Piontkovski, SA,Al-Gheilani, HMH,Jupp, B,Sarma, YVB,Al-Azri, AR
The relationship between algal blooms, fish kill incidents, and oxygen depletions along the Omani coast Journal Article
In: International Journal of Oceans and Oceanography, vol. 6, no. 429, pp. 145-177, 2012, ISBN: 0973-2667.
Abstract | BibTeX | Tags: Arabian Sea, fish kill, Gulf of Oman, Harmful Algal Bloom, mass mortality, oxygen minimum, Sea of Oman, seasonal change, Sultanate of Oman
@article{,
title = {The relationship between algal blooms, fish kill incidents, and oxygen depletions along the Omani coast},
author = {Piontkovski, SA,Al-Gheilani, HMH,Jupp, B,Sarma, YVB,Al-Azri, AR},
issn = {0973-2667},
year = {2012},
date = {2012-01-01},
journal = {International Journal of Oceans and Oceanography},
volume = {6},
number = {429},
pages = {145-177},
abstract = {A persistence of hypoxia is a common feature for the Sea of Oman, and the
western Arabian Sea. By using historical data complemented by ongoing
measurements, the relationship between the frequency of harmful algal
blooms, fish kill incidents, and oxygen depletions, was investigated. In the Sea
of Oman, the seasonal pattern exhibited a tendency of fish kill incidents to
increase, from January to November. In the western Arabian Sea, the pattern
was different- maximal occurrence of fish kill incidences was observed in
December and January. In 1988-2011, the number of harmful algal blooms
accompanied by fish kills was 4 times higher for the Sea of Oman (N= 91)
compared to the Arabian Sea coast (N= 22), whereas the total number of fish
kill incidents was about the same (22 versus 25). This means that the Arabian
Sea coast faced more frequent harmful blooms than the Sea of Oman. The Sea
of Oman coastal time series of the dissolved oxygen concentration implied a
steady decline throughout the year, from January to December. The fish kill
incidents in this region were mainly driven by oxygen depletions, whereas in
the Arabian Sea these incidents were mediated by the harmful algal blooms
along with the oxygen depletions. In analyzing the Omani coast as a whole,
the Ridge Multiple Regression Analysis implied the dissolved oxygen
concentration and monthly occurrence of algal blooms as the two variables
explaining 75% of the seasonal variations in fish kill incidents.},
keywords = {Arabian Sea, fish kill, Gulf of Oman, Harmful Algal Bloom, mass mortality, oxygen minimum, Sea of Oman, seasonal change, Sultanate of Oman},
pubstate = {published},
tppubtype = {article}
}
A persistence of hypoxia is a common feature for the Sea of Oman, and the
western Arabian Sea. By using historical data complemented by ongoing
measurements, the relationship between the frequency of harmful algal
blooms, fish kill incidents, and oxygen depletions, was investigated. In the Sea
of Oman, the seasonal pattern exhibited a tendency of fish kill incidents to
increase, from January to November. In the western Arabian Sea, the pattern
was different- maximal occurrence of fish kill incidences was observed in
December and January. In 1988-2011, the number of harmful algal blooms
accompanied by fish kills was 4 times higher for the Sea of Oman (N= 91)
compared to the Arabian Sea coast (N= 22), whereas the total number of fish
kill incidents was about the same (22 versus 25). This means that the Arabian
Sea coast faced more frequent harmful blooms than the Sea of Oman. The Sea
of Oman coastal time series of the dissolved oxygen concentration implied a
steady decline throughout the year, from January to December. The fish kill
incidents in this region were mainly driven by oxygen depletions, whereas in
the Arabian Sea these incidents were mediated by the harmful algal blooms
along with the oxygen depletions. In analyzing the Omani coast as a whole,
the Ridge Multiple Regression Analysis implied the dissolved oxygen
concentration and monthly occurrence of algal blooms as the two variables
explaining 75% of the seasonal variations in fish kill incidents.
