[Wrf-users] terrain height

Feng Liu fliu at mag.maricopa.gov
Wed Jun 9 15:49:19 MDT 2010

Hi, Aijun,
The terrain height over Pacific ocean should be zero for open sea or
positive for some islands. Some settings in your model might be wrong
otherwise. However, terrain height may go negative over inland, for
example, Imperial Valley (California), it is almost entirely below sea
level-235 feet (72 metres) below at the edge of the Salton Sea, and
Turpan Valley in Xingjiang, China, is below sea level 150 meters at the
lowest area. I wonder if you check the locations of negative terrain
heights and see if they are located somewhere such as Imperial Valley.
Hope this will be helpful.

-----Original Message-----
From: wrf-users-bounces at ucar.edu [mailto:wrf-users-bounces at ucar.edu] On
Behalf Of Aijun Xiu
Sent: Wednesday, June 09, 2010 10:13 AM
To: wrf-users at ucar.edu
Subject: [Wrf-users] terrain height

  Is there anyone out there noticed the terrain height can go negative 
over Pacific ocean? Is this
normal or we didn't run the model correctly? Thanks in advance if you 
can share your experience
and thoughts.

Aijun Xiu, Research Associate Professor       Phone: 919-966-2064
Institute for the Environment                 Fax :  919-843-3113
University of North Carolina at Chapel Hill   Email: aijun at email.unc.edu
Bank of America Plaza, CB# 6116
137 E. Franklin St., Room 657
Chapel Hill, NC 27599-6116

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