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| Titel |
Development of a new expendable probe for the study of pelagic ecosystems from voluntary observing ships |
| VerfasserIn |
M. Marcelli, A. Maio, D. Donis, U. Mainardi, G. M. R. Manzella |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1812-0784
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| Digitales Dokument |
URL |
| Erschienen |
In: Ocean Science ; 3, no. 2 ; Nr. 3, no. 2 (2007-06-04), S.311-320 |
| Datensatznummer |
250000930
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| Publikation (Nr.) |
 copernicus.org/os-3-311-2007.pdf |
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| Zusammenfassung |
| Physical and biological processes of the marine ecosystem have a high
spatial and temporal variability, whose study is possible only through high
resolution and synoptic observations. The Temperature and Fluorescence
Launchable Probe was charted in order to answer to the claim of a cost
effective temperature and fluorescence expendable profiler, to be used in
ships of opportunity. The development of the expendable fluorometer has
followed similar concepts of the XBT (a wire conducting the signal to a
computer card), but differently from the latter it was developed with an
electronic system which can be improved and adapted to several variables
measure channels. To reach the aim of a low-cost probe, were utilized
commercial components: a glass bulb temperature resistor for the
temperature measurement, blue LEDs, a photodiode and available selective
glass filters, for the fluorescence measurement. The measurement principle
employed to detect phytoplankton's biomass is the active fluorescence. This
method is an in vivo chlorophyll estimation, that can get the immediate biophysical
reaction of phytoplankton inside the aquatic environment; it is a
non-disruptive method which gives real time estimation and avoids the
implicit errors due to the manipulation of samples. The possibility of using
a continuous profiling probe, with an active fluorescence measurement, is
very important in real time phytoplankton's study; it is the best way to
follow the variability of sea productivity. In fact, because of the high
time and space variability of phytoplankton, due to its capability to answer
in a relatively short time to ecological variations in its environment and
because of its characteristic patchiness, there isn't a precise quantitative
estimation of the biomass present in the Mediterranean Sea. |
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