About the setting of sea surface temperature (sst) in wrf-roms coupling mode

[SakuraLz]

I have recently been using the coupled model of wrf-roms to simulate the effects of typhoons and the ocean. But during the simulations I found that roms is largely unaffected by typhoons in the offshore region sst and there is no morning or evening temperature change. I think this may be because I have some switches that are not turned on. For the sst temperature field I used the fnl data and generated the wrflowinp file. I wonder if you know what to do to solve this problem. Here are some of my parameters, I hope you can help me. mangkhut.h.txt namelist.input.txt roms_mangkhut_r1.in.txt

[SakuraLz]

The thin black line in the diagram is the result of my simulation, the model also had two days of warm-up time before. It looks like it was basically unaffected by the typhoon and I'm not sure what the reason for this is.

[jcwarner-usgs]

what does a color plot of the WRF SST look like on 09/16 00:00? how does that compare to the ROMS surface temp?

is roms getting the wind stresses? if you plot sustr or svstr, are the stresses coming to roms?

[SakuraLz]

I put the colour chart of sst at 09/16 00:00 below. And I have plotted the sst minus 09/15 00:00 results for each moment after that. As you can see, the change in sst is noticeable in the deeper water, but very little change in the offshore area. As for sustr or svstr. I think the roms have received the wind effects of wrf. I have likewise put the sustr results for 09/16 00:00 below. Do you have any idea where the problem lies?

[jcwarner-usgs]

which Q locations are the time series from? i cant read the title on those figures. Do you have a time series of temp at station Q4? maybe add those Q sites onto the temp pcolors. In general it looks like lots of cooling offshore !! that is good. but not as much cooling at the coastal Q sites. That could be from the initial temperature structure.
something you could do is look at why the ocean cooled. was it from vertical mixing? how deep did it mix. etc.

[SakuraLz]

I have placed the temperature changes for the four stations below. As you can see, the temperature change is more pronounced at site Q4 and only weak when offshore. I am a little less understanding of what you mean by the initial temperature structure. Is it caused by the initial boundary field file? But why don't typhoons make SSTs lower? This is somewhat different from the measured data. And there is no early or late variation in SSTs, is this not related to the parameter file settings?Is there any way to make the SST variation more pronounced in the offshore area?

[jcwarner-usgs]

i think the model is working correctly. but there problem is with the initial temp field. none of the time series have the same buoy and ocean starting temp. so the model is not going to be able to get to a final temperature that matches the buoys if the model does not start correctly.

some other things you can try is to activate SWAN and allow the waves to enhance the mixing

define SWAN_MODEL

define MCT_INTERP_OC2AT

define MCT_INTERP_WV2AT

define MCT_INTERP_OC2WV

if defined WRF_MODEL && defined SWAN_MODEL

define DRAGLIM_DAVIS

define COARE_TAYLOR_YELLAND <--- there are several options here such as DRENNAN or OOST

endif

taht will create more mixing. the Sandy test case has all 3 models as an example.

[SakuraLz]

OK, thank you for your help. I will try to adjust the initial field of the temperature afterwards and check the results. I will also try to couple the SWAN model. I will let you know if the results improve.