western Arabian Sea. By using historical data complemented by ongoing
measurements, the relationship between the frequency of harmful algal
blooms, fish kill incidents, and oxygen depletions, was investigated. In the Sea
of Oman, the seasonal pattern exhibited a tendency of fish kill incidents to
increase, from January to November. In the western Arabian Sea, the pattern
was different- maximal occurrence of fish kill incidences was observed in
December and January. In 1988-2011, the number of harmful algal blooms
accompanied by fish kills was 4 times higher for the Sea of Oman (N= 91)
compared to the Arabian Sea coast (N= 22), whereas the total number of fish
kill incidents was about the same (22 versus 25). This means that the Arabian
Sea coast faced more frequent harmful blooms than the Sea of Oman. The Sea
of Oman coastal time series of the dissolved oxygen concentration implied a
steady decline throughout the year, from January to December. The fish kill
incidents in this region were mainly driven by oxygen depletions, whereas in
the Arabian Sea these incidents were mediated by the harmful algal blooms
along with the oxygen depletions. In analyzing the Omani coast as a whole,
the Ridge Multiple Regression Analysis implied the dissolved oxygen
concentration and monthly occurrence of algal blooms as the two variables
explaining 75% of the seasonal variations in fish kill incidents.
Piontkovski, Sergey A,Al-Gheilani, Hamed MH,Jupp, Barry P,Al-Azri, Adnan R,Al-Hashmi, Khalid A
Interannual changes in the Sea of Oman ecosystem Journal Article
In: Open Mar Biol J, vol. 6, no. 431, pp. 38-52, 2012.
Abstract | BibTeX | Tags: Gulf of Oman, Harmful Algal Bloom, Hydro-biology, Interannual variability, mass mortality, oceanography, Sea of Oman, Sultanate of Oman, zooplankton
@article{,
title = {Interannual changes in the Sea of Oman ecosystem},
author = {Piontkovski, Sergey A,Al-Gheilani, Hamed MH,Jupp, Barry P,Al-Azri, Adnan R,Al-Hashmi, Khalid A},
year = {2012},
date = {2012-01-01},
journal = {Open Mar Biol J},
volume = {6},
number = {431},
pages = {38-52},
abstract = {Historical data were used to estimate interannual tendencies for the Sea of Oman over the past 50 years.
Declining trends were shown for the atmospheric surface level pressure in the region affected by the Siberian High
atmospheric anomaly, the zonal component of wind speed, concentration of nitrates, biomass of diatoms and sardine
landings. Changes in Zooplankton biomass showed no clear trend. These trends were associated with and accompanied by
rising atmospheric temperature, sea surface temperature, annual variability of the kinetic energy of mesoscale eddies,
frequency of fish kills (along with the death of other animals- dolphins, turtles, and sea birds) and harmful algal bloom
incidents. In terms of interannual coupling between physical and biological processes, the evaluated trends imply that the
weakening of the Siberian High atmospheric anomaly results in the decline of the zonal wind speed and a regional
increase of air temperature. This in turn increases the temperature in the mixed layer which strengthens thermo-haline
stratification of the water column. Increasing stratification prevents the penetration of nutrients into the mixed layer and
does not favor the interannual increase of biological productivity, although annual variation of biological productivity has
increased, from 1997 to 2008.},
keywords = {Gulf of Oman, Harmful Algal Bloom, Hydro-biology, Interannual variability, mass mortality, oceanography, Sea of Oman, Sultanate of Oman, zooplankton},
pubstate = {published},
tppubtype = {article}
}
Historical data were used to estimate interannual tendencies for the Sea of Oman over the past 50 years.
Declining trends were shown for the atmospheric surface level pressure in the region affected by the Siberian High
atmospheric anomaly, the zonal component of wind speed, concentration of nitrates, biomass of diatoms and sardine
landings. Changes in Zooplankton biomass showed no clear trend. These trends were associated with and accompanied by
rising atmospheric temperature, sea surface temperature, annual variability of the kinetic energy of mesoscale eddies,
frequency of fish kills (along with the death of other animals- dolphins, turtles, and sea birds) and harmful algal bloom
incidents. In terms of interannual coupling between physical and biological processes, the evaluated trends imply that the
weakening of the Siberian High atmospheric anomaly results in the decline of the zonal wind speed and a regional
increase of air temperature. This in turn increases the temperature in the mixed layer which strengthens thermo-haline
stratification of the water column. Increasing stratification prevents the penetration of nutrients into the mixed layer and
does not favor the interannual increase of biological productivity, although annual variation of biological productivity has
increased, from 1997 to 2008.
