Contribution of disturbance to increasing seasonal amplitude of atmospheric CO2
Contribution of disturbance to increasing seasonal amplitude of atmospheric CO2
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DOI：
10.1126/science.284.5422.1973
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发表时间：
1999-06
期刊：
影响因子：
56.9
通讯作者：
S. Zimov;S. P. Davidov;G. M. Zimova;A. I. Davidova;F. S. Chapin;M. Chapin;James F. Reynolds
中科院分区：
文献类型：
--
作者：
S. Zimov;S. P. Davidov;G. M. Zimova;A. I. Davidova;F. S. Chapin;M. Chapin;James F. Reynolds
最近高纬度大气二氧化碳（CO2）的季节性幅度增加表明，生物圈对高纬度变暖作出了广泛的反应。北方西伯利亚生态系统的净生态系统碳交换的季节性幅度被证明是更大的干扰比不受干扰的网站，由于夏季流入量增加，冬季流出量增加。因此，扰动的增加可能大大有助于高纬度地区大气二氧化碳季节循环的扩大。温暖的温度减少了夏季的碳流入，这表明，高纬度变暖，如果发生，将不太可能增加季节性的碳交换幅度。
Recent increases in the seasonal amplitude of atmospheric carbon dioxide (CO2) at high latitudes suggest a widespread biospheric response to high-latitude warming. The seasonal amplitude of net ecosystem carbon exchange by northern Siberian ecosystems is shown to be greater in disturbed than undisturbed sites, due to increased summer influx and increased winter efflux. Increased disturbance could therefore contribute significantly to the amplified seasonal cycle of atmospheric carbon dioxide at high latitudes. Warm temperatures reduced summer carbon influx, suggesting that high-latitude warming, if it occurred, would be unlikely to increase seasonal amplitude of carbon exchange.