Terrestrial biosphere changes over the last 120 kyr
Terrestrial biosphere changes over the last 120 kyr
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DOI：
10.5194/cp-12-51-2016
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发表时间：
2016-01-01
影响因子：
4.3
通讯作者：
Tzedakis, C.
中科院分区：
文献类型：
--
作者：
Hoogakker, B. A. A.;Smith, R. S.;Tzedakis, C.
介绍了一个新的全球长期（>40 kyr）花粉数据记录的合成和生物化，并与HadCM 3和FAMOUS气候模式以及BIOME 4植被模式的模拟一起用于分析末次冰期-间冰期循环期间全球陆地生物圈和碳储存的动态。随着时间的推移，在全球范围内使用BIOME 4驱动的HadCM 3和FAMOUS模拟生物群落分布通常与从花粉数据推断的生物群落分布一致。全球平均面积的草原和干燥的灌木丛，沙漠和苔原生物群落显示大规模的增加，在末次盛冰期，约。64和74 ka BP和海洋同位素阶段5的冷亚阶段，在热带森林，暖温带森林，温带森林生物群系的代价。BIOME 4对全球净初级生产力的模拟反映了这些变化，表明两个模型之间有很好的一致性。这种变化可能会影响陆地碳储存，这反过来又影响海水的稳定碳同位素组成，因为陆地碳在C-13中耗尽。
A new global synthesis and biomization of long (>40 kyr) pollen-data records is presented and used with simulations from the HadCM3 and FAMOUS climate models and the BIOME4 vegetation model to analyse the dynamics of the global terrestrial biosphere and carbon storage over the last glacial-interglacial cycle. Simulated biome distributions using BIOME4 driven by HadCM3 and FAMOUS at the global scale over time generally agree well with those inferred from pollen data. Global average areas of grassland and dry shrubland, desert, and tundra biomes show large-scale increases during the Last Glacial Maximum, between ca. 64 and 74 ka BP and cool substages of Marine Isotope Stage 5, at the expense of the tropical forest, warm-temperate forest, and temperate forest biomes. These changes are reflected in BIOME4 simulations of global net primary productivity, showing good agreement between the two models. Such changes are likely to affect terrestrial carbon storage, which in turn influences the stable carbon isotopic composition of seawater as terrestrial carbon is depleted in C-13.