The 2013 FLEX—US Airborne Campaign at the Parker Tract Loblolly Pine Plantation in North Carolina, USA

Middleton, Elizabeth; Rascher, Uwe; Corp, Lawrence; Huemmrich, K.; Cook, Bruce; Noormets, Asko; Schickling, Anke; Pinto, Francisco; Alonso, Luis; Damm, Alexander; Guanter, Luis; Colombo, Roberto; Campbell, Petya; Landis, David; Zhang, Qingyuan; Rossini, Micol; Schuettemeyer, Dirk; Bianchi, Remo

doi:10.3390/rs9060612

Title: The 2013 FLEX—US Airborne Campaign at the Parker Tract Loblolly Pine Plantation in North Carolina, USA

Journal Article · Fri Jun 16 00:00:00 EDT 2017 · Remote Sensing

DOI:https://doi.org/10.3390/rs9060612· OSTI ID:1537157

Middleton, Elizabeth ^[1]; Rascher, Uwe ^[2]; Corp, Lawrence ^[3]; Huemmrich, K. ^[4]; Cook, Bruce ^[1]; Noormets, Asko ^[5];

^[2]; Pinto, Francisco ^[2]; Alonso, Luis ^[6]; Damm, Alexander ^[7]; Guanter, Luis ^[8]; Colombo, Roberto ^[9]; Campbell, Petya ^[4]; Landis, David ^[10]; Zhang, Qingyuan ^[11]; Rossini, Micol ^[9]; Schuettemeyer, Dirk ^[12]; Bianchi, Remo ^[13]

NASA Goddard Space Flight Center (GSFC), Greenbelt, MD (United States). Biospheric Sciences Lab.
Forschungszentrum Juelich (Germany).Inst. of Bio- and Geoscience
Science Systems & Applications Inc., Lanham, MD (United States)
Univ. of Maryland Baltimore County (UMBC), Baltimore, MD (United States). Joint Center for Earth Systems Technology
North Carolina State Univ., Raleigh, NC (United States). Dept. Forestry & Environmental Resources
Univ. of Valencia (Spain). Image Processing Laboratory (IPL)
Univ. of Zurich (Switzerland). Remote Sensing Lab.
German Research Center for Geosciences (GFZ), Potsdam (Germany). Helmholtz Centre Potsdam
Univ. of Milano-Bicocca,Milano (Italy). Dept. of Environmental Sciences
Global Science & Technology, Inc., Greenbelt, MD (United States)
Univ. Space Research Associates, Columbia, MD (United States)
Earth Observations (ESTEC), Noordwijk (The Netherlands)
Earth Observations (ESA-ESRIN), Frascati (Italy)

The first European Space Agency (ESA) and NASA collaboration in an airborne campaign to support ESA’s FLuorescence EXplorer (FLEX) mission was conducted in North Carolina, USA during September–October 2013 (FLEX-US 2013) at the Parker Tract Loblolly Pine (LP) Plantation (Plymouth, NC, USA). This campaign combined two unique airborne instrument packages to obtain simultaneous observations of solar-induced fluorescence (SIF), LiDAR-based canopy structural information, visible through shortwave infrared (VSWIR) reflectance spectra, and surface temperature, to advance vegetation studies of carbon cycle dynamics and ecosystem health. We obtained statistically significant results for fluorescence, canopy temperature, and tower fluxes from data collected at four times of day over two consecutive autumn days across an age class chronosequence. Both the red fluorescence (F685) and far-red fluorescence (F740) radiances had highest values at mid-day, but their fluorescence yields exhibited different diurnal responses across LP age classes. The diurnal trends for F685 varied with forest canopy temperature difference (canopy minus air), having a stronger daily amplitude change for young vs. old canopies. The Photochemical Reflectance Index (PRI) was positively correlated with this temperature variable over the diurnal cycle. Tower measurements from mature loblolly stand showed the red/far-red fluorescence ratio was linearly related to canopy light use efficiency (LUE) over the diurnal cycle, but performed even better for the combined morning/afternoon (without midday) observations. This study demonstrates the importance of diurnal observations for interpretation of fluorescence dynamics, the need for red fluorescence to understand canopy physiological processes, and the benefits of combining fluorescence, reflectance, and structure information to clarify canopy function versus structure characteristics for a coniferous forest.

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Research Organization:: North Carolina State University, Raleigh, NC (United States)

Sponsoring Organization:: USDOE Office of Science (SC)

Grant/Contract Number:: SC0006700

OSTI ID:: 1537157

Journal Information:: Remote Sensing, Vol. 9, Issue 6; ISSN 2072-4292

Publisher:: MDPICopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 26 works

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