INVESTIGADORES
FERREYRA Gustavo Adolfo
artículos
Título:
Long term hydrographic conditions and climate trends in Potter Cove
Autor/es:
SCHLOSS, I.R., G.A. FERREYRA, O. GONZÁLEZ, A. ATENCIO, V. FUENTES, G. TOSONOTTO, G. MERCURI, R. SAHADE, M. TATIÁN AND D. ABELE
Revista:
Reports on Polar and Marine Research
Referencias:
Año: 2008 vol. 571 p. 382 - 389
Resumen:
A marked warming of mean air temperature has been recorded over the last 50
years in the Western Antarctic Peninsula (WAP) (see Turner et al., 2005 and
references therein). This rise in air temperature was mainly observed during the
autumn-winter months (Kejna, 2003). In particular, in King George Island (25 de
Mayo), South Shetlands air temperature rose on average by 1.1 oC between
1947 and 1995 (Ferron et al., 2004); if only the winter months are considered,
temperature increase in the same period amounts to 1.9 oC. This trend was also
apparent in the air temperature data from the meteorological station in Jubany
station for the decade 1994-2004 (Schloss, 2003). Climate warming in Antarctic
environments has been associated with glacier retreat and increased ice melting
(Cook et al., 2005) which, in turn, change the vertical structure of the water
column, especially in Antarctic shallow coastal environments in the WAP. Moreover,
glacier runoff has been shown to transport high particle loads, affecting
water column light climate and changing the optical conditions for phytoplankton
photosynthesis. Light and salinity changes are, therefore, indirect consequences
of regional air temperature increase. A direct effect on sea water temperature
could also be expected. Although stable sea water temperatures have
been recorded around Antarctica for a period of at least 10 million year (Peck,
2005), making it one of the most thermally stable environments on Earth there
is already some evidence on surface water temperature warming (Meredith and
King, 2005).
Since the beginning of the Argentinean German cooperation at Jubany Station
Dallmann laboratory, sea water temperature and salinity, as well as chlorophyll-
a and suspended particulate matter concentrations have been measured
in Potter Cove, in the vicinity of the station. Several projects, using hydrographical
data as central or complementary information were carried out. As a result,
a 15-years series of data is available, although there are many gaps, especially
in the winter months, when difficult weather conditions made sampling impossible.
In the present paper, a preliminary analysis of these series is presented
and discussed in the face of climatic change (warming) observed in the WAP
coastal ecosystems.
data as central or complementary information were carried out. As a result,
a 15-years series of data is available, although there are many gaps, especially
in the winter months, when difficult weather conditions made sampling impossible.
In the present paper, a preliminary analysis of these series is presented
and discussed in the face of climatic change (warming) observed in the WAP
coastal ecosystems.oC between
1947 and 1995 (Ferron et al., 2004); if only the winter months are considered,
temperature increase in the same period amounts to 1.9 oC. This trend was also
apparent in the air temperature data from the meteorological station in Jubany
station for the decade 1994-2004 (Schloss, 2003). Climate warming in Antarctic
environments has been associated with glacier retreat and increased ice melting
(Cook et al., 2005) which, in turn, change the vertical structure of the water
column, especially in Antarctic shallow coastal environments in the WAP. Moreover,
glacier runoff has been shown to transport high particle loads, affecting
water column light climate and changing the optical conditions for phytoplankton
photosynthesis. Light and salinity changes are, therefore, indirect consequences
of regional air temperature increase. A direct effect on sea water temperature
could also be expected. Although stable sea water temperatures have
been recorded around Antarctica for a period of at least 10 million year (Peck,
2005), making it one of the most thermally stable environments on Earth there
is already some evidence on surface water temperature warming (Meredith and
King, 2005).
Since the beginning of the Argentinean German cooperation at Jubany Station
Dallmann laboratory, sea water temperature and salinity, as well as chlorophyll-
a and suspended particulate matter concentrations have been measured
in Potter Cove, in the vicinity of the station. Several projects, using hydrographical
data as central or complementary information were carried out. As a result,
a 15-years series of data is available, although there are many gaps, especially
in the winter months, when difficult weather conditions made sampling impossible.
In the present paper, a preliminary analysis of these series is presented
and discussed in the face of climatic change (warming) observed in the WAP
coastal ecosystems.
data as central or complementary information were carried out. As a result,
a 15-years series of data is available, although there are many gaps, especially
in the winter months, when difficult weather conditions made sampling impossible.
In the present paper, a preliminary analysis of these series is presented
and discussed in the face of climatic change (warming) observed in the WAP
coastal ecosystems.oC. This trend was also
apparent in the air temperature data from the meteorological station in Jubany
station for the decade 1994-2004 (Schloss, 2003). Climate warming in Antarctic
environments has been associated with glacier retreat and increased ice melting
(Cook et al., 2005) which, in turn, change the vertical structure of the water
column, especially in Antarctic shallow coastal environments in the WAP. Moreover,
glacier runoff has been shown to transport high particle loads, affecting
water column light climate and changing the optical conditions for phytoplankton
photosynthesis. Light and salinity changes are, therefore, indirect consequences
of regional air temperature increase. A direct effect on sea water temperature
could also be expected. Although stable sea water temperatures have
been recorded around Antarctica for a period of at least 10 million year (Peck,
2005), making it one of the most thermally stable environments on Earth there
is already some evidence on surface water temperature warming (Meredith and
King, 2005).
Since the beginning of the Argentinean German cooperation at Jubany Station
Dallmann laboratory, sea water temperature and salinity, as well as chlorophyll-
a and suspended particulate matter concentrations have been measured
in Potter Cove, in the vicinity of the station. Several projects, using hydrographical
data as central or complementary information were carried out. As a result,
a 15-years series of data is available, although there are many gaps, especially
in the winter months, when difficult weather conditions made sampling impossible.
In the present paper, a preliminary analysis of these series is presented
and discussed in the face of climatic change (warming) observed in the WAP
coastal ecosystems.
data as central or complementary information were carried out. As a result,
a 15-years series of data is available, although there are many gaps, especially
in the winter months, when difficult weather conditions made sampling impossible.
In the present paper, a preliminary analysis of these series is presented
and discussed in the face of climatic change (warming) observed in the WAP
coastal ecosystems.