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NASA study finds evidence that IMO 2020 sulphur cap reduced air pollution from shipping

Researchers concluded the global fuel regulation played the dominant role in reducing ship tracks in 2020; pandemic-related disruptions played a secondary role.
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The IMO 2020 sulphur cap has reduced artificial “ship track” clouds to record-low levels in 2020, reveals a new study conducted by the National Aeronautics and Space Administration (NASA) which it announced on Wednesday (19 October). 

NASA explained ship tracks, the polluted marine clouds that trail ocean-crossing vessels, are a signature of modern trade. 

“Like ghostly fingerprints, they trace shipping lanes around the globe, from the North Pacific to the Mediterranean Sea. But in 2020, satellite observations showed fewer of those pollution fingerprints,” it said. 

Drawing on nearly two decades of satellite imagery, researchers found that the number of ship tracks fell significantly after a new fuel regulation went into effect. 

“A global standard implemented in 2020 by the International Maritime Organization (IMO) – requiring an 86% reduction in fuel sulfur content – likely reduced ship track formation. COVID-19-related trade disruptions also played a small role in the reduction,” NASA added. 

Scientists used advanced computing techniques to create the first global climatology (a history of measurements) of ship tracks. They used artificial intelligence to automatically identify ship tracks across 17 years of daytime images (2003-2020) captured by NASA’s Moderate Resolution Imaging Spectroradiometer (MODIS) aboard the Aqua satellite.

“Without this kind of complete and large-scale sampling of ship tracks, we cannot begin to completely understand this problem,” said lead author Tianle Yuan, an atmospheric scientist at NASA’s Goddard Space Flight Center in Greenbelt, Maryland, and the University of Maryland, Baltimore County.

Ship tracks were first observed as “anomalous cloud lines” in early weather satellite images acquired in the 1960s. They are formed by water vapor coalescing around small particles of pollution (aerosols) in ship exhaust. The highly concentrated droplets scatter more light and therefore appear brighter than non-polluted marine clouds, which are seeded by larger particles such as sea salt.

“By capping fuel sulfur content at 0.5% (down from 3.5%), IMO’s global regulation in 2020 changed the chemical and physical composition of ship exhaust. Less sulfur emissions mean there are fewer of the aerosol particles released to form detectable ship tracks,” NASA said. 

According to the Yuan and colleagues, similar but regionally defined sulfur regulations – such as an IMO Emission Control Area in effect since 2015 off the west coast of the U.S. and Canada – had not had the desired effect because operators altered their routes and charted longer courses to avoid designated zones.

While analysing 2020 data, the researchers found that ship-track density fell that year in every major shipping lane. (See the map above.) Ship-based tracking data indicated that the COVID-19 pandemic played a role by decreasing global shipping traffic by 1.4% for a few months. But this change alone could not explain the large decrease in observed ship tracks, which remained at record-low levels through several months of 2021 (the most recent data analysed). 

The researchers concluded that the new global fuel regulation played the dominant role in reducing ship tracks in 2020.

 

Photo credit: NASA / NASA Earth Observatory
Published: 20 October, 2022

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Legal

Singapore withdraws remaining 127 charges against Hin Leong founder OK Lim

Lim Oon Kuin, also known as OK Lim, was issued a stern warning and a district court granted him a discharge amounting to an acquittal for these charges on 17 July.

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July 21, 2026

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RESIZED Sora Shimazaki on Pexels

Founder of collapsed oil trader Hin Leong Trading, Lim Oon Kuin, also known as OK Lim, has had the remaining 127 charges against him withdrawn, according to The Straits Times on Monday (20 July). 

OK Lim was issued a stern warning and a district court granted him a discharge amounting to an acquittal for these charges, including those for cheating, on 17 July. The discharge means Lim cannot be prosecuted again for the same offences.

Lim, 84, is currently serving a 13½-year prison sentence after the High Court reduced his original 17½-year jail term in March 2026. He was convicted in 2024 on two cheating charges and one count of abetting forgery in a case prosecutors described as one of Singapore’s most serious trade finance frauds.

Lim was convicted in May 2024 of two charges of cheating the Hongkong and Shanghai Banking Corporation (HSBC) and one count of abetting forgery that proceeded to trial out of a total of 130 criminal charges.

