Dr. Hari Vishnu
@harivn.bsky.social
Acoustics & Climate Science Researcher at Acoustic Research Laboratory, Singapore. Chief Editor, IEEE Earthzine. Ex-Visiting at Scripps. Member of OceanDecade ECOP. Posts reflect my own views.
Active acoustics for #polar #glacier science — now in print! ❄️🔊
A new open‑access paper I collaborated on, shows how high‑frequency broadband echosounders illuminate key #climatechange processes at #tidewater #glaciers.
Read: doi.org/10.5194/tc-1...
(1/3)
A new open‑access paper I collaborated on, shows how high‑frequency broadband echosounders illuminate key #climatechange processes at #tidewater #glaciers.
Read: doi.org/10.5194/tc-1...
(1/3)
High-frequency broadband active acoustic systems as a tool for high-latitude glacial fjord research
Abstract. High-frequency broadband scientific echosounders enable the monitoring of complex dynamics, via the rapid collection of high-resolution, near-synoptic observations of the water column and qu...
doi.org
October 24, 2025 at 2:31 PM
Active acoustics for #polar #glacier science — now in print! ❄️🔊
A new open‑access paper I collaborated on, shows how high‑frequency broadband echosounders illuminate key #climatechange processes at #tidewater #glaciers.
Read: doi.org/10.5194/tc-1...
(1/3)
A new open‑access paper I collaborated on, shows how high‑frequency broadband echosounders illuminate key #climatechange processes at #tidewater #glaciers.
Read: doi.org/10.5194/tc-1...
(1/3)
Asia's largest underwater robo competition,Singapore AUV Challenge (#SAUVC) 2026 edition will be held in Sanya,China,May 28-31.Co-sponsored by IEEE+Harbin univ., it is preceded by the OCEANS conf, making it a fantastic opportunity to engage with a wider robotics community. Mark your calendars! (1/2)
October 10, 2025 at 3:28 PM
Asia's largest underwater robo competition,Singapore AUV Challenge (#SAUVC) 2026 edition will be held in Sanya,China,May 28-31.Co-sponsored by IEEE+Harbin univ., it is preceded by the OCEANS conf, making it a fantastic opportunity to engage with a wider robotics community. Mark your calendars! (1/2)
Humans locate their positions using what we see, all the time, right? Can we get robots to do this, especially underwater,where sensor errors limit how accurately we can locate ourselves? We recently published how to estimate robot location (Pose) from Camera Images at (1/2) doi.org/10.1109/JOE....
Pose Estimation From Camera Images for Underwater Inspection
High-accuracy localization is essential for underwater reinspection missions, which often require revisiting sites with complex structures for inspection and maintenance. Traditional localization syst...
doi.org
September 15, 2025 at 3:09 AM
Humans locate their positions using what we see, all the time, right? Can we get robots to do this, especially underwater,where sensor errors limit how accurately we can locate ourselves? We recently published how to estimate robot location (Pose) from Camera Images at (1/2) doi.org/10.1109/JOE....
Over the last few years we've explored #robotics to monitor remote glacial termini, to complement our passive acoustic monitoring work. Introducing Glacial Ablation Monitoring Robot (GLAMOR), a surface vehicle to operate in the hazardous region near #glacier termini doi.org/10.1109/OCEA...
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A Low-Cost Surface Vehicle for Studying the Near-Terminus Region at Tidewater Glaciers
The terminus region of tidewater glaciers is under-explored, yet the processes occurring there are critical to our understanding and assessment of climate-change-induced ice loss, thermohaline structu...
doi.org
August 27, 2025 at 2:07 AM
Over the last few years we've explored #robotics to monitor remote glacial termini, to complement our passive acoustic monitoring work. Introducing Glacial Ablation Monitoring Robot (GLAMOR), a surface vehicle to operate in the hazardous region near #glacier termini doi.org/10.1109/OCEA...
(1/2)
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🔊Recently in Halifax,I presented a passive-acoustic monitoring s/m developed by us to track #biodiversity in #Singapore waters, focusing on #bioacoustics of #marinemammals like #dolphins. This cloud-enabled system detects calls, finds direction, captures camera shots...(1/3): doi.org/10.1109/OCEA...
Cloud-Enabled Passive Acoustic Monitoring Array for Real-Time Detection of Marine Mammals
Passive acoustics is an effective, robust, non-invasive technique to detect and monitor vocalizing marine mammals. The tropical waters around Singapore are visited or inhabited by several species of m...
doi.org
July 24, 2025 at 3:45 AM
🔊Recently in Halifax,I presented a passive-acoustic monitoring s/m developed by us to track #biodiversity in #Singapore waters, focusing on #bioacoustics of #marinemammals like #dolphins. This cloud-enabled system detects calls, finds direction, captures camera shots...(1/3): doi.org/10.1109/OCEA...
Excited to announce our latest paper: we’ve shown that the sounds produced by melting glaciers are quantitatively linked to their melt activity for the first time! 🔊🧊
doi.org/10.1017/jog....
#Glaciology #Acoustics (1/4)
doi.org/10.1017/jog....
