Dissolved organic carbon (DOC) and total dissolved nitrogen (TDN) are generally considered important active biogeochemical pools of total carbon and nitrogen. Many studies have documented the contributions of soil fauna to litter decomposition, but the effects of the soil fauna on labile substances (i.e., DOC and TDN) in litter during early decomposition are not completely clear. Therefore, a f...

Research on methane and carbon dioxide emissions mainly focuses industrial emissions, cultivated land, wetlands, while few studies have studied freezing-related emissions. This paper presents field experiments conducted during soil freezing to measure concentrations in the air, near surface, soil. In addition, influence of precipitation, snowfall, air temperature, depth gas was analyzed. We obs...

Soil Sci. Soc. Am. J. 78:297–308 doi:10.2136/sssaj2013.06.0218 Received 6 June 2013. *Corresponding author ([email protected]). © Soil Science Society of America, 5585 Guilford Rd., Madison WI 53711 USA All rights reserved. No part of this periodical may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying, recording, or any information s...

The temperature dependence of freezing-induced xylem cavitation was studied in a Chihuahuan desert population of Larrea tridentata (Zygophyllaceae). Field measurements of wood temperature and xylem embolism were combined with anatomical studies and laboratory measurements of embolism in stem and root samples frozen under controlled conditions. Our laboratory experiments corroborated the previou...

Passive microwave measurements from space are known to be sensitive to the freeze/thaw (F/T) state of the land surface. These measurements are at a coarse spatial resolution (~15–50 km) and the spatial variability of the microwave emissions within a pixel can have important effects on the interpretation of the signal. An L-band ground-based microwave radiometer campaign was conducted in the Can...

This paper reviews the history of research development on coupling mechanism multiphysical field, e.g., thermo-hydro-mechanical (THM), for frozen soil. The objective is to deepen current understanding theories and field in soil dynamic changes temperature, moisture, stress fields during freezing. A new differential equation temperature moisture proposed. Based DiscreteFrechetDist algorithm, a f...

Italian wall lizards (Podarcis sicula campestris) were introduced to Long Island, New York, in 1967 and have subsequently spread through many urban and suburban communities. Their ability to spread further may be limited by their ability to tolerate the relatively cold winters of New York. We found that these lizards were able to survive cold temperatures by supercooling if they were kept dry. ...

It is well known that low soil temperatures decrease the absorptionl of water by plants. Many years ago SACHS (24) reported that tobacco and gourd plants growing in moist soil under conditions favoring a low rate of transpiration wilted when the soil was cooled to 30 to 50 C., but recovered when the soil was warmed to 120 to 180 C. Cabbage and turnips were less affected, absorbing enough water ...

We present a physically intuitive model of ice-lens formation and growth during the freezing of soils and other dense, particulate suspensions. Motivated by experimental evidence, we consider the growth of an ice-filled crack in a freezing soil. At low temperatures, ice in the crack exerts large pressures on the crack walls that will eventually cause the crack to split open. We show that the cr...

Recently, numerous studies of aggregate response to freezing have been reported. Aggregate stability has usually been inversely proportional to soil water content at the time of freezing (Bullock et al., 1988; Benoit, 1973; Bryan, 1971; Logsdail and Webber, 1959). Aggregates from poorly aggregated soils, however, are more stable when frozen at intermediate water contents (Mostaghimi et al., 198...