Atmospheric Transport: Volcanic Ash

Volcanic Ash Modeling Volcanic ash is a hazard to aircraft because it can degrade engine performance and navigational and operational instrumentation. Operationally, the NWS runs the ARL-developed HYSPLIT model to forecast the transport and dispersion of volcanic ash in and near the U.S. Volcanic Ash Advisory Centers’ (VAAC) (Anchorage, AK, and Washington, DC) areas of responsibility.  Volcanic ash is…

HYSPLIT Volcanic Ash Model

Volcanic Ash Model Mt. Augustine volcanic eruption(Credit: Cyrus Read, U.S. Geological Survey) Volcanic ash is hazardous to aircraft because it can degrade engine performance and navigational and operational instrumentation. Meteorologists at the VAAC and the Meteorological Watch Offices use the HYSPLIT forecasts, among other sources of information, for writing Volcanic Ash Advisories and Significant Meteorological…

ARL News: National Volcanic Ash Operations Plan – August 30, 2007

ARL News National Volcanic Ash Operations Plan August 30, 2007 The Office of the Federal Coordinator for Meteorological Services and Supporting Research (OFCM) will soon publish the “National Volcanic Ash Operations Plan for Aviation and Support of the International Civil Aviation Organization (ICAO) International Airways Volcano Watch”. ARL’s role, outlined in the plan, is to…

Weekly-November-4-2022

ARL Weekly News – November 4, 2022 Recent Events HYSPLIT V8.0 Upgrade Test Begun NCEP Central Operations, or NCO, has begun the 30 day test of HYSPLIT  model version 8.0.5. Once  successfully completed, the National Weather Service will benefit from a number of new features will be with this upgrade: Science updates: Improved initialization of…

ARL Weekly News – Oct 28, 2022

ARL Weekly News – October 28, 2022 Recent Events House Appropriations Staff Visit ARL Staff members from the House Appropriations Committee visited the National Center for Weather and Climate prediction on October 25. ARL Director Ariel Stein provided an overview of the Laboratory and its current and future research. Following that, Howard Diamond provided a…

ARL Weekly 7-15-2022

ARL Weekly News – July 15, 2022 Recent Events HYSPLIT V8 Approved for Implementation Implementation of HYSPLIT v8 at the NCEP was presented to the Office Director and approved on July 14, 2022. Scientific upgrades to HYSPLITv8 include upgrading code, coupling of HYSPLIT to GEFS and HREF for probabilistic forecasts of hazards such as volcanic…

ARL Weekly News – July 1, 2022

ARL Weekly News – July 1, 2022 Recent Events Implementation of HYPSLIT v8 planned for fall of 2022.  ARL’s HYSPLIT team and EMC are preparing to implement HYPSLIT v8 into operations in the fall of 2022. A briefing to the NCEP directors is scheduled for July 14th. Please let Alice Crawford or Jeff McQueen know if…

ARL Weekly News – May 13, 2022

ARL Weekly News – May 13, 2022 Recent Events Sandia Labs Supplements MACCS Code with HYSPLIT Capabilities Sandia National Laboratories has published its report documenting the effort to supplement the Gaussian atmospheric transport and diffusion model currently in MACCS, a nuclear accident consequence analysis code, with a new option using ARL’s HYSPLIT model. Now, calculations…

ARL Weekly May 6, 2022

ARL Weekly News – May 6, 2022 Recent Events  Ariel Stein Appointed ARL Director NOAA has announced Dr. Ariel Stein is appointed the Director, Air Resources Laboratory (ARL) effective May 8, 2022. Dr. Stein is currently Director of NOAA’s Global Monitoring Laboratory. Ariel has agreed to serve as Acting Director of NOAA’s Global Monitoring Laboratory…