Article
Geochemistry & Geophysics
Gerardo Di Martino, Alessio Di Simone, Antonio Iodice, Daniele Riccio
Summary: This article proposes a novel benchmarking framework for quantitative assessment of multitemporal SAR imagery despeckling algorithms, utilizing both canonical scenes and data sets for analysis. The benchmarking tool relies on an accurate SAR simulator to generate realistic SAR images and evaluates performance with quality measures based on the scene. The framework is applied to state-of-the-art multitemporal filters, showing good agreement with visual inspections by SAR specialists.
IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING
(2022)
Article
Geochemistry & Geophysics
T. Manninen, E. Jaaskelainen
Summary: This study introduces a new method called PIMSAR for despeckling synthetic aperture radar (SAR) data, which successfully maintains high resolution while preserving the smallest details. The approach utilizes the temporal evolution of nature to establish the similarity of SAR pixels, achieving a relative accuracy better than 0.02% with rapid processing speed.
IEEE GEOSCIENCE AND REMOTE SENSING LETTERS
(2022)
Article
Environmental Sciences
Shaojia Ge, Erkki Tomppo, Yrjo Rauste, Ronald E. Mcroberts, Jaan Praks, Hong Gu, Weimin Su, Oleg Antropov
Summary: In this study, the potential of long time series of Sentinel-1 SAR data to predict forest growing stock volume (GSV) was explored, and the temporal dynamics of the predictions were evaluated using extensive reference data. Increasing the number of images was found to significantly improve prediction accuracy, and feature extraction techniques were used to optimize the prediction models. Lasso method achieved the most optimal prediction accuracy, with a root mean squared error (RMSE) of 77.1 m3/ha.
Article
Geochemistry & Geophysics
Lei Zhang, Jun Hu, Xiaoli Ding, Yangmao Wen, Hongyu Liang
Summary: Differential interferometric synthetic aperture radar (DInSAR) is an important technology for determining coseismic deformation, but its processing is often affected by various errors. In this letter, a multitemporal InSAR (MTInSAR) method is proposed to accurately determine coseismic deformation by effectively separating it from other error deformation based on the analysis of preseismic and postseismic SAR images.
IEEE GEOSCIENCE AND REMOTE SENSING LETTERS
(2022)
Article
Geochemistry & Geophysics
Jun Ni, Carlos Lopez-Martinez, Zhongbo Hu, Fan Zhang
Summary: This article proposes a new interpretation of coherence to analyze low-coherence scenarios and introduces an alternative method for information retrieval in low-coherence situations, utilizing polarimetry to optimize values.
IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING
(2022)
Article
Engineering, Civil
Mengqi Zhao, Jan Boll, Erin S. Brooks
Summary: This study evaluates the long-term effects of land cover change on hydrological processes in the Mica Creek Experimental Watershed. Findings suggest that timber harvest significantly impacts streamflow and peak flow, especially in high P(A(i) = HS) areas. Forest management decisions should favor partial cutting over clearcutting, and adjustments in spatial distribution and timing of harvesting to minimize negative impacts on the water cycle are recommended.
JOURNAL OF HYDROLOGY
(2021)
Article
Engineering, Electrical & Electronic
Jason M. Merlo, Jeffrey A. Nanzer
Summary: This article presents a low-frequency SAR radar for automotive use and showcases the opportunity to infer landmarks through measurements of co-polarized and cross-polarized scattering.
IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY
(2022)
Article
Geochemistry & Geophysics
Donato Amitrano, Raffaella Guida, Pasquale Iervolino
Summary: The proposed methodology introduces a new approach for unsupervised change detection in vegetation canopy, achieving superior results compared to literature methods in agriculture experiments. While maintaining comparable detection accuracy in cases of deforestation, it significantly reduces the number of false deforestation patterns. The architecture's main characteristics are robustness and lack of supervision, making it well-suited for operational scenarios.
IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING
(2021)
Article
Engineering, Electrical & Electronic
Yuri Alvarez Lopez, Jaime Laviada, Ana Arboleya, Fernando Las-Heras
Summary: Synthetic aperture radar (SAR)-based microwave imaging systems are widely used in various applications. The scanning speed is a crucial factor in SAR imaging systems, and widening the distance between measurements can increase it. However, this causes the presence of grating lobes that degrade the quality of microwave SAR images. To address this issue, a novel methodology is proposed in this study, which incorporates the amplitude and phase of the field radiated by the transmitting and receiving antennas in the backpropagation imaging algorithm. This method exploits the directive pattern of the antennas to reduce the level of grating lobes in SAR images.
