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This eBook is a collection of articles from a Frontiers Research Topic. Frontiers Research Topics are very popular trademarks of the Frontiers Journals Series: they are collections of at least ten articles, all centered on a particular subject. With their unique mix of varied contributions from Original Research to Review Articles, Frontiers Research Topics unify the most influential researchers, the latest key findings and historical advances in a hot research area! Find out more on how to host your own Frontiers Research Topic or contribute to one as an author by contacting the Frontiers Editorial Office: frontiersin.org/about/contact

Science: general issues --- Physical geography & topography --- Paroxysmal explosive activity --- Eruption dynamics and parameters --- Volcano deformation and strain --- Volcano degassing --- thermal remote sensing --- doppler radar --- Lava fountains --- Volcanic aerosol --- satellite remote sensing --- HAZARD ASSESSMENT

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Remotely sensed data from either air- or spaceborne platforms are often leveraged for archaeological or more general cultural heritage goals. However, despite the steady developments in remote sensing technology over the past three decades, the thoughtful integration of data sources and methods into theoretically aware archaeological practice remains relatively underdeveloped. This volume contains nine contributions which, each in their way, address different theoretical dislocations and practical shortcomings in the use of remote sensing products within archaeological practice. These contributions provide the reader with food for thought on these challenges, and so contribute to archaeological remote sensing as a more mature interdisciplinary field characterised by explicit, thoughtful, and theoretically engaged approaches to understanding the past.

Biography & True Stories --- Archaeology --- relief mapping --- visualization --- blend modes --- digital elevation model --- airborne laser scanning --- lidar --- archaeological prospection --- deep learning --- citizen science --- The Netherlands --- archaeology --- arid environments --- satellite remote sensing --- lithological mapping --- lithic procurement --- chert sourcing --- Landsat 8 --- GIS --- ALS --- amplitude --- radiometric calibration --- reflectance --- Sicily --- transfer learning --- historic mining --- heritage management --- LiDAR --- hyperspectral data --- submerged areas --- cultural heritage monitoring --- anomaly detection --- MNF --- radiative transfer model --- Martin Heidegger --- technology --- mimesis --- remote sensing archaeology --- cultural context --- archaeological remote sensing --- satellite mission design --- satellite archaeology --- archaeological survey --- cropmarks --- empirical knowledge --- alluvial sediments --- geomorphological/pedological background --- soil spatial infrastructure --- statistical methods

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This book provides a practical introduction to remote sensing applications for detecting changes in the terrestrial water cycle and understanding the causes and consequences of these changes. Covering a wide range of innovative remote sensing approaches for hydrological study, this book contributes significantly to the knowledge base of hydrology in the Anthropocene, i.e., global change hydrology. It is an excellent reference for students and professionals in the fields of hydrology, climate change, and geography.

Research & information: general --- Geography --- hydrological cycle --- Three-North region --- climate change --- land cover change --- Variable Infiltration Capacity (VIC) model --- evapotranspiration --- runoff --- soil moisture --- three-temperature model --- infrared remote sensing --- urban hedges --- cooling effects --- irrigation mapping --- remote sensing --- random forest --- subhumid region --- dry-wet regime --- vegetation dynamics --- GLDAS --- GIMMS --- Yarlung Zangbo River --- Microwave emissivity difference vegetation index (EDVI) --- evapotranspiration (ET) --- satellite remote sensing --- cloudy sky --- clouds and earth's radiation energy system (CERES) --- ChinaFLUX --- precipitation classification --- K-nearest neighbor --- Doppler radar --- Tropical Precipitation Measurement Mission (TRMM) --- irrigation signal --- SMAP --- irrigation intensity --- winter wheat --- precipitation --- evaluation --- error analysis --- Fengyun --- quantitative precipitation estimates --- GPM --- IMERG --- deep learning --- Daihai Lake --- Huangqihai Lake --- lake degradation --- weather radar quantitative precipitation estimation --- rain gauge --- radar-rain gauge merging --- leave-one-out cross validation --- verification --- China --- exorheic catchments --- water balance --- GRACE --- terrestrial water storage changes --- reservoir storage --- MODIS --- SRTM

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The concept of nitrogen gap (NG), i.e., its recognition and amelioration, forms the core of this book entitled Site-Specific Nutrient Management (SSNM). Determination of the presence of an NG between fields on a farm and/or within a particular field, together with its size, requires a set of highly reliable diagnostic tools. The necessary set of diagnostic tools, based classically on pedological and agrochemical methods, should be currently supported by remote-sensing methods. A combination of these two groups of methods is the only way to recognize the factors responsible for yield gap (YG) appearance and to offer a choice of measures for its effective amelioration. The NG concept is discussed in the two first papers (Grzebisz and Łukowiak, Agronomy 2021, 11, 419; Łukowiak et al., Agronomy 2020, 10, 1959). Crop productivity depends on a synchronization of plant demand for nitrogen and its supply from soil resources during the growing season. The action of nitrate nitrogen (N–NO3), resulting in direct plant crop response, can be treated by farmers as a crucial growth factor. The expected outcome also depends on the status of soil fertility factors, including pools of available nutrients and the activity of microorganisms. Three papers are devoted to these basic aspects of soil fertility management (Sulewska et al., Agronomy 2020, 10, 1958; Grzebisz et al., Agronomy 2020, 10, 1701; Hlisnikovsky et al., Agronomy 2021, 11, 1333). The resistance of a currently cultivated crop to seasonal weather variability depends to a great extent on the soil fertility level. This aspect is thoroughly discussed for three distinct soil types and climates with respect to their impact on yield (Hlisnikovsky et al., Agronomy 2020, 10, 1160—Czech Republic; Wang et al., Agronomy 2020, 10, 1237—China; Łukowiak and Grzebisz et al., Agronomy 2020, 10, 1364—Poland). In the fourth section of this book, the division a particular field into homogenous production zones is discussed as a basis for effective nitrogen management within the field. This topic is presented for different regions and crops (China, Poland, and the USA) (Cammarano et al., Agronomy 2020, 10, 1767; Panek et al., Agronomy 2020, 10, 1842; Larson et al., Agronomy 2020, 10, 1858).

