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  1. Galleries
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  4. » Light pollution...

 
Light pollution......

Paesaggi con Elementi Umani/1

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Light pollution... sent on June 02, 2019 (22:57) by Rodema. 60 comments, 1273 views. [retina]

f/1.6, ISO 2000, hand held.

L'inquinamento luminoso è un'alterazione dei livelli di luce naturalmente presenti nell'ambiente notturno. Questa alterazione provoca danni di diversa natura: ambientali, scientifici, culturali ed economici. La definizione legislativa più utilizzata (vedi sotto) lo qualifica come "ogni irradiazione di luce diretta al di fuori delle aree a cui essa è funzionalmente dedicata, ed in particolare verso la volta celeste". Ogni anno si celebra una giornata di riflessione su questo problema mondiale, la prima delle quali si è celebrata il 28 febbraio 1991. Tra i danni ambientali si possono elencare: difficoltà o perdita di orientamento in diverse specie animali (uccellimigratori, tartarughe marine, falene notturne , chirotteri), alterazione del fotoperiodo in alcune piante, alterazione dei ritmi circadiani nelle piante, animali ed uomo (ad esempio la produzione della melatonina viene bloccata già con bassissimi livelli di luce). Recentemente (2001) è stato scoperto un nuovo fotorecettore che non contribuisce al meccanismo della visione, ma regola il nostro orologio biologico. Il picco di sensibilità di questo sensore è nella parte blu dello spettro visibile. Per questo le lampade con una forte componente di questo colore (come i LED) sono quelle che possono alterare maggiormente i nostri ritmi circadiani. Le lampade che fanno meno danno da questo punto di vista sono quelle al sodio ad alta pressione e, ancora meno dannose, quelle a bassa pressione. Il danno culturale principale è dovuto alla sparizione del cielo stellato dai paesi più inquinati, cielo stellato che è stato da sempre fonte di ispirazione per la religione, la filosofia, la scienza e la cultura in genere. Fra le scienze più danneggiate dalla sparizione del cielo stellato vi è senza dubbio l'astronomia sia amatoriale che professionale; un cielo troppo luminoso infatti limita fortemente l'efficienza dei telescopi ottici che devono sempre più spesso essere posizionati lontano da questa forma di inquinamento. Il danno economico è dovuto principalmente allo spreco di energia elettrica impiegata per illuminare inutilmente zone che non andrebbero illuminate, come la volta celeste, le facciate degli edifici privati, i prati e i campi a lato delle strade o al centro delle rotatorie. Anche per questo motivo uno dei temi trainanti della lotta all'inquinamento luminoso è quello del risparmio energetico. La spesa energetica annua per illuminare l'ambiente notturno è dell'ordine del miliardo di euro, non contando le spese di manutenzione degli apparecchi, sostituzione delle lampade, installazione di nuovi impianti. – (Fonte Wiki) --- Sul fondo possiamo vedere Genova e le sue mille luci, ripresa dalla Riviera di Ponente. --- ps: la panoramica è composta dall'unione di tre scatti orizzontali. --- (Rod)



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user147467
avatar
sent on June 02, 2019 (23:00) | This comment has been automatically translated (show/hide original)

Nice shot
and beautiful caption
Congratulations

avatarsupporter
sent on June 02, 2019 (23:09) | This comment has been automatically translated (show/hide original)

Dear Rod Bravo This is a little debated theme but that I care about even if I live in a dark place in fact if you look from the satellite Sardinia you see a huge patch of light in Cagliari another in Sassari and little stuff in other towns , the rest of Sardinia is immersed in the darkness and the countries of the interior of Winter seem the country of Pinocchio being immersed in a cold half-darkness, unfortunately from you the music changes and I saw in my last flight that now all the North is anthropomorphised without Continuity solution and then the night there is no darkness but it's light continues great sad thing, very big congratulations my friend for raising this serious problem a hug from Emme

avatarsenior
sent on June 02, 2019 (23:16) | This comment has been automatically translated (show/hide original)

