Question about MERRA

[Peter Smith]

There are a number of precipitation related parameters in the MERRA data
products.
Please see the link
http://disc.sci.gsfc.nasa.gov/mdisc/documentation/MAI3CPASM.README.MERRA.pdf
or download the MERRA filespec from GMAO site's page
http://gmao.gsfc.nasa.gov/research/merra/file_specifications.php

A search on precipitation will provide you with a number of precip parameters
eg prectot ... Total precipitation kg m-2s-1
which is the sum of three other precip parameters
precanv, preclsc, preccon (large scale precip from anvils, non-anvil and
convective precipitation, respectively.

Peter