Pub Date : 2024-06-27DOI: 10.1080/1755876x.2024.2364975
Florian Beiser, Håvard Heitlo Holm, Martin Lilleeng Sætra, Nils Melsom Kristensen, Kai Håkon Christensen
The shallow-water equations are often used as a classical simplified ocean model for barotropic ocean dynamics. The same equations can also be used to model simplified baroclinic dynamics through t...
{"title":"Combining barotropic and baroclinic simplified models for drift trajectory predictions","authors":"Florian Beiser, Håvard Heitlo Holm, Martin Lilleeng Sætra, Nils Melsom Kristensen, Kai Håkon Christensen","doi":"10.1080/1755876x.2024.2364975","DOIUrl":"https://doi.org/10.1080/1755876x.2024.2364975","url":null,"abstract":"The shallow-water equations are often used as a classical simplified ocean model for barotropic ocean dynamics. The same equations can also be used to model simplified baroclinic dynamics through t...","PeriodicalId":50105,"journal":{"name":"Journal of Operational Oceanography","volume":"84 1","pages":""},"PeriodicalIF":3.1,"publicationDate":"2024-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141931218","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-06-25DOI: 10.1080/1755876x.2024.2364974
Marcel Ricker, Arno Behrens, Joanna Staneva
Accurate wind wave data is essential for ship navigation, safety at sea, and offshore energy production. Access to real-time and forecast wave data, with quality metrics, is vital for operational s...
{"title":"The operational CMEMS wind wave forecasting system of the Black Sea","authors":"Marcel Ricker, Arno Behrens, Joanna Staneva","doi":"10.1080/1755876x.2024.2364974","DOIUrl":"https://doi.org/10.1080/1755876x.2024.2364974","url":null,"abstract":"Accurate wind wave data is essential for ship navigation, safety at sea, and offshore energy production. Access to real-time and forecast wave data, with quality metrics, is vital for operational s...","PeriodicalId":50105,"journal":{"name":"Journal of Operational Oceanography","volume":"18 1","pages":""},"PeriodicalIF":3.1,"publicationDate":"2024-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141575890","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-03-31DOI: 10.1080/1755876x.2024.2333596
Maryam Ghaemi, Samad Hamzei, Abolfazl Saleh, Sara Gholamipour
In this study, the results of hydrochemical measurement aboard the RV Kavoshgar Khalij Fars in the Persian Gulf (PG) in September 2018, May, and November 2019 are discussed. Nitrate, nitrite, ammon...
{"title":"Nutrient regimes in a semi-enclosed marginal sea: The Persian Gulf","authors":"Maryam Ghaemi, Samad Hamzei, Abolfazl Saleh, Sara Gholamipour","doi":"10.1080/1755876x.2024.2333596","DOIUrl":"https://doi.org/10.1080/1755876x.2024.2333596","url":null,"abstract":"In this study, the results of hydrochemical measurement aboard the RV Kavoshgar Khalij Fars in the Persian Gulf (PG) in September 2018, May, and November 2019 are discussed. Nitrate, nitrite, ammon...","PeriodicalId":50105,"journal":{"name":"Journal of Operational Oceanography","volume":"45 1","pages":""},"PeriodicalIF":3.1,"publicationDate":"2024-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140595481","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-03-25DOI: 10.1080/1755876x.2024.2331268
Tanuja Nigam, Vimlesh Pant
The Arabian Sea (AS), a basin in the North Indian Ocean (NIO), possesses strong coastal upwelling in its eastern and western margins. The spatio-temporal variability of upwelling over Somalia, Oman...
{"title":"Interannual variability of coastal upwelling features along the eastern and western margins of the Arabian Sea","authors":"Tanuja Nigam, Vimlesh Pant","doi":"10.1080/1755876x.2024.2331268","DOIUrl":"https://doi.org/10.1080/1755876x.2024.2331268","url":null,"abstract":"The Arabian Sea (AS), a basin in the North Indian Ocean (NIO), possesses strong coastal upwelling in its eastern and western margins. The spatio-temporal variability of upwelling over Somalia, Oman...","PeriodicalId":50105,"journal":{"name":"Journal of Operational Oceanography","volume":"5 1","pages":""},"PeriodicalIF":3.1,"publicationDate":"2024-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140299029","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-09-11DOI: 10.1080/1755876x.2023.2254133
Fu-Ming Tzu, Dong-Taur Su
This paper evaluates the energy-saving potential of ships by analyzing their carbon dioxide emissions on 20 oceanic voyages using weather routing. The Energy Efficiency Existing Ship Index (EEXI) is used to measure a ship's energy efficiency. The voyages include routes connecting major international seaports and hubs in Asia and North America. Practical measurements were taken on board the ships using weather routing reports and ship record data. The study reveals that the E05 and W05 routes are the most energy-efficient, while the E01 and W08 routes have the highest emissions and fuel consumption. The E05 route has the optimum EEXI and the lowest CO2 emissions. Conversely, the E10 route has the highest EEXI, while W08 has the highest fuel consumption and the worst EEXI. The study emphasises the importance of reducing greenhouse gas emissions and improving energy efficiency in the shipping industry. The results demonstrate the potential benefits of using weather routing and EEXI for assessing and improving the energy efficiency of ships.
