Details
| Originalsprache | Englisch |
|---|---|
| Fachzeitschrift | Vadose zone journal |
| Jahrgang | 12 |
| Ausgabenummer | 1 |
| Publikationsstatus | Veröffentlicht - Feb. 2013 |
| Extern publiziert | Ja |
Abstract
Snowmelt infiltration and soil thawing processes are essential for understanding surface and subsurface hydrology under the cold and arid climatic conditions found in grazed Inner Mongolia grassland soils. Over a 6-yr period (2004-2009), we evaluated the effects of winter grazing and freezing/thawing cycles on (i) soil hydraulic and thermal proper- ties, (ii) the dynamics of field soil moisture and temperature, and (iii) the contributions of snowmelt and soil thawing to the summer water balance. Two adjacent contrasting sites were selected: a site that has been ungrazed since 1999 (UG99), and a site that has been grazed during the winter (WG). The results showed that the freezing/thawing cycles changed soil hydraulic and thermal properties. Associated with those freezing-induced changes, winter grazing decreased soil moisture by 5-10% throughout the whole year (October 2005 to September 2006), increased soil temperature by 1 to 3°C in summer, and decreased it by 2 to 5°C in winter. The grazed site with lower vegetation/snow cover and larger thermal conductivity had greater freezing rates and larger soil temperature fluctuations on a daily scale than the ungrazed site. Winter precipitation (snow + rainfall) contributed 15% of the total annual water balance for the UG99 site, but only 11% for WG site. We concluded that a detailed analysis of the spring snowmelt infiltration was critical for calculating seasonal water and energy balances in this region to fully understand the hydrological and ecological processes.
ASJC Scopus Sachgebiete
- Agrar- und Biowissenschaften (insg.)
- Bodenkunde
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in: Vadose zone journal, Jahrgang 12, Nr. 1, 02.2013.
Publikation: Beitrag in Fachzeitschrift › Artikel › Forschung › Peer-Review
}
TY - JOUR
T1 - Influence of winter grazing on water and heat flow in seasonally frozen soil of Inner Mongolia
AU - Zhao, Y.
AU - Huang, M.
AU - Zhao, Y.
AU - Peth, S.
AU - Horn, R.
AU - Horton, R.
AU - Liu, F.
PY - 2013/2
Y1 - 2013/2
N2 - Snowmelt infiltration and soil thawing processes are essential for understanding surface and subsurface hydrology under the cold and arid climatic conditions found in grazed Inner Mongolia grassland soils. Over a 6-yr period (2004-2009), we evaluated the effects of winter grazing and freezing/thawing cycles on (i) soil hydraulic and thermal proper- ties, (ii) the dynamics of field soil moisture and temperature, and (iii) the contributions of snowmelt and soil thawing to the summer water balance. Two adjacent contrasting sites were selected: a site that has been ungrazed since 1999 (UG99), and a site that has been grazed during the winter (WG). The results showed that the freezing/thawing cycles changed soil hydraulic and thermal properties. Associated with those freezing-induced changes, winter grazing decreased soil moisture by 5-10% throughout the whole year (October 2005 to September 2006), increased soil temperature by 1 to 3°C in summer, and decreased it by 2 to 5°C in winter. The grazed site with lower vegetation/snow cover and larger thermal conductivity had greater freezing rates and larger soil temperature fluctuations on a daily scale than the ungrazed site. Winter precipitation (snow + rainfall) contributed 15% of the total annual water balance for the UG99 site, but only 11% for WG site. We concluded that a detailed analysis of the spring snowmelt infiltration was critical for calculating seasonal water and energy balances in this region to fully understand the hydrological and ecological processes.
AB - Snowmelt infiltration and soil thawing processes are essential for understanding surface and subsurface hydrology under the cold and arid climatic conditions found in grazed Inner Mongolia grassland soils. Over a 6-yr period (2004-2009), we evaluated the effects of winter grazing and freezing/thawing cycles on (i) soil hydraulic and thermal proper- ties, (ii) the dynamics of field soil moisture and temperature, and (iii) the contributions of snowmelt and soil thawing to the summer water balance. Two adjacent contrasting sites were selected: a site that has been ungrazed since 1999 (UG99), and a site that has been grazed during the winter (WG). The results showed that the freezing/thawing cycles changed soil hydraulic and thermal properties. Associated with those freezing-induced changes, winter grazing decreased soil moisture by 5-10% throughout the whole year (October 2005 to September 2006), increased soil temperature by 1 to 3°C in summer, and decreased it by 2 to 5°C in winter. The grazed site with lower vegetation/snow cover and larger thermal conductivity had greater freezing rates and larger soil temperature fluctuations on a daily scale than the ungrazed site. Winter precipitation (snow + rainfall) contributed 15% of the total annual water balance for the UG99 site, but only 11% for WG site. We concluded that a detailed analysis of the spring snowmelt infiltration was critical for calculating seasonal water and energy balances in this region to fully understand the hydrological and ecological processes.
UR - http://www.scopus.com/inward/record.url?scp=84874399356&partnerID=8YFLogxK
U2 - 10.2136/vzj2012.0059
DO - 10.2136/vzj2012.0059
M3 - Article
AN - SCOPUS:84874399356
VL - 12
JO - Vadose zone journal
JF - Vadose zone journal
SN - 1539-1663
IS - 1
ER -