The onset of the growing season in northwestern Europe, mapped using MODIS NDVI and calibrated using phenological ground observations

P. S.A. Beck*, S. R. Karlsen, A. Skidmore, L. Nilsen, K. A. Høgda

*Corresponding author for this work

Research output: Contribution to conferencePaper

2 Citations (Scopus)

Abstract

Using Moderate Resolution Imaging Spectroradiometer (MODIS) normalized difference vegetation index (NDVI) data, we mapped the onset of spring in the years 2000-2004 in Fennoscandia. First, NDVI maximum value composite (MVC) time series were filtered and smoothed to remove noise. Next, pixel specific NDVI thresholds were calibrated using field observations of budburst in Betula pubescens Ehrh. (n = 81). This method achieves modest agreement between the predicted and observed dates (RMSE = 13 days). The resulting maps show that the arrival of spring varies by more than two months within the study area and by more than a month between years. We illustrate how MODIS NDVI images track phenological patterns in great detail and can be used to monitor the effects of ongoing climate change.

Original languageEnglish
Publication statusPublished - 1 Dec 2005
Event31st International Symposium on Remote Sensing of Environment, ISRSE 2005: : Global Monitoring for Sustainability and Security - St. Petersburg, Russian Federation
Duration: 20 Jun 200524 Jun 2005
Conference number: 31
http://www.isprs.org/proceedings/2005/ISRSE/html/welcome.html

Conference

Conference31st International Symposium on Remote Sensing of Environment, ISRSE 2005:
Abbreviated titleISRSE 2005
CountryRussian Federation
CitySt. Petersburg
Period20/06/0524/06/05
Internet address

Keywords

  • Downy birch
  • Fennoscandia
  • Maximum value composites
  • MODIS
  • Phenology
  • ITC-GOLD

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