Results 101 to 110 of about 6,260,921 (223)

Remote sensing of land surface phenology [PDF]

Fact Sheet, 2014
G.A. Meier, Jesslyn F. Brown
openaire   +1 more source

Time‐series digital camera photos combined with machine learning algorithms can realize accurate observation of flowering phenology

Remote Sensing in Ecology and Conservation, EarlyView.
Intelligent approaches are required to extract valuable phenological information from time‐series digital camera photos. In this research, we employed YOLO‐based object detection and semantic segmentation models to identify flowers and flower pixels, acquire flower count and flower cover data, and extract phenophases such as first, peak, and end ...
Chuangye Song, Yuan Jia, Lin Zhang, Dongxiu Wu   +3 more
wiley   +1 more source

Tree species diversity drives the land surface phenology of seasonally dry tropical woodlands [PDF]

Seasonal foliage display (leaf phenology) is a key determinant of ecosystem function. Variation in land surface phenology, observed via space-borne remote sensing, can be explained at broad spatial scales by climate, but we lack understanding of how ...
Siampale, A., Ryan, Casey, Dexter, Kyle; id_orcid, Godlee, John   +3 more
core   +2 more sources

Land Surface Phenology in Global Change Studies

As of this writing, there are two global phenology products in the twentyfirst century at 500 m spatial resolution. Here we present a comparative analysis of the mid-green-up phenometric from these standard VIIRS and MODIS products for the year 2022. We evaluate the results by ecoregion and biome and report linear regression results to compare on the ...
Kirsten M. de Beurs, Erin Driscoll, Geoffrey M. Henebry   +2 more
openaire   +2 more sources

Retrospective image analysis for long‐term demography using Google Earth imagery

Remote Sensing in Ecology and Conservation, EarlyView.
We demonstrate that high‐resolution Google Earth imagery, combined with minimal field validation, enables retrospective tracking of individual invasive plants. The image shows one of the monitored individuals of Opuntia sp. in Greece. Our approach reveals long‐term demographic patterns, recruitment dynamics, and spatial expansion without continuous ...
Erola Fenollosa, Garrett Cohen, Roberto Salguero‐Gómez   +2 more
wiley   +1 more source

Land Surface Phenology for Africa - A Case of the Republic of Ghana

Journal of Geomatics
Understanding Earth’s surface phenology at different spatiotemporal scales is fundamental in evaluating the interaction between biogeographical distributions and climate dynamics. Despite remarkable achievements in remote sensing and Earth-observing technologies, there is a deficiency of African studies in land surface phenology (LSP). The article is a
Michael Stanley Peprah, Raymond Quardwo Awase, Abigail Odoom, Michael Angbang Mwin   +3 more
openaire   +1 more source

Tracking Wintertime Behaviour of Emperor Penguins Using High‐Resolution Synthetic Aperture Radar Imagery

Remote Sensing in Ecology and Conservation, EarlyView.
Using 25–30 cm Umbra synthetic aperture radar (SAR) imagery combined with ground validation of our observations, we introduce a method to track the phenology of emperor penguins during the Antarctic winter. We successfully identified events in the breeding cycle, which were previously impossible to observe during the complete darkness of Antarctic ...
Michelle LaRue, Daniel Price, Sarah Wiki‐Bennett, Charles K. Lee, B. Jack Pan, Kyle McCloud, Heather Cruickshank, Alex Ponniah, Daniel Zitterbart, Alexander Winterl, Céline Le Bohec, Rose Foster‐Dyer, Peter Fretwell   +12 more
wiley   +1 more source

VCPNET: A new dataset to benchmark vegetation carbon phenology metrics

Ecological Informatics
Shifts in plant phenology associated with climate change have received unprecedented attention from land managers, policymakers, and the scientific community, with important implications for the structure and function of the biosphere.
Xuan Tang, Gregory Starr, Christina L. Staudhammer, Kaidi Zhang, Longwei Li, Nan Li, Fathielrahaman H. Ajloon, Yuan Gong   +7 more
doaj   +1 more source

Plant phenology evaluation of CRESCENDO land surface models using satellite-derived Leaf Area Index – Part 2: Seasonal trough, peak, and amplitude [PDF]

Biogeosciences
Leaf area index is an important metric for characterising the structure of vegetation canopies and scaling up leaf and plant processes to assess their influence on regional and global climate. Earth observation estimates of leaf area index have increased
D. Peano, D. Hemming, C. Delire, Y. Fan, Y. Fan, H. Lee, H. Lee, S. Materia, S. Materia, J. E. M. S. Nabel, J. E. M. S. Nabel, T. Park, T. Park, D. Wårlind, A. Wiltshire, A. Wiltshire, S. Zaehle   +16 more
doaj   +1 more source

Remote Sensing of Land Surface Phenology: Progress, Challenges, Prospects

The process of observing land surface phenology (or LSP) using remote sensing satellites is fundamentally different from ground level observation of phenophase transitions of specific organisms. The scale disparity between the spatial extent of the organisms and the spatial resolution of the sensor leads to an ill-defined mixture of targets and ...
Geoffrey M. Henebry, Kirsten M. de Beurs
openaire   +2 more sources