Fort.22 file - Revision history

Jddratli at 17:33, 4 October 2024

2024-10-04T17:33:56Z

← Older revision		Revision as of 13:33, 4 October 2024
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	==NWS = 30 Blended GAHM & Background Gridded Wind and Pressure==		==NWS = 30 Blended GAHM & Background Gridded Wind and Pressure==
	This format is a combination of GAHM (<code>NWS=12</code>) and a gridded background meteorological field (<code>NWS=20</code>). The core of a tropical cyclone is represented using the GAHM model and read in from a file named NWS_20_fort.22, which should be created following the procedure presented in the [[#NWS = 20 Generalized Asymmetric Holland Vortex Model (GAHM)\|section on <code>NWS=20</code>]]. The user must also supply gridded wind and pressure files in the form of an OWI-style fort.22 file, a fort.221 file, and a fort.222 file, details on these are in the [[#NWS = ±12 Oceanweather ASCII Format Gridded Wind and Pressure\|section on <code>NWS=12</code>]]. ADCIRC internally blends the wind and pressure fields from these two sets of inputs over a user-controlled distance. Specifically, the <code>[[pureVortex]]</code> and <code>[[pureBackground]]</code> inputs in the [[fort.15 file]] (for formatting, see info on the [[Supplemental meteorological/wave/ice parameters\|meteorological parameter line]]) are coefficients used to define where transitions between the vortex and background meteorology occur. At or within the distance <code>pureVortexvortexRMW</code> of the storm's center, the GAHM meteorology is used. At or beyond the distance <code>pureBackgroundvortexRMW</code> of the storm's center, the background meteorology is used. In between these, a linear distance-weighted average of the two sets of meteorology is used to define the forcing.		This format is a combination of GAHM (<code>NWS=20</code>) and a gridded background meteorological field (<code>NWS=12</code>). The core of a tropical cyclone is represented using the GAHM model and read in from a file named NWS_20_fort.22, which should be created following the procedure presented in the [[#NWS = 20 Generalized Asymmetric Holland Vortex Model (GAHM)\|section on <code>NWS=20</code>]]. The user must also supply gridded wind and pressure files in the form of an OWI-style fort.22 file, a fort.221 file, and a fort.222 file, details on these are in the [[#NWS = ±12 Oceanweather ASCII Format Gridded Wind and Pressure\|section on <code>NWS=12</code>]]. ADCIRC internally blends the wind and pressure fields from these two sets of inputs over a user-controlled distance. Specifically, the <code>[[pureVortex]]</code> and <code>[[pureBackground]]</code> inputs in the [[fort.15 file]] (for formatting, see info on the [[Supplemental meteorological/wave/ice parameters\|meteorological parameter line]]) are coefficients used to define where transitions between the vortex and background meteorology occur. At or within the distance <code>pureVortexvortexRMW</code> of the storm's center, the GAHM meteorology is used. At or beyond the distance <code>pureBackgroundvortexRMW</code> of the storm's center, the background meteorology is used. In between these, a linear distance-weighted average of the two sets of meteorology is used to define the forcing.

	[[Category:input files]]		[[Category:input files]]
	[[Category:meteorology]]		[[Category:meteorology]]
	[[Category:unverified behavior]]		[[Category:unverified behavior]]

Wpringle: /* File Structure */

2024-10-02T20:51:21Z

File Structure

← Older revision		Revision as of 16:51, 2 October 2024
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	Meridional (north-south) dimension name<br />		Meridional (north-south) dimension name<br />
	Latitude variable name<br />		Latitude variable name<br />
	Sea-level Pressure variable name<br />		Sea-level Pressure variable name [plus optional HPa units]<br />
	Zonal 10-m Wind Velocity name<br />		Zonal 10-m Wind Velocity name<br />
	Meridional 10-m Wind Velocity name<br />		Meridional 10-m Wind Velocity name<br />

Wpringle: /* Example (WRF output) */

2024-10-02T20:50:53Z

Example (WRF output)

← Older revision		Revision as of 16:50, 2 October 2024
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	south_north<br />		south_north<br />
	XLAT<br />		XLAT<br />
	PSFC<br />		PSFC [optional: append HPa to PSFC (i.e., PSFCHPa) to indicate that units of pressure are in hPa/mbar, otherwise assumed to be in Pa]<br />
	U10<br />		U10<br />
	V10<br />		V10<br />

Jddratli: /* Notes */

2024-10-02T19:29:40Z

Notes

← Older revision		Revision as of 15:29, 2 October 2024
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	===Notes===		===Notes===
	If the time variable is not in a datetime format (e.g., is a float in minutes since..) the datetime format can be set to a dummy name, e.g., 'minutes'. The code checks to see if the first character of the datetime format is '%'. If not the code will assume to simply begin reading from the first time snap. If the datetime variable is available the code will work out which time snap to start reading from based on the reference date, [[NCDATE]] located near or at the bottom of the [[fort.15 file]].		If the time variable is not in a datetime format (e.g., is a float in minutes since..) the datetime format can be set to a dummy name, e.g., 'minutes'. The code checks to see if the first character of the datetime format is '%'. If not the code will assume to simply begin reading from the first time snap. If the datetime variable is available the code will work out which time snap to start reading from based on the reference date, [[NCDATE]] located near or at the bottom of the [[fort.15 file]]. If pressure units are in hectopascals, add 'HPa' to the pressure variable line in the fort.22. For example, if the pressure variable is 'mslp', make it 'mslpHPa'.

