Template phenology for vegetation models

To assist the representation of phenology in vegetation models we created several templates of phenology-driver relations by characterizing the annual phase differences between phenology and two phenology drivers. We did this using the results of a cross spectral analysis of MODIS EVI with radiation...

Full description

Saved in:
Bibliographic Details
Main Authors: Bradley, Andrew, Gerard, France, Barbier, Nicolas, Weedon, Graham, Huntingford, Chris, Zelazowski, Przemyslaw, Anderson, Liana, de Aragao, Luiz, Kaduk, Jorg
Format: Conference Proceeding
Language:English
Subjects:
Atmospheric modeling
Biological system modeling
Discrete event simulation
Fourier transform
modeling
MODIS
Productivity
Remote monitoring
Remote sensing
Satellite applications
Spectral analysis
Timing
Vegetation mapping
Online Access:Request full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:To assist the representation of phenology in vegetation models we created several templates of phenology-driver relations by characterizing the annual phase differences between phenology and two phenology drivers. We did this using the results of a cross spectral analysis of MODIS EVI with radiation (CPTEC) and with precipitation (TRMM). Four phase ranges were identified for phenology-radiation and three phase ranges for phenology-precipitation. These ranges were classified and mapped together into 12 zones of our study area where particular phase relationships coincided. Around ~25% area was in phase with radiation, with varying phase ranges of precipitation, and ~16 % was in phase with precipitation with varying phase ranges of radiation. For each zone we conceptualized the phenology-driver relationships with phase lagged curves. The phase timing of these plots matched well with average time series plots from the same zones, but more work is needed on the representation of amplitude.
ISSN:2153-6996
2153-7003
DOI:10.1109/IGARSS.2009.5417570