Declining trends were shown for the atmospheric surface level pressure in the region affected by the Siberian High
atmospheric anomaly, the zonal component of wind speed, concentration of nitrates, biomass of diatoms and sardine
landings. Changes in Zooplankton biomass showed no clear trend. These trends were associated with and accompanied by
rising atmospheric temperature, sea surface temperature, annual variability of the kinetic energy of mesoscale eddies,
frequency of fish kills (along with the death of other animals- dolphins, turtles, and sea birds) and harmful algal bloom
incidents. In terms of interannual coupling between physical and biological processes, the evaluated trends imply that the
weakening of the Siberian High atmospheric anomaly results in the decline of the zonal wind speed and a regional
increase of air temperature. This in turn increases the temperature in the mixed layer which strengthens thermo-haline
stratification of the water column. Increasing stratification prevents the penetration of nutrients into the mixed layer and
does not favor the interannual increase of biological productivity, although annual variation of biological productivity has
increased, from 1997 to 2008.
Ponnampalam, Louisa S.
Dolphin Watching in Muscat, Sultanate of Oman: Tourist Perceptions and Actual Current Practice Journal Article
In: Tourism in Marine Environments, vol. 7, no. 435, pp. 81-93, 2011.
Abstract | Links | BibTeX | Tags: disturbance, dolphin watching, guidelines, impact, interview Survey, management, Oman, Perception, Questionnaire, Sea of Oman, Sultanate of Oman, tourism, Whale watching
@article{,
title = {Dolphin Watching in Muscat, Sultanate of Oman: Tourist Perceptions and Actual Current Practice},
author = {Ponnampalam, Louisa S.},
url = {http://www.ingentaconnect.com/content/cog/tme/2011/00000007/00000002/art00003,https://doi.org/10.3727/154427311X13038402065866},
year = {2011},
date = {2011-01-01},
journal = {Tourism in Marine Environments},
volume = {7},
number = {435},
pages = {81-93},
abstract = {Tourists who went dolphin watching in Muscat between December 2006 and June 2007 were asked to complete a questionnaire gauging the overall quality of their trips based on four main aspects: safety, educational value, perception of the boat driver's behavior, and overall satisfaction. Results showed that most tourists were satisfied with their dolphin-watching trip and that the majority felt that the boat drivers maintained a good distance between the boat and the dolphins, yet most also expressed the view that official guidelines should be established and implemented. However, awareness levels of tourists regarding the existence of dolphin-watching guidelines were low and tourist perceptions of their trips contrasted with observed practices, which reveal the current industry standards in Muscat to be lacking in many respects. The contrast is discussed and recommendations made for raising industry standards.},
keywords = {disturbance, dolphin watching, guidelines, impact, interview Survey, management, Oman, Perception, Questionnaire, Sea of Oman, Sultanate of Oman, tourism, Whale watching},
pubstate = {published},
tppubtype = {article}
}
Tourists who went dolphin watching in Muscat between December 2006 and June 2007 were asked to complete a questionnaire gauging the overall quality of their trips based on four main aspects: safety, educational value, perception of the boat driver's behavior, and overall satisfaction. Results showed that most tourists were satisfied with their dolphin-watching trip and that the majority felt that the boat drivers maintained a good distance between the boat and the dolphins, yet most also expressed the view that official guidelines should be established and implemented. However, awareness levels of tourists regarding the existence of dolphin-watching guidelines were low and tourist perceptions of their trips contrasted with observed practices, which reveal the current industry standards in Muscat to be lacking in many respects. The contrast is discussed and recommendations made for raising industry standards.
Shi, W,Morrison, John M,Böhm, Emanuele,Manghnani, Vijayakumar
The Oman upwelling zone during 1993, 1994 and 1995 Journal Article
In: Deep Sea Research Part II: Topical Studies in Oceanography, vol. 47, no. 472, pp. 1227-1247, 2000, ISBN: 0967-0645.
