Documentation of the Evaluation of CALPUFF and Other Long ...
Documentation of the Evaluation of CALPUFF and Other Long ... Documentation of the Evaluation of CALPUFF and Other Long ...
Model configuration options for the nine sensitivity runs are detailed in Table 6‐5. In general, model control options were held to default values with two notable exceptions, the INITD and NUMPAR variables. HYSPLIT performance is highly sensitive to the number of particles released in the simulation. The HYSPLIT parameter NUMPAR controls the number of particles released over the duration of the emissions release. The default value for NUMPAR is set to 2500, but the user must take caution to insure that a sufficient number of particles are released to provide a “smooth temporal change” in concentration fields (NOAA, 2009). The original NOAA configuration for HYSPLIT was for INITD = 104 that is a particle/puff hybrid configuration (3D part – THh‐Pv) with NUMPAR set to 1500. Original sensitivity runs found that the concentration fields were spotty; therefore, NUMPAR was set to 10000 to provide for smoother temporal evolution of the concentration fields. Table 6‐4. HYSPLIT INITD options and descriptions. INITD Value Description 0 (Default) 3D Particle Horizontal and Vertical 1 Gaussian horizontal and top‐hat vertical puff (Gh‐THv) 2 Top‐hat horizontal and vertical puff (THh‐THv) 3 Gaussian horizontal puff and vertical particle distribution (Gh‐Pv) 4 Top‐hat horizontal puff and vertical particle distribution (THh‐Pv) 103 3D particle (#0) converts to Gh‐Pv (#3) 104 3D particle (#0) converts to THh‐Pv (#4) 130 Gh‐Pv (#3) converts to 3D particle (#0) 140 THh‐Pv (#4) converts to 3D particle (#0) Table 6‐5. HYSPLIT sensitivity runs and relevant configuration parameters. Sensitivity Test INITD NUMPAR ISOT KSPL FRHS FRVS FRTS FRME INITD0 0 10000 1 NA NA NA NA NA INITD1 1 10000 1 1 1.0 0.01 0.10 0.10 INITD2 2 10000 1 1 1.0 0.01 0.10 0.10 INITD3 3 10000 1 1 1.0 0.01 0.10 0.10 INITD4 4 10000 1 1 1.0 0.01 0.10 0.10 INITD103 103 10000 1 1 1.0 0.01 0.10 0.10 INITD104 104 10000 1 1 1.0 0.01 0.10 0.10 INITD130 130 10000 1 1 1.0 0.01 0.10 0.10 INITD140 140 10000 1 1 1.0 0.01 0.10 0.10 135
Figure 6‐ ‐22 displays the t spatial mmodel perforrmance statistics for the tests. Wide variation n in spatial pperformancee is noted across the nin examinattion. For example, the ttwo puff bassed configuraations (INITD poorest sspatial perfo ormance of aall of the runns with low PPOD and TS v values coompared to all a other connfigurations. . The 3D parrticle based higher POOD, TS, and lower FAR inn comparison, yet it hadd a comparab INITD2. SSince the FM MS score exaamines all model/observved values g additionaal spatial me etrics use a ccontingency level of 1000 pg m 3D particcle configura ation performmed significaantly better 3 , but its spatial perfo ormance deggraded withh concentrat The puff‐ ‐particle hyb brid configurrations (INITD3, INTID4, consistenntly better overall o acrosss all four spaatial metrics ‐3 e HYSPLIT INITD sensitiviity e runs and rrequires closser D1 and INITDD2) showed the values and mmuch higherr FAR configuratioon (INITD0) hhad bly low FMS to INITD1 and reater than 0 and the , it caan be interpreted that thhe at concentrration levels above 100 ppg m ion ranges bbelow the coontingency le INITD103, INNITD104) peerformed s. ‐ evel. Figure 6‐ ‐22. Spatial model perfoormance staatistics for nnine HYSPLITT INITD senssitiviity experimeents. 136
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Model configuration options for <strong>the</strong> nine sensitivity runs are detailed in Table 6‐5. In general,<br />
model control options were held to default values with two notable exceptions, <strong>the</strong> INITD <strong>and</strong><br />
NUMPAR variables. HYSPLIT performance is highly sensitive to <strong>the</strong> number <strong>of</strong> particles released<br />
in <strong>the</strong> simulation. The HYSPLIT parameter NUMPAR controls <strong>the</strong> number <strong>of</strong> particles released<br />
over <strong>the</strong> duration <strong>of</strong> <strong>the</strong> emissions release. The default value for NUMPAR is set to 2500, but<br />
<strong>the</strong> user must take caution to insure that a sufficient number <strong>of</strong> particles are released to<br />
provide a “smooth temporal change” in concentration fields (NOAA, 2009). The original NOAA<br />
configuration for HYSPLIT was for INITD = 104 that is a particle/puff hybrid configuration (3D<br />
part – THh‐Pv) with NUMPAR set to 1500. Original sensitivity runs found that <strong>the</strong> concentration<br />
fields were spotty; <strong>the</strong>refore, NUMPAR was set to 10000 to provide for smoo<strong>the</strong>r temporal<br />
evolution <strong>of</strong> <strong>the</strong> concentration fields.<br />
Table 6‐4. HYSPLIT INITD options <strong>and</strong> descriptions.<br />
INITD Value Description<br />
0 (Default) 3D Particle Horizontal <strong>and</strong> Vertical<br />
1 Gaussian horizontal <strong>and</strong> top‐hat vertical puff (Gh‐THv)<br />
2 Top‐hat horizontal <strong>and</strong> vertical puff (THh‐THv)<br />
3 Gaussian horizontal puff <strong>and</strong> vertical particle distribution (Gh‐Pv)<br />
4 Top‐hat horizontal puff <strong>and</strong> vertical particle distribution (THh‐Pv)<br />
103 3D particle (#0) converts to Gh‐Pv (#3)<br />
104 3D particle (#0) converts to THh‐Pv (#4)<br />
130 Gh‐Pv (#3) converts to 3D particle (#0)<br />
140 THh‐Pv (#4) converts to 3D particle (#0)<br />
Table 6‐5. HYSPLIT sensitivity runs <strong>and</strong> relevant configuration parameters.<br />
Sensitivity<br />
Test INITD NUMPAR ISOT KSPL FRHS FRVS FRTS FRME<br />
INITD0 0 10000 1 NA NA NA NA NA<br />
INITD1 1 10000 1 1 1.0 0.01 0.10 0.10<br />
INITD2 2 10000 1 1 1.0 0.01 0.10 0.10<br />
INITD3 3 10000 1 1 1.0 0.01 0.10 0.10<br />
INITD4 4 10000 1 1 1.0 0.01 0.10 0.10<br />
INITD103 103 10000 1 1 1.0 0.01 0.10 0.10<br />
INITD104 104 10000 1 1 1.0 0.01 0.10 0.10<br />
INITD130 130 10000 1 1 1.0 0.01 0.10 0.10<br />
INITD140 140 10000 1 1 1.0 0.01 0.10 0.10<br />
135
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