He was first charged in court on 14 August 2020, and was subsequently handed further charges in court on 25 September 2020, 30 April 2021 and 24 June 2021 for his role in perpetuating fraud on various financial institutions. 

A total of 130 charges were eventually brought against him for cheating and forgery-related offences.

Related: Singapore: Hin Leong Founder OK Lim gets jail term slashed to 13.5 years

 

Photo credit: Sora Shimazaki
Published: 21 July, 2026

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Winding up

Singapore: Coastal Logistics Pte Ltd to be wound up voluntarily

Coastal Logistics was reportedly affiliated with troubled Singapore bunker player Coastal Oil (Singapore) Pte Ltd.

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17 hours ago

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July 21, 2026

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RESIZED Drew Beamer

Several resolutions for Coastal Logistics Pte Ltd were made during an extraordinary general meeting held on 14 July, according to a notice in the Government Gazette on Friday (4 July).

The following resolutions were duly passed during the meeting:

As Special Resolution

  • That it has been proved to the satisfaction of the meeting that the Company cannot by reason of its liabilities continue its business and accordingly the Company be wound up voluntarily pursuant to Section 160(1)(b) of the Insolvency, Restructuring and Dissolution Act 2018 (No. 40 of 2018);

As Ordinary Resolutions

  • that Mr. Wong Pheng Cheong Martin and Ms. Koay May Yee, both care of FTI Consulting (Singapore) Pte Ltd, One Raffles Quay, #27-10 South Tower, Singapore 048583 be appointed as the joint and several Liquidators of the Company for the purpose of such winding up; and
  • that the Liquidators be at liberty to open, maintain and operate any bank account(s) or account(s) for monies received by them as Liquidators with such bank(s) as they deem fit; and
  • that a Committee of Inspection will not be formed.

Manifold Times previously reported Nicholas James Gronow, director of Heng Tong Fuels & Shipping and Coastal Logistics, filed statutory declarations for both companies stating the firms cannot continue their businesses due to liabilities.

Both companies were reportedly affiliated with troubled Singapore bunker player Coastal Oil (Singapore) Pte Ltd. 

In 2019, several vessels owned by both firms entered the sale & purchase (S&P) market in Singapore.

Related: Singapore: Director declares Heng Tong Fuels & Shipping’s inability to continue business
Related: Heng Tong Fuels & Shipping in court over DBS Bank bunker tanker loan
Related: Singapore: Bunker tanker “Coastal Neptune” arrested
Related: Heng Tong Fuels & Shipping, Coastal Logistics tankers enter S&P market

 

Photo credit: Drew Beamer
Published: 21 July, 2026

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LNG Bunkering

PIL’s LNG dual-fuel boxship “Kota Elok” arrives in Singapore on maiden call

As the first of 13 new 13,000 TEU vessels joining its fleet, Kota Elok is equipped to operate on LNG and low-sulphur fuel oil that helps reduce our greenhouse gas emissions.

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July 21, 2026

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PIL's LNG dual-fuel boxship “Kota Elok” arrives in Singapore on maiden call

Singapore-based Pacific International Lines Pte Ltd on Monday (20 July) said its first 13,000 TEU LNG dual-fuel container vessel, Kota Elok, recently made her maiden call to Singapore on 15 July.

As the first of 13 new 13,000 TEU vessels joining its fleet, Kota Elok is equipped to operate on liquefied natural gas (LNG) and low-sulphur fuel oil that helps reduce our greenhouse gas emissions. 

The vessel also incorporated energy-saving features and digital technologies to reduce fuel consumption and enhance operational performance, as well as a bow windshield to improve aerodynamics, contributing to improved fuel efficiency and lower emissions over the course of long-haul voyages.

“Following Singapore, Kota Elok will continue her voyage on our East Coast Service 1 (ES1) route to South America, calling at ports in Brazil, Uruguay, and Argentina before returning to Asia,” the company said in a social media post. 

Kota Elok also became PIL’s first vessel to receive Lloyd’s Register certification for compliance with the IACS UR E26 and UR E27 cyber security requirements.

Developed by the International Association of Classification Societies (IACS), UR E26 and UR E27 are mandatory cyber resilience requirements for newbuild vessels contracted from 1 July 2024. 

 

Photo credit: Pacific International Lines
Published: 21 July, 2026

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