E. V. YAKUSHEV, O.I.PODYMOV
Southern Branch of P.P.Shirshov Institute of Oceanology,
Gelendzhik, Russia
o Gelendzhik
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INTERANNUAL DYNAMICS OF THE BLACK SEA ANOXIC ZONE BOUNDARY IN CONNECTION WITH CLIMATIC VARIABILITY презентация
Содержание
- 1. INTERANNUAL DYNAMICS OF THE BLACK SEA ANOXIC ZONE BOUNDARY IN CONNECTION WITH CLIMATIC VARIABILITY
- 2. Oxic/anoxic interface O2 and NO3 dissappears
- 3. Data of Shirshov Institute of Oceanology expeditions
- 4. Interannual variability of H2S onset and averaged
- 5. Interannual variability of H2S, NH4,Mn, CH4 onsets and averaged O2 content in CIL
- 6. Scheme of oxygen balance in the Black Sea
- 7. Anoxic boundary position is an indicator of
- 8. STUDY OF THE SEASONAL VARIABILITY OF HYDROCHEMICAL
- 9. Gelendzhik bay restricted water exchange with
- 10. SB SIO occupies the area of 18 hectares (marked with green). Blue Bay
- 11. Sampling in 2 points every
- 12. Winter 2001 survey Salinity, psu Si ,
- 13. Oil products on the surface 25.06.2001
- 14. Seasonal changes in 2000 seasonality rains CGel>CGol P-limited
- 15. Seasonal variability of dissolved oxygen (left)
- 16. Gelendzhik Bay is a local source of
Слайд 1INTERANNUAL DYNAMICS OF THE BLACK SEA ANOXIC ZONE BOUNDARY IN CONNECTION
WITH CLIMATIC VARIABILITY
Слайд 2Oxic/anoxic interface
O2 and NO3 dissappears
H2S, NH4, CH4 and Mn2+ onsets
Changeability (maxNO3,
minPO4, grad H2S, grad Mn2+)
is situated below CIL with winter aeration
Stability ib the density field
region?
season?
eddies?
climate?
Слайд 4Interannual variability of H2S onset and averaged O2 content in CIL
Mean
winter air temperature(Gelendzhik)
T in the CIL core in summer-autumn
period (Krivosheya et al., 2002)
Oscillations of NAO indices
for winter period
Слайд 7Anoxic boundary position is an indicator of climatic changes.
Interannual oscillations of
the Black Sea H2S boundary at about
0.05-0.10 kg/m3 (5-10 m).
0.05-0.10 kg/m3 (5-10 m).
The change of volume of the oxic waters for about 5-10%, where the Black Sea oxic ecosystem is situated.
Such oscillations are vitally significant and should be studied.
CONCLUSIONS:
Слайд 8STUDY OF THE SEASONAL VARIABILITY OF HYDROCHEMICAL PARAMETERS IN THE NORTHEASTERN
BLACK SEA AS AN EXAMPLE OF GELENDZHIK AND GOLUBAYA BAYS
E. V. YAKUSHEV, E. A. ANTIPOVA,
V. K. CHASOVNIKOV, I. A. KOVALEVA
Southern Branch of P.P.Shirshov Institute of Oceanology,
Gelendzhik, Russia
o Gelendzhik
Слайд 11
Sampling in 2 points every week since 1999
Gelendzhik bay surveys in
January and June
O2, pH, Alk, PO4, Ptot, Si, NO3, NO2, NH4, Ntot,Urea, Mn, H2S, CH4,
Cd, Pb, Zn, Cu , Oil products, surfactants, phyto-, zoo-, bacteria- plankton
Position:
Слайд 13
Oil products on the surface 25.06.2001 (left) and 03.02.2005 (right).
extremely complex
and unstable hydrophysical structure ? Spot-like distribution.
local maximums of increased concentrations can be observed in
different parts of the bay and affect its ecosystem.
Слайд 15
Seasonal variability of dissolved oxygen (left) and phosphate (right) in Gelendzhik
(squares) and Golubaya (crosses) bays in 2000, 2003, 2004.
O2
PO4
waterspout events:
PO4>6.5 μМ, NO3>18 μМ, NH4>24 μМ
1.5 mln in 2000, 2.0 mln in 2004:
Increased eutrophication?
Слайд 16Gelendzhik Bay is a local source of pollution connected with resort
business:
Increased influx of man-made pollutants (heavy metals, oil, surfactants)
Phosphate doesn’t limit photosynthesis during the summer period.
Eutrophication: increased nutrient (N, P) influx in inorganic and organic forms.
Abnormal ecosystem development. Appearance of toxic species.
