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CO2 partial pressure and fluxes in the Amazon River plume using in situ and remote sensing data
Continental Shelf Research ( IF 2.1 ) Pub Date : 2021-01-13 , DOI: 10.1016/j.csr.2021.104348
Aline M. Valerio , Milton Kampel , Nicholas D. Ward , Henrique O. Sawakuchi , Alan C. Cunha , Jeffrey E. Richey

Estimations of the global carbon budget include a quantitative understanding of the evolving processes that occur along river-to-ocean gradients. However, high spatiotemporal resolution observations of these processes are limited. Here we present in situ measurements of the partial pressure of CO2 (pCO2) made through the Amazon River plume (ARP) during different discharge seasons, from 2010 to 2012. We evaluated the spatiotemporal distribution of pCO2 using Soil Moisture and Ocean Salinity (SMOS) satellite observations for each hydrologic period in the ARP. Regression models were used to estimate pCO2 at the ARP for the period of 2010–2014. From these distributions we calculated sea-air gas exchange of CO2 between the plume waters and the atmosphere (Fco2sea). Intra-annual variability of Fco2sea was related to discharge at the river mouth and ocean currents as well as trade winds in the plume. Climatic events during the study period had a significant impact on the Fco2sea. Including the plume area closer to the river mouth makes the ARP a net source of CO2 with an annual net sea-air flux of 8.6 ± 7.1 Tg C y−1 from 2011 to 2014.



中文翻译:

使用原位和遥感数据的亚马逊河烟流中的CO 2分压和通量

全球碳预算的估算包括对沿河流到海洋的梯度变化过程的定量理解。但是,这些过程的高时空分辨率观察结果有限。在这里,我们介绍了从2010年到2012年在不同排放季节通过亚马逊河烟流(ARP)进行的CO 2pC O 2)分压的原位测量。我们使用土壤湿度和湿度来评估pC O 2的时空分布。ARP中每个水文时期的海洋盐度(SMOS)卫星观测。回归模型用于估计pC O 2在ARP的2010-2014年期间。根据这些分布,我们计算出了羽状水和大气之间的CO 2海气交换(F合作2)。的年内变化F合作2与河口和洋流的排放以及羽流中的顺风有关。研究期间的气候事件对F合作2。从2011年到2014年,ARP包括更靠近河口的羽流区域,使ARP成为CO 2的净来源,年净海气通量为8.6±7.1 Tg C y -1

更新日期:2021-01-22
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