Hi all,
I have conducted WRF runs with and without increased sea level pressure (about 0.1 mb) and found that in the run with increased sea level pressure, the surface temperature (T2) is much less (more than 1 K) than in the run without increased sea level pressure. Also, the underestimation of temperature only exists at low levels (below about 900 mb).
In both runs, the sea level pressure instead of surface pressure is provided so that the surface pressure in WRF should be calculated based on terrain height, temperature, moisture and sea level pressure. According to the hypsometric equation, I can imagine that an increased sea level pressure will bring a decreased surface pressure. But I don't how does WPS or WRF make such an adjustment and why the adjustment only exists at low levels.
Could you please help me figure it out? It would be great if there are some references to cite.
Thank you so much for your kind help!
Bests,
Zeyu
I have conducted WRF runs with and without increased sea level pressure (about 0.1 mb) and found that in the run with increased sea level pressure, the surface temperature (T2) is much less (more than 1 K) than in the run without increased sea level pressure. Also, the underestimation of temperature only exists at low levels (below about 900 mb).
In both runs, the sea level pressure instead of surface pressure is provided so that the surface pressure in WRF should be calculated based on terrain height, temperature, moisture and sea level pressure. According to the hypsometric equation, I can imagine that an increased sea level pressure will bring a decreased surface pressure. But I don't how does WPS or WRF make such an adjustment and why the adjustment only exists at low levels.
Could you please help me figure it out? It would be great if there are some references to cite.
Thank you so much for your kind help!
Bests,
Zeyu