HYSPLIT Examples

HYSPLIT Model Examples The following links provide examples of the types of output products that can be produced with the HYSPLIT transport and dispersion model. Google Earth (kml/kmz) Trajectories (7.2 KB) – 3 particle trajectories originating at 10, 750 and 1500 meters above ground level and run for a simulation of 12 hours using the NCEP…

Inline WRF-HYSPLIT Coupling

Inline WRF-HYSPLIT Coupling HYSPLIT was originally designed to run offline utilizing meteorological data such as are provided by WRF-ARW. A new model framework has been developed that the revised HYSPLIT model is coupled inline with WRF-ARW to take advantage of the higher temporal frequency of the meteorological variables produced by the meteorological model, as well…

HYSPLIT Inverse Modeling

HYSPLIT Inverse Modeling The Hybrid Single Particle Lagrangian Integrated Trajectory (HYSPLIT) model developed at NOAA’s Air Resources Laboratory has been widely used to study the atmospheric pollutant transport and dispersion in both forward and backward modes. Among those applications, the backward trajectory of a single pollutant particle is often used to identify the potential source…

Smoke: Prescribed Burns

HYSPLIT Smoke Calculation Originated from a Prescribed Burn The HYSPLIT model can be run to estimate the spatial and temporal evolution of smoke (as PM2.5) originated from a prescribed burn. The location and the area of the burn are the only required inputs. Emissions and heat release PM2.5 emissions and heat release are estimated from…

Dust

HYSPLIT Dust Modeling Daily Dust Forecasts run operationally by the National Weather Service Background Research A model for the emission of PM10 dust was developed in 2001 (Draxler et al., 2001) using the concept of a threshold friction velocity which is dependent on surface roughness. Surface roughness in turn was correlated with geomorphology or soil properties…

HYSPLIT Model Updates

Highlights of Recent Updates April 2020 Revision (v.5.0.0) Inclusion of center of mass trajectory option. Updated bdyfiles. Integration of python in postprocessing graphic utilities. Incorporation of STILT routines, which include: 1) a new vertical interpolation scheme for ARL files derived from the WRF model; 2) a new mixed layer scheme that uses excess temperature for…

CMAPF Mapping Routines

CMAPF Mapping Routines What are the CMAPF routines? The CMAPF routines are libraries of tools – functions and subroutines that allow meteorological model programs to be independent of the choice of map projection on which their model is based. Most models are based on a rectangular lattice of mesh points drawn on some specific map,…

HYSPLIT Publications & Meteorological Data Information

HYSPLIT Publications/Meteorological Data Information The following references should be used if publishing a paper using the HYSPLIT model in general: Stein, A.F., Draxler, R.R, Rolph, G.D., Stunder, B.J.B., Cohen, M.D., and Ngan, F., (2015). NOAA’s HYSPLIT atmospheric transport and dispersion modeling system, Bull. Amer. Meteor. Soc., 96, 2059-2077, http://dx.doi.org/10.1175/BAMS-D-14-00110.1 Draxler, R.R., 1999: HYSPLIT4 user’s guide. NOAA Tech. Memo.…

Air Resources Laboratory – News

2001 – 2014 News and Press Release Archive 2014 Laboratory Highlight: Air Resources Laboratory to Produce New Datasets for Improved Modeling of Convective Initiation – November, 2014 Laboratory Highlight: NOAA Contributes to Comprehensive Test Ban Treaty Organization Mission with Atmospheric Modeling – September, 2014 Laboratory Highlight: ARL/Cooperative Institute Employee to Investigate Methane Emissions from Fracking – September, 2014…