JpGU-AGU Joint Meeting 2017

講演情報

[EE]Eveningポスター発表

セッション記号 H (地球人間圏科学) » H-GG 地理学

[H-GG01] [EE] Mapping phenology with long-term continuous remote sensing observations

2017年5月22日(月) 17:15 〜 18:30 ポスター会場 (国際展示場 7ホール)

[HGG01-P02] Long-term monitoring of land surface phenological changes

*堤田 成政1 (1.Graduate School of Global Environmental Studies, Kyoto Univeristy)

キーワード:Phenology, Remote sensing, Harmonic analysis

Land surface phenology (LSP) is associated with climate over space and time, and the monitoring of LSP help understandings of the terrestrial environmental changes. The LSP is often inferred by satellite observation, and long-term and regularly composite satellite imagery is now freely available. In this study, we demonstrate how LSP changes over space and time at the global scale over the last three decades by using GIMMS3g datasets. We focus on the magnitude and the timing of the peak of yearly phenological activity, estimated from a harmonic analysis. The first harmonic curve is regarded as a proxy of the overall productivity of vegetation and the second one is interpreted as a sensitive bimodal system changes. Results show the long-term trend of LSP changes; for example the peak of phenogical activity tend to be earlier in high-latitude regions.