Next Article in Journal
Automated Plantation Mapping in Southeast Asia Using MODIS Data and Imperfect Visual Annotations
Next Article in Special Issue
Insect Target Classes Discerned from Entomological Radar Data
Previous Article in Journal
Structure-Aware Convolution for 3D Point Cloud Classification and Segmentation
Previous Article in Special Issue
Insect Monitoring Radar: Maximizing Performance and Utility
Open AccessArticle

High-Resolution Spatial Distribution of Bird Movements Estimated from a Weather Radar Network

1
Institute for Biodiversity and Ecosystem Dynamics, University of Amsterdam, P.O. Box 94248, 1090 GE Amsterdam, The Netherlands
2
R&D Observations and Data Technology, Royal Netherlands Meteorological Institute, De Bilt, 3731 GA, The Netherlands
3
Cornell Lab of Ornithology, Cornell University, Ithaca, 14850 NY, USA
*
Author to whom correspondence should be addressed.
Remote Sens. 2020, 12(4), 635; https://doi.org/10.3390/rs12040635
Received: 18 December 2019 / Revised: 5 February 2020 / Accepted: 7 February 2020 / Published: 14 February 2020
(This article belongs to the Special Issue Radar Aeroecology)
Weather radars provide detailed information on aerial movements of organisms. However, interpreting fine-scale radar imagery remains challenging because of changes in aerial sampling altitude with distance from the radar. Fine-scale radar imagery has primarily been used to assess mass exodus at sunset to study stopover habitat associations. Here, we present a method that enables a more intuitive integration of information across elevation scans projected in a two-dimensional spatial image of fine-scale radar reflectivity. We applied this method on nights of intense bird migration to demonstrate how the spatial distribution of migrants can be explored at finer spatial scales and across multiple radars during the higher flying en-route phase of migration. The resulting reflectivity maps enable explorative analysis of factors influencing their regional and fine-scale distribution. We illustrate the method’s application by generating time-series of composites of up to 20 radars, achieving a nearly complete spatial coverage of a large part of Northwest Europe. These visualizations are highly useful in interpreting regional-scale migration patterns and provide detailed information on bird movements in the landscape and aerial environment.
Keywords: radar aeroecology; avian migration; weather radar; vertical profiles of birds; polar volume radar aeroecology; avian migration; weather radar; vertical profiles of birds; polar volume
Show Figures

Graphical abstract

  • Supplementary File 1:

    RAR-Document (RAR, 26425 KB)

  • Externally hosted supplementary file 1
    Link: http://10.21942/uva.11365169.v2
    Description: Image sequence of bird migration Netherlands and Belgium (2016-10-3)
  • Externally hosted supplementary file 2
    Doi: 10.21942/uva.11365295.v2
    Description: Image sequence of bird migration Netherlands, Germany and Belgium (2017-10-18)
MDPI and ACS Style

Kranstauber, B.; Bouten, W.; Leijnse, H.; Wijers, B.-C.; Verlinden, L.; Shamoun-Baranes, J.; Dokter, A.M. High-Resolution Spatial Distribution of Bird Movements Estimated from a Weather Radar Network. Remote Sens. 2020, 12, 635.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop