CC004
Circulation, Biogeochemistry, and Coupled Processes in the Indian Ocean: Variability and Vulnerability to Anthropogenic Change
Session ID#: 259883
Session Description:
The Indian Ocean is a dynamically complex and unique ocean basin, shaped by strong monsoonal forcing, distinct geography, and seasonally reversing circulation patterns. These features contribute to pronounced variability on intraseasonal to decadal timescales, with implications for regional weather systems, ocean-atmosphere coupling, and ecological and biogeochemical processes. Despite its central role in the global climate system, the Indian Ocean remains comparatively under-observed and under-studied. Advances continue to uncover unknown oceanic pathways, modes of variability, and feedbacks between circulation, air-sea interaction, and upper-ocean biogeochemistry. Uncertainties persist regarding the drivers of extreme events, the role of physical processes in shaping biogeochemical and ecological variability, and the predictability of coupled ocean-atmosphere dynamics in a changing climate. This session invites contributions that use observations, models, or theory to investigate Indian Ocean variability and its links to monsoons, extreme events, multi-scale mixing, air-sea exchanges of heat and climate-relevant trace gases, and global ocean-atmosphere variability across all time and space scales, including their impacts on ecosystems and coastal communities. We welcome studies on inter-basin exchanges, decadal predictability, and the ecological or biogeochemical consequences of these physical processes. Submissions from researchers involved in international programs and field campaigns like SOLAS, IIOE-2, IndOOS, IODP, and EKAMSAT are encouraged.
Co-Sponsor(s):
Index Terms:
1615 Biogeochemical cycles, processes, and modeling [GLOBAL CHANGE]
1616 Climate variability [GLOBAL CHANGE]
4504 Air/sea interactions [OCEANOGRAPHY: PHYSICAL]
Student/Early Career Chair: Ankitha Kannad, University of California San Diego, Scripps Institution of Oceanography, La Jolla, United States
Primary Chair: Zouhair Lachkar, New York University Abu Dhabi, Mubadala Arabian Center for Climate and Environmental Sciences (ACCESS), Abu Dhabi, United Arab Emirates
Co-chairs: Dennis Booge, GEOMAR Helmholtz Centre for Ocean Research Kiel, Marine Biogeochemistry, Kiel, Germany, Tanya Marshall, Princeton University, Geosciences, Princeton, United States and Conrad Luecke, Naval Research Laboratory, Stennis Space Center, United States; U.S. Naval Research Laboratory, United States
Against the Trend: Stable OMZ in the Eastern Arabian Sea Despite Warming and Stratification (1860223)
Dr Sudheesh Valliyodan, Central University of Kerala, Kasaragod, India, Smitha B R, Centre for Marine Living Resources and Ecology, Ministry of Earth Sciences, Kochi, India and Vishnu Narayanan Nampoothiri S, National Centre for Polar and Ocean Research, Goa, India
Climate-Relevant Trace Gas Emissions from the Eastern Tropical Indian Ocean (2012641)
Damian Leonardo Arévalo Martínez1, Marcel Sommer2, Paula Eisnecker3, Rena Czeschel Czeschel4, Gesa Schulz5, Ina Stoltenberg2 and Hermann Bange2, (1)Leibniz Institute for Baltic Sea Research Warnemünde, Marine Chemistry, Rostock, Germany, (2)GEOMAR Helmholtz Centre for Ocean Research Kiel, Chemical Oceanography, Kiel, Germany, (3)University of the Azores, Azores, Portugal, (4)GEOMAR Helmholtz Centre for Ocean Research Kiel, Physical Oceanography, Kiel, Germany, (5)University of Hamburg, Hamburg, Germany
Influence of Tropical Climate Modes on Seasonal and Spatial Variability of Phytoplankton Size Structure Around Sri Lanka (2016877)
Thivin Abeywickrama1, Gayan Pathirana1, Heshani Werellapatha1, Sudheera Gunasekara2, Kyung-Min Noh3 and Dongxiao Wang4, (1)University of Ruhuna, Oceanography and Marine Geology, Matara, Sri Lanka, (2)National Aquatic Resources Research and Development Agency, Oceanography Division, Colombo, Sri Lanka, (3)NOAA GFDL, Princeton, United States, (4)Sun Yat-Sen University, School of Marine Sciences, Guangzhou, China