	==NWS = 15 H*Wind Gridded Wind and Inferred Pressure==		==NWS = 15 H*Wind Gridded Wind and Inferred Pressure==

Taylorgasher: Added NWS = 30 info

2021-11-30T14:43:30Z

Added NWS = 30 info

← Older revision		Revision as of 10:43, 30 November 2021
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	So the command line for <code>NWS=20</code> is: <code>./aswip -n 20 -m 4 -z 2</code>		So the command line for <code>NWS=20</code> is: <code>./aswip -n 20 -m 4 -z 2</code>

			==NWS = 30 Blended GAHM & Background Gridded Wind and Pressure==
			This format is a combination of GAHM (<code>NWS=12</code>) and a gridded background meteorological field (<code>NWS=20</code>). The core of a tropical cyclone is represented using the GAHM model and read in from a file named NWS_20_fort.22, which should be created following the procedure presented in the [[#NWS = 20 Generalized Asymmetric Holland Vortex Model (GAHM)\|section on <code>NWS=20</code>]]. The user must also supply gridded wind and pressure files in the form of an OWI-style fort.22 file, a fort.221 file, and a fort.222 file, details on these are in the [[#NWS = ±12 Oceanweather ASCII Format Gridded Wind and Pressure\|section on <code>NWS=12</code>]]. ADCIRC internally blends the wind and pressure fields from these two sets of inputs over a user-controlled distance. Specifically, the <code>[[pureVortex]]</code> and <code>[[pureBackground]]</code> inputs in the [[fort.15 file]] (for formatting, see info on the [[Supplemental meteorological/wave/ice parameters\|meteorological parameter line]]) are coefficients used to define where transitions between the vortex and background meteorology occur. At or within the distance <code>pureVortexvortexRMW</code> of the storm's center, the GAHM meteorology is used. At or beyond the distance <code>pureBackgroundvortexRMW</code> of the storm's center, the background meteorology is used. In between these, a linear distance-weighted average of the two sets of meteorology is used to define the forcing.

	[[Category:input files]]		[[Category:input files]]
	[[Category:meteorology]]		[[Category:meteorology]]
	[[Category:unverified behavior]]		[[Category:unverified behavior]]

Taylorgasher at 22:10, 19 June 2020

2020-06-19T22:10:57Z

← Older revision		Revision as of 18:10, 19 June 2020
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	A single meteorological input file (wind velocity and atmospheric pressure) is read when meteorological forcing has been indicated by the [[NWS]] parameter in the [[fort.15 file]]. More precisely, the format of and need for the fort.22 file depend on the ones and tens (i.e. the last 2) digits and the sign (positive/negative) of <code>NWS</code> (see [[NWS#Value_Seen_in_fort.15_File\|here]]). See also the [[supplemental meteorological/wave/ice parameters]] and [[wind stress]] pages.		A single meteorological input file (wind velocity and atmospheric pressure) is read when meteorological forcing has been indicated by the <code>[[NWS]]</code> parameter in the [[fort.15 file]]. More precisely, the format of and need for the fort.22 file depend on the ones and tens (i.e. the last 2) digits and the sign (positive/negative) of <code>NWS</code> (see [[NWS#Value_Seen_in_fort.15_File\|here]]). See also the [[supplemental meteorological/wave/ice parameters]] and [[wind stress]] pages.

	== General Notes ==		== General Notes ==

Taylorgasher at 22:03, 19 June 2020

2020-06-19T22:03:04Z

← Older revision		Revision as of 18:03, 19 June 2020
Line 1:		Line 1:
	A single meteorological input file (wind velocity and atmospheric pressure) is read when meteorological forcing has been indicated by the [[NWS]] parameter in the [[fort.15 file]]. More precisely, the format of and need for the fort.22 file depend on the ones and tens (i.e. the last 2) digits and the sign (positive/negative) of <code>NWS</code> (see [[NWS#Value_Seen_in_fort.15_File\|here]]). See also the [[~~Supplemental Meteorological~~/~~Wave~~/~~Ice Parameters~~]] and [[wind stress]] pages.		A single meteorological input file (wind velocity and atmospheric pressure) is read when meteorological forcing has been indicated by the [[NWS]] parameter in the [[fort.15 file]]. More precisely, the format of and need for the fort.22 file depend on the ones and tens (i.e. the last 2) digits and the sign (positive/negative) of <code>NWS</code> (see [[NWS#Value_Seen_in_fort.15_File\|here]]). See also the [[supplemental meteorological/wave/ice parameters]] and [[wind stress]] pages.

	== General Notes ==		== General Notes ==

Taylorgasher: or not?

2020-06-19T21:54:59Z

or not?

← Older revision		Revision as of 17:54, 19 June 2020
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	=== Notes ===		=== Notes ===

	==NWS = ~~±8 (~~Symmetric~~) Dynamic~~ Holland Vortex Model==		==NWS = 8 Dynamic Symmetric Holland Vortex Model==

	===File Structure===		===File Structure===

Taylorgasher: seems like -8 is allowed

2020-06-19T21:52:30Z

seems like -8 is allowed

← Older revision		Revision as of 17:52, 19 June 2020
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	=== Notes ===		=== Notes ===

	==NWS = 8 (Symmetric) Dynamic Holland Vortex Model==		==NWS = ±8 (Symmetric) Dynamic Holland Vortex Model==

	===File Structure===		===File Structure===

Taylorgasher at 21:36, 19 June 2020

2020-06-19T21:36:55Z

← Older revision		Revision as of 17:36, 19 June 2020
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	end j loop		end j loop

	==NWS = 11==		==NWS = 11 Stripped National Weather Service (NWS) ETA 29km==
	<span style="color:red">It appears there is no fort.22 file for this format, and users should consult the </span>[[fort.200]]<span style="color:red"> page, but this hasn't been confirmed. </span>		<span style="color:red">It appears there is no fort.22 file for this format, and users should consult the </span>[[fort.200]]<span style="color:red"> page, but this hasn't been confirmed. </span>