The region is dominated by NW wind, with a maximum wind speed of 17 m/s and average wind speed of 1.3 m/s.
The Ni in ambient air at Tuxedo, even on the 14 NW wind days, could be easily assigned to sources surrounding NYC.
Although the largest sustained apparent difference in HR occurred through most of December, only three NW wind days occurred in that month.
First, exposures of ApoE−/− mice to CAPs led them to conclude that unusually high heart rate (HR) occurred in response to elevated Ni on the NW wind days.
The authors failed to account for vertical components of air parcel movement; also, by singling out one specific trajectory from the "NW wind" days, they implied much more accuracy to the back trajectories than is justified.
Such back trajectories using the internet-based HYSPLIT model (National Oceanic and Atmospheric Administration 2006) indicate that for the 14 NW wind days, elevated Ni in CAPs on those days was more likely due to sources other than the Sudbury stack > 800 km distant.
