Comparing global models of terrestrial net primary productivity (NPP): overview and key results
Comparing global models of terrestrial net primary productivity (NPP): overview and key results
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DOI：
10.1046/j.1365-2486.1999.00009.x
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发表时间：
1999-04-01
影响因子：
11.6
通讯作者：
Schloss, AL
中科院分区：
文献类型：
--
作者：
Cramer, W;Kicklighter, DW;Schloss, AL
对17个全球陆地生态地球化学模式的陆地生物圈净初级生产力（NPP）的年通量和季节通量进行了比较。这项比较由IGBP-GAIM/DIS/GCTE赞助，尽可能使用标准化输入变量，通过两个国际讲习班和因特网进行。这些模式在复杂性和最初目的方面差别很大，但可分为三大类：基于卫星的模型，使用来自NOAA/AVHRR传感器的数据作为其主要输入流（CASA、GLO-PEM、SDBM、SIB 2和TURC），使用规定的植被结构模拟碳通量的模型（BIOME-BGC、CARAIB 2.1、世纪4.0、FBM 2.2、HRBM 3.0、KGBM、PLAI 0.2、SILVAN 2.2和TEM 4.0）以及模拟植被结构和碳通量的模型（BIOME 3、DOLY和HYBRID 3.0）。在去除两个异常值（由于比较而产生极端结果作为伪影）后，模拟得出了一系列总NPP值（44.4-66.3 Pg C年（-1））。NPP的全球分布格局和年NPP与主要气候变量的关系在大多数地区是一致的。差异不能归因于基本的建模策略，除了营养素的限制一般产生较低的净初级生产力。区域和全球NPP对水平衡模拟方法敏感。在全球和地方两级，模型之间的季节性变化很大，这为某些模型的具体缺陷提供了一些迹象。
Seventeen global models of terrestrial biogeochemistry were compared with respect to annual and seasonal fluxes of net primary productivity (NPP) for the land biosphere. The comparison, sponsored by IGBP-GAIM/DIS/GCTE, used standardized input variables wherever possible and was carried out through two international workshops and over the Internet. The models differed widely in complexity and original purpose, but could be grouped in three major categories: satellite-based models that use data from the NOAA/AVHRR sensor as their major input stream (CASA, GLO-PEM, SDBM, SIB2 and TURC), models that simulate carbon fluxes using a prescribed vegetation structure (BIOME-BGC, CARAIB 2.1, CENTURY 4.0, FBM 2.2 HRBM 3.0, KGBM, PLAI 0.2, SILVAN 2.2 and TEM 4.0), and models that simulate both vegetation structure and carbon fluxes (BIOME3, DOLY and HYBRID 3.0). The simulations resulted in a range of total NPP values (44.4-66.3 Pg C year(-1)), after removal of two outliers (which produced extreme results as artefacts due to the comparison). The broad global pattern of NPP and the relationship of annual NPP to the major climatic variables coincided in most areas. Differences could not be attributed to the fundamental modelling strategies, with the exception that nutrient constraints generally produced lower NPP. Regional and global NPP were sensitive to the simulation method for the water balance. Seasonal variation among models was high, both globally and locally, providing several indications for specific deficiencies in some models.