Continuum Database - Revision history

Martin.turbet at 09:43, 13 April 2026

2026-04-13T09:43:38Z

Martin.turbet at 09:38, 13 April 2026

2026-04-13T09:38:54Z

Martin.turbet at 12:02, 3 April 2025

2025-04-03T12:02:49Z

Martin.turbet: /* Words of caution */

2025-02-13T18:11:41Z

‎Words of caution

Martin.turbet at 08:25, 13 February 2025

2025-02-13T08:25:30Z

Martin.turbet at 08:02, 13 February 2025

2025-02-13T08:02:49Z

Martin.turbet at 07:54, 13 February 2025

2025-02-13T07:54:39Z

Martin.turbet at 17:49, 12 February 2025

2025-02-12T17:49:24Z

Martin.turbet at 17:46, 12 February 2025

2025-02-12T17:46:42Z

Martin.turbet: /* N2-N2 */

2025-02-12T17:28:58Z

‎N2-N2

@@ Line 1: / Line 1: @@
 As of February 2025, we have now implemented a new continuum database in the Generic PCM. The continuum files are provided here (please contact Martin if you have any suggestion, question, new additions you want to make): https://web.lmd.jussieu.fr/~lmdz/planets/generic/datagcm/continuum/
-As of April 2026, the continuum database is now splitted in two parts : a CIA database and a far wing database
+As of April 2026, the continuum database is now splitted in two parts : a CIA database and a far wing database. Below we list the CIA tables of the database. The line far wing database is constructed from line lists and experimental correction factors, using codes like SpeCT or kspectrum.
 = File format and location =
-The files are stored here: https://web.lmd.jussieu.fr/~lmdz/planets/generic/datagcm/continuum/
+The files are stored here: https://web.lmd.jussieu.fr/~lmdz/planets/generic/datagcm/continuum/ in two sections : a CIA (collision-induced absorption) database and a line far wing database
 The first line of the file (header) list the grid of temperatures.

@@ Line 1: / Line 1: @@
-As of February 2025, we have now implemented a new continuum database in the Generic PCM. The continuum files are provided here (please contact Martin if you have any suggestion, question, new additions you want to make): https://web.lmd.jussieu.fr/~lmdz/planets/generic/datagcm/continuum_data/
+As of February 2025, we have now implemented a new continuum database in the Generic PCM. The continuum files are provided here (please contact Martin if you have any suggestion, question, new additions you want to make): https://web.lmd.jussieu.fr/~lmdz/planets/generic/datagcm/continuum/
+As of April 2026, the continuum database is now splitted in two parts : a CIA database and a far wing database
 = File format and location =
-The files are stored here: https://web.lmd.jussieu.fr/~lmdz/planets/generic/datagcm/continuum_data/
+The files are stored here: https://web.lmd.jussieu.fr/~lmdz/planets/generic/datagcm/continuum/
 The first line of the file (header) list the grid of temperatures.
 For the next lines, the first column corresponds to the wavenumber (in cm-1), then the absorption coefficient at the first temperature, etc.
-Note : We have stored all the ancient continuum files (e.g., HITRAN format) in the https://web.lmd.jussieu.fr/~lmdz/planets/generic/datagcm/continuum_data/pre-2025_continua/ directory.
+Note : We have stored all the ancient continuum files (e.g., HITRAN format) in the https://web.lmd.jussieu.fr/~lmdz/planets/generic/datagcm/continuum/CIA_data/pre-2025_continua/ directory.
 = Units =
@@ Line 26: / Line 26: @@
 Note : The HITRAN continuum files are in cm^5 molecule-2 units. You can convert HITRAN continuum data into cm-1 amagat-2 by dividing them by <math>1.385 \times  10^{-39}</math>
-= List of continua in the database =
+= List of collision-induced absorption (CIA) continua in the database =
 Below we provide the list of continua included in the database, with some details on how they were computed.
@@ Line 176: / Line 176: @@
 Beware that some of the correlated-k tables do already include some of the continuum terms here. For instance CO2_H2Ovar correlated-k table (and most of the CO2-thick historical correlated-k table) include the 0-250cm-1 CIA band and the Fermi doublet of CO2-CO2. For these "old" tables, we recommend that you switch back to the old continuum tables, to avoid counting some terms twice.

@@ Line 1: / Line 1: @@
-As of February 2025, we have now implemented a new continuum database in the Generic PCM. The continuum files are provided here (please contact Martin if you have any suggestion, question, new additions you want to make): https://web.lmd.jussieu.fr/~lmdz/planets/LMDZ.GENERIC/datagcm/continuum_data/
+As of February 2025, we have now implemented a new continuum database in the Generic PCM. The continuum files are provided here (please contact Martin if you have any suggestion, question, new additions you want to make): https://web.lmd.jussieu.fr/~lmdz/planets/generic/datagcm/continuum_data/
 = File format and location =
-The files are stored here: https://web.lmd.jussieu.fr/~lmdz/planets/LMDZ.GENERIC/datagcm/continuum_data/
+The files are stored here: https://web.lmd.jussieu.fr/~lmdz/planets/generic/datagcm/continuum_data/
 The first line of the file (header) list the grid of temperatures.
 For the next lines, the first column corresponds to the wavenumber (in cm-1), then the absorption coefficient at the first temperature, etc.
-Note : We have stored all the ancient continuum files (e.g., HITRAN format) in the https://web.lmd.jussieu.fr/~lmdz/planets/LMDZ.GENERIC/datagcm/continuum_data/pre-2025_continua/ directory.
+Note : We have stored all the ancient continuum files (e.g., HITRAN format) in the https://web.lmd.jussieu.fr/~lmdz/planets/generic/datagcm/continuum_data/pre-2025_continua/ directory.
 = Units =

