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  1. Article: Aerodynamic resistance and Bowen ratio explain the biophysical effects of forest cover on understory air and soil temperatures at the global scale

    Su, Yongxian / Zhang, Chaoqun / Chen, Xiuzhi / Liu, Liyang / Ciais, Philippe / Peng, Jian / Wu, Shengbiao / Wu, Jianping / Shang, Jiali / Wang, Yingping / Yuan, Wenping / Yang, Yuanzhi / Wu, Zhifeng / Lafortezza, Raffaele

    Agricultural and forest meteorology. 2021 Oct. 15, v. 308-309

    2021  

    Abstract: ... with ΔTs and ΔTa. The Bowen ratio is negatively related to ΔTs, but is positively related to ΔTa ...

    Abstract The microclimate dynamics under forest crown fundamentally drive plant community responses to global warming. The understory air and soil temperatures are two of the most important components of forest understory microclimate. However, there is rare method to reasonably evaluate the joint effects of forest cover on the understory air and soil temperatures. In this study, we combined a novel three-layer energy balance model and intrinsic biophysical mechanism model to evaluate the biophysical effects of forest on air (ΔTa) and soil temperatures (ΔTs) under forest crown at the global scale. Observations from in situ paired expariments and eddy covariance sites from FLUXNET 2015 were used for validations over the globe. The warming effect caused by low albedo and cooling effect caused by large aerodynamic roughness of forest lands mainly explain the global patterns of ΔTs and ΔTa, which indicate mostly a net cooling in low latitudes, but show opposite directions in large parts of temperate and high latitudes. The ratios of aerodynamic resistance of sensible heat fluxes between upper and lower layers show a positive relationship with ΔTs and ΔTa. The Bowen ratio is negatively related to ΔTs, but is positively related to ΔTa, respectively. Additionally, we examined a new indicator, which is composed of both ΔTs and ΔTa and regulated by the aerodynamic resistance parameters, to evaluate the joint biophysical effects of forest on understory air and soil temperatures. This study fills the gap in modeling the biophysical effects of forest on air and soil temperatures under forest crown over the global scale and improves our understanding of the mechanisms governing the biophysical effects of global forest cover on understory microclimate.
    Keywords Bowen ratio ; aerodynamics ; air ; cooling ; eddy covariance ; energy balance ; forests ; heat ; meteorology ; microclimate ; models ; plant communities ; roughness ; understory
    Language English
    Dates of publication 2021-1015
    Publishing place Elsevier B.V.
    Document type Article
    ZDB-ID 409905-9
    ISSN 0168-1923
    ISSN 0168-1923
    DOI 10.1016/j.agrformet.2021.108615
    Database NAL-Catalogue (AGRICOLA)

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  2. Article: Seasonal and inter-annual variability of the Bowen smith ratio over a semi-arid grassland in the Chinese Loess Plateau

    Ping, Yue / Zhang Qiang / Yang Yang / Liang Zhang / Hongli Zhang / Xiaocui Hao / Xuying Sun

    Agricultural and forest meteorology. 2018 Apr. 15, v. 252

    2018  

    Abstract: ... we describe the seasonal and inter-annual variability of the Bowen ratio (β) over semi-arid grassland ... a large range in precipitation, extending from 555.5 mm (2007) to 262.8 mm (2011). The annual Bowen ratio ...

