Our site saves small pieces of text information (cookies) on your
device in order to verify your login. These cookies are essential
to provide access to resources on this website and it will not
work properly without.
Learn more
<p>
Dear all,
</p>
<p>
currently I’m evaluating some of my model results against E-
<span class="caps">
OBS
</span>
data for a time span of 30 years. I consider e.g. the seasonal mean of the surface temperature. I figured that when I use the T_2M field for comparison, the model is too cold by roughly 2°C (especially pronounced in summer). However, when I use the T_2M_AV field, the results fit much better to observations. I’m prinitng both fields with daily resolution.
</p>
<p>
As the name suggests, I guess T_2M_AV is the time average of the T_2M field (actually the documentation https://www.cosmo-model.org/content/model/documentation/core/cosmo_io_guide_6.0.pdf does not know T_2M_AV). What is not quite clear to me is
1. over which time this average is exactly performed
2. and to which time instance the printed T_2M field corresponds?
</p>
<p>
Is it like the average is performed over a period of an output (e.g. for me one day) and the field T_2M is a snapshot at one border of that interval (e.g. at 0:00)?
<br/>
Does this imply that if one is interested in comparing time means against observations one should use T_2M_AV and if one wants to use the model data for forcing another model one should use T_2M?
</p>
<p>
Thank you very much in advance and with best regards,
<br/>
Sven
</p>
<p>
Dear all,
</p>
<p>
currently I’m evaluating some of my model results against E-
<span class="caps">
OBS
</span>
data for a time span of 30 years. I consider e.g. the seasonal mean of the surface temperature. I figured that when I use the T_2M field for comparison, the model is too cold by roughly 2°C (especially pronounced in summer). However, when I use the T_2M_AV field, the results fit much better to observations. I’m prinitng both fields with daily resolution.
</p>
<p>
As the name suggests, I guess T_2M_AV is the time average of the T_2M field (actually the documentation https://www.cosmo-model.org/content/model/documentation/core/cosmo_io_guide_6.0.pdf does not know T_2M_AV). What is not quite clear to me is
1. over which time this average is exactly performed
2. and to which time instance the printed T_2M field corresponds?
</p>
<p>
Is it like the average is performed over a period of an output (e.g. for me one day) and the field T_2M is a snapshot at one border of that interval (e.g. at 0:00)?
<br/>
Does this imply that if one is interested in comparing time means against observations one should use T_2M_AV and if one wants to use the model data for forcing another model one should use T_2M?
</p>
<p>
Thank you very much in advance and with best regards,
<br/>
Sven
</p>
currently I’m evaluating some of my model results against E-
OBS
data for a time span of 30 years. I consider e.g. the seasonal mean of the surface temperature. I figured that when I use the T_2M field for comparison, the model is too cold by roughly 2°C (especially pronounced in summer). However, when I use the T_2M_AV field, the results fit much better to observations. I’m prinitng both fields with daily resolution.
As the name suggests, I guess T_2M_AV is the time average of the T_2M field (actually the documentation https://www.cosmo-model.org/content/model/documentation/core/cosmo_io_guide_6.0.pdf does not know T_2M_AV). What is not quite clear to me is
1. over which time this average is exactly performed
2. and to which time instance the printed T_2M field corresponds?
Is it like the average is performed over a period of an output (e.g. for me one day) and the field T_2M is a snapshot at one border of that interval (e.g. at 0:00)?
Does this imply that if one is interested in comparing time means against observations one should use T_2M_AV and if one wants to use the model data for forcing another model one should use T_2M?
Thank you very much in advance and with best regards,
Sven
<p>
1. T_2M_AV is averaged over the output time interval (similar as the radiation outputs starting with an “A”)
<br/>
2. T_2M is an instantaneous value at the end of the output interval
<br/>
When you use T_2M for comparison the output interval should be 3h or less.
</p>
<p>
1. T_2M_AV is averaged over the output time interval (similar as the radiation outputs starting with an “A”)
<br/>
2. T_2M is an instantaneous value at the end of the output interval
<br/>
When you use T_2M for comparison the output interval should be 3h or less.
</p>
1. T_2M_AV is averaged over the output time interval (similar as the radiation outputs starting with an “A”)
2. T_2M is an instantaneous value at the end of the output interval
When you use T_2M for comparison the output interval should be 3h or less.
Difference between T_2M and T_2M_AV
Dear all,
currently I’m evaluating some of my model results against E- OBS data for a time span of 30 years. I consider e.g. the seasonal mean of the surface temperature. I figured that when I use the T_2M field for comparison, the model is too cold by roughly 2°C (especially pronounced in summer). However, when I use the T_2M_AV field, the results fit much better to observations. I’m prinitng both fields with daily resolution.
As the name suggests, I guess T_2M_AV is the time average of the T_2M field (actually the documentation https://www.cosmo-model.org/content/model/documentation/core/cosmo_io_guide_6.0.pdf does not know T_2M_AV). What is not quite clear to me is 1. over which time this average is exactly performed 2. and to which time instance the printed T_2M field corresponds?
Is it like the average is performed over a period of an output (e.g. for me one day) and the field T_2M is a snapshot at one border of that interval (e.g. at 0:00)?
Does this imply that if one is interested in comparing time means against observations one should use T_2M_AV and if one wants to use the model data for forcing another model one should use T_2M?
Thank you very much in advance and with best regards,
Sven
1. T_2M_AV is averaged over the output time interval (similar as the radiation outputs starting with an “A”)
2. T_2M is an instantaneous value at the end of the output interval
When you use T_2M for comparison the output interval should be 3h or less.