Hi Jitesh,
Certainly you can do a separate Mann Kendall test for, say, each and every point on the 61x61 grid as you run through the length 45 dimension (time?). Or a take the mean temperature of each grid, and then run through the length 45 dimension. That gives a single test result. Or divide the grid into subblocks, take the mean temperatue of each one, do a Mann Kendall test on each subblock. Are any of these situations what you have in mind?
I assumed a test along a particular dimension but this would apply to a grid of any two axes while running along the third.