    Abstract Energy partitioning between grassland sensible (H) and latent (LE) heat fluxes is critical in determining boundary layer development, the hydrological cycle, weather and climate. In this report, we describe the seasonal and inter-annual variability of the Bowen ratio (β) over semi-arid grassland of the Loess Plateau in the north boundary belt of the summer monsoon of China. β was directly measured by an eddy covariance system over a 6-year period (2007–2012), during which the studied grassland experienced a large range in precipitation, extending from 555.5 mm (2007) to 262.8 mm (2011). The annual Bowen ratio (βa) based on annual energy budgets ranged from 0.90 (2007) to 1.93 (2011) with an annual mean value of 1.32, while the annual midday (10:00–16:00 GMT + 8) β ranged from 2.07 (2007) to 4.19 (2011) with an annual mean value of 3.02. The mean midday β during the dry years (3.66, 2009, 2010 and 2011) was higher than that observed during the wet years (2.39, 2007, 2008 and 2012). The 6-year annual mean values of the bulk surface resistance (Rs), aerodynamic resistance (Ra) and climatological resistance (Ri) varied from 272.27 to 410.10 s m−1, 31.62–34.89 s m−1 and from 64.5 to 87.13 s m−1, respectively, with annual mean values of 337.08, 32.83 and 73.05 s m−1, respectively. The normalized difference vegetable index (NDVI) had a direct influence on β as mediated by Rs, and there was a logarithmic function between ET/ETeq and Rs in the semi-arid grassland. A positive trend between β and the surface resistance (Rs*) normalized by the climatological and aerodynamic resistance was observed at this site. Moreover, the annual effective precipitation frequency was significantly related to the midday β during the growing and non-growing seasons, which indicated that the annual effective precipitation, not the annual precipitation, indirectly affected the annual β through its effect on the shallow soil water content (SWC). The results suggested that inter-annual variations in β was primarily controlled by an annual effective precipitation frequency and seasonal variations in β was directly affected by NDVI as mediated by Rs over the semi-arid grassland in the Chinese Loess Plateau.
    Keywords arid lands ; atmospheric precipitation ; climate ; eddy covariance ; energy ; grasslands ; heat transfer ; hydrologic cycle ; monsoon season ; normalized difference vegetation index ; seasonal variation ; soil water ; soil water content ; summer ; vegetables ; China
    Language English
    Dates of publication 2018-0415
    Size p. 99-108.
    Publishing place Elsevier B.V.
    Document type Article
    ZDB-ID 409905-9
    ISSN 0168-1923
    ISSN 0168-1923
    DOI 10.1016/j.agrformet.2018.01.006
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  3. Article: Comparison of three evapotranspiration models to Bowen ratio-energy balance method for a vineyard in an arid desert region of northwest China

    Zhang, B. / Kang, S. / Li, F. / Zhang, L.

    Agricultural and Forest Meteorology, The Netherlands

    2008  Volume 148, Issue 10, Page(s) 1629–1640

    Abstract: Bowen ratio-energy balance; clumping model; evapotranspiration; Penman-Monteith model; Shuttle ...

    Institution China Agricultural Univ., Center for Agricultural Water Research in China, Beijing 100083, People's Republic of China
    Abstract Bowen ratio-energy balance; clumping model; evapotranspiration; Penman-Monteith model; Shuttle-Wallace model; vineyard. [22010]
    Keywords TRANSPIRATION ; VINEYARD ; MODEL ; CHINA
    Language English
    Document type Article
    ZDB-ID 409905-9
    ISSN 0168-1923
    ISSN 0168-1923
    DOI 10.1016/j.agrformet.2008.05.016
    Database Viticulture and Oenology Abstracts

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  4. Article: Comparison of three evapotranspiration models to Bowen ratio-energy balance method for a vineyard in an arid desert region of northwest China

    Zhang, Baozhong / Kang, Shaozhong / Li, Fusheng / Zhang, Lu

    Agricultural and forest meteorology. 2008 Sept. 3, v. 148, no. 10

    2008  

    Abstract: ... evaluated the applicability of the Bowen ratio-energy balance (BREB) method in the arid desert region ... from the arid desert region when the Bowen ratio instrument with higher accuracy was correctly installed ...

