Berthoud Pass CODOS Site
Elevation: 11,300'
Latitude: 39°48'11.91"N
Longitude: 105°46'39.23"W
Slope: 4° Aspect: ESE
Adjoining Watershed: Fraser River
Associated Snotel: Berthoud Summit
Berthoud Pass CODOS Site
Elevation: 11,300'
Latitude: 39°48'11.91"N
Longitude: 105°46'39.23"W
Slope: 4° Aspect: ESE
Adjoining Watershed: Fraser River
Associated Snotel: Berthoud Summit
Berthoud Pass CODOS Reference & Archives
Berthoud Pass CODOS Site, March 19, 2013
See CODOS Updates & Alerts for state-wide and general dust-related posts
Dust Enhanced Runoff Classification
Dust Enhanced Runoff Classification
CODOS has now observed eleven seasons of dust-enhanced snowmelt runoff behavior throughout the Colorado mountains (WY 2006-2018). Hydrographs at headwater stream gauges have been evaluated and classified within the framework of this dust enhanced snowmelt runoff space utilizing a 3 x 3 x 3 cell matrix corresponding to general characterizations of SWE, dust intensity, and spring weather, as shown in this figure.
A conceptual dust enhanced snowmelt runoff model integrating the interactions of March 1 SWE, dust intensity, and spring precipitation.
Water Years 2006-2018 have been analyzed and classified for the following stream gauge associated with the Berthoud Pass CODOS site:
Fraser River near Winter Park (pdf)
For a detailed discussion of this approach, see the state-wide Dust Enhanced Runoff Classification section.
March, April, May Precipitation
March, April, May Precipitation
SWE Plots
for Berthoud Pass CODOS Site
SWE Plots
for Berthoud Pass CODOS Site
The first nine plots below show a single Water Year's SWE relative to the site's historical record (1971 - current). The last two plots compare SWE and Dust on Snow events for two consecutive years. The shaded bands represent non-exceedence percentiles in the following order (from the bottom up):
Minimum - 10th percentile (dark gray)
10th - 30th percentiles (medium gray)
30th - 70th percentiles (light gray) with 50% trace in the middle
70th - 90th percentiles (medium gray)
90th - maximum (dark gray)
For a more detailed explanation, see http://www.wrcc.dri.edu/spi/explanation.html
Snowmelt Rates
for Berthoud Pass CODOS Site
Snowmelt Rates
for Berthoud Pass CODOS Site
Analysis of Berthoud Summit Snotel data for Water Years 2006-2017 snowmelt seasons showing date and quantity of peak SWE, days from peak SWE to “snow all gone” (SAG), total additional precipitation after the date of peak SWE, an “adjusted” mean daily rate of snowmelt adding the additional precipitation to the peak SWE total, the maximum five-day moving average of daily melt, and the mean air temperature over the entire snowmelt period, from peak SWE to SAG. POR refers to the snotel's entire period of record. The Berthoud Summit Snotel site experiences very good solar access, with no shading from the east, south, or west. This site is unique in this regard, among the CODOS Snotel sites, and snowmelt rates at this site most fully reflect the impacts of direct solar (radiative) forcing in dust-in-snow.
Our Snowmelt Excel Workbook Berthoud Summit contains spreadsheets for each year, including a summary aggregating all years. See our Snotel Dataset page for downloadable Excel files for each CODOS site, and an "All CODOS Sites Aggregated" Excel workbook containing spreadsheets for Water Years 2006-2018 and a summary of all years combined.
Hydrographs
for Berthoud Pass CODOS Site
Hydrographs
for Berthoud Pass CODOS Site
Snow Profiles
for Berthoud Pass CODOS Site
Snow Profiles
for Berthoud Pass CODOS Site
Download: All 17 CODOS Snow Profiles at Berthoud Pass from WY 2009 - WY 2013 (pdf).
Photo Gallery
for Berthoud Pass CODOS Site
Photo Gallery
for Berthoud Pass CODOS Site
Dust-on-snow fieldwork photos available for publication, with most recent photos displayed at the top. Please send requests for additional photos or for captions to jderry@snowstudies.org. All Photos © Center for Snow and Avalanche Studies.
Click each photo for a larger version and for captions. Mouse over the large images to display captions, including the date of the photo.
