Riparian seed dispersal phenology and snowmelt streamflow timing in the upper South Platte River Basin, observed in 2010-2011 and simulated for 1962-2098

Dates

Publication Date: 2019-09-24
Start Date: 1961-01-01
End Date: 2098-12-31

Citation

Shafroth, P.B., Perry, L.G., Hay, L.E., Markstrom, S.L., and Bock, A., 2019, Riparian seed dispersal phenology and snowmelt streamflow timing in the upper South Platte River Basin, observed in 2010-2011 and simulated for 1962-2098: U.S. Geological Survey data release, https://doi.org/10.5066/P994V9LI.

Summary

This dataset presents observations and model projections of climate, riparian cottonwood and willow seed release phenology, snowmelt streamflow timing, and relative timing of seed release and snowmelt peak streamflow in the upper South Platte River Basin, USA. We collected field observations of seed release phenology from three riparian Salicaceae species at 14 riparian sites and used those observations to develop 2-3 temperature-driven phenology models for each species. We used those phenology models, together with PRMS hydrological models of streamflow at six of the sites, to simulate historical phenology, snowmelt streamflow timing, and relative timing based on gridded temperature data from 1961-1990 and to project future phenology, [...]

Summary

This dataset presents observations and model projections of climate, riparian cottonwood and willow seed release phenology, snowmelt streamflow timing, and relative timing of seed release and snowmelt peak streamflow in the upper South Platte River Basin, USA. We collected field observations of seed release phenology from three riparian Salicaceae species at 14 riparian sites and used those observations to develop 2-3 temperature-driven phenology models for each species. We used those phenology models, together with PRMS hydrological models of streamflow at six of the sites, to simulate historical phenology, snowmelt streamflow timing, and relative timing based on gridded temperature data from 1961-1990 and to project future phenology, snowmelt streamflow timing, and relative timing until 2098 based on downscaled CMIP3 future climate projections. The first spreadsheet in the dataset (weekly_phenology_measurements_2010-2011.csv) presents weekly observations of seed release phenology by 89 Populus deltoides spp. monilifera - plains cottonwood trees, 91 Salix amygdaloides - peachleaf willow trees, and 135 Salix exigua - narrowleaf willow shrubs in 2010 and 2011 at 14 riparian sites in the upper North and South Platte River Basins. A second spreadsheet (annual_phenology_thresholds_2010-2011.csv) presents annual dates of estimated 20% seed release by each individual at each site, which were used to calibrate phenology models. A third spreadsheet (daily_site_temperatures_2009-2011.csv) presents daily mean, maximum, and minimum temperatures at the 14 sites prior to and during phenology observations (Sept 2009 to Dec 2011; derived from Daymet gridded climate data), which also were used to calibrate phenology models. A fourth spreadsheet (annual_snowmelt-peak-timing_2010-2011.csv) presents annual dates of 50% of annual streamflow (a proxy for snowmelt peak streamflow timing) at seven sites with USGS NWIS streamflow gage data during the two years of phenology observations, for use in evaluating current relative timing of snowmelt streamflow and seed release. A fifth spreadsheet (simulated_phenology_and_snowmelt-peak-timing_1961-1990.csv) presents annual dates of 50% of annual streamflow in years with USGS NWIS streamflow gage data between 1961-1990, together with simulated annual dates of four different metrics of snowmelt peak streamflow timing and 20% seed release from each species phenology model from 1961-1990 (models forced with gridded climate data) at the six PRMS sites, for use in evaluating historic relative timing of snowmelt streamflow and seed release. A sixth dataset (projections_1962-2098.csv) presents annual and seasonal mean temperature and precipitation at the six PRMS sites and across the upstream watersheds of the six PRMS sites in 1962-2098, derived from downscaled CMIP3 future climate projections, for use in evaluating temporal trends in projected future climate at and upstream of the sites. In addition, the sixth dataset presents projected annual dates of four metrics of snowmelt peak streamflow timing and 20% seed release from each species phenology model from 1962-2098 (models forced with downscaled CMIP3 future climate projections) at the six PRMS sites, for use in evaluating temporal trends in projected future snowmelt peak streamflow timing and seed release phenology at the sites. Further, the sixth dataset presents projected numbers of days between snowmelt peak streamflow and 20% seed release for each streamflow metric and phenology model from 1962-2098 at the six PRMS sites, for use in evaluating temporal trends in projected future relative timing of snowmelt peak streamflow and seed release. A seventh spreadsheet (baseline-adjusted_projections_2020-2098) presents the same variables as the sixth spreadsheet, but adjusted to remove differences in simulated baseline conditions by subtracting simulated 1962-1990 site means from 2020-2098 annual values.

Contacts

Point of Contact :: Laura Perry
Process Contact :: Laura Perry
Originator :: Laura Perry, Patrick B Shafroth
Metadata Contact :: Laura Perry, Fort Collins Science Center
Publisher :: U.S. Geological Survey
Distributor :: U.S. Geological Survey - ScienceBase
SDC Data Owner :: Fort Collins Science Center
USGS Mission Area :: Ecosystems

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Riparian phenology and streamflow timing in Colorado.xml Original FGDC Metadata	View	210.14 KB	application/fgdc+xml
annual_phenology_thresholds_2010-2011.csv		17.76 KB	text/csv
annual_snowmelt-peak-timing_2010-2011.csv		237 Bytes	text/csv
baseline-adjusted_projections_2020-2098.csv		1.95 MB	text/csv
column_definitions.csv		54.08 KB	text/csv
daily_site_temperatures_2009-2011.csv		391.21 KB	text/csv
projections_1962-2098.csv		3.59 MB	text/csv
snowmelt-peak-timing_and_phenology_1961-1990.csv		10.76 KB	text/csv
weekly_phenology_measurements_2010-2011.csv		120.73 KB	text/csv

Related External Resources

Type: Related Primary Publication

Perry, L.G., Shafroth, P.B., Hay, L.E., Markstrom, S.L., and Bock, A.R., 2019, Projected warming disrupts the synchrony of riparian seed release and snowmelt streamflow: New Phytologist.	https://doi.org/10.1111/nph.16191

Purpose

This dataset was created to predict future change in riparian seed release phenology, snowmelt streamflow timing, and the relative timing of these annual events under projected future climates, because these changes may impact riparian cottonwood and willow seedling recruitment. In addition, the data were collected to increase basic knowledge of riparian cottonwood and willow seed release phenology and of the role of daily temperatures in driving spatial and annual variation in seed release phenology.

Riparian seed dispersal phenology and snowmelt streamflow timing in the upper South Platte River Basin, observed in 2010-2011 and simulated for 1962-2098

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