globalchange  > 气候变化事实与影响
DOI: 10.5194/hess-18-5001-2014
Scopus记录号: 2-s2.0-84916623767
论文题名:
Building a field- and model-based climatology of local water and energy cycles in the cultivated Sahel - Annual budgets and seasonality
作者: Velluet C; , Demarty J; , Cappelaere B; , Braud I; , Issoufou H; B; -A; , Boulain N; , Ramier D; , Mainassara I; , Charvet G; , Boucher M; , Chazarin J; -P; , Oï M; , Yahou H; , Maidaji B; , Arpin-Pont F; , Benarrosh N; , Mahamane A; , Nazoumou Y; , Favreau G; , Seghieri J
刊名: Hydrology and Earth System Sciences
ISSN: 10275606
出版年: 2014
卷: 18, 期:12
起始页码: 5001
结束页码: 5024
语种: 英语
Scopus关键词: Blending ; Budget control ; Climate models ; Computer simulation ; Cultivation ; Digital storage ; Evapotranspiration ; Land use ; Runoff ; Surface measurement ; Time series ; Transpiration ; Annual evapotranspirations ; Atmosphere modeling ; Land productivities ; Mechanistic modeling ; Multivariate time series ; Sampling uncertainties ; Seasonal distributions ; Water and energy fluxes ; Data integration ; annual variation ; climatology ; cultivation ; energy budget ; energy flux ; evapotranspiration ; field survey ; land cover ; land surface ; regional climate ; seasonality ; water budget ; water flow ; water resource ; Sahel [Sub-Saharan Africa]
英文摘要: In the sub-Saharan Sahel, energy and water cycling at the land surface is pivotal for the regional climate, water resources and land productivity, yet it is still very poorly documented. As a step towards a comprehensive climatological description of surface fluxes in this area, this study provides estimates of long-term average annual budgets and seasonal cycles for two main land use types of the cultivated Sahelian belt: rainfed millet crop and fallow bush. These estimates build on the combination of a 7-year field data set from two typical plots in southwestern Niger with detailed physically based soil-plant-atmosphere modeling, yielding a continuous, comprehensive set of water and energy flux and storage variables over this multiyear period. In the present case in particular, blending field data with mechanistic modeling makes the best use of available data and knowledge for the construction of the multivariate time series. Rather than using the model only to gap-fill observations into a composite series, model-data integration is generalized homogeneously over time by generating the whole series with the entire data-constrained model simulation. Climatological averages of all water and energy variables, with associated sampling uncertainty, are derived at annual to subseasonal scales from the time series produced. Similarities and differences in the two ecosystem behaviors are highlighted. Mean annual evapotranspiration is found to represent ∼82-85% of rainfall for both systems, but with different soil evaporation/plant transpiration partitioning and different seasonal distribution. The remainder consists entirely of runoff for the fallow, whereas drainage and runoff stand in a 40-60% proportion for the millet field. These results should provide a robust reference for the surface energy- and water-related studies needed in this region. Their significance and the benefits they gain from the innovative data-model integration approach are thoroughly discussed. The model developed in this context has the potential for reliable simulations outside the reported conditions, including changing climate and land cover. © Author(s) 2014.
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/78050
Appears in Collections:气候变化事实与影响

Files in This Item:

There are no files associated with this item.


作者单位: Université Montpellier 2, UMR HSM (CNRS/IRD/UM1/UM2), Montpellier, France; IRD, UMR HSM (CNRS/IRD/UM1/UM2), Montpellier, France; IRSTEA, Unit HHLY, Lyon, France; Université de Maradi, Biology Department, Maradi, Niger; Cerema, DTer IDF, Trappes-en-Yvelines, France; IRD, UMR HSM (CNRS/IRD/UM1/UM2), Niamey, Niger; Université Abdou Moumouni, Geology Department, Niamey, Niger; IRD, LTHE, Grenoble, France; CNRS, UMR HSM (CNRS/IRD/UM1/UM2), Montpellier, France

Recommended Citation:
Velluet C,, Demarty J,, Cappelaere B,et al. Building a field- and model-based climatology of local water and energy cycles in the cultivated Sahel - Annual budgets and seasonality[J]. Hydrology and Earth System Sciences,2014-01-01,18(12)
Service
Recommend this item
Sava as my favorate item
Show this item's statistics
Export Endnote File
Google Scholar
Similar articles in Google Scholar
[Velluet C]'s Articles
[, Demarty J]'s Articles
[, Cappelaere B]'s Articles
百度学术
Similar articles in Baidu Scholar
[Velluet C]'s Articles
[, Demarty J]'s Articles
[, Cappelaere B]'s Articles
CSDL cross search
Similar articles in CSDL Cross Search
[Velluet C]‘s Articles
[, Demarty J]‘s Articles
[, Cappelaere B]‘s Articles
Related Copyright Policies
Null
收藏/分享
所有评论 (0)
暂无评论
 

Items in IR are protected by copyright, with all rights reserved, unless otherwise indicated.