Hari Vishnu

Acoustics & Climate Science Researcher at @arlnus. Chief Editor,@earthzine. Ex-Visiting at Scripps. ECOP member of @OceanDecadeECOP. Posts reflect my own views

[Hari Vishnu @harivn]

Excited to announce our latest paper: we’ve shown that the sounds produced by melting glaciers are quantitatively linked to their melt activity, conclusively, for the first time! 🔊🧊
https://t.co/L6BTRYINLy
#Glaciology #Acoustics (1/4)

[Hari Vishnu @harivn]

I continue to advocate for acoustics as a versatile tool—for marine mammals, reefs, fishes and much more. With Distributed Acoustic Sensing extending its reach, I believe acoustics can become truly mainstream for these applications.
(4/4)

[Hari Vishnu @harivn]

Seeing research make real-world impact in products/action/policy is very rewarding. So it was heartening to see my work on acoustic marine-mammal biodiversity characterization in Singapore used to inform policy—converting Sisters, Lazarus–Kusu islands to Marine Parks.
(1/4)

[Hari Vishnu @harivn]

Regions with high activity levels were eventually determined to be biodiversity hotspots. For technical details: https://t.co/p4r5MSe8hV . This work is ongoing, we’ve learned a great deal, and there’s more to uncover as we mine our datasets and refine our interpretations.
(3/4)

[arXiv Sound @ArxivSound]

Hari Vishnu, Yuen Min Too, Mandar Chitre, Danwei Huang, Teong Beng Koay, Sudhanshi S. Jain, "Passive Acoustic Monitoring of Noisy Coral Reefs," https://t.co/OPRzgGGr4D

[Hari Vishnu @harivn]

You can also read the pdf shared here: https://t.co/JfSvRONQzL (3/3)

[Hari Vishnu @harivn]

Over the last few years we explored #robotics to monitor remote glacial termini and complement our acoustic studies. Introducing Glacial Ablation Monitoring Robot (GLAMOR), a surface vehicle to operate in the hazardous region near #glacier termini https://t.co/ykGwqjFlLd (1/3)

[Hari Vishnu @harivn]

This region is poorly studied due to calving hazards. In 2023, GLAMOR collected #thermohaline+#acoustics+video data right next to the #glacier wall—likely amongst the 1st close direct surveys of this zone. These studies enhance our understanding of ablation processes (2/3)

[Oskar Głowacki @oscar_snoopy]

PhD opportunity

[Hari Vishnu @harivn]

This is a big step toward using acoustic monitoring for large-scale, long-term tracking of glacier melt—helping us understand ice losses around the world. 🌎🔉 (4/4)

#ClimateScience #Cryosphere #Arctic #Polar #PassiveAcoustics

[Hari Vishnu @harivn]

Excited to announce our latest paper: we’ve shown that the sounds produced by melting glaciers are quantitatively linked to their melt activity, conclusively, for the first time! 🔊🧊
https://t.co/L6BTRYINLy
#Glaciology #Acoustics (1/4)

[Hari Vishnu @harivn]

To tackle this, we created a physics-based model to explain how the sound varies across the glacial bay! The result? We can estimate how much sound melting glaciers produce, & link this to what drives melt (water temperature) & its outcome (how fast the glaciers retreat). (3/4)

[sauvc @sauvcsg]

The competition is bigger than ever! 🌍 With participants from 14 different countries, it's an exciting global showdown. We can't wait to meet all the passionate and innovative student minds!

Countdown to #sauvc2025 #marinerobotics

[Hari Vishnu @harivn]

@oscar_snoopy Excellent news, Oskar! 👏

[sauvc @sauvcsg]

Deadline for Marine Robotics Workshop is quickly approaching! Sec school students eager to explore autonomous 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!

[Hari Vishnu @harivn]

@BayQuest_sf Thank you!

[Hari Vishnu @harivn]

Thrilled to announce my recent published work on polar monitoring using comp vision at IEEE OCEANS, a culmination of 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 (1/2)

[Hari Vishnu @harivn]

Our findings can help understand ice dynamics, complement our ongoing study on acoustic monitoring at glaciers, & may also pave the way for real-time analysis of glacial changes. Paper available here, or can be downloaded from my webpage: https://t.co/Kb0udnPOE1 (2/2)

[sauvc @sauvcsg]

Secondary School Students!Join the Marine Robotics Workshop—a hands-on event focused on ocean sustainability and robotics, endorsed by the UN ‘the Ocean Decade’!Organized by SP Polytechnic & NUS, along with SAUVC.
Registrations are open https://t.co/JWKT18bBLu
@UNOceanDecade