随季节变化的河流溶解无机氮全球综合模拟框架

IF 0.6 Q4 WATER RESOURCES
Yizhou Huang, Daisuke Tokuda, Xudong Zhou, T. Oki
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引用次数: 2

摘要

了解人类活动导致地表水中过量营养物质的模式和季节变化对污染控制具有重要意义。在这项研究中,我们开发了一个综合的生物地球化学模型框架,用于大气、土地和水生生态系统之间的氮交换。在与人类活动相关的多个氮源的驱动下,陆地表面模型、地下氮循环模型和河流水动力模型合并了河流温度模型。在考虑季节变化的情况下,我们估计了全球河流中氮的负荷和运输,并验证了所提出模型的可靠性。总溶解无机氮(DIN)流量随河流而累积,即使在人口密度低但流域面积大的地区,如高纬度地区,其总DIN负荷也很高。该研究成功地改进了考虑季节变化的全球尺度氮负荷估算。我们的结果显示了与全球河流中DIN浓度观测数据一致的趋势,其中所有上述变量都受到季节变化的极大影响。结果还反映了氮输入的月变化有助于产生与观测值更接近的DIN浓度估计,这可能会强调需要进一步研究人为排放的季节变化。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Global integrated modeling framework of riverine dissolved inorganic nitrogen with seasonal variation
: Understanding patterns and seasonal variations of exces‐ sive nutrients in surface water from anthropogenic activi‐ ties is important for pollution control. In this study, we developed an integrated biogeochemical modeling frame‐ work for nitrogen exchanges among the atmosphere, terres‐ trial, and aquatic ecosystems. A land surface model, a ter‐ restrial nitrogen cycle model, and a riverine hydrodynamics model incorporated with a river temperature model were consolidated and driven by multiple nitrogen sources related to anthropogenic activities. We estimated the global nitrogen loading and transporting in global rivers, with con‐ sideration of seasonal variations, and the validation demon‐ strates the reliability of the proposed model. The total dis‐ solved inorganic nitrogen (DIN) flow rate is accumulated following rivers and it has high total DIN loads even in regions with low population density but large basin area, such as those at high latitudes. This study successfully improves estimation of nitrogen loading on global scale with consideration of seasonal variation. Our results show consistent trends with the observed data of DIN concentra‐ tions in global rivers, where all above variables are greatly affected by seasonal variations. The results also reflect the monthly-variant nitrogen inputs help produce closer DIN concentration estimates to observations, which will possi‐ bly stress the need for further study on seasonal variability of anthropogenic emissions.
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来源期刊
CiteScore
1.90
自引率
18.20%
发文量
9
审稿时长
10 weeks
期刊介绍: Hydrological Research Letters (HRL) is an international and trans-disciplinary electronic online journal published jointly by Japan Society of Hydrology and Water Resources (JSHWR), Japanese Association of Groundwater Hydrology (JAGH), Japanese Association of Hydrological Sciences (JAHS), and Japanese Society of Physical Hydrology (JSPH), aiming at rapid exchange and outgoing of information in these fields. The purpose is to disseminate original research findings and develop debates on a wide range of investigations on hydrology and water resources to researchers, students and the public. It also publishes reviews of various fields on hydrology and water resources and other information of interest to scientists to encourage communication and utilization of the published results. The editors welcome contributions from authors throughout the world. The decision on acceptance of a submitted manuscript is made by the journal editors on the basis of suitability of subject matter to the scope of the journal, originality of the contribution, potential impacts on societies and scientific merit. Manuscripts submitted to HRL may cover all aspects of hydrology and water resources, including research on physical and biological sciences, engineering, and social and political sciences from the aspects of hydrology and water resources.
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