Evaluation of model-simulated tropical cyclone response on the biogeochemical parameters using profiling float observations in the Arabian Sea
Abstract In this study, the measurements from a Biogeochemical Argo float (A-float) were used to evaluate the capability of coupled bio-physical model using Regional Ocean Model System (ROMS) in simulating the physical and biogeochemical state during the Tropical Cyclone (TC) Ockhi in the northeaste...
Saved in:
| Main Authors: | , , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Nature Portfolio
2025-07-01
|
| Series: | Scientific Reports |
| Subjects: | |
| Online Access: | https://doi.org/10.1038/s41598-025-05034-9 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1849335208081358848 |
|---|---|
| author | V. P. Thangaprakash M. S. Girishkumar N. Sureshkumar S. K. Baliar Singh Kunal Chakraborty R. U. V. N. Satish T. V. S. Udaya Bhaskar E. Pattabhi Rama Rao M. Ravichandran |
| author_facet | V. P. Thangaprakash M. S. Girishkumar N. Sureshkumar S. K. Baliar Singh Kunal Chakraborty R. U. V. N. Satish T. V. S. Udaya Bhaskar E. Pattabhi Rama Rao M. Ravichandran |
| author_sort | V. P. Thangaprakash |
| collection | DOAJ |
| description | Abstract In this study, the measurements from a Biogeochemical Argo float (A-float) were used to evaluate the capability of coupled bio-physical model using Regional Ocean Model System (ROMS) in simulating the physical and biogeochemical state during the Tropical Cyclone (TC) Ockhi in the northeastern Arabian Sea (16.36°N and 69.66°E). In response to TC Ockhi, the mixed layer depth deepened upto 49 m depth due to strong winds-induced vertical mixing; however, the mixing influence can be evident upto 95 m depth from the A-float measurements. Due to this strong wind-induced vertical mixing and upwelling, the near-surface chlorophyll from A-float initially increased to 0.3 mg m−3 and gradually enhanced to a maximum of 3.6 mg m−3, within seven days after the passage of TC. This increase in chlorophyll leads to the enhancement of the primary productivity within euphotic depth by 1 g C m-2 day-1 compared to the pre-TC value. It is also found that, the TC-induced vertical mixing leads to a reduction (11 μM) in dissolved oxygen (DO) initially at the near-surface, followed by an increase of DO by 25 μM due to enhancement of the primary productivity. Although the ROMS model exhibited a similar temporal evolutions as apparent in observations, it consistently overestimated the near-surface chlorophyll and DO throughout the study period, except during the peak enhancement phase due to post-TC impact, where it showed slight underestimation (2 mg m-3). In response to TC, the ROMS simulated chlorophyll concentration increased to 1.7 mg m−3 due to enhancement of nitrate concentration (0.5 μM), which increased the estimated average primary productivity to 0.9 g C m−2 day−1 at the near-surface. The ROMS estimated chlorophyll attains the maximum peak at the near-surface within four days after the passage of TC, as compared with seven days from observations. |
| format | Article |
| id | doaj-art-5af2dd03b6ab44a190fd7d763c02f7f5 |
| institution | Kabale University |
| issn | 2045-2322 |
| language | English |
| publishDate | 2025-07-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Scientific Reports |
| spelling | doaj-art-5af2dd03b6ab44a190fd7d763c02f7f52025-08-20T03:45:20ZengNature PortfolioScientific Reports2045-23222025-07-0115111710.1038/s41598-025-05034-9Evaluation of model-simulated tropical cyclone response on the biogeochemical parameters using profiling float observations in the Arabian SeaV. P. Thangaprakash0M. S. Girishkumar1N. Sureshkumar2S. K. Baliar Singh3Kunal Chakraborty4R. U. V. N. Satish5T. V. S. Udaya Bhaskar6E. Pattabhi Rama Rao7M. Ravichandran8Indian National Centre for Ocean Information Services (INCOIS)Indian National Centre for Ocean Information Services (INCOIS)Indian National Centre for Ocean Information Services (INCOIS)Indian National Centre for Ocean Information Services (INCOIS)Indian National Centre for Ocean Information Services (INCOIS)Indian National Centre for Ocean Information Services (INCOIS)Indian National Centre for Ocean Information Services (INCOIS)Indian National Centre for Ocean Information Services (INCOIS)Indian National Centre for Ocean Information Services (INCOIS)Abstract In this study, the measurements from a Biogeochemical Argo float (A-float) were used to evaluate the capability of coupled bio-physical model using Regional Ocean Model System (ROMS) in simulating the physical and biogeochemical