Talk:Black Sea/Archive 1

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Archive 1

Editing needed by expert:

The following sentence from the text refers to a danger. It is not clear what this danger is. It is also not clear what is the nature of the other danger that the sentence refers to. Someone who knows the anoxic effect theories need to explain both dangers clearly and also clarify the extent to which they are real or hypothetical. "Another danger to people posed by the anoxic layer could come from a small asteroid's impact into the Black Sea. Recently modelling shows there is a significant threat to life for people living on the sea's shore." —Preceding unsigned comment added by (talk) 22:28, 6 January 2008 (UTC)

Geology or Limnology?

Moved comment by from page to here for discussionPollinator 13:09, 23 Mar 2004 (UTC):

This paragraph does not discuss the geology of the Black Sea... by definition a sea is comprised of liquid water and does not have 'geology.' This paragraph also does not discuss the geology of the region around the Black Sea. What it actually does discuss is the limnology of the Black Sea.

Satellite view

What are the red dots all over the image? 03:44, 19 Mar 2005 (UTC)

Geology / History

I sure feel stupid for asking, but what's a "sweetwater" lake?

Just a comment: In the History section, I read the first paragraph 4-5 times - I still don't get it.

The water of seas and oceans is salted. Opposed to that, the water of most lakes has far less salt and it is labeled "sweetwater" or "fresh water". See more at the article about fresh water. bogdan ʤjuʃkə | Talk 13:22, 31 May 2005 (UTC)
I changed the term "sweetwater" to "freshwater", as that definition of sweetwater was not in any dictionary I could find. In English, the term "freshwater" is universally understood to describe a body of water with a low salt concentration.--Acefox 30 June 2005 19:13 (UTC)

Net inflow of water?

This one is probably silly as well, but if there is a net inflow of sea water, and an extra inflow of fresh water, either the level is rising, or evaoporation is increasing at the same rate (and hence the sea is becoming more salty). Or is the net inflow of sea water from the Mediterranean being compensated by a net outflow of fresh water into the Mediterranean? I guess there's something I don't understand about the whole mechanism :o)

Not really an answer to your question -- but I read an article in Scientific American a decade or more ago, that said water flows in both directions through the dardenelles. The water flowing in one direction is less salty and less dense than the water flowing in the other direction. But I can't remember which direction the two flows are, or their relative volume of flow. I think I assumed, at the time, that they were of equal volume. The article says the salty layer starts at 150 meters. I didn't know the dardenelles was that deep. I wouldn't expect that depth if the deluge theory was correct. But, what do I know. -- Geo Swan 00:04, July 12, 2005 (UTC)

Yes, the section on the Black Sea water budget is in error. Warm, salty, and more dense water flows into the Black Sea through the lower layer of the Bosphorus Straits, while less salty, less dense, and often cooler water flows out of the Black Sea at the surface. Rough numbers are: Lower Bosphorus Layer, 300 km3/yr in; Bosphorus Surface Layer, 600 km3/yr out; Evaporation from the surface of the Black Sea, 300 km3/yr out; Precipitation to the surface of the Black Sea, 300 km3/yr in; River Inflow to the Black Sea, 300 km3/yr in. Details and exact values are discussed by Ünlüata et al (1990) and Latif et al (1991) and summarized by Özsoy and Ünlüata (1997). These authors assume the Black Sea salinity budget is close to balanced. That is, 300 km^3/yr of water with a salinity of ~36 psu flow in while 600 km3/yr of water with a salinity of ~18 psu flow out, yielding no change in the mass of salt to within some small error. This is a good approximation on short times scales (<100 years) but may be inaccurate on longer time scales. -Steve —Preceding unsigned comment added by (talk) 22:06, 6 December 2007 (UTC)

FURTHER COMMENT from TreeDoctor: The density of water decreases with increasing temperature in this temperature range. Thus, the warmer water from the Mediterranean would be less dense than the Black Sea, if temperature were the only difference. Salinity, however, has a much greater impact than temperature. The more saline water of the Mediterranean is much denser than the cooler, fresher water of the Black Sea.

  Also too... "salinated" would, I suppose, be the past participle of the transitive verb "salinate", which means to add salt to; which is to say, it's not the correct word.  A suggested re-write would be:    

Although the water in the Black Sea is cooler, it is considerably less saline than the Mediterranean, which gives it a lower density. This causes the outflow of water from the Black sea to float over the saline water entering the Black Sea from the Mediterranean. TreeDoctor (talk) 08:09, 17 February 2009 (UTC)TreeDoctor 17 Feb 2009

Interesting facts

Some interesting facts from this article:

  • last major tsunami was in 1901, with waves 5-metre high. Historically, in 104 AD, the Greek colony of Calatis (now Mangalia) was severely hit by another one.
  • the tides are only 11 cm high.
  • sometimes spontaneous ignition occurs (due to deep gases that reach the surface -- it would be great some more info on the exact chemical reactions). bogdan | Talk 20:33, 7 September 2005 (UTC)


The section on `History' at the end contradicts the section on `Name' at the start, suggesting that the name `Black Sea' was used by the Ancient Greeks. This should be fixed, one way or the other: I don't know who is right.

