Frozen soil increases overland flow and flood risk, but the question remains under which conditions frozen significantly impedes infiltration. In this study, we simulated infiltration into with a numerical model to investigate theoretical controls on for several types. We found that capacities of soils intermediate texture are most affected by freezing. Furthermore, examined influence initial s...

An extensive ice body is buried under less than 20 cm to several meters of debris in Beacon Valley (Dry Valleys, Antarctica). The thermal behavior of the upper 20 m of permafrost, including the annually freezing and thawing surface (active layer) in this region of low relative humidity and very low annual precipitation, has great scientific interest. Distinctly different behavior from wet, arct...

Although efforts have been made to sample microorganisms from polar regions and to investigate a few of the properties that facilitate survival at freezing or subzero temperatures, soil communities that overwinter in areas exposed to alternate freezing and thawing caused by Foehn or Chinook winds have been largely overlooked. We designed and constructed a cryocycler to automatically subject soi...

Permanent grass vegetation on sloping soils is an option to protect fields from erosion, but decaying grass may liberate considerable amounts of dissolved reactive P (DRP) in springtime runoff. We studied the effects of freezing and thawing of grassed soil on surface runoff P concentrations by indoor rainfall simulations and tested whether the peak P concentrations could be reduced by amending ...

We investigated the hibernation ecology and cold hardiness of hatchling diamondback terrapins, Malaclemys terrapin (Schoepf, 1793), an estuarine species that reaches 42°N along the Atlantic Ocean. During 3 years of study, about 50% of the nests we monitored harboured hatchlings during winter, and the majority (87%) of these individuals survived despite being intermittently exposed to subfreezin...

Manure fertilization of soil significantly impacts the level of nitrous oxide (N2O) emission. Despite their short duration, periods of significant N2O emissions during soil thaws in winter and spring are an important portion of the total annual emissions from agricultural lands. The goal of this study was to understand the effects of tillage, moisture content and manure application on N2O emiss...

Abstract—A number of studies have been conducted recently to investigate the influence of randomly oriented fibers on some engineering properties of cohesive and cohesionless soils. However, few studies have been carried out on freezing-thawing behavior of fine-grained soils modified with discrete fiber inclusions and additive materials. This experimental study was performed to investigate the ...

abstract plants growth and development and physiological activities occur in a certain air temperature range. spit of this fact that zero temperature named as a freezing temperature, in agriculture meteorology, freezing happen in lower temperature which is different for plants that lead to their tissues damage. early autumn freezing cause damage to harvesting of cotton and sugar beet and affect...

The invasive Argentine ant, Linepithema humile (Mayr) (Hymenoptera: Formicidae) has been evident in the North Carolina Piedmont, United States for 90 yr but has failed to spread further north. We investigated the mechanisms preventing this expansion. The Argentine ant ceases foraging at temperatures below 5°C and we hypothesized that winter soil temperatures at higher latitudes restricted fora...