Researchers have measured for the first time exactly how ship emissions affect clouds at a regional scale. The results of the research confirmed earlier computer modeling studies that predicated a sizeable cooling effect due to shipping.
For decades, scientists have theorized that the long, thin cloud patterns referred to as “ship tracks” resulting from the small airborne particles emitted by ships might alter climate by affecting the amount of sunlight reaching the earth’s surface. A team lead by the University of Washington atmospheric scientist Michael Diamond and colleagues examined more than a decade of cloud patterns over a busy shipping lane in the southeast Atlantic that connects Europe to southern Africa and Asia.
The team measured the cloud properties inside the shipping corridor using satellite data and compared them to what they estimated the values would be without shipping activity. The scientists found that the shipping activity increased the number of cloud droplets over the shipping lane that in turn prevented about 2 Watts of solar energy from reaching each square meter of ocean surface along the shipping lane.
“If you look at a satellite image of a high-traffic shipping area when the weather conditions are right, you can clearly see bright lines of clouds right along where those ships are traveling and emitting aerosols,” said Diamond. “Ship tracks are a prime example of how tiny particles of pollution in the atmosphere can influence cloud properties. The clearly visible ship tracks are only the tip of the iceberg, however, so our study looked at how shipping could affect cloud properties on average over a long time period.”
Using natural-color images of ship tracks over the southeast Atlantic Ocean as observed on by the Moderate Resolution Imaging Spectroradiometer (MODIS) on NASA’s Aqua satellite, the scientists compared the average cloud droplet concentrations from 2003 to 2015 during the cloudiest months for the region (September, October, and November) with the expected cloud droplet concentrations without shipping activity. The expected values were calculated based on statistical patterns from nearby areas. The team then calculated the difference in the amount of sunlight reflected back into space between the two scenarios using data from NASA’s Clouds and the Earth’s Radiant Energy System (CERES) instruments, which monitor the solar energy reflected by earth and the heat energy emitted by the planet.
Diamond explained that the aerosols from the ships create “seeds” in the atmosphere that water vapor can latch onto and condense into small cloud droplets. These smaller droplets make clouds brighter so that they reflect more sunlight, which creates a local cooling effect at the planet’s surface.
“That change is small on a regional scale, but it could be enough to affect global temperatures if the same phenomenon occurs worldwide,” according to study co-author Hannah Director of the University of Washington. When the team scaled their findings across the planet, they found that changes in low-lying clouds from all industrial pollution sources could block about 1 Watt of energy per square meter globally. For context, greenhouse gases from industrial activities have trapped roughly 3 Watts per square meter.
“Cloud changes caused by industrial pollution have produced a global cooling effect that is about one-third as strong as the warming from increased greenhouse gases,” said Diamond.
The algorithms developed for this study the scientists believe could be applied to study other anthropogenic sources of pollution around the world. “We can use a similar methodology to determine the effects of other human sources of aerosols like power plants,” said Diamond. “We could model the world with and without various human activities and better understand our impact on Earth’s climate.”