Mhardcastle 21:31, 12 January 2006 (UTC)

Should't therebe something about the history of the people that live/d around theBlack Sea,or at least something redirectig to other articles? The sea played such an important role in Eurpean and Near Easternhistory since anchient times, that it seems strange that reference is only made to the "scientific" facts around the sea and not its historical and cultural role.

Hydrogen Sulfide / Sulfuric Acid

I understand bacteria using sulfates as an oxidising agent for metabolism in anoxic conditions. However, I can't see the released H2S reacting with anoxic seawater to regenerate the SO42-. And even if it did, it wouldn't lead to precipitates of sulphides. The H2S, I suspect, remains in solution, reacting with metal ions to precipitate sulfide minerals.

I am not sufficiently familiar with sulfur chemistry to edit the text myself with any great assurance of getting it right, but I think this is an anomaly that needs input from someone who does know.--King Hildebrand 20:08, 12 August 2006 (UTC)

I'm not sure on this one, but perhaps the H2S reacts with sub-oxic seawater which is located in the intermediate layers, as well as reacting with metal ions. The info was taken from a 1974 paper, so the theory could need revising! (Oli b (talk) 00:27, 11 July 2008 (UTC)}

Geographic inconsistency/typo?

There appears to be a geographic inconsistency, perhaps a typo, in the section "Geology & Bathymetry". The sentence which reads "The southern edge around Turkey, and the western edge around Georgia ..." doesn't make sense as this western edge (of a sub-basin) would be against Bulgaria, not Georgia - which is to the eastern shore.

there is a very beautifu pictuaresque colour photo which is labeled "the black sea near Suchu, taken in 1915". I doubt such a high quality colour photo could have been taken back then ?!

It appears to be a Prokudin-Gorskii photo. See the relevant article on his methods to make color photographs. Khoikhoi 09:18, 23 December 2006 (UTC)


THe fauna section doesn't talk about fauna —The preceding unsigned comment was added by (talk) 08:33, 2 February 2007 (UTC).

That is because it is not yet written. If you have something to add, please register, and help the project out. Somnabot 00:06, 3 February 2007 (UTC)

Black Sea is a lake!

You can consider the Black Sea to be a true lake because of the very narrow river that leads into it. Other than that, more than 99% of the whole entire sea is surrounded by land (when including the Sea of Azov). A lake doesn't have to be precisely 100% surrounded by pure land. The Great Lakes, for example, are connected to the ocean by a waterway (which is exactly what the Bosphorous is). Also, it is at least 100 miles inland from the Mediterranean Sea, and is separated by a series of waterways and a "lake" just south. 23:08, 23 February 2007 (UTC)

Interesting point; however, you should know that the Great Lakes are at a significantly higher elevation than the Atlantic Ocean. That's why there are/were rapids on the St. Larwence River between Lake Ontario and the Gulf of St. Lawrence. Whereas I haven't heard of any similarly large elevation drop along the Bosphorus. I'd be interested in knowing what the elevation of the Black Sea is, though. AllGloryToTheHypnotoad (talk) 01:48, 31 May 2008 (UTC)

I would note that the St. Lawrence Seaway is not a natural formation, rather it is an amalgamation of various canals, natural waterways and locks and dams. (talk) 06:27, 3 June 2008 (UTC)
Fine, but the St. Lawrence River was a natural formation. That is, the lakes always drained into the Gulf. Humans have changed it since, yes. AllGloryToTheHypnotoad (talk) 15:10, 3 June 2008 (UTC)


When there is a list of resorts on the black sea, town Gagra (and others as well) are said to be not in Georgia only but in "Abkhazia, Georgia". i think it is the violation of Goergia's souverinity, as the teritory of Abkhazia is considend to be part of Goergia.

I think saying "Abkhazia, Georgia" is a good compromise between saying one or the other. See the de facto and de jure articles. Khoikhoi 03:50, 18 March 2007 (UTC)


It would be useful to mention the volume of the Black Sea for comparison with other seas and lakes. -Pgan002 03:31, 27 August 2007 (UTC)

Pontus Euxinus

In my historical atlas, the Sea is Named Pontus Euxinus, as opposed to Euxeinos Pontos stated in the artical. I do not speak latin, but from what I understand "Pontus" and "Pontos" are two different words meaning "Bridge" and "Sea", respectively. Is the change from "Pontos" to "pontus" due to placing it at the start rather than after Euxinus, or might it to do with the geographical area having been considered the link to the East by the West? Or, as the Latin word Mare was more commonly used for "Sea", might the word Pontus be in reference to the Pontus region on the southern coast of the sea? Just a thought. ArdClose 21:35, 4 September 2007 (UTC)

The -us ending is Latin, -os is Greek. 'Pontos' is Greek for sea, not Latin. 'Pons' (pont-) means bridge in Latin, but 'pontus' by itself seems to have been retained for this sea in particular as a Latin equivalent for Greek 'Pontos'. Til Eulenspiegel 21:50, 4 September 2007 (UTC)

Regional organizations?

What's the connection between the sea and GUAM or CDC? Half of GUAM members and 66% of CDC members don't even have a direct access to Black see or in case of the Baltic countries are way too far... GuggiePrg (talk) 19:40, 22 November 2007 (UTC)