Changes between Version 391 and Version 392 of doc/tec/changelog_2018

Timestamp:

Dec 2, 2014 6:00:09 PM (10 years ago)

Author:

maronga

Comment:

--

doc/tec/changelog_2018

@@ -11 +11 @@
 
 ||='''Date'''  =||='''Author'''  =||='''svn\\Revision'''  =||='''Last\\Release'''  =||='''Type''' =||='''Description''' =||
+|----------------
+{{{#!td style="vertical-align:top;width: 50px"
+02/12/14
+}}}
+{{{#!td style="vertical-align:top;width: 50px"
+BM
+}}}
+{{{#!td style="vertical-align:top;width: 75px"
+r1496
+}}}
+{{{#!td style="vertical-align:top"
+3.10
+}}}
+{{{#!td style="vertical-align:top"
+N
+}}}
+{{{#!td style="vertical-align:top"
+A beta version of a land surface model (lsm) and a radiation model have been implemented.
+
+'''Land surface model:'''
+* Based on the TESSEL scheme used in the ECMWF IFS model (see [http://www.google.de/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&ved=0CCMQFjAA&url=http%3A%2F%2Fwww.ecmwf.int%2Fsites%2Fdefault%2Ffiles%2FIFS_CY40R1_Part4.pdf&ei=ePh9VJiWKebjywPd7YLwDw&usg=AFQjCNE8hTytbYfAgSjixe22sIELYgEFaA&sig2=bZ8oejJJlP0eoA4lTn1JSQ&bvm=bv.80642063,d.bGQ IFS documentation], with modifications according to H-TESSEL.
+* Implementation was realized similarily to the DALES code.
+* The scheme consists of a solver to the energy balance of the skin layer and a four-layer soil model. Moreover, a liquid water reservoir allows the interception of water by plants.
+* Activated by setting of {{{&lsm_par}}} Namelist.
+* Required parameters for {{{&lsm_par}}}:
+  * {{{veg_type = 0-19}}}, 
+  * {{{soil_type = 0-5}}}, 
+  * {{{soil_temperature}}} (temperatures for each soil level),
+  * Several other optional parameters.
+* A proper documentation will follow. Until then, the lsm should be used for testing purposes only.
+* The implementation is still under construction. Open tasks:
+  * Proper calculation of the aerodynamic resistance
+  * Add support for binary I/O support
+  * Add support for lsm data output
+  * Check for time step criterion
+  * Check use with RK-2 and Euler time-stepping
+  * Adaption for use with cloud physics
+  * Add precipitation to liquid water reservoir
+  * Consider reaction of plants at wilting point and at atmospheric saturation
+  * Consider partial absorption of the net shortwave radiation by the skin layer
+  * Allow for water surfaces, check performance for bare soils
+
+'''Radiation model:'''
+* A simple radiation model for clear sky (no clouds) conditions
+* Provides the net radiation for the energy balance solver of the lsm
+* Activated by setting of {{{&radiation_par}}} Namelist.
+* Required parameters for {{{&radiation_par}}}:
+  * {{{lambda}}} (longitude),
+  * {{{albedo}}},
+  * {{{day_init}}} (day of the year at model start),
+  * {{{time_utc_init}}} (UTC time at model start, in seconds),
+  * {{{dt_radiation}}} (temporal interval for the call of the radiation model),
+  * latitude is given by the parameter {{{phi}}} in {{{&inipar}}}.
+
+}}}
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