Dr. Kam's research article is accepted in Journal of Climate. The title of the article is "Climate model assessment of changes in winter-spring streamflow timing over North America." In this study, robustness across models, start/end dates for trends, and assumptions about internal variability is evaluated. The co-authors include Chris Milly (USGS hydrologist) and Tom Knutson (NOAA GFDL meteorologist).
The key findings of this study (from the abstract) are
1) Marginal evidence for an emerging detectable anthropogenic influence (according to four or five of nine models) is found in the north-central U.S., where winter-spring streamflows have been coming earlier.
2) Weaker indications of detectable anthropogenic influence (three of nine models) are found in the mountainous western U.S./southwestern Canada and in extreme northeastern U.S./Canadian Maritimes.