Nonstationarity should be considered in
FIG. 5. As in Fig. 4, but during 15–17 Jun 2013 in northern India.
MAY 2015 ZHOU E T AL . 985
future studies when the TRMM–GPM data record becomes
longer (Katz 2010; Gilleland and Katz 2014,
manuscript submitted to J. Stat. Software).