Results 121 to 130 of about 72,896,276 (244)

Rethinking microtidal systems: Tidal signatures in the fluvial deposits of the Po River, Italy

Sedimentology, EarlyView.
ABSTRACT In microtidally influenced rivers, tides are generally assumed to leave virtually no signatures in the sedimentary record. However, this hypothesis has been surprisingly poorly tested using modern river analogues, which provide an opportunity to assess whether sedimentary signatures of microtidal regimes can develop in rivers that lack ...
Anna E. van Yperen, Alvise Finotello, Riccardo Maitan, Ivar Midtkandal, Fabrizio Nestola, Davide Tognin, Massimiliano Ghinassi   +6 more
wiley   +1 more source

Remote sensing and integration of machine learning algorithms for above-ground biomass estimation in Larix principis-rupprechtii Mayr plantations: a case study using Sentinel-2 and Landsat-9 data in northern China

Frontiers in Environmental Science
Estimating above-ground biomass (AGB) is important for ecological assessment, carbon stock evaluation, and forest management. This research assesses the performance of the machine learning algorithms XGBoost, SVM, and RF using data from the Sentinel-2 ...
Jamshid Ali, Wang Haoran, Kaleem Mehmood, Wakeel Hussain, Farhan Iftikhar, Fahad Shahzad, Khadim Hussain, Yin Qun, Jia Zhongkui   +8 more
doaj   +1 more source

Assessing Investment in Future Landsat Instruments: The Example of Forest Carbon Offsets [PDF]

We extend the theory of quality-adjusted expenditure indices to estimate benefits from public investment. In particular, we model the selection of new instruments (in the form of remote-sensing devices) to enhance the longest-operating U.S.
Macauley, Molly K., Shih, Jhih-Shyang
core  

Perennially ice‐covered lake facies as proxies for ice cover properties and climate: Insights from Lake Joyce, Antarctica

Sedimentology, EarlyView.
ABSTRACT Process‐based depositional models for perennially ice‐covered lakes (PICLs) are important for interpreting palaeolake deposits and their connection to past climate. PICLs are only stable under specific climate states, and unlike other ice‐free or seasonally ice‐covered lakes, PICL deposits generally have bimodal grain sizes: mud introduced by ...
Frances Rivera‐Hernández, Dawn Y. Sumner, Tyler J. Mackey   +2 more
wiley   +1 more source

Landsat 9 [PDF]

Fact Sheet, 2019
openaire   +1 more source

Spatiotemporal mapping of agricultural drought using geospatial approach in the East Bale Zone, Ethiopia

Agrosystems, Geosciences &Environment, Volume 9, Issue 4, December 2026.
Abstract Agricultural drought significantly threatens food security, livelihoods, and ecosystem stability, especially in regions prone to drought, such as the East Bale zone. This study investigates the spatial and temporal patterns of agricultural drought over 30 years (1993–2024) by combining meteorological station data with satellite‐derived ...
Murad Hedo Haji, Karuturi Venkata Suryabhagavan   +1 more
wiley   +1 more source

The Impact of Land Use and Land Cover Changes on Runoff Volume for Hydropower

Applied Research, Volume 5, Issue 6, December 2026.
This study investigates the relationship between land use and land cover (LULC) changes, runoff, and hydropower generation. Remote sensing and Geographic Information System (GIS) techniques were used to analyse LULC changes over a 21‐year period. The SCS‐CN hydrological model was applied to estimate runoff, while Flow Duration Curves (FDCs) were ...
Siti Khadijah Taherah Binti Khairul Idzham, Azlinda Ramli, Ahmad Shakir Mohd Saudi   +2 more
wiley   +1 more source

The Ground-Based Absolute Radiometric Calibration of the Landsat 9 Operational Land Imager

Remote Sensing
This paper presents the initial vicarious radiometric calibration results for Landsat 9 OLI using a combination of ground-based techniques and test sites located in Nevada, California, and South Dakota, USA. The field data collection methods include the traditional reflectance-based approach and the automated Radiometric Calibration Test Site (RadCaTS).
Jeffrey S. Czapla-Myers, Kurtis J. Thome, Nikolaus J. Anderson, Larry Leigh, Cibele Teixeira Pinto, Brian N. Wenny   +5 more
openaire   +3 more sources

‘Location Matters’: Incorporating Spatial Autocorrelation Into Modelling the Drivers of Cyanobacterial Biomass in Reservoirs of Northeastern Brazil

Ecohydrology, Volume 19, Issue 7, November/December 2026.
ABSTRACT Spatial autocorrelation (SAC) is a critical yet often overlooked component of ecological analyses, which can significantly influence the accuracy and interpretation of statistical models. Therefore, this study aimed to evaluate the spatial distribution of cyanobacteria biomass among tropical reservoirs at the watershed scale and to identify ...
Tatiane Medeiros Queiroz, Juliana dos Santos Severiano, Patrícia Silva Cruz, Maria Eduarda Dantas César, Laissa Lima do Nascimento, José Etham de Lucena Barbosa   +5 more
wiley   +1 more source

Estimating Sub‐Pixel Temperatures During Volcanic Eruptions Using Dual‐Band Thermal Imaging Technique: Case Studies From Whakaari/White Island (New Zealand) and Tofua (Tonga)

New Zealand Journal of Geology and Geophysics, Volume 69, Issue 4, December 2026.
This study presents the first application of a dual‐band satellite thermal monitoring technique in New Zealand and Tonga, using the 2019 eruption of Whakaari/White Island and the persistently active Lofia crater on Tofua volcano as case studies. At Whakaari/White Island, near‐synchronous Landsat‐8 and Sentinel‐2A data (16 min interval) were analysed ...
Salman Ashraf, Geoff Kilgour, Jenny Black, Muhammad Aufaristama   +3 more
wiley   +1 more source