内陆河流的二氧化碳供应量由溶解有机碳驱动，而非气候变暖：底格里斯河案例研究

IF 1.2 Q3 MULTIDISCIPLINARY SCIENCES

Baghdad Science Journal Pub Date : 2023-11-19 DOI:10.21123/bsj.2023.9009

Batool Kadhim, Mohammed Hamdan

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引用次数: 0

摘要

河流中的二氧化碳（CO2）已达到过饱和状态，因此它们在全球碳预算中发挥着至关重要的作用。为了加深对河流中二氧化碳供应来源的了解，我们研究了气候变化对二氧化碳供应的影响，即 "溶解有机碳（DOC）和气候变暖"。我们在秋冬季节对巴格达底格里斯河 3 个部分的 45 个地点进行了采样。结果表明，所有研究变量（水温、pH 值、溶解有机碳、二氧化碳）都随时间发生了变化。二氧化碳供应量的变化与溶解氧浓度的变化有关，而与水温无关。总之，我们的研究结果表明，河流中二氧化碳浓度升高可能是 DOC 输入量增加的结果。因此，我们可以得出结论，河流中 DOC 浓度的增加是微生物呼吸和光矿化所必需的，而微生物呼吸和光矿化是河流生态系统中二氧化碳的主要来源。

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Carbon Dioxide Availability in Inlands Rivers Is Driven by Dissolved Organic Carbon, Not Warming: A Case Study of Tigris River

Rivers became supersaturated with carbon dioxide (CO2), so they play an essential role in the global carbon budgets. To increase our understanding of the source of CO2 availability in rivers, we studied the role of climate-changed drivers of CO2 availability, which are ‘‘dissolved organic carbon (DOC), and warming’’. We sampled 45 locations of 3 parts within the Tigris River in Baghdad during autumn and winter. The results showed that all the studied variables (water temperature, pH, DOC, CO2) changed over time. The variations in CO2 availability are associated with changes in DOC concentration, not with water temperature. Overall, our results suggest that elevated CO2 in rivers could result from increased DOC inputs. Therefore, we can conclude that increased DOC concentration in rivers was required for microbial respiration and photo-mineralization, which are the primary sources of CO2 in river ecosystems.

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来源期刊

Baghdad Science Journal MULTIDISCIPLINARY SCIENCES-

CiteScore

2.00

自引率

50.00%

发文量

102

审稿时长

24 weeks

期刊介绍： The journal publishes academic and applied papers dealing with recent topics and scientific concepts. Papers considered for publication in biology, chemistry, computer sciences, physics, and mathematics. Accepted papers will be freely downloaded by professors, researchers, instructors, students, and interested workers. ( Open Access) Published Papers are registered and indexed in the universal libraries.