A Look at Amazon Basin Seasonal Dynamics with the Biophysical ...
22.08.2015 • Views
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A Look at Amazon Basin Seasonal Dynamics with the Biophysical ...

A Look at Amazon Basin Seasonal Dynamics with the Biophysical ...

A Look at Amazon Basin Seasonal Dynamics with the Biophysical ...

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Speaker: Chrisopher PotterN<strong>at</strong>ional Aeronautics and Space Administr<strong>at</strong>ionTitle: Understanding global teleconnections of clim<strong>at</strong>e to regional s<strong>at</strong>elliteobserv<strong>at</strong>ions for <strong>Amazon</strong> ecosystem processes.Abstract. The influence of ocean surface p<strong>at</strong>terns, such as <strong>the</strong> El Niño-Sou<strong>the</strong>rnOscill<strong>at</strong>ion (ENSO), on <strong>at</strong>mospheric circul<strong>at</strong>ion and land surface clim<strong>at</strong>e have been notedas significant global teleconnections. Teleconnection is a term used in meteorologicalstudies to describe simultaneous vari<strong>at</strong>ion in clim<strong>at</strong>e and rel<strong>at</strong>ed processes over widelysepar<strong>at</strong>ed areas. Our LBA-ECO research team is investig<strong>at</strong>ing global teleconnections ofclim<strong>at</strong>e to regional s<strong>at</strong>ellite observ<strong>at</strong>ions for <strong>Amazon</strong> ecosystem processes, mainly in <strong>the</strong>form of monthly FPAR (fraction absorbed of photosyn<strong>the</strong>tically active radi<strong>at</strong>ion) over <strong>the</strong>period 1982-1999. Results from our analysis suggest th<strong>at</strong> s<strong>at</strong>ellite FPAR anomalies overlarge areas of <strong>the</strong> <strong>Amazon</strong> region west of 60 degrees longitude are strongly andneg<strong>at</strong>ively correl<strong>at</strong>ed <strong>with</strong> <strong>the</strong> Sou<strong>the</strong>rn Oscill<strong>at</strong>ion Index (SOI), whereas FPARanomalies over large areas of <strong>the</strong> region east of 60 degrees longitude are strongly andpositively correl<strong>at</strong>ed <strong>with</strong> SOI. Certain areas of <strong>the</strong> region appear to have strong linkagesin <strong>the</strong> s<strong>at</strong>ellite FPAR anomaly record to <strong>the</strong> North Atlantic Oscill<strong>at</strong>ion (NAO) index. Theimplic<strong>at</strong>ions of <strong>the</strong>se significant teleconnections of ocean clim<strong>at</strong>e to predictions of<strong>Amazon</strong> carbon cycling are reviewed.

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