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Overview of the National Water Level Observation Network (NWLON) by CO-OPS

The National Water Level Observation Network (NWLON), directed by Richard Edwing at CO-OPS, monitors vital water level and environmental parameters across the United States. This includes long-term datasets crucial for establishing vertical reference systems and detecting trends. With 210 NWLON stations, including 27 in Alaska and 10 in the Arctic, the network aims to fill gaps in coastal and Great Lakes data. Collaborations with NOAA, the Army Corps of Engineers, and other agencies enhance the accuracy and utility of vital water level information for navigation, management, and research.

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Overview of the National Water Level Observation Network (NWLON) by CO-OPS

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  1. National Water Level Observation Network (NWLON) Overview Richard Edwing, Director Center for Operational Oceanographic Products and Services (CO-OPS) 2018 Hydrographic Services Review Panel Water Levels Partnership Session Juneau, AK August 2018

  2. Water Level Observations National Water Level Observation Network (NWLON) • Monitor water level, air and water temperature, wind speed/direction, barometric pressure. • Long-term data series to establish vertical reference system (datums) and trends 210 NWLON Stations Center for Operational Oceanographic Products and Services

  3. NWLON in Alaska 27 NWLON stations in Alaska* 10 of which located in the Arctic* Nationwide: 111 NWLON gaps along coasts; 3 in Great Lakes 32 gaps in Alaska, the majority (21) being in the Arctic *Including the Port Moller Station which was destroyed in a fire

  4. Historic Data 242 historic locations with datums, predictions and data Uncertainty of short term data series significantly reduced through comparison with long term stations Oldest: Attu, Massacre Bay June 1943 to May 1944

  5. Approaches in the Arctic Anchorage Red Dog Dock Prudhoe Bay

  6. Infrastructure-Free, Real-Time Water Level Measurement System (Hermit)

  7. Partnerships to NWLON Standards • NOAA Navigation Services – hydrographic and Vdatum surveys • NOAA Office for Coastal Management • Homer, Gambel, and Quigillingok • NOAA National Weather Service • Ex. Unalakleet • Army Corps of Engineers – coastal projects (Barrow) • National Park Service • Ex. Chisik Island

  8. Additional Water Level Partnerships • National Weather Service • Alaska Department of Natural Resources • Alaska Ocean Observing System Prototype AOOS data dashboard from Axiom

  9. Questions

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