Research & information: general --- Biology, life sciences --- Technology, engineering, agriculture --- Triticum aestivum L. --- farmyard manure --- mineral fertilizers --- crude protein content --- soil properties, site-specific requirements --- yield --- site-specific nitrogen management --- regional optimal nitrogen management --- net return --- nitrogen use efficiency --- spatial variability --- temporal variability --- seed density --- N uptake --- indices of N productivity --- mineral N --- indigenous Nmin at spring --- post-harvest Nmin --- N balance --- N efficiency --- maximum photochemical efficiency of photosystem II --- chlorophyll content index --- soil enzymatic activity --- biological index fertility --- nitrogenase activity --- microelements fertilization (Ti --- Si --- B --- Mo --- Zn) --- soil --- nitrate nitrogen content --- contents of available phosphorus --- potassium --- magnesium --- calcium --- cardinal stages of WOSR growth --- PCA --- site-specific nutrient management --- soil brightness --- satellite remote sensing --- crop yield --- soil fertility --- winter wheat --- winter triticale --- vegetation indices --- NDVI --- grain yield --- number of spikes --- economics --- normalized difference vegetation index (NDVI) --- on-the-go sensors --- winter oilseed rape → winter triticale cropping sequence --- N input --- N total uptake --- N gap --- Beta vulgaris L. --- organic manure --- weather conditions --- soil chemistry --- sugar concentration --- climatic potential yield --- yield gap --- soil constraints --- subsoil --- remote sensing-techniques --- field --- a field --- crop production --- sustainability --- homogenous productivity units --- nitrogen indicators: in-season --- spatial --- vertical variability of N demand and supply --- spectral imagery

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Remote sensing data and methods are increasingly being implemented in assessments of volcanic processes and risk. This happens thanks to their capability to provide a spectrum of observation and measurement opportunities to accurately sense the dynamics, magnitude, frequency, and impacts of volcanic activity. This book includes research papers on the use of satellite, aerial, and ground-based remote sensing to detect thermal features and anomalies, investigate lava and pyroclastic flows, predict the flow path of lahars, measure gas emissions and plumes, and estimate ground deformation. The multi-disciplinary character of the approaches employed for volcano monitoring and the combination of a variety of sensor types, platforms, and methods that come out from the papers testify to the current scientific and technology trends toward multi-data and multi-sensor monitoring solutions. The added value of the papers lies in the demonstration of how remote sensing can improve our knowledge of volcanoes that pose a threat to local communities; back-analysis and critical revision of recent volcanic eruptions and unrest periods; and improvement of modeling and prediction methods. Therefore, the selected case studies also demonstrate the societal impact that this scientific discipline can potentially have on volcanic hazard and risk management.

Research & information: general --- volcanic thermal anomalies --- change detection --- Villarrica Volcano --- small satellites --- FireBIRD --- TET-1 --- gas emission monitoring --- X-band InSAR --- scanning Mini-DOAS --- Multi-GAS --- volcanic gases --- precipitable water vapor --- radar path delay --- Láscar volcano --- Mt. Etna --- multi-platform satellite observations --- RSTVOLC --- Stromboli volcano --- landslides --- effusive activity --- Ground-Based InSAR --- infrared live cam --- seismic monitoring --- PLEIADES --- Digital Elevation Models --- optical sensors --- volcano remote sensing --- volcano deformation --- SAR interferometry --- post-unrest deflation --- inversion modelling --- Santorini --- hyperspectral --- FENIX --- lava field --- SMACC --- LSMA --- volcano monitoring --- thermal imaging --- time series --- Seasonal-Trend Decomposition --- heat flux --- emissivity --- lava flow modeling --- remote sensing --- volcanic eruption interpretation --- eruption forecasting --- MSG SEVIRI --- wavelet --- thermal measurements --- lava fountain --- lava flow --- Mt.Etna --- eruptive style --- Timanfaya volcanic area --- HDR geothermal systems --- GPR --- EMI --- magnetic anomalies --- seasonality --- lahars hazard --- magma accumulation --- pyroclastic flows --- ash plumes --- volcanic cloud --- Landsat 8 --- elevation model --- Volcán de Colima --- lava flow volume estimation --- SPOT --- EO-1 ALI --- MODIS data --- SENTINEL-2 images --- infrasonic activity --- open-vent activity --- fissural eruption --- long- and short-term precursors --- SO2 fluxes --- UV Camera --- Etna Volcano --- explosive basaltic volcanism --- Bezymianny --- monitoring --- lava dome --- inflation --- SAR imaging --- radar pixel offsets --- acoustic infrasound --- volcanic emissions --- ground-based remote sensing --- Sentinel missions --- Convolutional Neural Network (CNN) --- Synthetic Aperture Radar (SAR) imaging --- InSAR processing --- infrared remote sensing --- SO2 gas emission --- satellite remote sensing --- ash fall --- lava flows --- pyroclastic density currents --- mapping --- volcanic hazard --- gas emissions --- edifice growth and collapse --- volcanic unrest --- thermal anomalies