← Older revision		Revision as of 18:11, 13 February 2025
Line 175:		Line 175:
	= Words of caution =		= Words of caution =

−	Beware that some of the correlated-k tables do already include some of the continuum terms here. For instance CO2_H2Ovar correlated-k table do include the 0-250cm-1 CIA band and the Fermi doublet of CO2-CO2. For these "old" tables, we recommend that you switch back to the old continuum tables, to avoid counting some terms twice.	+	Beware that some of the correlated-k tables do already include some of the continuum terms here. For instance CO2_H2Ovar correlated-k table (and most of the CO2-thick historical correlated-k table) include the 0-250cm-1 CIA band and the Fermi doublet of CO2-CO2. For these "old" tables, we recommend that you switch back to the old continuum tables, to avoid counting some terms twice.

@@ Line 152: / Line 152: @@
 The H2-N2 continuum file combines all data from Karman+2019: https://hitran.org/cia/ (N2-H2_2011.cia).
 [[File:H2-N2 CIA new database fev2025.png|thumb|H2-N2 new database fev2025.png]]
@@ Line 166: / Line 168: @@
 The H2-CH4 continuum file combines all data from Karman+2019: https://hitran.org/cia/ (H2-CH4_eq_2011.cia). We took the "equilibrium" file which is the most accurate choice in general for most of our giant planet (H2-rich atmospheres) applications. Differences between "equilibrium" and "norm" appear at temperatures << 100K.
 [[File:H2-CH4 CIA new database fev2025.png|thumb|H2-CH4 new database fev2025.png]]

← Older revision		Revision as of 08:02, 13 February 2025
Line 144:		Line 144:

	The CH4-N2 continuum file combines all data from Karman+2019: https://hitran.org/cia/ (N2-CH4_2011.cia file).		The CH4-N2 continuum file combines all data from Karman+2019: https://hitran.org/cia/ (N2-CH4_2011.cia file).
		+
		+	The temperature dependency is extrapolated from 40 to 600K.

	[[File:CH4-N2 CIA new database fev2025.png\|thumb\|CH4-N2 new database fev2025.png]]		[[File:CH4-N2 CIA new database fev2025.png\|thumb\|CH4-N2 new database fev2025.png]]

@@ Line 101: / Line 101: @@
 The CO2-O2 continuum file combines all data from Karman+2019: https://hitran.org/cia/ (O2-CO2_2011.cia file) and data from Baranov et al. 2004 (digitized from Fig. 7).
 [[File:CO2-O2 CIA new database fev2025.png|thumb|CO2-O2 new database fev2025.png]]
@@ Line 107: / Line 109: @@
 The O2-N2 continuum file combines all data from Karman+2019: https://hitran.org/cia/ (O2-N2_2021.cia and O2-N2_theory_temp_2018.cia).
 [[File:O2-N2 CIA new database fev2025.png|thumb|O2-N2 new database fev2025.png]]

@@ Line 85: / Line 85: @@
 The CO2-H2 continuum file combines all data from Turbet+20, Mondelain+21 and Fakhardji+21.
 [[File:CO2-H2 CIA new database fev2025.png|thumb|CO2-H2 CIA new database fev2025.png]]
@@ Line 91: / Line 93: @@
 The CO2-H2 continuum file is built from Turbet+20.
 [[File:CO2-CH4 CIA new database fev2025.png|thumb|CO2-CH4 new database fev2025.png]]

@@ Line 51: / Line 51: @@
 The O2-O2 continuum file combines all data from Karman+2019: https://hitran.org/cia/ (O2-O2_2018b.cia and O2-O2_theory_temp_2018.cia files).
 [[File:O2-O2 CIA new database fev2025.png|thumb|O2-O2 CIA new database fev2025.png]]
@@ Line 57: / Line 59: @@
 The CH4-CH4 continuum file combines all data from Karman+2019: https://hitran.org/cia/ (CH4-CH4_2011.cia file). Only a single CH4 CIA band has been characterized so far (see Borysow & Frommhold 1987).
 [[File:CH4-CH4 CIA new database fev2025.png|thumb|CH4-CH4 CIA new database fev2025.png]]

← Older revision		Revision as of 17:28, 12 February 2025
Line 43:		Line 43:

	The N2-N2 continuum file combines all data (roto-translational, fundamental and first overtone bands) from Karman+2019: https://hitran.org/cia/ (N2-N2_2021.cia file).		The N2-N2 continuum file combines all data (roto-translational, fundamental and first overtone bands) from Karman+2019: https://hitran.org/cia/ (N2-N2_2021.cia file).
		+
		+	The temperature dependency is extrapolated from 70 to 500K.

	[[File:N2-N2 CIA new database fev2025.png\|thumb\|N2-N2 CIA new database fev2025.png]]		[[File:N2-N2 CIA new database fev2025.png\|thumb\|N2-N2 CIA new database fev2025.png]]