@Article{KorenSABGKKKLVSP:2018:WiReSu,
author = "Koren, Gerbrand and Schaik, Erik van and Ara{\'u}jo, Alessandro
C. and Boersma, K. Folkert and Gartner, Antje and Killaars, Lars
and Kooreman, Maurits L. and Kruijt, Bart and Laan-Luijkx, Ingrid
T. van der and Von Randow, Celso and Smith, Naomi E. and Peters,
Wouter",
affiliation = "{Wageningen University and Research} and {Wageningen University
and Research} and {Embrapa Amaz{\^o}nia Oriental CPATU} and
{Wageningen University and Research} and {Wageningen University
and Research} and {University of Groningen} and {Royal Netherlands
Meteorological Institute (KNMI)} and {Wageningen University and
Research} and {Wageningen University and Research} and {Instituto
Nacional de Pesquisas Espaciais (INPE)} and {Wageningen University
and Research} and {Wageningen University and Research}",
title = "Widespread reduction in sun-induced fluorescence from the Amazon
during the 2015/2016 El Niño",
journal = "Philosophical Transactions of the Royal Society B: Biological
Sciences",
year = "2018",
volume = "373",
number = "1760",
month = "Oct.",
keywords = "Amazon rainforest, drought response, tropical terrestrial carbon
cycle, El Nin˜o-Southern Oscillation, sun-induced fluorescence,
gross primary production.",
abstract = "The tropical carbon balance dominates year-to-year variations in
the CO2 exchange with the atmosphere through photosynthesis,
respiration and fires. Because of its high correlation with gross
primary productivity (GPP), observations of sun-induced
fluorescence (SIF) are of great interest. We developed a new
remotely sensed SIF product with improved signal-to-noise in the
tropics, and use it here to quantify the impact of the 2015/2016
El Niño Amazon drought. We find that SIF was strongly suppressed
over areas with anomalously high temperatures and decreased levels
of water in the soil. SIF went below its climatological range
starting from the end of the 2015 dry season (October) and
returned to normal levels by February 2016 when atmospheric
conditions returned to normal, but well before the end of
anomalously low precipitation that persisted through June 2016.
Impacts were not uniform across the Amazon basin, with the eastern
part experiencing much larger (10-15%) SIF reductions than the
western part of the basin (2-5%). We estimate the integrated loss
of GPP relative to eight previous years to be 0.34-0.48 PgC in the
three-month period October-November-December 2015.This article is
part of a discussion meeting issue 'The impact of the 2015/2016 El
Niño on the terrestrial tropical carbon cycle: patterns,
mechanisms and implications'.",
doi = "10.1098/rstb.2017.0408",
url = "http://dx.doi.org/10.1098/rstb.2017.0408",
issn = "1552-2814",
language = "en",
targetfile = "koren_widespread.pdf",
urlaccessdate = "02 maio 2024"
}