TABLE 2.
Snowpack effects on soil temperature and moisture.
|
Winter |
Snowmelt |
Spring |
|||||
| Depth | Mean | SE | Mean | SE | Mean | SE | |
| Hillslope | Snow depth | 144.1 | 4.1 | 15.4 | 3.1 | 0 | 0 |
| Soil T (6 cm) | 0.2c | 0.1 | 0.3b,c | 0.1 | 11.1a | 0.4 | |
| Soil T (17 cm) | 0.7c | 0.1 | 0.7b,c | 0.1 | 10.4a | 0.4 | |
| VWC | 0.22c | 0.01 | 0.30a | 0.01 | 0.27b | 0.01 | |
| Water potential | −721.0c | 85.6 | −19.0a,b | 1.2 | −197.0b | 40.2 | |
| Floodplain | Snow depth | 164.7 | 1.2 | 8.6 | 2.4 | 0 | 0 |
| Soil T (6 cm) | 1.0b | 0.1 | 0.5c | 0.1 | 10.8a | 0.3 | |
| Soil T (17 cm) | 1.9c | 0.1 | 1.0b | 0.1 | 9.6a | 0.3 | |
| VWC | 0.33c | 0.01 | 0.43a,b | 0.01 | 0.42a | 0.01 | |
| Water potential | −12.1c | 0.1 | −8.8a,b | 0.1 | −8.8a | 0.1 | |
Time periods were binned based on snow accumulation and loss as well as regime shifts in temperature and moisture. Winter was operationally defined as 10/21/2016 – 03/07/2017, Snowmelt was 03/08/2017-05/07/2017, and Spring was 05/08/2017-6/30/2017. Means and standard errors were calculated from daily means within a binned time period. Snow depth data were collected at multiple locations within a site (Hillslope and Floodplain) on the dates of soil sampling only. Significant differences in means among time-periods are denoted with different letters (P ≤ 0.05). [Units – snow depth (cm), temperature (°C), VWC-volumetric water content (m3 H2O soil m–3), water potential (kPa)].