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Meaning of the output variables regarding U tendency of gravity drag

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wmingch@...
Meaning of the output variables regarding U tendency of gravity drag

Dear all,

When I analyze the output data of WACCM5, I am confused with some output variables regaridng the gravity wave drag. For example, the long_name of BUTEND1 is U tendency c < -40, and another variable UTEND1 has the same long name (U tendency c < -40). What is the difference for the two variables?Besides, for the variable UTGWSPEC (long name is U tendency-gravity wave spectrum), what gravity wave it included (e.g. stationary waves generated by orography, convectoin and fonts)?  it will be great help if someone could give me some hints. Thanks in advance for kind help.

Best,

Mingcheng 



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