecological niche, which is primarily found in protected areas. The study identified isolated populations, potential reintroduction areas, and suggests adjusting the conservation status of P. vittatus to Endangered. Further surveys and population evaluations are needed to ensure long-term protection of the species.
Article
Chemistry, Analytical
Erick Russell, Joan-Cristian Padro, Pau Montero, Cristina Domingo-Marimon, Vicenc Carabassa
Summary: In the field of mine engineering, volumetric calculations for restoration purposes can be conducted using a cross-section topographic survey. However, advancements in Remote Sensing and GIS technologies now allow for the use of indirect methods, such as photogrammetric flights and UAVs, to obtain quality geospatial information for mapping projects in a short period of time. This study demonstrates the application of these technologies in a gravel extraction area to estimate the filling volume of material required for relief restoration, while also considering factors such as water flow connectivity and potential landscape impacts.
Article
Forestry
Marco Antonio Espinoza-Guzman, David Aragones Borrego, Francisco Javier Sahagun-Sanchez
Summary: Mountain regions are important for ecosystem services, and Cofre de Perote volcano in Mexico provides goods and services to the people in Veracruz. Despite being a protected national park, it has experienced landscape changes in recent years. We used remote sensing data to map land-use and land-cover changes from 2017 to 2021 and found that 21.77% of the area changed, mainly from forests to agriculture. Updating knowledge on LULCC dynamics will support better conservation actions for mountain ecosystems.
TREES FORESTS AND PEOPLE
(2023)
Article
Environmental Sciences
Miguel de Felipe, David Aragones, Carmen Diaz-Paniagua
Summary: Wetland conservation in Donana National Park is at risk due to groundwater abstraction for agriculture and human supply. Analyzing 442 satellite images, it was found that 59% of the studied ponds have dried up. The main factors influencing pond flooding were rainfall, temperature, intensive agriculture, and nearby tourist activities.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Microbiology
Irene Saavedra, Julio Rabadan-Gonzalez, David Aragones, Jordi Figuerola
Summary: Global change is driving the increase in emerging infectious diseases. The interest in nature has led to the development of citizen science platforms for recording wildlife observations. This study examined the utility of bird observations on the platform Observation.org for early detection of highly pathogenic avian influenza virus (HPAIV) outbreaks. The results suggest that the increase in sick and dead bird records on the platform coincides with officially reported HPAIV outbreaks.
Editorial Material
Geosciences, Multidisciplinary
Joan Maso, Xavier Pons
GEOFOCUS-REVISTA INTERNACIONAL DE CIENCIA Y TECNOLOGIA DE LA INFORMACION GEOGRAFICA
(2023)
Article
Ecology
Jesus Julio Camarero, Ricardo Diaz-Delgado, Michele Colangelo, Cristina Valeriano, Raul Sanchez-Salguero, Javier Madrigal
Summary: Assessing post-fire recovery is crucial for predicting the response of ecosystems to future warmer conditions and higher fire severity. This study used tree-ring data and intrinsic water-use efficiency (WUEi) to examine the post-fire responses of Pinus pinea and Juniperus phoenicea in Mediterranean coastal dunes. The results showed that pines with lower crown damage had higher growth rates one year after the fire, while fast-growing pines from the slack site experienced decreased growth rates. Slow-growing dune pines, on the other hand, exhibited increasing growth rates one to three years after the fire. The fire did not affect the pines' WUEi values, but the junipers in the dunes had the highest WUEi values. Severe crown damage impaired the long-term growth recovery of P. pinea. The findings suggest that open and heterogeneous landscapes can reduce the wildfire risk in Mediterranean areas, and post-fire management plans should consider differences between slack and dune areas as well as between trees and shrubs.
Article
Environmental Studies
Joan-Cristian Padro, Johnsson Cardozo, Pau Montero, Roger Ruiz-Carulla, Josep Maria Alcaniz, Delia Serra, Vicenc Carabassa
Summary: This article presents a method for identifying water erosion processes in active quarries using drone imagery remote sensing. The method allows for quick and accurate identification of erosion factors in mining operations. With affordable and non-invasive materials, this method can create digital grid maps ready for 3D metrics, making it a practical tool for characterizing the restoration evolution of open-pit mining spaces.
