In collaboration with Università Vita - Salute San Raffaele, PhD program in Molecular Medicine offers a panel
of courses that expose students to the
most exciting and
active research areas in the field and provide training in the transferable skills required for a successful career in academia and beyond.
For the entire Northern Hemisphere, there is evidence
of an increase in both storm frequency and intensity during the cold season since 1950,1 with storm tracks having shifted slightly towards the poles.2, 3 Extremely heavy snowstorms increased in number during the last century in northern and eastern parts
of the United States, but have been less frequent since 2000.11,15 Total seasonal snowfall has generally decreased in southern and some western
areas, 16 increased in the northern Great Plains and Great Lakes region, 16,17 and not changed in other
areas, such as the Sierra Nevada, although snow is melting earlier in the year and more precipitation is falling as rain versus snow.18 Very snowy winters have generally been decreasing in frequency in
most regions over the last 10 to 20 years, although the Northeast has been seeing a normal number
of such winters.19 Heavier - than - normal snowfalls recently observed in the Midwest and Northeast U.S. in some years, with little snow in other years, are consistent with indications
of increased blocking (a large scale pressure pattern with little or no movement)
of the wintertime circulation
of the Northern Hemisphere.5 However, conclusions about trends in blocking have been found to depend on the method
of analysis, 6 so the assessment and attribution
of trends in blocking remains an
active research area.