File:Efflorescence verte 4 Cyanobacteria.JPG
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Summary
[edit]DescriptionEfflorescence verte 4 Cyanobacteria.JPG |
Français : Inflorescence planctonique. Ce sont a priori des cyanophycées (algue bleue). Dans ce cas, quelques heures (ici une quinzaine d'heure) après le début de l'épisode, les taches bleues se sont étendues.
Lieu : quai du Vault à Lille, non loin du centre ville (France), après une longue période pluvieuse (non caniculaire, et même sous les moyennes saisonnières, mais avec des nuits inhabituellement douces). Le canal proche (Deûle) est également couvert d’une couche de plancton vert sur de vastes surfaces (centaines de mètres carrés), mais beaucoup moins épaisse. Les échantillons dégagent une forte odeur d'algue (type spiruline). |
Date | |
Source | Own work |
Author | Lamiot |
Other versions | Derivative works of this file: Algal bloom banner Inflorescence.jpg |
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[edit]Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the section entitled GNU Free Documentation License.http://www.gnu.org/copyleft/fdl.htmlGFDLGNU Free Documentation Licensetruetrue |
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 12:57, 24 August 2007 | 2,560 × 1,920 (1.14 MB) | Lamiot (talk | contribs) | {{Information |Description= {{fr}} Inflorescence planctonique. Ce sont a priori des cyanophycées (algue bleue). Dans ce cas, quelques heures (ici une quinzaine d'heure) après le début de l'épisode, les taches bleues se sont étendues. <br>Les traces |
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Camera manufacturer | Panasonic |
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Camera model | DMC-FZ30 |
Exposure time | 1/80 sec (0.0125) |
F-number | f/4 |
ISO speed rating | 80 |
Date and time of data generation | 08:03, 24 August 2007 |
Lens focal length | 7.4 mm |
Orientation | Normal |
Horizontal resolution | 72 dpi |
Vertical resolution | 72 dpi |
Software used | Adobe Photoshop 7.0 |
File change date and time | 11:35, 24 August 2007 |
Y and C positioning | Co-sited |
Exposure Program | Normal program |
Exif version | 2.2 |
Date and time of digitizing | 08:03, 24 August 2007 |
Image compression mode | 4 |
APEX exposure bias | 0 |
Maximum land aperture | 3 APEX (f/2.83) |
Metering mode | Pattern |
Light source | Unknown |
Flash | Flash did not fire, compulsory flash suppression |
Color space | sRGB |
Sensing method | One-chip color area sensor |
Custom image processing | Normal process |
Exposure mode | Auto exposure |
White balance | Auto white balance |
Digital zoom ratio | 0 |
Focal length in 35 mm film | 35 mm |
Scene capture type | Standard |
Contrast | Normal |
Saturation | Normal |
Sharpness | Normal |