Leaf fluorescence (discontinued)

2008-07-22 → 2017-08-09 Greenland Ecosystem Monitoring CC BY-SA 4.0

The effect of increased UV-B radiation on plant stress is monitored indirectly by measuring chlorophyll fluorescence in three series of plots: Controls, plots with a filter excluding UV-B, and filter controls with a film without exclusion of UV-B. Measurements of chlorophyll fluorescence are carried out on Betula nana and Vaccinium uliginosum in a mesic dwarf shrub heath dominated by Empetrum nigrum and with B. nana and V. uliginosum as subdominant species. For further details, please refer to the newest BioBasis manual available at the website.

Data and Resources

This dataset has no data

Additional Info

Field	Value
Source	https://data.g-e-m.dk/datasets/10.17897/SD1R-RF39
Version	1
Citation	Read the documentation, GEM terms of use and how to cite: https://data.g-e-m.dk/guides. Please get in touch with the GEM secretariat if you need help to cite correctly.
Temporal coverage	2008-07-22 → 2017-08-09
Spatial coverage	64.13°N, -51.38°E
Variable measured	Date (Text) Date of measurement https://data.g-e-m.dk/datasets/10.17897/SD1R-RF39#column=Date Time (Hour) Time of measurement (local time). Prior to 2023-10-28 West Greenland time zone was UTC -03:00 (UTC -02:00 during day light savings, aka summer time, which is from the last sunday in March to the last sunday in October). After 2023-10-28 West Greenland changed time zone to UTC -02:00 (UTC -02:00 during day light savings aka summer time) https://data.g-e-m.dk/datasets/10.17897/SD1R-RF39#column=Time Species (Text) Species Betula nana or Vaccinium uliginosumÂ https://data.g-e-m.dk/datasets/10.17897/SD1R-RF39#column=Species Plot (Number) Plot ID https://data.g-e-m.dk/datasets/10.17897/SD1R-RF39#column=Plot Treatment (Text) Controls (C), plots with a filter excluding UV-B (F), and filter controls with film without exclusion of UV-B (B).Â https://data.g-e-m.dk/datasets/10.17897/SD1R-RF39#column=Treatment Latitude (Number) Latitude of plot https://data.g-e-m.dk/datasets/10.17897/SD1R-RF39#column=Latitude Longitude (Number) Longitude of plot https://data.g-e-m.dk/datasets/10.17897/SD1R-RF39#column=Longitude Record No (Number) Record number https://data.g-e-m.dk/datasets/10.17897/SD1R-RF39#column=Record+No P. Light (Î¼mol m-2 s-1) Pre-illumination intensity https://data.g-e-m.dk/datasets/10.17897/SD1R-RF39#column=P.+Light P. Dur.(sec) (s) Pre-illumination duration https://data.g-e-m.dk/datasets/10.17897/SD1R-RF39#column=P.+Dur.(sec) Light (Î¼mol m-2 s-1) Flash intensity https://data.g-e-m.dk/datasets/10.17897/SD1R-RF39#column=Light Gain (Number) Brief measurement to determine likely size of Fo https://data.g-e-m.dk/datasets/10.17897/SD1R-RF39#column=Gain Dur.(sec) (s) Duration of flash https://data.g-e-m.dk/datasets/10.17897/SD1R-RF39#column=Dur.(sec) Flash (Number) Number of flashes https://data.g-e-m.dk/datasets/10.17897/SD1R-RF39#column=Flash Fo (Number) Fluorescence origin https://data.g-e-m.dk/datasets/10.17897/SD1R-RF39#column=Fo Fm (Number) Maximum fluorescence https://data.g-e-m.dk/datasets/10.17897/SD1R-RF39#column=Fm Fv (Number) Variable fluorescence (Fm-Fo) https://data.g-e-m.dk/datasets/10.17897/SD1R-RF39#column=Fv Fv/Fm (Number) Maximum quantum efficiency https://data.g-e-m.dk/datasets/10.17897/SD1R-RF39#column=Fv%2FFm Tfm (Number) Time at maximum Fm https://data.g-e-m.dk/datasets/10.17897/SD1R-RF39#column=Tfm Area (Number) Area above fluorescence curve https://data.g-e-m.dk/datasets/10.17897/SD1R-RF39#column=Area T1 ms (Î¼s) T1= 50 Î¼s https://data.g-e-m.dk/datasets/10.17897/SD1R-RF39#column=T1+ms F1 (Number) Fluorescence at T1 https://data.g-e-m.dk/datasets/10.17897/SD1R-RF39#column=F1 T2 ms (Î¼s) T2= 100 Î¼s https://data.g-e-m.dk/datasets/10.17897/SD1R-RF39#column=T2+ms F2 (Number) Fluorescence at T2 https://data.g-e-m.dk/datasets/10.17897/SD1R-RF39#column=F2 T3 ms (Î¼s) T3= 300 Î¼s https://data.g-e-m.dk/datasets/10.17897/SD1R-RF39#column=T3+ms F3 (Number) Fluorescence at T3 https://data.g-e-m.dk/datasets/10.17897/SD1R-RF39#column=F3 T4 ms (ms) T4= 2 ms https://data.g-e-m.dk/datasets/10.17897/SD1R-RF39#column=T4+ms F4 (Number) Fluorescence at T4 https://data.g-e-m.dk/datasets/10.17897/SD1R-RF39#column=F4 T5 ms (ms) T5= 30 ms https://data.g-e-m.dk/datasets/10.17897/SD1R-RF39#column=T5+ms F5 (Number) Fluorescence at T5 https://data.g-e-m.dk/datasets/10.17897/SD1R-RF39#column=F5 Protocol (Number) Protocol used (0=default) https://data.g-e-m.dk/datasets/10.17897/SD1R-RF39#column=Protocol Dark Offset (Number) Dark current measurement artefact https://data.g-e-m.dk/datasets/10.17897/SD1R-RF39#column=Dark+Offset RC / ABS (Number) Force due to the concentration of active reaction centers https://data.g-e-m.dk/datasets/10.17897/SD1R-RF39#column=RC+%2F+ABS Fv / Fo (Number) Force of the light reactions https://data.g-e-m.dk/datasets/10.17897/SD1R-RF39#column=Fv+%2F+Fo (1-Vj) / Vj (Number) Force related to the dark reactions (after Qa-) https://data.g-e-m.dk/datasets/10.17897/SD1R-RF39#column=(1-Vj)+%2F+Vj PI (Number) Performance indexÂ (PI) https://data.g-e-m.dk/datasets/10.17897/SD1R-RF39#column=PI Remarks (Text) Remarks https://data.g-e-m.dk/datasets/10.17897/SD1R-RF39#column=Remarks
Publisher	Greenland Ecosystem Monitoring