#Glaciology #Acoustics (1/4)
Acoustic activity indicates submarine melt at tidewater glaciers | Journal of Glaciology | Cambridge Core
Acoustic activity indicates submarine melt at tidewater glaciers - Volume 71
doi.org
July 11, 2025 at 3:39 PM
Excited to announce our latest paper: we’ve shown that the sounds produced by melting glaciers are quantitatively linked to their melt activity for the first time! 🔊🧊
doi.org/10.1017/jog....
#Glaciology #Acoustics (1/4)
doi.org/10.1017/jog....
#Glaciology #Acoustics (1/4)
Excited to share my feature in an IEEE TryEngineering video on Ocean Engineering heroes! 🌊 I discuss ocean sensing research, focusing on polar regions through acoustics, computer vision & robotics. 📸 Catch campaign photos at 3:30 & 5:30! Watch it here: tryengineering.org/explore-reso... (1/3)
Ocean Engineering
TryEngineering, an initiative from IEEE, aims to provide educational resources, inspiration, and guidance for educators and students to entice young people to enter the field of engineering.
tryengineering.org
April 20, 2025 at 11:49 AM
Excited to share my feature in an IEEE TryEngineering video on Ocean Engineering heroes! 🌊 I discuss ocean sensing research, focusing on polar regions through acoustics, computer vision & robotics. 📸 Catch campaign photos at 3:30 & 5:30! Watch it here: tryengineering.org/explore-reso... (1/3)
The largest student underwater competition, Singapore AUV challenge, is now bigger than ever! 🌍 With 400+ participants from ~14 countries, it's an exciting global showdown. We can't wait to meet all the passionate student minds! Coming up 14-17 Mar.
Countdown to #sauvc2025 #marinerobotics #robotics
Countdown to #sauvc2025 #marinerobotics #robotics
March 6, 2025 at 1:32 AM
The largest student underwater competition, Singapore AUV challenge, is now bigger than ever! 🌍 With 400+ participants from ~14 countries, it's an exciting global showdown. We can't wait to meet all the passionate student minds! Coming up 14-17 Mar.
Countdown to #sauvc2025 #marinerobotics #robotics
Countdown to #sauvc2025 #marinerobotics #robotics
Excited! Singapore AUV Challenge (sauvc.org), the fun marine robotics event to watch out for in 2025,coming in 2 weeks!Happy to be chairing this edition.The event has evolved this year with a more fun qualifier round,more teams (upto 42!), more tasks+variety, & more countries in the fray now ! (1/2)
March 1, 2025 at 6:23 AM
Excited! Singapore AUV Challenge (sauvc.org), the fun marine robotics event to watch out for in 2025,coming in 2 weeks!Happy to be chairing this edition.The event has evolved this year with a more fun qualifier round,more teams (upto 42!), more tasks+variety, & more countries in the fray now ! (1/2)
I'm organizing a Marine Robotics Workshop in March.The reg deadline is approaching!Sec school students eager to explore #marine robots & #ocean conservation,gather your teams& register now.Don't miss this opportunity to learn from SG's top underwater #robotics experts and build your very own robots!
January 29, 2025 at 2:33 AM
I'm organizing a Marine Robotics Workshop in March.The reg deadline is approaching!Sec school students eager to explore #marine robots & #ocean conservation,gather your teams& register now.Don't miss this opportunity to learn from SG's top underwater #robotics experts and build your very own robots!
Thrilled to announce my recently published work on polar monitoring using computer vision at IEEE OCEANS, a culmination of some fieldwork in Svalbard last year.It focuses on estimation of floating ice distribution in glacial bays using aerial imagery by fine-tuning+robustifying a SAM model. (1/2)
January 12, 2025 at 2:54 PM
Thrilled to announce my recently published work on polar monitoring using computer vision at IEEE OCEANS, a culmination of some fieldwork in Svalbard last year.It focuses on estimation of floating ice distribution in glacial bays using aerial imagery by fine-tuning+robustifying a SAM model. (1/2)
Reposted by Dr. Hari Vishnu
While climate COPs get much of the spotlight, the biodiversity COP is equally critical—and gaining momentum fast.
This week, COP16 in Colombia brings countries together to advance the Global Biodiversity Framework goal of protecting 30% of our planet’s land and water by 2030.
Read more:
This week, COP16 in Colombia brings countries together to advance the Global Biodiversity Framework goal of protecting 30% of our planet’s land and water by 2030.
Read more:
COP16: What’s at Stake for the 2024 UN Biodiversity Conference
This October, the race to protect Earth’s biodiversity is front and center as representatives from countries around the world gather in Colombia for the UN Biodiversity Conference, COP16. Here’s what’...
www.nature.org
October 28, 2024 at 3:37 PM
While climate COPs get much of the spotlight, the biodiversity COP is equally critical—and gaining momentum fast.
This week, COP16 in Colombia brings countries together to advance the Global Biodiversity Framework goal of protecting 30% of our planet’s land and water by 2030.
Read more:
This week, COP16 in Colombia brings countries together to advance the Global Biodiversity Framework goal of protecting 30% of our planet’s land and water by 2030.
