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<br />r' <br /> <br />20 <br /> <br />15 <br /> <br />III <br />c: <br />o <br />'';; <br />~ 10 <br />en <br /> <br /> <br />5 <br /> <br />o 20 40 60 80 100 <br /> <br />Record Length (Years) <br /> <br />Figure 3. Frequency of record length for 57 AE.S. <br />mountain climate stations. <br /> <br /> <br /> <br />JA SONDJ FMAMJ <br /> <br />Months <br /> <br />Figure 5. Average monthly snowfall over the year for <br />57 mountain AE.S. climate stations. <br /> <br />20 <br /> <br />15 <br /> <br />"0 <br />... <br />o <br />(J <br />Q) <br />a:: <br />..- <br />o <br />l!? 10 <br />III <br />Q) <br />>- <br />c: <br />III <br />Q) <br />~ <br /> <br />17 <br /> <br />5 <br /> <br /> <br />28 <br /> <br />.Dsc <br /> <br />~ Alberta <br /> <br />27 <br /> <br />25 <br /> <br />25 <br /> <br />28 <br /> <br />16 <br /> <br />28 <br /> <br /> <br />J F M A Ml M15 J Seasonal <br />Date <br />Figure 4. Average record length of Alberta and <br />British Columbia snow survey courses throughout <br />measurement season. The. seasonal standard devia- <br />tions is also given. <br /> <br /> <br /> <br /> <br />JASQNDJFMAMJ <br /> <br />Months <br />Figure 6. Average monthly number of snowfall-days <br />over the year for 57 mountain AE.S. climate stations. <br /> <br />9 <br />