0000000000358938

AUTHOR

Z. Malenovsky

showing 3 related works from this author

Beyond APAR and NPQ: Factors Coupling and Decoupling SIF and GPP Across Scales

2021

The connection between solar-induced fluorescence (SIF) and vegetation gross primary productivity is being widely investigated across spatial, temporal, and biological scales, including: a) studies at the leaf [1], [2], plant canopy [2]–[4] or satellite pixel scale [5], [6], b) temporally with studies spanning from diurnal [7] to seasonal scales [1], [3], [5], and b) biologically with studies covering various plant functional types (PFTs), e.g., crops [4], [7], deciduous [8] or evergreen forests [1], [3], in response to different sources of stress.

010504 meteorology & atmospheric sciences0211 other engineering and technologies02 engineering and technologyVegetationDecoupling (cosmology)15. Life on landEvergreenAtmospheric sciences01 natural sciencesGross primary productivityDeciduousPlant canopy021101 geological & geomatics engineering0105 earth and related environmental sciencesMathematics2021 IEEE International Geoscience and Remote Sensing Symposium IGARSS
researchProduct

Oxygen transmittance correction for solar-induced chlorophyll fluorescence measured on proximal sensing: Application to the NASA-GSFC fusion tower

2017

Since oxygen (O 2 ) absorption of light becomes more pronounced at higher pressure levels, even a few meters distance between the target and the sensor can strongly affect canopy-leaving Solar-Induced chlorophyll Fluorescence (SIF) retrievals. This study was conducted to quantify the consequent error propagation and the impact of ignoring oxygen absorption effects on proximal sensing SIF measurements based on the O 2 -A absorption band with field-acquired and simulated data. It was demonstrated that the uncorrected oxygen transmittance between target and sensor distance of 10 m can lead to SIF relative errors ranging from 66% to higher than 100% when using a Spectral Fitting (SF) technique …

0106 biological sciencesFusionMaterials science010504 meteorology & atmospheric sciencesAnalytical chemistrychemistry.chemical_elementRangingAtmospheric model01 natural sciencesOxygenchemistryAbsorption bandTransmittanceAbsorption (electromagnetic radiation)Chlorophyll fluorescence010606 plant biology & botany0105 earth and related environmental sciences2017 IEEE International Geoscience and Remote Sensing Symposium (IGARSS)
researchProduct

Photoprotection dynamics observed at leaf level from fast temporal reflectance changes

2018

Vegetation dynamically reacts to the available photosynthetically active radiation (PAR) by adjusting the photosynthetic apparatus to either a light harvesting or a photoprotective modus. When activating the photoprotection mechanism, either minor or major pigment-protein interactions may occur at the leaf level, resulting in different light absorption and consequently reflectance intensities. The reflectance changes were measured during sudden illumination transients designed to provoke fast adaptation to high irradiance. Different spectral reflectance change features were observed during different stages of photoprotection activation, extending over part of the visible spectral range (i.e…

0106 biological sciences0301 basic medicinePigmentsMaterials sciencePhotochemical Reflectance IndexPhotosynthesis01 natural sciencesFluorescenceReflectivity03 medical and health sciencesWavelength030104 developmental biologyPhotosynthetically active radiationPhotoprotectionVegetaciósense organsAbsorption (electromagnetic radiation)Biological system010606 plant biology & botany
researchProduct