Coupling the Soil-Vegetation-Atmosphere-Transfer Scheme ORCHIDEE to the agronomy model STICS to study the influence of croplands on the European carbon and water budgets
Coupling the Soil-Vegetation-Atmosphere-Transfer Scheme ORCHIDEE to the agronomy model STICS to study the influence of croplands on the European carbon and water budgets
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DOI：
10.1051/agro:2004038
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发表时间：
2004-09-01
期刊：
影响因子：
--
通讯作者：
Perrier, A
中科院分区：
文献类型：
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作者：
de Noblet-Ducoudré, N;Gervois, S;Perrier, A
在与气候模式耦合的陆面模式中，农业仍然以非常简单的方式被考虑在内，而根据未来的设想，农业所占的面积在下个世纪将大大增加。为了改善全球植被模式ORCHIDEE（可与IPSL 1气候模式耦合）中农田的代表性，我们（1）开发了一个同化由详细作物模式STICS模拟的一些变量的程序，（2）修改了一些参数化，以避免ORCHIDEE中同化和计算变量之间的不一致。现场模拟表明，季节性的农田-大气通量的水，能量和CO2的强烈修改时，更现实的农作物参数化引入兰花。对西欧小麦和玉米农田的更现实的描述导致了夏末和秋季大气层的干燥，而土壤仍然较湿，特别是在冬季作物播种的时候。CO2净吸收通量的季节性也增强和缩短。
Agriculture is still accounted for in a very simplistic way in the land-surface models which are coupled to climate models, while the area it occupies will significantly increase in the next century according to future scenarios. In order to improve the representation of croplands in a Dynamic Global Vegetation Model named ORCHIDEE (which can be coupled to the IPSL1 climate model), we have (1) developed a procedure which assimilates some of the variables simulated by a detailed crop model, STICS, and (2) modified some parameterisations to avoid inconsistencies between assimilated and computed variables in ORCHIDEE. Site simulations show that the seasonality of the cropland-atmosphere fluxes of water, energy and CO2 is strongly modified when more realistic crop parameterisations are introduced in ORCHIDEE. A more realistic representation of wheat and corn croplands over Western Europe leads to a drying out of the atmosphere at the end of summer and during autumn, while the soils remain wetter, specially at the time when winter crops are sowed. The seasonality of net CO2 uptake fluxes is also enhanced and shortened.