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Carbon Dioxide Uptake by a Temperate Tidal Sea

机译：温带潮汐海域吸收二氧化碳

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Carbon dioxide (CO2) exchange between the atmosphere and the Wadden Sea, a shallow coastal region along the northern Netherlands, has been measured from April 2006 onwards on a tidal flat and over open water. Tidal flat measurements were done using a flux chamber, and ship borne measurements using an equilibrator to determine the partial pressure of CO2 in the water. A strong response of CO2 exchange rate on irradiance changes was observed at the tidal flat surface, with generally strong uptake of CO2 during daylight conditions and release, presumably due to respiration, during dark conditions. The rate of respiration appeared to increase with temperature. Daytime CO2 uptake tended to be higher than nighttime release all year round. Apparently, tidal flats in temperate regions of the globe may be a sink for CO2 on an annual basis. In contrast to terrestrial CO2 exchange, uptake by processes active on and in tidal flats responds only slowly to changing irradiance. This slow reaction is attributed to CO2 storage in wet soil. Measurements in the water between tidal flats suggest that the estuarine, open water part of the Wadden Sea is a source of CO2 in spring.
机译：从2006年4月起，在潮滩和开阔水域上测量了大气与瓦登海（瓦登海）之间的二氧化碳交换，瓦登海是荷兰北部沿岸的一个浅海沿海地区。使用通量室进行潮汐平面测量，并使用平衡器进行船载测量，以确定水中CO2的分压。在潮汐平面上观察到了CO2交换速率对辐照度变化的强烈响应，在白天条件下通常会大量吸收CO2，而在黑暗条件下则可能是由于呼吸作用而释放。呼吸速率似乎随着温度的升高而增加。全年的白天二氧化碳吸收量往往高于夜间释放的二氧化碳。显然，全球温带地区的潮汐带每年可能吸收二氧化碳。与陆地上的CO2交换相反，活跃在滩涂上和滩涂中的过程对辐照度的变化反应缓慢。这种缓慢的反应归因于二氧化碳在潮湿土壤中的储存。对潮滩之间的水进行的测量表明，瓦登海的河口，开放水域部分是春季的CO2来源。

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