state during the Tropical Cyclone (TC) Ockhi in the northeastern Arabian Sea (16.36°N and 69.66°E). In response to TC Ockhi, the mixed layer depth deepened upto 49 m depth due to strong winds-induced vertical mixing; however, the mixing influence can be evident upto 95 m depth from the A-float measurements. Due to this strong wind-induced vertical mixing and upwelling, the near-surface chlorophyll from A-float initially increased to 0.3 mg m−3 and gradually enhanced to a maximum of 3.6 mg m−3, within seven days after the passage of TC. This increase in chlorophyll leads to the enhancement of the primary productivity within euphotic depth by 1 g C m-2 day-1 compared to the pre-TC value. It is also found that, the TC-induced vertical mixing leads to a reduction (11 μM) in dissolved oxygen (DO) initially at the near-surface, followed by an increase of DO by 25 μM due to enhancement of the primary productivity. Although the ROMS model exhibited a similar temporal evolutions as apparent in observations, it consistently overestimated the near-surface chlorophyll and DO throughout the study period, except during the peak enhancement phase due to post-TC impact, where it showed slight underestimation (2 mg m-3). In response to TC, the ROMS simulated chlorophyll concentration increased to 1.7 mg m−3 due to enhancement of nitrate concentration (0.5 μM), which increased the estimated average primary productivity to 0.9 g C m−2 day−1 at the near-surface. The ROMS estimated chlorophyll attains the maximum peak at the near-surface within four days after the passage of TC, as compared with seven days from observations.https://doi.org/10.1038/s41598-025-05034-9Tropical CycloneArabian SeaPrimary ProductivityBiogeochemical Argo floats |
| spellingShingle | V. P. Thangaprakash M. S. Girishkumar N. Sureshkumar S. K. Baliar Singh Kunal Chakraborty R. U. V. N. Satish T. V. S. Udaya Bhaskar E. Pattabhi Rama Rao M. Ravichandran Evaluation of model-simulated tropical cyclone response on the biogeochemical parameters using profiling float observations in the Arabian Sea Scientific Reports Tropical Cyclone Arabian Sea Primary Productivity Biogeochemical Argo floats |
| title | Evaluation of model-simulated tropical cyclone response on the biogeochemical parameters using profiling float observations in the Arabian Sea |
| title_full | Evaluation of model-simulated tropical cyclone response on the biogeochemical parameters using profiling float observations in the Arabian Sea |
| title_fullStr | Evaluation of model-simulated tropical cyclone response on the biogeochemical parameters using profiling float observations in the Arabian Sea |
| title_full_unstemmed | Evaluation of model-simulated tropical cyclone response on the biogeochemical parameters using profiling float observations in the Arabian Sea |
| title_short | Evaluation of model-simulated tropical cyclone response on the biogeochemical parameters using profiling float observations in the Arabian Sea |
| title_sort | evaluation of model simulated tropical cyclone response on the biogeochemical parameters using profiling float observations in the arabian sea |
| topic | Tropical Cyclone Arabian Sea Primary Productivity Biogeochemical Argo floats |
| url | https://doi.org/10.1038/s41598-025-05034-9 |
| work_keys_str_mv | AT vpthangaprakash evaluationofmodelsimulatedtropicalcycloneresponseonthebiogeochemicalparametersusingprofilingfloatobservationsinthearabiansea AT msgirishkumar evaluationofmodelsimulatedtropicalcycloneresponseonthebiogeochemicalparametersusingprofilingfloatobservationsinthearabiansea AT nsureshkumar evaluationofmodelsimulatedtropicalcycloneresponseonthebiogeochemicalparametersusingprofilingfloatobservationsinthearabiansea AT skbaliarsingh evaluationofmodelsimulatedtropicalcycloneresponseonthebiogeochemicalparametersusingprofilingfloatobservationsinthearabiansea AT kunalchakraborty evaluationofmodelsimulatedtropicalcycloneresponseonthebiogeochemicalparametersusingprofilingfloatobservationsinthearabiansea AT ruvnsatish evaluationofmodelsimulatedtropicalcycloneresponseonthebiogeochemicalparametersusingprofilingfloatobservationsinthearabiansea AT tvsudayabhaskar evaluationofmodelsimulatedtropicalcycloneresponseonthebiogeochemicalparametersusingprofilingfloatobservationsinthearabiansea AT epattabhiramarao evaluationofmodelsimulatedtropicalcycloneresponseonthebiogeochemicalparametersusingprofilingfloatobservationsinthearabiansea AT mravichandran evaluationofmodelsimulatedtropicalcycloneresponseonthebiogeochemicalparametersusingprofilingfloatobservationsinthearabiansea |