Thursday

1. Most of the WRF idealized cases get their initial meteorological state from:

The metgrid.exe program, same as the real-data cases

A single sounding, the text file is located in each test case directory

The namelist.input file provides thermal, moisture, and momentum profiles

Idealized cases do not use the WPS program, and therefore (a) cannot be the answer. The namelist does not provide any information on thermal, moisture, and momentum profiles. Most of the idealized cases get their input data from a single sounding that provides thermal, moisture, and momentum profiles.

Explanation

Idealized cases do not use the WPS program, and therefore (a) cannot be the answer. The namelist does not provide any information on thermal, moisture, and momentum profiles. Most of the idealized cases get their input data from a single sounding that provides thermal, moisture, and momentum profiles.

2. After running the idealized case initialization program, ideal.exe, the input file(s) created for the WRF model are:

Wrinput_d01, wrfinput_d02, wrfbdy_d01

Wrfinput_d01, wrfbdy_d01

Wrfinput_d01

Other than print-outs, no files are created by ideal.exe

An idealized case typically uses non-specified boundary conditions, hence it does not require a wrfbdy file. Because the initial condition is typically set by a sounding, no nest input file is necessary.

Explanation

An idealized case typically uses non-specified boundary conditions, hence it does not require a wrfbdy file. Because the initial condition is typically set by a sounding, no nest input file is necessary.

3. Adding a state variable (with all settings for I/O, dimensions, type, internal name in files, nesting options) requires how many lines of changes in the Registry.EM_COMMON file?

Zero

One

About 10

More than twenty

4. To enable changes made to the file Registry.EM_COMMON, the following steps are required.

Re-compile only

Re-configure and re-compile only

Clean, re-configure, and re-compile

The registry is a runt-time option, no additional processing is required for the changes to take effect

5. The Registry file is involved with local variables inside of physics schemes

True

False

See "WRF Registry and Examples" slides.

Explanation

See "WRF Registry and Examples" slides.

6. The Registry file is involved with any variable requiring I/O, communication, or nesting.

True

False

See "WRF Registry and Examples" slides.

Explanation

See "WRF Registry and Examples" slides.

7. What programs use the Registry system?

All of WPS and all of WRF

WPS only

All of WRF (real.exe, wrf.exe, and ndown.exe)

The wrf.exe program only

8. New geographical datasets ingested by the geogrid program can be in which format(s)?

NetCDF

GRIB

Binary raster

All of the above

9. For which fields can a user supply high resolution static data?

Topography

Land use

Any field that already exists in the GEOGRID.TBL

And field at all

Only (a) and (c)

10. Geographical datasets processed through the GEOGRID.TBL must be:

On a regular latitude-longitude grid

On a grid dimensioned less than 99999 x 99999 points

Sufficient to cover the entire model domain

All of the above

11. The METGRID.TBL allows users to add observations to a model domain.

True

False

The METGRID.TBL file controls how meteorological fields (from input data) are interpolated to the WRF model across the domain. The does not allow users to add observations.

Explanation

The METGRID.TBL file controls how meteorological fields (from input data) are interpolated to the WRF model across the domain. The does not allow users to add observations.

12. Masked interpolation is different from standard interpolation, due to:

The values of some fields are very different over water and over land (e.g., soil moisture is meaningless over water)

One cannot interpolate land temperature and SST over coastal areas to obtain meaningful values for either land or water points

The problem of inconsistent land and water areas between the parent and child domain

All of the above

13. The WRF model executable created by any of the idealized simulations, and the WRF model executable created by the real-data build may be used interchangeably

True

False

The wrf model executable, wrf.exe, is simply the executable that issues the commands for running the model. There is no difference in this executable built for a real or idealized case. The important difference between idealized and real cases are what takes place in ideal.exe and real.exe, i.e., how initial (and boundary) conditions are created.

Explanation

The wrf model executable, wrf.exe, is simply the executable that issues the commands for running the model. There is no difference in this executable built for a real or idealized case. The important difference between idealized and real cases are what takes place in ideal.exe and real.exe, i.e., how initial (and boundary) conditions are created.