Asymmetric Responses of Tropical Indian Ocean Rainfall Variability to the Indian Ocean Dipole (2016916)
Heshani Werellapatha1, Gayan Pathirana1, Thivin Abeywickrama1, Aoyun Xue2, Dongxiao Wang3 and Upul Premarathne1, (1)University of Ruhuna, Oceanography and Marine Geology, Matara, Sri Lanka, (2)University of California Santa Barbara, Bren School of Environmental Science and Management, Santa Barbara, CA, United States, (3)Sun Yat-Sen University, School of Marine Sciences, Guangzhou, China
Local and remote climatic drivers of extreme summer temperatures in the Arabian Gulf (2017181)
Zouhair Lachkar1, Olivier Pauluis2, Francesco Paparella1, Basit Khan3 and John Burt3, (1)New York University Abu Dhabi, Mubadala Arabian Center for Climate and Environmental Sciences (ACCESS), Abu Dhabi, United Arab Emirates, (2)New York University, Courant Institute of Mathematical Science, New York, NY, United States, (3)New York University Abu Dhabi, Mubadala Arabian Center for Climate and Environmental Sciences, Abu Dhabi, United Arab Emirates
Chlorophyll-a Bloom Phenology in the Southwest Indian Ocean: Mean State, Seasonal Cycles and Interannual Variability through Satellite Data (2018152)
Aline Arens, Laboratoire d'Océanographie Physique et Spatiale (LOPS), University of Brest, CNRS, Ifremer, IRD, IUEM, Plouzané, France, Pierrick Penven, Laboratoire d’Océanographie Physique et Spatiale (LOPS), University of Brest, CNRS, Ifremer, IRD, IUEM, Plouzané, France, Fanny Chenillat, Actimar, Brest, France, Stéphane Pous, LOCEAN, Paris Cedex 05, France, Fialho Nehama, Escola Superior de Ciencias Marinhas e Costeiras (ESCMC), Quelimane, Mozambique and Bernardino S Malauene, Instituto Oceanográfico de Moçambique (InOM), Maputo, Mozambique
Cross-basin Influence of Intraseasonal Sea Surface Temperature Anomalies in the Arabian Sea on Precipitation over the Bay of Bengal during Summer Monsoon (2019286)
Jingyuan Xi1, Lei Zhou2, Xiaojing Li1, Baosheng Li3 and Jianhuang Qin4, (1)Second Institute of Oceanography, Ministry of Natural Resources, State Key Laboratory of Satellite Ocean Environment Dynamics, Hangzhou, China, (2)Shanghai Jiao Tong University, School of Oceanography, Shanghai, China, (3)Sun Yat-Sen University, School of Marine Sciences, Guangzhou, China, (4)Hohai University, College of Oceanography, Nanjing, China
Stoichiometric balance of nutrients drives seasonal shifts in particulate organic C:N:P ratios in the northern Indian Ocean (2024208)
Abul Qasim1, Deepika Sahoo1,2 and Arvind Singh1, (1)Physical Research Laboratory, Geosciences Division, Ahmedabad, India, (2)University of Montana, Flathead Lake Biological Station, Polson, United States
Linking Surface Forcing to Interior Mixing in the Bay of Bengal (2028848)
Kerstin Astrid Bergentz1, Jennifer A MacKinnon2, Drew J. Lucas2, Devon M Northcott3 and Filipe Pereira4, (1)Scripps Institution of Oceanography, La Jolla, United States, (2)University of California San Diego, Scripps Institution of Oceanography, La Jolla, United States, (3)University of California San Diego, Scripps Institution of Oceanography, San Diego, United States, (4)University of Caliornia San Diego, Scripps Institution of Oceanography, San Diego, United States
Monsoon-driven changes in marine productivity and carbon burial in the Bay of Bengal from the last glaciation to present warming (2030024)
Mohd Salman, National Institute of Oceanography, School of Earth, Ocean, and Atmospheric Sciences Goa University, Goa, India and Rajeev Saraswat, CSIR-National Institute of Oceanography, Geological Oceanography Division, Panjim, India
Impact of Tropical Cyclone Formation on Summer Monsoon Onset (2030247)
Selina Bolella1, Devmi Gamage2, Jayesh Phadtare1 and Harindra J.S. Fernando1, (1)University of Notre Dame, Department of Civil and Environmental Engineering and Earth Sciences, Notre Dame, United States, (2)University of Notre Dame, Department of Civil and Environmental Engineering and Earth Sciences, Notre Dame, IN, United States