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
(2023)
Article
Engineering, Electrical & Electronic
Hao Feng, Lu Zhang, Jie Dong, Sihui Li, Qixuan Zhao, Jiayin Luo, Mingsheng Liao
Summary: This study maps and analyzes a flood event in the Taiyuan basin in north China in early October 2021 using multitemporal synthetic aperture radar (SAR) images. The flood event process is characterized using a spatiotemporal filter for despeckling the SAR images and classic change indicators. The joint analysis of SAR change detection results and interferometric SAR measurements suggests that land subsidence may contribute to the flood event.
IEEE JOURNAL OF SELECTED TOPICS IN APPLIED EARTH OBSERVATIONS AND REMOTE SENSING
(2022)
Article
Geochemistry & Geophysics
Juha Lemmetyinen, Jorge Jorge Ruiz, Juval Cohen, Jouko Haapamaa, Anna Kontu, Jouni Pulliainen, J. Praks
Summary: This study investigated the attenuation of radar signals in boreal forests during winter using a multifrequency ground-based synthetic aperture radar (GB-SAR). The results showed that the ambient temperature had a significant impact on the attenuation, with the maximum attenuation observed at temperatures below 0 degrees Celsius. The presence of snow on the canopy also increased the attenuation, but had negligible effects on vegetation backscatter.
IEEE GEOSCIENCE AND REMOTE SENSING LETTERS
(2022)
Article
Engineering, Electrical & Electronic
Arnold D. Kim, Chrysoula Tsogka
Summary: In this study, we propose a dispersive point target model based on scattering and develop a synthetic aperture imaging method to identify and recover the positions and frequency dependent reflectivities of these targets. Results show that we can detect, recover the approximate locations, and acquire the radar cross-section of dispersive point targets, providing opportunities to classify important differences between multiple targets.
IEEE TRANSACTIONS ON COMPUTATIONAL IMAGING
(2023)
Article
Geochemistry & Geophysics
Lapo Miccinesi, Alberto Michelini, Massimiliano Pieraccini
Summary: This article proposes an acquisition modality and image processing technique to mitigate blurring in GBSAR images caused by moving clutter. By filtering out high-frequency clutter and using high-frequency sampling, the authors have demonstrated the effectiveness of these methods in a realistic quarry scenario.
IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING
(2021)
Article
Engineering, Electrical & Electronic
Laura Parra Garcia, Luca Pallotta, Carmine Clemente, Gaetano Giunta, John J. Soraghan
Summary: Coregistration is a challenging task in dealing with multiple synthetic aperture radar (SAR) images, especially when they are acquired at different time instants and have low signal to noise power ratio (SNR). A new strategy is developed to jointly coregister a stack of multitemporal SAR images, utilizing cross-correlations and misregistration information between the images. The proposed algorithm shows effectiveness in terms of achieved root mean square error for images affected by rotations compared to the constrained Least Squares (CLS) counterpart.
IET RADAR SONAR AND NAVIGATION
(2023)
Article
Engineering, Electrical & Electronic
Yifei Han, Jinliang Huang, Feng Ling, Juan Qiu, Zhixuan Liu, Xiaodong Li, Cun Chang, Hong Chi
Summary: Freshwater aquaculture in Jianghan Plain plays a key role in China's aquaculture industry. The spatial distribution change of aquaculture in Jianghan Plain has attracted attention, but inland aquaculture classification and mapping still have room for improvement. This study used Sentinel-1 and Sentinel-2 data to classify aquaculture areas, nonaquaculture water, and nonwater areas, and achieved a high overall classification accuracy of 96.83%. The combination of object-based and pixel-based image analysis showed advantages in inland aquaculture classification, and integrated rice-crawfish farming was found to be a key factor driving the rapid development of aquaculture. Policies regarding fishing bans and ecosystem restoration also deeply affected the spatial change of aquaculture in Jianghan Plain.
IEEE JOURNAL OF SELECTED TOPICS IN APPLIED EARTH OBSERVATIONS AND REMOTE SENSING
(2023)
Article
Fisheries
Kevin Erratt, Irena F. Creed, Elizabeth J. Favot, Irina Todoran, Vera Tai, John P. Smol, Charles G. Trick
Summary: This study used novel spectral and molecular assessment tools to investigate long-term trends of cyanobacteria in Sunfish Lake. The results indicate that climate change has caused significant changes in the lake environment, leading to a substantial increase in cyanobacteria abundance.
