Seasonal and interannual variations in water vapor exchange and surface water balance over a grazed steppe in central Mongolia

Liu, S.; Li, S.G.; Yu, Guirui; Asanuma, Jun; Sugita, Michiaki; Zhang, L.M.; Hu, Zhaoyong; Wei, Ying

doi:10.1016/j.agwat.2010.01.016

Cited by 17 publications

(5 citation statements)

References 33 publications

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“…The studied ecosystem had a lower ET than those with a warmer MAT like the Horqin grassland ( Li et al, 2016 ). However, our ecosystem had a higher ET than other ecosystems in this region, including those experiencing a warmer MAT like the Changbaishan forest ( Wu et al, 2015 ), Tomakomai forest ( Hirano et al, 2003 ), and Laoshan forest ( Wang et al, 2004 ) ( Table 2 ), or ecosystems having a higher MAT and a lower MAP (including the Tongyu cropland, Tongyu grassland, Changling grassland) ( Li et al, 2016 ; Liu & Feng, 2012 ), and ecosystems experiencing a similar MAT but a lower MAP like the Kherlenbayan-Ulaan grassland ( Li et al, 2007 ; Liu et al, 2010 ). Our findings indicate that the studied ecosystem evaporated more water into the atmosphere, suggesting its importance in the global water cycle.…”

Section: Discussionmentioning

confidence: 99%

Evapotranspiration dynamics and their drivers in a temperate mixed forest in northeast China

Wang

Zhu

et al. 2022

PeerJ

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Evapotranspiration (ET) is a vital part of the global water cycle and is closely related to carbon sequestration. Analysing ET dynamics and their drivers would benefit for improving our understanding of the global water and carbon cycles. Using an eddy covariance (EC) approach, we analysed ET dynamics and their drivers in a temperate mixed forest over northeast China from 2016 to 2017. The results showed that 43.55% of our eddy covariance data passed the quality control. In addition, the energy balance ratio was 0.62, indicating that measurements were reliable. The measured ET showed clear single peak patterns with seasonal and diurnal variations. The daily ET ranged from 0 to 7.75 mm d−1 and the hourly ET ranged from 0 to 0.28 mm h−1. The ranges of hourly ET floated from 0 to 0.05 mm h−1 at non-growing season (November to April) while ranged from 0 to 0.28 mm h−1 at active growing season (May to October). The diurnal ET dynamics during the non-growing season were driven by air temperature (Ta), but were governed by global radiation (Rg) during the active growing season. Leaf area index (LAI) comprehensively reflected the variations of Ta and Rg, and was found to be the primary factor shaping the seasonal dynamics of ET. The annual ET rates were 501.91 ± 5.30 mm year−1 and 554.60 ± 11.24 mm year−1 for 2016 and 2017, respectively. Therefore, energy supply, represented by Ta and Rg, governed ET dynamics in our temperate mixed forest, while variables representing the energy supply affecting ET dynamics differed among seasons and time scales. ET dynamics indicated that a temperate mixed forest is important to the global water cycle. Our results improved our understanding of ET dynamics in the studied region.

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Section: Discussionmentioning

confidence: 99%

Evapotranspiration dynamics and their drivers in a temperate mixed forest in northeast China

Wang

Zhu

et al. 2022

PeerJ

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“…artemisioides 7 days after watering (Figure ) indicates a change in the amount of distribution of plant‐available water in the root zone (Denmead and Shaw, ; Williams and Albertson, ). Not only are daily patterns of ET i and E b influenced by soil water availability in combination with low soil hydraulic conductivity but these factors may also be more important than atmospheric water demand (Stoy et al ., ; Liu et al ., ; Pingintha et al ., ; Van Heerwaarden et al ., ; Wilske et al ., ). The classical simple approximation of soil water potential–ET relations defines ET regimes as either water limited or energy limited (Seneviratne et al ., and references therein).…”

Section: Discussionmentioning

confidence: 99%

The limited impact of vegetation on the water balance of mine waste cover systems in semi‐arid Australia

et al. 2014

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In (semi‐)arid environments, mine waste cover systems aim to minimize drainage into underlying hazardous wastes by maximizing evaporation from soil and transpiration from vegetation. We estimated the evapotranspiration (ET) for an area occupied by characteristic semi‐arid native Australian plant species. Using an open top chamber, we measured diurnal and daily ET of two plant species – Senna artemisioides (silver cassia) and Sclerolaena birchii (galvanized burr) – after a simulated rainfall event, as well as evaporation (E) from bare soil. Both ET and E decreased with increasing time after initial watering. However, we observed different temporal patterns for daily ET and E, indicating that S. artemisioides and S. birchii are relatively intensive and extensive water exploiters, respectively. We found a strong positive linear relationship between ET or E and the atmospheric water demand represented by the vapour pressure deficit. This correlation was more pronounced in the morning than in the afternoon, indicating a diminishing water supply from the soil associated with a declining unsaturated hydraulic conductivity of the soil in the afternoon. We used the estimated values of ET and E to project the effect of species composition on plot ET in relation to total vegetation coverage. Although both species survive and grow under the dry conditions at the study site, their influence on plot ET was rather small because of the low vegetation coverage. On this basis, we conclude that the relevance of plants on ET cover systems is small under such water‐limited conditions of semi‐arid and arid climates. Copyright © 2014 John Wiley & Sons, Ltd.

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“…In general, the annual evapotranspiration of rangeland in arid lands is almost equal to the annual precipitation [18,19], with a few exceptions such as areas with shallow groundwater tables. In cultivated land, the evapotranspiration by crops is also basically equal to the annual precipitation, although the depth of water absorption may be greater than that of rangeland plants [20].…”

Section: Study Areamentioning

confidence: 99%

Effects of Wheat and Rapeseed Production on Soil Water Storage in Mongolian Rangeland

Miyasaka

Ota

et al. 2021

Agriculture

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In recent years, Mongolia has witnessed an increase in not only wheat fields, which have been present for a long time, but also rapeseed fields. This has led to increasing concerns about soil degradation due to inappropriate cultivation. This study aims to determine the impacts of rapeseed production on soil water storage in Mongolia. The soil water content and matric potential were measured in wheat and rapeseed fields and adjacent steppe rangeland for five years, including crop production and fallow years, and the soil water storages in the fields were compared. The results demonstrated that the matric potential below the root zone in the rapeseed field and both rangelands was drier than the wilting point, whereas the potential in the wheat field was usually almost the same or wetter than this point. The comparison of the amount of soil water storage during the fallow year with that of the adjacent rangeland showed it to be 5–10% higher for the wheat field and almost equal for the rapeseed field. Field management must consider the fact that rapeseed fields use more water than is required by wheat fields and that less water is stored during fallow periods.

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Seasonal and interannual variations in water vapor exchange and surface water balance over a grazed steppe in central Mongolia

Cited by 17 publications

References 33 publications

Evapotranspiration dynamics and their drivers in a temperate mixed forest in northeast China

Evapotranspiration dynamics and their drivers in a temperate mixed forest in northeast China

The limited impact of vegetation on the water balance of mine waste cover systems in semi‐arid Australia

Effects of Wheat and Rapeseed Production on Soil Water Storage in Mongolian Rangeland

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