Impacts of Salinity Stratification and COARE wave-based formulation on SST and Air-sea fluxes within the Indian Ocean mini-warm pool (2030278)
Siddhant Kerhalkar, University of Massachusetts Dartmouth, School for Marine Sciences and Technology, New Bedford, United States, Hyodae Seo, University of Hawaii at Manoa, Honolulu, United States, Amit Tandon, University of Massachusetts Dartmouth, School for Marine Science and Technology, New Bedford, United States and Jennifer A MacKinnon, University of California San Diego, Scripps Institution of Oceanography, La Jolla, United States
Atmospheric and Oceanic Drivers of Submesoscale Heat and Momentum Fluxes in the Bay of Bengal During the Monsoon Transition (2030340)
Debarshi Sarkar, University of Massachusetts Dartmouth, Engineering and Applied Science, North Dartmouth, United States, Amit Tandon, University of Massachusetts Dartmouth, School for Marine Science and Technology, New Bedford, United States, J. Thomas Farrar, Woods Hole Oceanographic Inst, Physical Oceanography, Woods Hole, United States and Luc Lenain, University of California San Diego, Scripps Institution of Oceanography, La Jolla, United States
Assessing Anthropogenic Carbon Through Stable Carbon Isotope Distribution of Dissolved Inorganic Carbon in the Western Equatorial and Subtropical Indian Ocean (2032059)
Jisoon Lee1, Sang-Hwa Choi2, Keyhong Park3, TaeKeun Rho4, Dong-Jin Kang5 and Doshik Hahm1, (1)Department of Oceanography, Pusan National University, Pusan, South Korea, (2)Korea Institute of Ocean Science & Technology, Marine Environmental Research Department, Busan, South Korea, (3)KOPRI Korea Polar Research Institute, Incheon, Korea, Republic of (South), (4)Korea Institute of Ocean Science and Technology, Marine Environment Research Department, Busan, South Korea, (5)Korea Institute of Ocean Science & Technology, KIOST School and Academic Programs Division, Busan, South Korea
Subsurface Cooling, Freshening, and Circulation Changes in the South Indian Ocean from Repeat Hydrography and Argo Observations (2032608)
Meng Han, University of Tasmania, Institute for Marine and Antarctic Studies, Hobart, TAS, Australia, Helen Elizabeth Phillips, Institute for Marine and Antarctic Studies, University of Tasmania, Hobart, TAS, Australia, Nathaniel L. Bindoff, Univ Tasmania, Hobart, TAS, Australia, Ming Feng, CSIRO, Environment, Crawley, Western Australia, Australia and Ramkrushnbhai Patel, Australian Research Council Centre of Excellence for Climate Extremes, University of Tasmania, Hobart, TAS, Australia
The Influence of Monsoon Variability on the Circulation of the Near-surface Indian Ocean (2033013)
Marufa Ishaque1, Michael S Dinniman2 and Dr. John Michael Klinck II, PhD2, (1)Old Dominion University, Norfolk, VA, United States, (2)Old Dominion University, Center for Coastal Physical Oceanography, Norfolk, VA, United States
Understanding Future Changes of Chlorophyll-a in the Indian Ocean Using CMIP6 Earth System Model Simulations (2033212)
Athira K, KUFOS-INCOIS Joint Research Centre, Kerala University of Fisheries and Ocean Studies, Kochi, India, Prasanna Kanti Ghoshal, Indian National Center for Ocean Information Services, Oceam Modeling, Hyderabad, India, Apurva P Joshi, Indian National Center for Ocean Information Services, Ocean Modeling, Hyderabad, India, Linta Rose, University of Hawaii at Manoa, Honolulu, United States and Kunal Chakraborty, Indian National Centre for Ocean Information Services, Hyderabad, India
Stratification and Wind Changes Shape Future Indian Ocean summer chlorophyll (2033627)
Kwatra Sadhvi1, Matthieu Lengaigne2, Iyyappan Suresh1, Cyril Dutheil3 and Jérome Vialard4, (1)Digital University Kerala, School of Informatics, Trivandrum, India, (2)MARBEC, University of Montpellier, CNRS, IFREMER, IRD, Sète, France, (3)IRD, Sète, France, (4)LOCEAN-IPSL, CNRS-IRD-MNHN-Sorbonne Université, Paris, France
The Role of Rossby-Wave Induced Subsidence in Developing Layered Mid-Tropospheric Dry Intrusion Over the Arabian-Sea: Observations and Diagnostics (2037537)