CANADIAN JOURNAL OF FISHERIES AND AQUATIC SCIENCES
(2022)
Article
Fisheries
Jessica E. Desforges, Julia Clarke, Evaline J. Harmsen, Alex M. Jardine, Jessica A. Robichaud, Serina Serre, Prosanta Chakrabarty, Joseph R. Bennett, Dalal E. L. Hanna, John P. Smol, Trina Rytwinski, Jessica J. Taylor, Andre L. Martel, Amanda K. Winegardner, Jerome Marty, Mark K. Taylor, Constance M. O'Connor, Stacey A. Robinson, Andrea J. Reid, Irena F. Creed, Irene Gregory-Eaves, Nicolas W. R. Lapointe, Steven J. Cooke
Summary: Little is known about the current state of freshwater biodiversity in Canada, but based on available data, 11.7% of freshwater plant and animal species are at risk, and 17.9% are identified as being of special concern. There is a lack of sufficient data to assess the status of 37.9% of species, with the most significant data gaps observed in invertebrates (excluding freshwater mussels). Given the alarming state of freshwater biodiversity, it is recommended to evaluate temporal trends and take conservation actions.
CANADIAN JOURNAL OF FISHERIES AND AQUATIC SCIENCES
(2022)
Article
Ecology
Aleksey Paltsev, Irena F. Creed
Summary: Increased reports of phytoplankton blooms in remote pristine lakes suggest potential climate-driven changes in lake ecosystems. Detailed surveys of lakes in northern forested landscapes are crucial to determine if phytoplankton biomass is increasing. The spatial and temporal patterns of chlorophyll-a variation in lakes within the northern temperate forest highlight the complex interactions of local and regional characteristics that influence lake responses to climate change.
Article
Ecology
Charles R. Lane, Irena F. Creed, Heather E. Golden, Scott G. Leibowitz, David M. Mushet, Mark C. Rains, Qiusheng Wu, Ellen D'Amico, Laurie C. Alexander, Genevieve A. Ali, Nandita B. Basu, Micah G. Bennett, Jay R. Christensen, Matthew J. Cohen, Tim P. Covino, Ben DeVries, Ryan A. Hill, Kelsey Jencso, Megan W. Lang, Daniel L. McLaughlin, Donald O. Rosenberry, Jennifer Rover, Melanie K. Vanderhoof
Summary: Vulnerable waters play a crucial role in maintaining watershed resilience by storing, processing, and releasing water and materials. Modifying these waters can decrease resilience and trigger transitions to alternative watershed states. Spatial heterogeneity and temporal variability in hydrological and biogeochemical interactions are essential for resilient watersheds.
Article
Biodiversity Conservation
Aleksey Paltsev, Irena F. Creed
Summary: This study used satellite data and models to analyze the relationship between phytoplankton biomass in northern temperate lakes and climate factors as well as landscape characteristics. The study found that different lakes have different response patterns, which can help predict the susceptibility of lakes to eutrophication caused by climate change.
GLOBAL CHANGE BIOLOGY
(2022)
Review
Biodiversity Conservation
Jessica L. Reid, Jordanna N. Bergman, Andrew N. Kadykalo, Jessica J. Taylor, William M. Twardek, Trina Rytwinski, Auston D. Chhor, Acacia Frempong-Manso, Andre L. Martel, Nicolas W. R. Lapointe, Joseph R. Bennett, Vivian M. Nguyen, Andrea J. Reid, Jerome Marty, Stacey A. Robinson, D. Andrew R. Drake, Amanda K. Winegardner, Irene Gregory-Eaves, Mark K. Taylor, John P. Smol, Irena F. Creed, Constance M. O'Connor, Steven J. Cooke
Summary: This study presents a toolbox for decision-makers and practitioners to address threats to freshwater biodiversity, using Canada as an example. The toolbox includes scoring tools and 259 evidence syntheses, which found reliable evidence for habitat creation, invasive species removal, and revegetation. However, there are other actions for which the evidence is unreliable.
BIOLOGICAL CONSERVATION
(2022)
Article
Forestry
Yiping Hou, Xiaohua Wei, Mingfang Zhang, Irena F. Creed, Steven G. McNulty, Silvio F. B. Ferraz
Summary: This synthesis estimated and compared the hydrological sensitivities (HSf) of annual streamflow to deforestation and forestation based on quantitative analyses of 311 watersheds worldwide. The study found that the hydrological sensitivities to forestation are significantly larger than those to deforestation, with an average change in annual streamflow of 1.24% following 1% forestation and 0.91% following 1% deforestation. Climate and watershed properties were identified as important factors influencing hydrological sensitivities.
FOREST ECOLOGY AND MANAGEMENT
(2023)
Article
Ecology
Ursula Strandberg, Minna Hiltunen, Irena F. Creed, Michael T. Arts, Paula Kankaala
Summary: The effects of lake browning on trophic functioning of planktonic food webs are not fully understood. Browning increased phytoplankton biomass and concentrations of EPA and DHA in lakes, while the seston n-3/n-6 ratio was lower in temperate lakes due to differences in phytoplankton community composition. Lake browning resulted in increased reliance of zooplankton on heterotrophic microbial pathways, but the responses were highly specific to taxa and regions.
