Topic

Observing Solar-inducedChlorophyll Fluorescence from Space in the Amazon and Beyond

Speaker

Dr. Russell Doughty

Brief introduction to the report

Photosynthesis of the Amazon rainforest plays an important role in the regional and global carbon cycles, but, despite considerable in situ and space-based observations, it has been intensely debated whether there is a dry-season increase in greenness and photosynthesis of the moist tropical Amazonian forests. Solar-induced chlorophyll fluorescence (SIF), which is emitted by chlorophyll, has a strong positive linear relationship with photosynthesis at the canopy scale. Recent advancements have allowed us to observe SIF globally with Earth observation satellites.

He show results, which were recently published in Proceedings of the National Academy of Sciences (PNAS), that forest SIF did not decrease in the early dry season and increased substantially in the late dry season and early part of wet season, using SIF data from the Tropospheric Monitoring Instrument (TROPOMI), which has unprecedented spatial resolution and near-daily global coverage. He also presents results from an ongoing study in which we make global comparisons of satellite-based SIF, gross primary production, and vegetation indices.

When

2:00 – 4:00pm December 17, 2019

Where

Room A0701, IGSNRR

Host:

Prof. DONG Jinwei

From

Key Lab of Land Surface Pattern and Simulation of CAS