Read more:
Reposted by Dr. Hari Vishnu
Excitement building up for SAUVC, the robotics competition to watch out for in 2024! We have more teams & participants than ever before, slated for this edition This one promises to hold more treats for participants & viewers alike. A bonus round will happen at the TCOMS Ocean Basin facility. (1/2)
March 18, 2024 at 8:12 AM
Excitement building up for SAUVC, the robotics competition to watch out for in 2024! We have more teams & participants than ever before, slated for this edition This one promises to hold more treats for participants & viewers alike. A bonus round will happen at the TCOMS Ocean Basin facility. (1/2)
The UN #OceanDecade has been going strong for 3+ years, becoming the largest global #oceanscience initiative ever! Its time to take stock of where we are & what the challenges/gaps are. I was honored to moderate a panel at the OCEANS conference in Halifax recently to discuss these issues. (1/2)
October 13, 2024 at 8:34 AM
The UN #OceanDecade has been going strong for 3+ years, becoming the largest global #oceanscience initiative ever! Its time to take stock of where we are & what the challenges/gaps are. I was honored to moderate a panel at the OCEANS conference in Halifax recently to discuss these issues. (1/2)
October 9, 2024 at 3:14 AM
Detecting #marinemammal vocalizations underwater in Singapore's waters is challenging because of the #bioacoustics activity from the snapping shrimp in this region. My latest paper discusses how this can be done using smart denoising techniques to suppress the noise. doi.org/10.1016/j.ma... (1/2)
Redirecting
doi.org
October 6, 2024 at 3:06 PM
Detecting #marinemammal vocalizations underwater in Singapore's waters is challenging because of the #bioacoustics activity from the snapping shrimp in this region. My latest paper discusses how this can be done using smart denoising techniques to suppress the noise. doi.org/10.1016/j.ma... (1/2)
Last year,we explored marine robots to study glaciers in the Arctic.We started with a low-cost robot to test the waters (or the ice!) in these glacial fjords. Now we have some Polish TV coverage with our "Glacial Ablation MOnitoring Robot" (GLAMOR): vod.tvp.pl/programy,88/... (1/2)
Stacja Arktyka: Robot na lodowcu - programy, Oglądaj na TVP VOD
Najwięcej badań wykonywanych jest przy pomocy specjalnych urządzeń i robotów. Bez nich dokonywanie pomiarów wody oraz lodowców byłaby niemożliwa.
vod.tvp.pl
October 3, 2024 at 9:32 PM
Last year,we explored marine robots to study glaciers in the Arctic.We started with a low-cost robot to test the waters (or the ice!) in these glacial fjords. Now we have some Polish TV coverage with our "Glacial Ablation MOnitoring Robot" (GLAMOR): vod.tvp.pl/programy,88/... (1/2)
Excitement building up for SAUVC, the robotics competition to watch out for in 2024! We have more teams & participants than ever before, slated for this edition This one promises to hold more treats for participants & viewers alike. A bonus round will happen at the TCOMS Ocean Basin facility. (1/2)
March 18, 2024 at 8:12 AM
Excitement building up for SAUVC, the robotics competition to watch out for in 2024! We have more teams & participants than ever before, slated for this edition This one promises to hold more treats for participants & viewers alike. A bonus round will happen at the TCOMS Ocean Basin facility. (1/2)
Just after my Antarctic return, I'm in for a bonus. My research on studying glaciers in the Arctic using acoustics and robotics, have been covered by national news
Straits Times ! Proud moment indeed to be featured for my work. Watch out for the robo pic!
www.straitstimes.com/singapore/am...
Straits Times ! Proud moment indeed to be featured for my work. Watch out for the robo pic!
www.straitstimes.com/singapore/am...
March 18, 2024 at 8:08 AM
Just after my Antarctic return, I'm in for a bonus. My research on studying glaciers in the Arctic using acoustics and robotics, have been covered by national news
Straits Times ! Proud moment indeed to be featured for my work. Watch out for the robo pic!
www.straitstimes.com/singapore/am...
Straits Times ! Proud moment indeed to be featured for my work. Watch out for the robo pic!
www.straitstimes.com/singapore/am...
So, I successfully completed my maiden 11-day expedition to the Antarctic thanks to Nat Geo & Lindblad expeditions ! Didn't expect I'd be able to learn so much, get so much data, on our first voyage here.Stunning views,great outings & unique biodiversity added to my experience (1/2)
February 14, 2024 at 1:13 PM
So, I successfully completed my maiden 11-day expedition to the Antarctic thanks to Nat Geo & Lindblad expeditions ! Didn't expect I'd be able to learn so much, get so much data, on our first voyage here.Stunning views,great outings & unique biodiversity added to my experience (1/2)
Last July, I undertook a field campaign to the Arctic to study the music of the melting glaciers, and how we can use it to understand how fast they are melting. It was a satisfying campaign, and gave us a lot of insights into the physical processes in this relatively unexplored region.(1/3)
January 15, 2024 at 8:21 AM
Last July, I undertook a field campaign to the Arctic to study the music of the melting glaciers, and how we can use it to understand how fast they are melting. It was a satisfying campaign, and gave us a lot of insights into the physical processes in this relatively unexplored region.(1/3)