ARCTIC LAKES AND STREAMS AS GAS CONDUITS TO THE ATMOSPHERE - IMPLICATIONS FOR TUNDRA CARBON BUDGETS
ARCTIC LAKES AND STREAMS AS GAS CONDUITS TO THE ATMOSPHERE - IMPLICATIONS FOR TUNDRA CARBON BUDGETS
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DOI：
10.1126/science.251.4991.298
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发表时间：
1991-01-18
期刊：
影响因子：
56.9
通讯作者：
MILLER, MC
中科院分区：
文献类型：
--
作者：
KLING, GW;KIPPHUT, GW;MILLER, MC
北极苔原储存了大量的碳，被认为是大气中二氧化碳（CO2）的汇（每年0.1至0.3 Petagram的碳）（1 Petagram = 10（15）克）。 但这种碳平衡的估计仅适用于陆地生态系统。 对阿拉斯加北极地区29个水生生态系统中二氧化碳分压的测量表明，在大多数情况下（29个中的27个），二氧化碳被释放到大气中。 这种CO2可能起源于陆地环境;颗粒碳的侵蚀加上冻土带溶解碳的地下水运输有助于CO2从地表沃茨到大气的通量。 如果这种机制是其他苔原地区的典型机制，那么目前对北极陆地大气CO2汇的估计可能高出20%。
Arctic tundra has large amounts of stored carbon and is thought to be a sink for atmospheric carbon dioxide (CO2) (0.1 to 0.3 petagram of carbon per year) (1 petagram = 10(15) grams). But this estimate of carbon balance is only for terrestrial ecosystems. Measurements of the partial pressure of CO2 in 29 aquatic ecosystems across arctic Alaska showed that in most cases (27 of 29) CO2 was released to the atmosphere. This CO2 probably originates in terrestrial environments; erosion of particulate carbon plus ground-water transport of dissolved carbon from tundra contribute to the CO2 flux from surface waters to the atmosphere. If this mechanism is typical of that of other tundra areas, then current estimates of the arctic terrestrial sink for atmospheric CO2 may be 20 percent too high.