Devmi Gamage1, Selina Bolella2, Griffin Modjeski3, Jayesh Phadtare2 and Harindra Joseph Fernando1, (1)University of Notre Dame, Department of Civil and Environmental Engineering and Earth Sciences, Notre Dame, IN, United States, (2)University of Notre Dame, Department of Civil and Environmental Engineering and Earth Sciences, Notre Dame, United States, (3)University of Notre Dame, Notre Dame, United States
Remote Sensing estimation of Particulate Organic Nitrogen (PON): Empirical algorithms and multi-sensor based approaches in the Indian coastal water (2038045)
Kandasamy Priyanka, Space Applications Centre SAC-ISRO, Ahmedabad,India, Ahmedabad, India, Dr. Ranjit Kumar Sarangi, MSc PhD, ISRO, Ahmedabad, India and Bimal Kumar Bhattacharya, Indian Space Research Organization- Space Applications Center, Ahemadabad, India
Multi-year subsurface mixing properties and air-sea interaction in the Arabian Sea Warm Pool (2039403)
Jonathan Andrew Christophersen1, Sue Chen2, Conrad Luecke3, Hemantha W Wijesekera4, Qingfang Jiang5, Jerome Schmidt5, Tommy G Jensen6 and Ewa Jarosz7, (1)US Naval Research Laboratory, Monterey, United States, (2)Naval Research Laboratory, Monterey, CA, United States, (3)Naval Research Laboratory, Stennis Space Center, United States, (4)Naval Research Laboratory, Ocean Sciences, Stennis Space Center, MS, United States, (5)Naval Research Lab Monterey, Monterey, CA, United States, (6)Naval Research Laboratory, Ocean Sciences Division, Stennis Space Center, MS, United States, (7)Naval Research Lab Stennis Space Center, Stennis Space Center, MS, United States
Sub-Mesoscale Ocean dynamics in the Northern Arabian Sea using Ocean Color Monitor onboard EOS-06 and Surface Water and Ocean Topography (SWOT) Mission (2040643)
Amit Tandon1, Neeraj Agarwal2, Aditya Choudhary3, Jishad M.3, Rashmi Sharma2, Abhishek Chakraborty3 and Aditya Choudhary, (1)University of Massachusetts Dartmouth, School for Marine Science and Technology, New Bedford, United States, (2)Indian Space Research Organization, Space Applications Centre, Ahmedabad, India, (3)Indian Space Research Organization, Space Applications Centre, Ahemadabad, India
Warming-induced shifts in the mean state of the Arabian Sea Surface Chlorophyll (2041057)
Sathsarani Hewage1, Gayan Pathirana1, Rmgn Thilakarathne1, Kyung-Min Noh2 and Dongxiao Wang3, (1)University of Ruhuna, Oceanography and Marine Geology, Matara, Sri Lanka, (2)NOAA GFDL, Princeton, United States, (3)Sun Yat-Sen University, School of Marine Sciences, Guangzhou, China
Near Inertial Chlorophyll Response to Atmospheric Forcing: A Case Study in the Bay of Bengal (2041728)
Filipe Pereira1, Kerstin Astrid Bergentz2, Jennifer A MacKinnon3, Devon M Northcott4, Pratika Singh5, Drew J. Lucas3, J. Thomas Farrar6 and Bhaskar Parli7, (1)University of Caliornia San Diego, Scripps Institution of Oceanography, San Diego, United States, (2)Scripps Institution of Oceanography, La Jolla, United States, (3)University of California San Diego, Scripps Institution of Oceanography, La Jolla, United States, (4)University of California San Diego, Scripps Institution of Oceanography, San Diego, United States, (5)NATIONAL CENTRE FOR POLAR AND OCEAN RESEARCH, POLAR SCIENCE GROUP, Vasco DA Gama, India, (6)Woods Hole Oceanographic Inst, Physical Oceanography, Woods Hole, United States, (7)National Centre for Polar and Ocean Research, Ministry of Earth Sciences, Vasco da Gama, India
Air-Sea Coupling during the Onset of Summer Monsoon in the Arabian Sea (2049054)
Sue Chen, Naval Research Lab Monterey, Marine Meteorology, Monterey, CA, United States, Conrad Luecke, Naval Research Laboratory, Stennis Space Center, United States, Jerome Schmidt, Naval Research Lab Monterey, Monterey, CA, United States, Hemantha W Wijesekera, Naval Research Laboratory, Ocean Sciences, Stennis Space Center, MS, United States, Jonathan Andrew Christophersen, U.S. Naval Research Laboratory, Marine Meteorology Division, Monterey, United States and Ewa Jarosz, Naval Research Lab Stennis Space Center, Stennis Space Center, MS, United States