A massive fire broke out at the Port of Beirut on Thursday, incinerating a warehouse full of tires and oil within the port’s free zone. The same area was heavily damaged in the ammonium nitrate explosion that leveled the central port area and the adjacent waterfront on August 4. According to Lebanon’s civil defense agency, […]
Over the course of the past five days, the Australian Maritime Safety Authority arranged a medical intervention for an injured aboard a freighter in the Indian Ocean. On Saturday evening, the Spliethoff tweendecker Dolfijngracht called for assistance while under way about 1,000 nauical miles off the coast of Western Australia. A crewmember had sustained serious […]
The naval forces of the US and Bahrain recently staged a joint force training exercise which showcased the interoperability between coalition warships operating I the Arabian Gulf. Coalition Task Force Sentinel executed combined exercise Sentinel Shield supporting Sentry and Sentinel patrols in the coalition’s area of operations. The guided-missile destroyer USS John Paul Jones and […]
The U-Freight Group (UFL), with its considerable involvement in eCommerce logistics, says that the latest statistics showing that global e-commerce sales hit $25.6 trillion in 2018 are a further vindication of its decision to enter this sector of the international freight market several years ago. The latest available estimates, up 8% from 2017, were recently […]
DSV Belgium has solid experience in the transport of pharmaceutical products for different customers. With a pharma hub based at Brussels Airport a lot of experience and know-how has been built up over the years. Last weekend, the forwarder handled one hundred million mouth masks, an important milestone for its Belgian organisation that has put […]
The UK government’s new post-Brexit tariff regime will result in both winners and losers. The new regime is set to replace the European Union’s Common External Tariff from the end of the Brexit Transition Period on December 31, 2020. The UK’s commitment to the ongoing Brexit process and ending the UK’s transition from EU membership […]
The National Transportation Safety Board (NTSB) has released a Marine Accident Brief about an accident that occurred on April 15, 2019, involving the towing vessel DeJeanne Maria which struck the end of a submerged dredge pipeline while pushing two spud barges to the Gulf of Mexico. The incident occurred on the Mississippi River in Pass […]
With close to 100 daily cargo flights operated to a destination network spanning more than 65 cities across six continents, Emirates SkyCargo is delivering essential supplies and commodities to people around the world. The air cargo carrier is currently operating 11 Boeing 777 freighter aircraft, each with a capacity to transport about 100 tonnes of […]
Astral Aviation has increased its intra-African network with cargo freighters during the pandemic. While there has been a reduction in capacity to, from, and within Africa, which has been caused by a stoppage of passenger flights and limited frequencies on freighter aircraft, Astral Aviation continues to operate cargo freighters from its Nairobi hub to 13 destinations […]
Best known as a leading passenger airport serving Germany’s most populated federal state North Rhine-Westphalia, Düsseldorf has become transformed into a vital distribution point, during the COVID 19 pandemic, for medical equipment and other life-saving goods, mostly from China. Gerton Hulsman, managing director of cargo operations, reports that the handling teams are working hard to […]
Global commercial aviation charter company Albion Aviation Group is reporting that it is seeing a considerable uptake in its professional cargo broker training courses from the current global pandemic crisis and surge in charter demand. “We have completed a number webinar courses for a whole of host of companies, looking to manage their own cargo […]
Operators can continue to use pilots and other crew members who have unable to comply with certain training, recent experience, testing, and checking requirements due to the COVID-19 outbreak in support of essential operations. Additionally, this Special Federal Aviation Regulation (SFAR) provides regulatory relief to certain persons and pilot schools unable to meet duration and […]
Emirates SkyCargo has expanded its weekly scheduled cargo flight operations to cover 75 destinations across six continents. Through its wider reach, Emirates SkyCargo is able to transport essential commodities and other urgently needed cargo more rapidly across the world, allowing exporters and importers across markets to benefit from direct access to widebody cargo capacity. Some […]
Callan Marine is serving as the prime contractor to the Texas Department of Transportation for a maintenance dredging project located at the Bolivar Ferry Terminal, in Galveston, Texas. Work began in May and is estimated to be complete in late July 2020. The project consists of the removal of 600,000 cubic yards of material and […]
Network Airline Management and TAAG Angola Airlines are pleased to announce the renewal of their long-term freighter aircraft contract by an additional 12 months, sealing an ongoing partnership for the foreseeable future. Operating a regular weekly scheduled service from Liege, Belgium, to the capital of Angola, Luanda, Network Airline Management provides a Boeing 747-400F aircraft […]
Qatar Airways Cargo transported 56 SkyCell containers with vaccines from one of the largest vaccine manufacturers worldwide on its scheduled freighter and belly-hold cargo flights for its customer, CEVA Logistics. The 54-tonne shipment consisting of pneumococcal and varicella vaccines were flown from Brussels to Mumbai via the carrier’s hub in Doha on two separate flights. […]