Global Scale Trend Analysis of Earth Observation Based Phenology
Abstract
Vegetation phenology is an increasing interest of the scientific community. Interannual changes in phenology are indicators for natural (e.g. climatological) or unnatural (e.g. land degradation) drivers. Time series of earth observation based indices like NDVI give a good idea of the vegetations behaviour in the course of the year. Based on these temporal profiles, seasonality parameters like the start, end and length of season can be derived. In this study, we calculated such phenological indicators at a global scale from GIMMS (Global Inventory Modeling and Mapping Studies) data for the last 30 year. Gradual changes of these seasonality estimates were further investigated by means of trend analyses. The resulting global maps indicate where on earth the plants phenology is shifting and can be linked with underlying factors such as changing rainfall distribution, forest degradation etc. We further present an effort to downscale and interpret the global results on a local scale - with the focus on agricultural changes.
- Publication:
-
AGU Fall Meeting Abstracts
- Pub Date:
- December 2016
- Bibcode:
- 2016AGUFMGC53A1257V
- Keywords:
-
- 0402 Agricultural systems;
- BIOGEOSCIENCESDE: 0480 Remote sensing;
- BIOGEOSCIENCESDE: 1640 Remote sensing;
- GLOBAL CHANGEDE: 1934 International collaboration;
- INFORMATICS