{"title":"Evaluation of carbon dioxide emission based on energy efficiency existing ship index during oceanographic navigation","authors":"Fu-Ming Tzu, Dong-Taur Su","doi":"10.1080/1755876x.2023.2254133","DOIUrl":"https://doi.org/10.1080/1755876x.2023.2254133","url":null,"abstract":"This paper evaluates the energy-saving potential of ships by analyzing their carbon dioxide emissions on 20 oceanic voyages using weather routing. The Energy Efficiency Existing Ship Index (EEXI) is used to measure a ship's energy efficiency. The voyages include routes connecting major international seaports and hubs in Asia and North America. Practical measurements were taken on board the ships using weather routing reports and ship record data. The study reveals that the E05 and W05 routes are the most energy-efficient, while the E01 and W08 routes have the highest emissions and fuel consumption. The E05 route has the optimum EEXI and the lowest CO2 emissions. Conversely, the E10 route has the highest EEXI, while W08 has the highest fuel consumption and the worst EEXI. The study emphasises the importance of reducing greenhouse gas emissions and improving energy efficiency in the shipping industry. The results demonstrate the potential benefits of using weather routing and EEXI for assessing and improving the energy efficiency of ships.","PeriodicalId":50105,"journal":{"name":"Journal of Operational Oceanography","volume":"4651 1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135980466","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-09-02DOI: 10.1080/1755876X.2022.2068260
R. Akhila, J. Kuttippurath, B. Balan Sarojini, A. Chakraborty, R. Rahul
ABSTRACT We present a detailed long-term (1997–2019) analysis of observed cyclone-induced surface cooling (or cold wake) in the Arabian Sea. Here, the analysis is performed for 33 cyclones that drove significant cooling at the sea surface in three different seasons: the pre-monsoon, monsoon and post-monsoon. Our study shows that cyclones can cool the sea surface up to 4.76° C after their passage, depending on the intensity, duration and other factors that contribute to cooling. The monsoon and pre-monsoon cyclones show stronger cooling, but the post-monsoon cyclones exhibit a longer duration (8–10 days) of cooling and slower recovery time (15 days). In general, the pre- and monsoon cyclones exhibit a strong positive correlation with the Latent Heat Flux, whereas the post-monsoon cyclones show a higher correlation with Ekman Pumping Velocity, wind stress and intensity of cyclones. The cold wake composite analysis for the El-Niño, La-Niña and Normal years shows that cyclone-induced cooling is similar in El-Niño and La-Niña years, and the cooling is more dominant during the negative Indian Ocean Dipole (IOD) than that in the positive IOD years. Co-occurrence of positive IOD and La Niña events has led to more intense cyclones in recent decades. The power dissipation index, accumulated cyclone energy and oceanic heat content also show an increasing trend in AS and favour rapid intensification of cyclones. Since the drop in SST normally impedes cyclones from intensification, our study is important and the findings of this study will aid in tropical cyclone predictions. In response to rapid warming of Indian Ocean in recent decades, extreme events such as cyclones are expected to increase in the context of climate change.
