Black Sea annual water balance
(average for 20th century,
data assembled by Sorokin, 2002)

Main data on the Black Sea
geography and hydrology

Black Sea biodiversity -
number of species

Freshwater supply by rivers

369 km³

Maximal depth

2212 m

Marine mammals

3

Atmospheric precipitation

224 km³

Longest distance from one to another shore

1200 km

Fish species

~180

Seawater inflow from Marmara Sea by Lower Bosporus Current

176 km³

Coastline length

4340 km

Benthic invertebrates

~1500

Black Sea water outflow via Bosporus

340 km³

Volume of the Black Sea

550 000 km³

Macroalgae

~300

Evaporation

395 km³

Surface of the Black Sea

423 000 km²

Phytoplankton species

~700

Surface of the drainage basin

2 300 000 km²

Zooplankton species

(holoplankton)

~150

Picnocline depth

50-150m

Surface layer salinity

170

 Black Sea home page

Salinity beneath the picnocline

20-300

Temperature beneath the thermocline

9^oC

Anoxic zone upper limit

140-200m

Living Black Sea © 2001-2005