Reconciling carbon-cycle processes from ecosystem to global scales.

Reconciling carbon-cycle processes from ecosystem to global scales.
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从生态系统到全球尺度的碳循环过程。

DOI:
10.1002/fee.2296
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发表时间:
2021-03
影响因子:
10.3
通讯作者:
--
中科院分区:
环境科学与生态学1区
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--
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了解从生态系统到全球尺度的碳(C)动态仍然是一个挑战。虽然全球二氧化碳(CO2)观测站的扩大使得从生态系统到全球尺度的碳循环过程的估计成为可能,但这些估计并不一定一致。在美国大陆尺度上,只有5%的通过光合作用固定的C保持为净生态系统交换(NEE),但生态系统测量表明,只有2%的固定C保持在草原中,而高达30%保持在针叶林中。湿润温暖的东南部具有最高的总初级生产力,相对湿润凉爽的中西部具有最高的NEE,这表明重要的空间不匹配。新获得的卫星和大气数据可以以创新的方式结合起来,以确定潜在的碳损失途径,以调和这些空间不匹配。从陆地和水生环境中编译的独立数据集现在可以结合起来,以推进陆地-水界面的碳循环科学。
Understanding carbon (C) dynamics from ecosystem to global scales remains a challenge. Although expansion of global carbon dioxide (CO2) observatories makes it possible to estimate C‐cycle processes from ecosystem to global scales, these estimates do not necessarily agree. At the continental US scale, only 5% of C fixed through photosynthesis remains as net ecosystem exchange (NEE), but ecosystem measurements indicate that only 2% of fixed C remains in grasslands, whereas as much as 30% remains in needleleaf forests. The wet and warm Southeast has the highest gross primary productivity and the relatively wet and cool Midwest has the highest NEE, indicating important spatial mismatches. Newly available satellite and atmospheric data can be combined in innovative ways to identify potential C loss pathways to reconcile these spatial mismatches. Independent datasets compiled from terrestrial and aquatic environments can now be combined to advance C‐cycle science across the land–water interface.
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