{"title":"Observed tropical cyclone-driven cold wakes in the context of rapid warming of the Arabian Sea","authors":"R. Akhila, J. Kuttippurath, B. Balan Sarojini, A. Chakraborty, R. Rahul","doi":"10.1080/1755876X.2022.2068260","DOIUrl":"https://doi.org/10.1080/1755876X.2022.2068260","url":null,"abstract":"ABSTRACT We present a detailed long-term (1997–2019) analysis of observed cyclone-induced surface cooling (or cold wake) in the Arabian Sea. Here, the analysis is performed for 33 cyclones that drove significant cooling at the sea surface in three different seasons: the pre-monsoon, monsoon and post-monsoon. Our study shows that cyclones can cool the sea surface up to 4.76° C after their passage, depending on the intensity, duration and other factors that contribute to cooling. The monsoon and pre-monsoon cyclones show stronger cooling, but the post-monsoon cyclones exhibit a longer duration (8–10 days) of cooling and slower recovery time (15 days). In general, the pre- and monsoon cyclones exhibit a strong positive correlation with the Latent Heat Flux, whereas the post-monsoon cyclones show a higher correlation with Ekman Pumping Velocity, wind stress and intensity of cyclones. The cold wake composite analysis for the El-Niño, La-Niña and Normal years shows that cyclone-induced cooling is similar in El-Niño and La-Niña years, and the cooling is more dominant during the negative Indian Ocean Dipole (IOD) than that in the positive IOD years. Co-occurrence of positive IOD and La Niña events has led to more intense cyclones in recent decades. The power dissipation index, accumulated cyclone energy and oceanic heat content also show an increasing trend in AS and favour rapid intensification of cyclones. Since the drop in SST normally impedes cyclones from intensification, our study is important and the findings of this study will aid in tropical cyclone predictions. In response to rapid warming of Indian Ocean in recent decades, extreme events such as cyclones are expected to increase in the context of climate change.","PeriodicalId":50105,"journal":{"name":"Journal of Operational Oceanography","volume":"254 1","pages":"236 - 251"},"PeriodicalIF":3.1,"publicationDate":"2023-09-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79465512","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-05-23DOI: 10.1080/1755876x.2023.2215111
L. Ursella, S. Aronica, V. Cardin, G. Ciraolo, D. Deponte, C. Lo Re, A. Orasi, F. Capodici
{"title":"Calibration and validation of high frequency coastal radar waves exploiting in-situ observations and modelled data in the south-west Sicily","authors":"L. Ursella, S. Aronica, V. Cardin, G. Ciraolo, D. Deponte, C. Lo Re, A. Orasi, F. Capodici","doi":"10.1080/1755876x.2023.2215111","DOIUrl":"https://doi.org/10.1080/1755876x.2023.2215111","url":null,"abstract":"","PeriodicalId":50105,"journal":{"name":"Journal of Operational Oceanography","volume":"43 1","pages":""},"PeriodicalIF":3.1,"publicationDate":"2023-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86840821","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-03-15DOI: 10.1080/1755876x.2023.2186588
D. Ganguly, K. Suryanarayana, M. Raman
{"title":"Spatio-temporal variations in upwelling indices in Arabian Sea coastal upwelling systems and associated biological productivity using remote sensing observations","authors":"D. Ganguly, K. Suryanarayana, M. Raman","doi":"10.1080/1755876x.2023.2186588","DOIUrl":"https://doi.org/10.1080/1755876x.2023.2186588","url":null,"abstract":"","PeriodicalId":50105,"journal":{"name":"Journal of Operational Oceanography","volume":"122 1","pages":""},"PeriodicalIF":3.1,"publicationDate":"2023-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74655827","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-01-18DOI: 10.1080/1755876x.2023.2166213
M. Carrier, H. Ngodock, Scott R. Smith, Joseph M. D’Addezio, J. Osborne
{"title":"Impact of spatially-dense in-situ observations on ocean forecasts of mixed layer and thermocline depth","authors":"M. Carrier, H. Ngodock, Scott R. Smith, Joseph M. D’Addezio, J. Osborne","doi":"10.1080/1755876x.2023.2166213","DOIUrl":"https://doi.org/10.1080/1755876x.2023.2166213","url":null,"abstract":"","PeriodicalId":50105,"journal":{"name":"Journal of Operational Oceanography","volume":"14 1","pages":""},"PeriodicalIF":3.1,"publicationDate":"2023-01-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81793998","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-12-19DOI: 10.1080/1755876x.2022.2147701
E. Maturi, Lynn N. Shay, David R. Donahue, D. Byrne
{"title":"NOAA's operational satellite ocean heat content products","authors":"E. Maturi, Lynn N. Shay, David R. Donahue, D. Byrne","doi":"10.1080/1755876x.2022.2147701","DOIUrl":"https://doi.org/10.1080/1755876x.2022.2147701","url":null,"abstract":"","PeriodicalId":50105,"journal":{"name":"Journal of Operational Oceanography","volume":"1 1","pages":""},"PeriodicalIF":3.1,"publicationDate":"2022-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88300920","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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