Quoto the friend Emme
compliments Rod
As always attentive to what surrounds US
Claudio C

avatarsupporter
sent on June 02, 2019 (23:20)

Great shot...Rod...splendid place, picture and compo...bravo..bye Jean...

avatarsenior
sent on June 02, 2019 (23:20) | This comment has been automatically translated (show/hide original)

Great shot Rod, also excellent caption. A ciao Antonio :-P

avatarsenior
sent on June 02, 2019 (23:32) | This comment has been automatically translated (show/hide original)

@ Marzia
@ Emme
@ Claudio
@ Jean
@ Antonio
... Dear, I am very pleased to read that you also care about the problem, a problem that we speak little or nothing but of great importance, thank you very much for the welcome appreciation.
A dear greeting, Rod ;-)

avatarsenior
sent on June 03, 2019 (6:40) | This comment has been automatically translated (show/hide original)

Very important topic. Thank you so much for this document. A strong hug

avatarsenior
sent on June 03, 2019 (6:47) | This comment has been automatically translated (show/hide original)

Very nice for composition and PDR.
also good caption.
Hello.
Eus

avatarsenior
sent on June 03, 2019 (7:00) | This comment has been automatically translated (show/hide original)

@ Fiorella
@ Eus
... Thank you very much for leaving your very welcome appreciation.
A dear greeting and good start of the week.
Hello Rod ;-)

avatarsenior
sent on June 03, 2019 (17:52) | This comment has been automatically translated (show/hide original)

My dear Rod, you have really touched a sore point. City vertically illuminated day and night human concentrations irperbolic etc etc. Excellent all your speech graphic and textual
Hello ;-)

avatarsenior
sent on June 03, 2019 (17:56) | This comment has been automatically translated (show/hide original)

Interesting and particular shot.
Hi Lu. :-P

avatarsenior
sent on June 03, 2019 (18:24) | This comment has been automatically translated (show/hide original)

Think of us in the Po Valley that we also deal with air pollution :-( No one in Genoa would exchange with us, I believe :-( Hello

avatarsenior
sent on June 03, 2019 (18:46) | This comment has been automatically translated (show/hide original)

@ Jancuia
@ Luigi
@ Alberto.. without believe!! :-D
... I was very pleased to receive your most welcome appreciation... Thank you very much!!
A dear greeting Rod ;-)

avatarsenior
sent on June 03, 2019 (19:01) | This comment has been automatically translated (show/hide original)

Congratulations for both the photo and the caption

avatarsenior
sent on June 03, 2019 (21:47) | This comment has been automatically translated (show/hide original)

Carlo ... thanks you so much for the appreciation.
cheers, Rod;-)

avatarsupporter
sent on June 03, 2019 (21:52) | This comment has been automatically translated (show/hide original)

X me Rod The message is clear and direct
great depth
Bravo ;-)

avatarsenior
sent on June 03, 2019 (22:00) | This comment has been automatically translated (show/hide original)

Simone.. A message that at the time came to a few! .. Thank you very much for the appreciation.
Hello, Rod ;-)

avatarsupporter
sent on June 03, 2019 (22:16) | This comment has been automatically translated (show/hide original)

Very nice and gloomy shooting and interesting caption.

avatarsenior
sent on June 03, 2019 (22:29) | This comment has been automatically translated (show/hide original)

Claudio, thank you very much for leaving your very welcome comment.
Hello, Rod ;-)

avatarsupporter
sent on June 04, 2019 (0:07) | This comment has been automatically translated (show/hide original)

A disaster on all fronts, we believe we move forward and instead we do that run fast towards the abyss. Then we complain that there are no longer half seasons, in a few decades or hundreds or thousands of years there will be not even a season. The photo, I confess, has a bleak, despite Genoa Brilli of many lights.
Congratulations Rod, always shots thought!
Hello, Marisa :-)


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