Abstract | BibTeX | Tags: Arabian Sea, Hydro-biology, Interannual variability, oceanography, Oman, sea surface temperature, seasonal variation, Sultanate of Oman, Upwelling
@article{,
title = {The Oman upwelling zone during 1993, 1994 and 1995},
author = {Shi, W,Morrison, John M,Böhm, Emanuele,Manghnani, Vijayakumar},
issn = {0967-0645},
year = {2000},
date = {2000-01-01},
journal = {Deep Sea Research Part II: Topical Studies in Oceanography},
volume = {47},
number = {472},
pages = {1227-1247},
abstract = {Satellite-derived sea-surface temperature, TOPEX/POSEIDON (T/P) sea-level anomalies
(SLAs), model wind data, and hydrographic data are used to characterize the upwelling along
the Oman coast during the US Joint Global Ocean Flux Study (US JGOFS) Arabian Sea
Process Study (ASPS) in 1995 as well as to look at interannual variability in the upwelling over
the period 1993}1995.
Empirical orthogonal function (EOF) analysis of the satellite-derived sea-surface temperature
(SST) at the locations of the US JGOFS standard stations shows the "rst mode, which
represents a biannual variability, contributes 67% of the total variance. In addition, the SST
shows the upwelling `fronta moving o!shore with the development of Southwest (SW) Monsoon
in early June 1995, reaching a maximum distance of approximately 120 km by late August
1995. Finally, SST shows the persistence of cold upwelling waters for nearly a month after the
end of the SW Monsoon within the bays along the Oman coast.
TOPEX/POSEIDON SLAs indicate that with the onset of the SW Monsoon, a 30-cm drop
in steric height is observed along the Oman coast associated the presence of the cool upwelled
waters. This drop in steric height sets up a horizontal pressure gradient and results in
a compensating along-shore, northeastward-#owing, geostrophic current (East Arabian
Current; EAC) during the SW Monsoon. Similarly, the altimeter data slow an o!shore decrease
in steric height during the Northeast (NE) Monsoon, indicating a seasonal reversal in direction
of the EAC with #ow to the southwest. Subsurface temperature data indicate that the actual
uplifting of isotherms associated with the upwelling can be found to a distance of approximately
260 km from the shore and to a depth of 150}200 m. Using along-track altimetry data, we
estimate that, for a region 260 km in o!shore distance and 600 km alongshore, 2.2]106,
1.4]106 and 0.55]106 m3 s~1 were upwelled through the 100 m level with upwelling velocities
O (2.0]10~5 m s~1), during the SW Monsoons of 1993, 1994 and 1995, respectively. The
reduced upwelling in the summer of 1995 is attributed to a reduction in wind-stress curl along
the Arabian coast when compared to 1993 and 1994. ( 2000 Elsevier Science Ltd. All rights
reserved.},
keywords = {Arabian Sea, Hydro-biology, Interannual variability, oceanography, Oman, sea surface temperature, seasonal variation, Sultanate of Oman, Upwelling},
pubstate = {published},
tppubtype = {article}
}
Satellite-derived sea-surface temperature, TOPEX/POSEIDON (T/P) sea-level anomalies
(SLAs), model wind data, and hydrographic data are used to characterize the upwelling along
the Oman coast during the US Joint Global Ocean Flux Study (US JGOFS) Arabian Sea
Process Study (ASPS) in 1995 as well as to look at interannual variability in the upwelling over
the period 1993}1995.
Empirical orthogonal function (EOF) analysis of the satellite-derived sea-surface temperature
(SST) at the locations of the US JGOFS standard stations shows the "rst mode, which
represents a biannual variability, contributes 67% of the total variance. In addition, the SST
shows the upwelling `fronta moving o!shore with the development of Southwest (SW) Monsoon
in early June 1995, reaching a maximum distance of approximately 120 km by late August
1995. Finally, SST shows the persistence of cold upwelling waters for nearly a month after the
end of the SW Monsoon within the bays along the Oman coast.
