This is not shot in winter, but in midsummer. It looks this way because it was shot with a camera which was modified for IR photography by removing the IR blocking filter on the sensor itself which normally filters out all infrared light + adding a IR filter on the lens (blocks all normal light except infrared light). There are some colors left because it was shot in near-infrared which leaves all blue in real life as a weak red in your shot. In postprocessing you then switch the red and blue color channel and you get something like the photo below.
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©Rznag Rmrod
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