"'Much of the ice in the image likely floated there from farther upriver, where tidal currents are weaker and salinity is lower,' NASA explained. 'These conditions allow water to freeze sooner and at higher temperatures than the faster-flowing, brackish water near the river's mouth, shown here. 'A complete freeze of the Hudson around Manhattan is unlikely, experts say, although it did occur back in 1888.'"
"However, NASA points out that iced-up rivers can have several other implications. This includes flooding and infrastructure damage, and changes in hydrologic processes that affect water quality and aquatic habitats. 'Scientists, government agencies, and emergency responders are increasingly turning to remote sensing technologies such as synthetic aperture radar and hyperspectral imaging to track river ice,' the US space agency explained. 'Improved monitoring can aid in water resource management and mitigate ice's effects on infrastructure and ecosystems.'"
New York endured a week of bitter cold at the end of January that killed at least ten people and produced a January 28 high of just 23°F (-5°C). Landsat 8 captured an overhead image showing large areas of the Hudson River, East River, and the Jacqueline Kennedy Onassis Reservoir frozen. Much of the ice likely floated from upriver where weaker tidal currents and lower salinity allow earlier freezing. A complete freeze around Manhattan is unlikely though it occurred in 1888. Iced rivers disrupted ferry service and can cause flooding, infrastructure damage, and changes to water quality and aquatic habitats. Agencies increasingly use remote sensing technologies to track river ice and improve water resource management.
Read at Mail Online
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