    Abstract The accurate determination of vineyard evapotranspiration (ET) in the arid desert region of northwest China is important for allocating irrigation water and improving water use efficiency. Taken a vineyard at the Shiyang river basin of the Hexi corridor of Gansu Province as an example, this study evaluated the applicability of the Bowen ratio-energy balance (BREB) method in the arid desert region of northwest China, simulated the variation of vineyard ET by Penman-Monteith (P-M), Shuttle-Wallace (S-W) and Clumping (C) models in this region and compared the estimated ET by the three models with the measured ET by the BREB. Results indicated that the BREB could provide the accurate measurement of vineyard ET from the arid desert region when the Bowen ratio instrument with higher accuracy was correctly installed. Generally, the variation of the estimated ET from P-M, S-W and C models were similar to that of the measured ET by the BREB method. However, the P-M model overestimated the ET significantly; the estimated ET from the S-W and C models, especially from the C model was approximately equal to the measured ET by the BREB. After a rainfall, the performances of the S-W and C models were also good. Therefore, among the three models, the C model was the optimal model in simulating the vineyard ET in the arid region of northwest China. However, after a frost, the C model significantly overestimated the evapotranspiration because the canopy resistance did not fully reflect the dramatic decrease of grapevine transpiration.
    Keywords arid zones ; deserts ; evapotranspiration ; simulation models ; model validation ; accuracy ; Vitis vinifera ; grapes ; irrigation water ; water use efficiency ; equations ; spatial variation ; frost ; China
    Language English
    Dates of publication 2008-0903
    Size p. 1629-1640.
    Publishing place [Oxford]: Elsevier Science Ltd.
    Document type Article
    ZDB-ID 409905-9
    ISSN 0168-1923
    ISSN 0168-1923
    DOI 10.1016/j.agrformet.2008.05.016
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  5. Article: Estimation of seasonal crop water consumption in a vineyard using Bowen ratio-energy balance method

    Zhang, B.Z / Kang, S.Z / Zhang, L / Du, T.S / Li, S.E / Yang, X.Y

    Hydrological processes. 2007 Dec. 15, v. 21, no. 26

    2007  

    Abstract: ... scheme. Measurements of energy balance components using the Bowen ratio method were made for a complete ... the soil water balance method. It is shown that the Bowen ratio method provided accurate estimates of evapotranspiration ... from the vineyard and this requires that the Bowen ratio system is appropriately installed. The energy balance ...

    Abstract Information about seasonal crop water consumption is useful to develop the appropriate irrigation scheme. Measurements of energy balance components using the Bowen ratio method were made for a complete growing season at a vineyard in the arid region of northwest China. Vine in the experiment was furrow-irrigated using a trellis system. The measured evapotranspiration was compared with estimates using the soil water balance method. It is shown that the Bowen ratio method provided accurate estimates of evapotranspiration from the vineyard and this requires that the Bowen ratio system is appropriately installed. The energy balance components showed typical diurnal pattern with peaks that occurred around the midday, except for the ground heat flux which delayed its peak by 2-3 h. The sensible heat flux was greater than the latent heat flux and followed the net radiation closely. The ratio of the latent heat flux to net radiation was low in the early growing season and increased over time. Under the limited irrigation experienced in the vineyard, the latent heat flux was controlled by available soil moisture and the total evapotranspiration in the growing season was 253 mm. The seasonal progression of the crop coefficient is similar to that reported in the literature, with the maximum occurring during the month of September. The crop coefficient can be estimated as a non-linear function of day of year (DOY) and used to estimate evapotranspiration from vineyards in the region. Copyright © 2007 John Wiley & Sons, Ltd.
    Keywords arid zones ; crop coefficient ; energy balance ; evapotranspiration ; growing season ; heat transfer ; irrigation management ; soil water ; soil water balance ; vineyards ; water use
    Language English
    Dates of publication 2007-1215
    Size p. 3635-3641.
    Publishing place John Wiley & Sons, Ltd.
    Document type Article
    ZDB-ID 1479953-4
    ISSN 1099-1085 ; 0885-6087
    ISSN (online) 1099-1085
    ISSN 0885-6087
    DOI 10.1002/hyp.6568
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  6. Article: Estimation of seasonal crop water consumption in a vineyard using Bowen ratio-energy balance method

    Zhang, B. Z. / Kang, S. Z. / Zhang, L. / Du, T. S. / Li, S. E. / Yang, X. Y.

    Hydrological Processes

    2007  Volume 21, Issue 26, Page(s) 3635–3641

    Abstract: Abstract online at publishers website) ...

