Arid
DOI10.1016/j.jhydrol.2024.131595
Contrasting responses of water use efficiency to increasing aridity in alpine shrubs: A modelling perspective
Su, Menglin; Yan, Ke; Wang, Xiangfu; Jin, Jiaxin; Li, Yuanhui; Dong, Wenting; Li, Haikui; Lu, Jun; Zhao, Chuanchuan; Wang, Weifeng
通讯作者Wang, WF
来源期刊JOURNAL OF HYDROLOGY
ISSN0022-1694
EISSN1879-2707
出版年2024
卷号639
英文摘要Water use efficiency (WUE), which is strongly related to carbon and water cycles, is crucial for maintaining fragile and sensitive alpine ecosystems. An accurate assessment of the spatial and temporal variations in WUE among alpine shrubs under different aridity levels is essential for quantifying the carbon and water balance in alpine environments. We calibrated the Biome-BGC model using the parameter estimation (PEST) approach with one year of data from an eddy covariance tower and validated the model against three years of carbon-water flux and carbon storage data from 80 biomass sampling sites in Qinghai Province, China. We then simulated the carbon and water cycles of alpine shrubs in Qinghai Province from 1980 to 2019. Using meteorological data from the study area, we analyzed the spatiotemporal variations and factors influencing WUE in regions with different aridity levels. The results showed that after optimization using the PEST approach, the mean absolute error (MAE) and root mean square error (RMSE) of gross primary productivity (GPP) decreased by 0.58 and 1.05 g C m- 2 d-1, respectively, and those of evapotranspiration (ET) decreased by 0.41 and 0.77 mm d-1, respectively. Spatial distribution analysis revealed that the annual mean GPP and ET generally decreased from southeast to northwest in the order of humid, subhumid, semi-arid, arid, and hyper-arid climate regions. In other regions, WUE exhibited a biphasic trend with the aridity index, decreasing under severe dryness but increasing as aridity increased. The primary controlling factor in humid and sub-humid regions is the mean annual temperature, whereas in arid and semi-arid regions it is the mean annual precipitation. These findings are critical for improving the prediction of carbon sequestration and water-holding capacity of alpine shrublands under drought conditions.
英文关键词Meteorological factors Carbon -water coupling Process-based model Aridity index Alpine shrublands Water use efficiency
类型Article
语种英语
收录类别SCI-E
WOS记录号WOS:001267791900001
WOS关键词TERRESTRIAL ECOSYSTEMS ; TIBETAN PLATEAU ; EVAPOTRANSPIRATION ; CARBON ; DROUGHT ; CLIMATE ; TEMPERATURE ; ENVIRONMENT ; FLUXES ; MODIS
WOS类目Engineering, Civil ; Geosciences, Multidisciplinary ; Water Resources
WOS研究方向Engineering ; Geology ; Water Resources
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/404597
推荐引用方式
GB/T 7714
Su, Menglin,Yan, Ke,Wang, Xiangfu,et al. Contrasting responses of water use efficiency to increasing aridity in alpine shrubs: A modelling perspective[J],2024,639.
APA Su, Menglin.,Yan, Ke.,Wang, Xiangfu.,Jin, Jiaxin.,Li, Yuanhui.,...&Wang, Weifeng.(2024).Contrasting responses of water use efficiency to increasing aridity in alpine shrubs: A modelling perspective.JOURNAL OF HYDROLOGY,639.
MLA Su, Menglin,et al."Contrasting responses of water use efficiency to increasing aridity in alpine shrubs: A modelling perspective".JOURNAL OF HYDROLOGY 639(2024).
条目包含的文件
条目无相关文件。
个性服务
推荐该条目
保存到收藏夹
导出为Endnote文件
谷歌学术
谷歌学术中相似的文章
[Su, Menglin]的文章
[Yan, Ke]的文章
[Wang, Xiangfu]的文章
百度学术
百度学术中相似的文章
[Su, Menglin]的文章
[Yan, Ke]的文章
[Wang, Xiangfu]的文章
必应学术
必应学术中相似的文章
[Su, Menglin]的文章
[Yan, Ke]的文章
[Wang, Xiangfu]的文章
相关权益政策
暂无数据
收藏/分享

除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。