Sentences with phrase «chlorophyll fluorescence»
Advanced remote sensing methods provide observations of chlorophyll fluorescence from space.
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«Satellites map photosynthesis at high resolution: Precise measurement of the solar - induced chlorophyll fluorescence enables scientists to quantify gross primary production.»
The polarization characteristics of the water leaving radiance can provide information on bio-optical properties and composition of coastal water and can be used as well as a tool for the separation of chlorophyll fluorescence from elastic reflectance spectra.
In both cases the instrument showed changes in chlorophyll fluorescence that corresponded with declining plant health over time.
In order to use chlorophyll fluorescence in model development, a process - based description for it is required.
«Most instruments used for chlorophyll fluorescence imaging are only suitable for laboratory use, but we want to develop a system that can monitor crop health in a field or greenhouse,» said Haifeng Li, a member of the research group.
Using chlorophyll fluorescence measurements, a datalogger determined how efficiently the plants used the light they received.
Heat tolerance in food legumes as evaluated by cell membrane thermostability and chlorophyll fluorescence techniques.
The limited imaging area of commercially available chlorophyll fluorescence imagers restricts these instruments to imaging, at most, one or two seedlings at a time.
The CarbonSat proposal would also measure chlorophyll fluorescence, but its primary focus, like OCO - 2, is the monitoring of carbon dioxide sinks and sources.
Lead author Nigel D'Souza, then a postdoctoral researcher at Lamont, discovered the phytoplankton response to oil seeps while on a ship in the Gulf of Mexico monitoring chlorophyll fluorescence — energy that is emitted as light by compounds inside phytoplankton cells used for photosynthesis.
Niyogi grew Chlamydomonas mutants in low light and then videotaped chlorophyll fluorescence during a few minutes of illumination with high light, singling out mutants that didn't respond normally.
The scientists were able to compile multiple lines of evidence through chlorophyll fluorescence, water sampling and satellite images that all supported the idea that phytoplankton were benefitting from something connected with the seeps, even though the seeps were thousands of feet below.
After a cold and high light stress, thale - cress plants (wild - type and soq1) display less chlorophyll fluorescence, equivalent to more energy dissipation.
Researchers found that mutant plants with deficient levels of the lipocalin protein (soq1 lcnp) display high chlorophyll fluorescence.
The researchers compared GOSAT short - wave infrared Fourier transform spectrometer data collected between 2009 and 2013 with water level data from Gravity Recovery and Climate Experiment observations to approximate drought and used satellite measurements of solar - induced chlorophyll fluorescence as a proxy for vegetation levels.
Advanced remote sensing methods provide observations of chlorophyll fluorescence from space.
They used data of the NASA satellite «OCO - 2» (Orbiting Carbon Observatory 2) to map the so - called solar - induced chlorophyll fluorescence (SIF) at a much higher spatial resolution than possible from any other space instrument.
Gilerson, A., J. Zhou, M. Oo, J. Chowdhary, B.M. Gross, F. Moshary, and S. Ahmed, 2006: Retrieval of chlorophyll fluorescence from reflectance spectra through polarization discrimination: Modeling and experiments.
«Chlorophyll fluorescence imaging has been widely used in academic research,» said Li.
Chlorophyll fluorescence measurements are taken on the plant on the right side to determine how efficiently the plant uses the light provided by LEDs.
In order to use chlorophyll fluorescence in model development, a process - based description for it is required.
The image shows the monthly solar - induced chlorophyll fluorescence (SIF), produced from other space instruments.
Launched in 2014, OCO - 2 has shown the potential of chlorophyll fluorescence to help Earth scientists understand global fluxes of carbon dioxide in a warming world.
«Precise measurement of the solar - induced chlorophyll fluorescence, derived from OCO - 2 — but also from follow - on missions such as the European Sentinel - 5P, which will be launched coincidentally now on October 13th — enables scientists to quantify gross primary production and its contribution to the global carbon cycle,» says Guanter.
Chlorophyll fluorescence, antioxidant capacity, phenolic concentration, and flavonoid concentration were also measured in the study.
OCO - 2 advances photosynthesis observation from space via solar - induced chlorophyll fluorescence.
I've never seen plants light up, but «Solar - induced chlorophyll fluorescence» can be detected by scientists on the ground with spectrometers.
The average of five years (07 - 11) for (a) chlorophyll fluorescence observed from space, (b) modelled chlorophyll fluorescence, (c) modelled photosynthesis, (d) photosynthesis from upscaled data - based product.
In this work we implemented a chlorophyll fluorescence model developed at leaf scale to a global vegetation model JSBACH and we evaluated the model performance in terms of photosynthesis and chlorophyll fluorescence.
Additionally we compared the skill of chlorophyll fluorescence to commonly used vegetation index, fraction of photosynthetically active radiation that is more connected with the amount of green biomass than directly with photosynthesis.
Chlorophyll fluorescence takes place in the plant leaves simultaneously with photosynthesis, therefore a direct link between the two exists and chlorophyll fluorescence can be used to track photosynthesis.
The Finnish Meteorological Institute implemented the chlorophyll fluorescence model into a global vegetation model in collaboration with researchers from the Max Planck Institute.
Comparison at the CO2 flux sites revealed the capability of the chlorophyll fluorescence to track photosynthesis and possibilities for data assimilation applications.
Although ocean acidification and eutrophication states had an impact on physiological performance, chlorophyll fluorescence was not affected by those conditions.
The Finnish Meteorological Institute implemented the chlorophyll fluorescence model into a global vegetation model in collaboration with researchers from the Max Planck Institute.
Additionally we compared the skill of chlorophyll fluorescence to commonly used vegetation index, fraction of photosynthetically active radiation that is more connected with the amount of green biomass than directly with photosynthesis.
In this work we implemented a chlorophyll fluorescence model developed at leaf scale to a global vegetation model JSBACH and we evaluated the model performance in terms of photosynthesis and chlorophyll fluorescence.
The average of five years (07 - 11) for (a) chlorophyll fluorescence observed from space, (b) modelled chlorophyll fluorescence, (c) modelled photosynthesis, (d) photosynthesis from upscaled data - based product.
Chlorophyll fluorescence takes place in the plant leaves simultaneously with photosynthesis, therefore a direct link between the two exists and chlorophyll fluorescence can be used to track photosynthesis.
Comparison at the CO2 flux sites revealed the capability of the chlorophyll fluorescence to track photosynthesis and possibilities for data assimilation applications.
For almost 50 days, the sensors measured carbon dioxide and oxygen levels, temperature, salinity, and chlorophyll a fluorescence, which helps reveal biological production.