    Institution China Agricultural Univ., Center for Agricultural Water Research, Beijing 100083, P.R. of China
    Abstract (Abstract online at publishers website)
    Keywords WATER ; TRANSPIRATION ; MODEL ; IRRIGATION
    Language English
    Document type Article
    ZDB-ID 1479953-4
    ISSN 1099-1085 ; 0885-6087
    ISSN (online) 1099-1085
    ISSN 0885-6087
    DOI 10.1002/hyp.6568
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  7. Article ; Online: Psychometric properties of the Drug Use Disorders Identification Test (DUDIT) and prevalence of drug use among SA site-based construction workers.

    Bowen, Paul / Zhang, Rita Peihua

    Psychology, health & medicine

    2022  , Page(s) 1–12

    Abstract: Construction workers in South Africa are an at-risk group for HIV/AIDS. Substance misuse, other than alcohol, is associated with poor decision-making, risky lifestyle behaviour, and non-use of condoms. Substance misuse is also associated with harmful and ...

    Abstract Construction workers in South Africa are an at-risk group for HIV/AIDS. Substance misuse, other than alcohol, is associated with poor decision-making, risky lifestyle behaviour, and non-use of condoms. Substance misuse is also associated with harmful and hazardous alcohol consumption and depression. The Drug Use Disorders Identification Test (DUDIT) is a widely used screening tool to detect drug abuse. The present study examines both the psychometric properties of the DUDIT and the prevalence of drug abuse among construction workers. A field study involving 496 male workers at 18 construction sites of seven construction companies in the Western Cape province of South Africa, was undertaken. Descriptive statistics, reliability, and exploratory and confirmatory factor analyses were used to determine the prevalence of substance use, and the dimensionality, reliability and construct validity of the DUDIT. Approximately 10% of participants reported some form of substance use. Four hundred and sixty-seven employees (94.2%) were determined not to have drug-related problems (DUDIT score < 6). Of the at-risk employees (score >5), 5.0% (
    Language English
    Publishing date 2022-07-21
    Publishing country England
    Document type Journal Article
    ZDB-ID 1477841-5
    ISSN 1465-3966 ; 1354-8506
    ISSN (online) 1465-3966
    ISSN 1354-8506
    DOI 10.1080/13548506.2022.2103160
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article ; Online: Effect of Er/Y addition on the growth and superconductivity of Bi2212 films.

    Zhang, Bowen / Qi, Yang

    RSC advances

    2023  Volume 13, Issue 25, Page(s) 17253–17263

    Abstract: In order to increase the critical current density of Bi2212 superconducting films to broaden their application areas. A series of ... ...

    Abstract In order to increase the critical current density of Bi2212 superconducting films to broaden their application areas. A series of Bi
    Language English
    Publishing date 2023-06-08
    Publishing country England
    Document type Journal Article
    ISSN 2046-2069
    ISSN (online) 2046-2069
    DOI 10.1039/d3ra02397d
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article ; Online: Right trilobectomy hepatic in a 3-month-old infant: An unusual case report.

    Zhang, Guofeng / Hu, Bowen / Guo, Fei / Yang, Heying

    Asian journal of surgery

    2023  Volume 46, Issue 11, Page(s) 5227–5228

    MeSH term(s) Humans ; Infant ; Liver/surgery
    Language English
    Publishing date 2023-07-19
    Publishing country Netherlands
    Document type Case Reports ; Letter
    ZDB-ID 1068461-x
    ISSN 0219-3108 ; 1015-9584
    ISSN (online) 0219-3108
    ISSN 1015-9584
    DOI 10.1016/j.asjsur.2023.07.031
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  10. Article ; Online: Correction: Polydopamine-assisted aptamer-carrying tetrahedral DNA microelectrode sensor for ultrasensitive electrochemical detection of exosomes.

    Jiang, Bowen / Zhang, Tenghua / Liu, Silan / Sheng, Yan / Hu, Jiaming

    Journal of nanobiotechnology

    2024  Volume 22, Issue 1, Page(s) 82

    Language English
    Publishing date 2024-02-28
    Publishing country England
    Document type Published Erratum
    ZDB-ID 2100022-0
    ISSN 1477-3155 ; 1477-3155
    ISSN (online) 1477-3155
    ISSN 1477-3155
    DOI 10.1186/s12951-024-02347-1
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