TOPEX/POSEIDON SLAs indicate that with the onset of the SW Monsoon, a 30-cm drop
in steric height is observed along the Oman coast associated the presence of the cool upwelled
waters. This drop in steric height sets up a horizontal pressure gradient and results in
a compensating along-shore, northeastward-#owing, geostrophic current (East Arabian
Current; EAC) during the SW Monsoon. Similarly, the altimeter data slow an o!shore decrease
in steric height during the Northeast (NE) Monsoon, indicating a seasonal reversal in direction
of the EAC with #ow to the southwest. Subsurface temperature data indicate that the actual
uplifting of isotherms associated with the upwelling can be found to a distance of approximately
260 km from the shore and to a depth of 150}200 m. Using along-track altimetry data, we
estimate that, for a region 260 km in o!shore distance and 600 km alongshore, 2.2]106,
1.4]106 and 0.55]106 m3 s~1 were upwelled through the 100 m level with upwelling velocities
O (2.0]10~5 m s~1), during the SW Monsoons of 1993, 1994 and 1995, respectively. The
reduced upwelling in the summer of 1995 is attributed to a reduction in wind-stress curl along
the Arabian coast when compared to 1993 and 1994. ( 2000 Elsevier Science Ltd. All rights
reserved.
(SLAs), model wind data, and hydrographic data are used to characterize the upwelling along
the Oman coast during the US Joint Global Ocean Flux Study (US JGOFS) Arabian Sea
Process Study (ASPS) in 1995 as well as to look at interannual variability in the upwelling over
the period 1993}1995.
Empirical orthogonal function (EOF) analysis of the satellite-derived sea-surface temperature
(SST) at the locations of the US JGOFS standard stations shows the "rst mode, which
represents a biannual variability, contributes 67% of the total variance. In addition, the SST
shows the upwelling `fronta moving o!shore with the development of Southwest (SW) Monsoon
in early June 1995, reaching a maximum distance of approximately 120 km by late August
1995. Finally, SST shows the persistence of cold upwelling waters for nearly a month after the
end of the SW Monsoon within the bays along the Oman coast.
TOPEX/POSEIDON SLAs indicate that with the onset of the SW Monsoon, a 30-cm drop
in steric height is observed along the Oman coast associated the presence of the cool upwelled
waters. This drop in steric height sets up a horizontal pressure gradient and results in
a compensating along-shore, northeastward-#owing, geostrophic current (East Arabian
Current; EAC) during the SW Monsoon. Similarly, the altimeter data slow an o!shore decrease
in steric height during the Northeast (NE) Monsoon, indicating a seasonal reversal in direction
of the EAC with #ow to the southwest. Subsurface temperature data indicate that the actual
uplifting of isotherms associated with the upwelling can be found to a distance of approximately
260 km from the shore and to a depth of 150}200 m. Using along-track altimetry data, we
estimate that, for a region 260 km in o!shore distance and 600 km alongshore, 2.2]106,
1.4]106 and 0.55]106 m3 s~1 were upwelled through the 100 m level with upwelling velocities
O (2.0]10~5 m s~1), during the SW Monsoons of 1993, 1994 and 1995, respectively. The
reduced upwelling in the summer of 1995 is attributed to a reduction in wind-stress curl along
the Arabian coast when compared to 1993 and 1994. ( 2000 Elsevier Science Ltd. All rights
reserved.
Matsuyama, Masaji,Kitade, Yujiro,Senjyu, Tomoharu,Koike, Yoshio,Ishimaru, Takashi
Vertical structure of a current and density front in the Strait of Hormuz Journal Article
In: Offshore Environments of the ROPME after the War related Oil-Spill, no. 402, pp. 23-34, 1998.
BibTeX | Tags: currents, Musandam, oceanography, Sea of Oman, Strait of Hormuz, Sultanate of Oman
@article{,
title = {Vertical structure of a current and density front in the Strait of Hormuz},
author = {Matsuyama, Masaji,Kitade, Yujiro,Senjyu, Tomoharu,Koike, Yoshio,Ishimaru, Takashi},
year = {1998},
date = {1998-01-01},
journal = {Offshore Environments of the ROPME after the War related Oil-Spill},
number = {402},
pages = {23-34},
keywords = {currents, Musandam, oceanography, Sea of Oman, Strait of Hormuz, Sultanate of Oman},
pubstate = {published},
tppubtype = {article}
}