Research output: Contribution to journal › Article › peer-review
Dynamics of Hypoxic Zones in the Baltic Sea in the Late XX–Early XXI Century. / Litina, E. N.; Zakharchuk, E. A.; Tikhonova, N. A.
In: Water Resources, Vol. 47, No. 3, 01.05.2020, p. 478-485.Research output: Contribution to journal › Article › peer-review
}
TY - JOUR
T1 - Dynamics of Hypoxic Zones in the Baltic Sea in the Late XX–Early XXI Century
AU - Litina, E. N.
AU - Zakharchuk, E. A.
AU - Tikhonova, N. A.
PY - 2020/5/1
Y1 - 2020/5/1
N2 - Abstract: The data of shipboard measurements of oxygen concentration at international monitoring stations in the Baltic Sea were used to assess the year-to-year variations of oxygen regime in the late XX–early XXI century (1989–2017). The obtained results were compared with similar studies in 1951–1988. The water areas with hypoxic conditions were found to increase as well as their vertical development. The deterioration of oxygen regime was most considerable in the Gulf of Finland. While in the previous 30 years (1959–1988), hypoxic conditions were recorded only in the western part of the gulf and not in all years, since 1993, hypoxic zones were recorded here every year, developing eastward and appearing more and more often in its central and eastern parts. The analysis of variations of temperature and salinity revealed an increase in the difference between seawater densities in the surface and bottom layers of the Baltic Sea. An assumption was made that the deterioration of the oxygen regime in the Baltic Sea in the recent decades could be due to a stronger stratification of sea water masses.
AB - Abstract: The data of shipboard measurements of oxygen concentration at international monitoring stations in the Baltic Sea were used to assess the year-to-year variations of oxygen regime in the late XX–early XXI century (1989–2017). The obtained results were compared with similar studies in 1951–1988. The water areas with hypoxic conditions were found to increase as well as their vertical development. The deterioration of oxygen regime was most considerable in the Gulf of Finland. While in the previous 30 years (1959–1988), hypoxic conditions were recorded only in the western part of the gulf and not in all years, since 1993, hypoxic zones were recorded here every year, developing eastward and appearing more and more often in its central and eastern parts. The analysis of variations of temperature and salinity revealed an increase in the difference between seawater densities in the surface and bottom layers of the Baltic Sea. An assumption was made that the deterioration of the oxygen regime in the Baltic Sea in the recent decades could be due to a stronger stratification of sea water masses.
KW - hypoxic conditions
KW - quantile analysis
KW - stratification
KW - the Baltic Sea
KW - year-to-year variations
UR - http://www.scopus.com/inward/record.url?scp=85085321714&partnerID=8YFLogxK
U2 - 10.1134/S0097807820030082
DO - 10.1134/S0097807820030082
M3 - Article
AN - SCOPUS:85085321714
VL - 47
SP - 478
EP - 485
JO - Water Resources
JF - Water Resources
SN - 0097-8078
IS - 3
ER -
ID: 53818969