Review
Forestry
Zhiqiang Zhang, Lu Zhang, Hang Xu, Irena F. Creed, Juan A. Blanco, Xiaohua Wei, Ge Sun, Heidi Asbjornsen, Kevin Bishop
Summary: This paper reviews the literature on the impact of biophysical variables and management practices on forest water-use efficiency. It was found that water-use efficiency varies greatly with forest type, species, age, environmental conditions, and forest management practices. Climatic stresses often have negative effects on forest instantaneous water-use efficiency, and forest thinning can effectively improve water-use efficiency. These findings have important implications for managing the tradeoffs between carbon sequestration and water yield of forests.
FOREST ECOLOGY AND MANAGEMENT
(2023)
Letter
Limnology
Peter D. F. Isles, Irena F. Creed, Dag O. Hessen, Pirkko Kortelainen, Michael Paterson, Francesco Pomati, James A. Rusak, Jussi Vuorenmaa, Ann-Kristin Bergstrom
Summary: In recent years, unexplained declines in lake TP concentrations have been observed in northern latitudes (> 42 degrees N latitude). Data from 389 lakes in Fennoscandia and eastern North America were analyzed to investigate the effects of climate on lake TP concentrations. Synchrony in year-to-year variability was found within and among different geographic regions, indicating climatic influences. Winter temperature was identified as the most important factor controlling annual TP, followed by summer precipitation.
LIMNOLOGY AND OCEANOGRAPHY LETTERS
(2023)
Article
Soil Science
Ehsan Zarrinabadi, David A. Lobb, Eric Enanga, Pascal Badiou, Irena F. Creed
Summary: Wetlandscapes in the Canadian Prairies are vulnerable to sediment infilling due to land conversion and upland agricultural activities. This study examines the effects of agricultural activities on soil loss and sedimentation rates within agricultural landscapes. Findings reveal that erosion occurs near the top of the catchment toposequences, while deposition occurs within the wetland ecosystem. These transfers from cultivated fields into wetlands highlight the need for soil erosion control practices in order to achieve sustainable management of agricultural landscapes.
Article
Biodiversity Conservation
Kevin J. Erratt, Irena F. Creed, David A. Lobb, John P. Smol, Charles G. Trick
Summary: Cyanobacterial blooms pose a significant threat to water security, with anthropogenic forcing being implicated as a key driver behind the recent upsurge and global expansion of cyanobacteria in modern times. The potential effects of land-use alterations and climate change can lead to complicated, less-predictable scenarios in cyanobacterial management, especially when forecasting cyanobacterial toxin risks.
GLOBAL CHANGE BIOLOGY
(2023)
Article
Environmental Sciences
Kevin J. Erratt, Irena F. Creed, Elizabeth J. Favot, John P. Smol, Rolf D. Vinebrooke, David A. Lobb, Charles G. Trick
Summary: The global rise of cyanobacterial blooms necessitates the development of tools for managing cyanobacteria-prone water bodies. This study compares spectral inferences using VNIRS with molecular quantification using qPCR to reconstruct cyanobacterial abundance in sediments. The findings suggest that VNIRS is suitable for reconstructing recent cyanobacterial prevalence, but further refinement is needed in some cases.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
Article
Ecology
Irena F. . Creed, Christopher M. Hewitt, Nora J. Casson, Alexandra R. Contosta, John L. Campbell, David Lutz, Anita T. Morzillo
Summary: In October 2011, the Halloween Nor'easter caused extensive damage in the northeastern United States due to early and heavy snowfall during the autumn season. This study emphasizes the importance of considering multiple drivers and hazards when predicting the impacts of extreme weather events. By integrating meteorological, natural, and human system drivers, we found that such an approach improves the accuracy of storm impact predictions.
ECOLOGY AND SOCIETY
(2023)
Article
Ecology
Tracy S. Lee, Lea A. Randall, Nicole L. Kahal, Holly L. Kinas, Vanessa A. Carney, Heather Rudd, Tyne M. Baker, Ken Sanderson, Irena F. Creed, Axel Moehrenschlager, Danah Duke
Summary: Cities worldwide are facing challenges in conserving amphibian populations due to habitat loss, fragmentation, and degradation caused by urban expansion. We have developed an eight-step conservation framework that includes monitoring, analysis, and community engagement to protect amphibians in urban areas.
ECOLOGICAL SOLUTIONS AND EVIDENCE
(2022)
