<dd id="rw0xn"></dd>

  • <label id="rw0xn"></label>

  • <sup id="rw0xn"><strike id="rw0xn"></strike></sup><label id="rw0xn"></label>
      <th id="rw0xn"></th>
    1. <var id="rw0xn"></var>
        1. <table id="rw0xn"></table>

          <sub id="rw0xn"><meter id="rw0xn"></meter></sub>

          Global Monitoring of Nitrogen Isotopes in Atmospheric Waters

          Closed for proposals

          Project Type

          Coordinated Research Project

          Project Code

          F32008

          CRP

          2209

          Approved Date

          7 December 2017

          Status

          Closed

          Start Date

          28 May 2018

          Expected End Date

          30 June 2023

          Completed Date

          7 March 2023

          Participating Countries

          Australia
          Belgium
          Brazil
          China
          Costa Rica
          Cuba
          Estonia
          Ghana
          Greece
          India
          Italy
          Kenya
          Singapore
          Sri Lanka
          Thailand
          United States of America
          Viet Nam

          Description

          The increasing production of food and energy worldwide has multiplied today's anthropogenic emissions of nitrogen compounds in the atmosphere, which are transported and deposited through precipitation on the terrestrial and aquatic systems. Disruption of N-balance, eutrophication in rivers and lakes, and stream acidification are a few of the negative consequences, when N-deposition exceeds the remediation capacity or critical load of the aquatic system. Environmental isotopes have been widely used not only to assess hydrological processes, but also to address water quality issues, such as nitrogen pollution. This CRP aims to determine the spatio-temporal distribution of nitrogen isotopes in precipitation as a potential source of nitrogen pollution of water resources, especially of aquatic systems sensitive to eutrophication stressors. This CRP aims to combine N-isotopes with atmospheric chemistry and hydrometeorological techniques to better understand wet deposition processes and to characterize the origin of inorganic nitrogen loadings. Overall, the CRP will aim at improving the capability and expertise among participating Member States in the use of environmental isotopes to assess impacts of nitrogen wet deposition on water quality and ecosystems.

          Objectives

          To improve capability and expertise among Member States in the use of environmental isotopes to better assess impacts of nitrogen wet deposition on water quality.

          Specific objectives

          Explore the use of N-isotopes in precipitation networks in order to determine spatial patterns of N-isotope values that can be used to determine the relative contribution of nitrogen wet deposition in the degradation of water systems.

          Improve the application of N-isotopes combined with other isotope and chemistry substances to better define the origin of nitrogen in precipitation and evaluate the impact of nitrogen wet deposition on water resources and ecosystems.

          Assess and improve the understanding and interpretation of nitrogen transformations related to wet deposition.

          Explore the use of N-isotopes in precipitation networks in order to determine spatial patterns of N-isotope values that can be used to determine the relative contribution of nitrogen wet deposition in the degradation of water systems.

          Improve the application of N-isotopes combined with other isotope and chemistry substances to better define the origin of nitrogen in precipitation and evaluate the impact of nitrogen wet deposition on water resources and ecosystems.

          Assess and improve the understanding and interpretation of nitrogen transformations related to wet deposition.

          Impact

          CRP has a significant positive impact on the development of the nuclear application to support water quality studies. Particularly, Member States tested and applied routine use of environmental isotopes for the assessment of nitrogen wet deposition that can impact surface water and pose an eutrophication. TECDOC will provide a continuous guidance on the sampling, analysis and data interpretation and ensure the CRP outputs sustainability. Tested method was discussed and implemented in the TC projects in Latin America (Costa Rica) and Africa (Mauritius). Additionally, method, approach and data derived from the CRP were used in the Master and PhD studies in developing countries.

          Relevance

          CRP advanced understanding of possible environmental and anthropogenic impacts of nitrogen deposition on water resources for optimal water resources management and remediation strategies.

          CRP Publications

          Type

          Article

          Year

          2021

          Publication URL

          https://www.nature.com/articles/s41467-020-20356-0

          Description

          Important contributions of non-fossil fuel nitrogen oxides emissions

          Country/Organization

          China

          Type

          Article

          Year

          2020

          Publication URL

          https://www.sciencedirect.com/science/article/pii/S0045653519322635

          Description

          Nitrate sources and formation of rainwater constrained by dual isotopes in Southeast Asia: Example from Singapore

          Country/Organization

          Singapore

          Type

          Article

          Year

          2020

          Publication URL

          https://pubs.acs.org/doi/10.1021/acs.estlett.0c00105

          Description

          Nitrogen Isotope Differences between Major Atmospheric NOy Species: Implications for Transformation and Deposition Processes

          Country/Organization

          China

          Type

          Short Communication

          Year

          2020

          Description

          Nitrogen isotope differences between atmospheric nitrate and corresponding nitrogen oxides: A new constraint using oxygen isotopes

          Country/Organization

          China

          Type

          Article

          Year

          2021

          Publication URL

          https://www.sciencedirect.com/science/article/pii/S004565352102275X

          Description

          Fresh and aged PM2.5 and their ion composition in rural and urban atmospheres of Northern Thailand in relation to source identification

          Country/Organization

          Thailand

          Type

          Article

          Year

          2021

          Publication URL

          https://link.springer.com/article/10.1007/s11356-021-15327-x

          Description

          Stable isotopic characterization of nitrate wet deposition in the tropical urban atmosphere of Costa Rica

          Country/Organization

          Costa Rica

          Type

          Article

          Year

          2022

          Publication URL

          https://doi.org/10.1016/j.atmosres.2021.105971

          Description

          Isotopic composition (d15N, d18O) of nitrate in high-frequency precipitation events differentiate atmospheric processes and anthropogenic NOx emissions

          Country/Organization

          IAEA

          Type

          Article

          Year

          2021

          Publication URL

          https://link.springer.com/article/10.1007/s11356-021-15327-x

          Description

          Stable isotopic characterization of nitrate wet deposition in the tropical urban atmosphere of Costa Rica

          Country/Organization

          Costa Rica

          Type

          Article

          Year

          2021

          Publication URL

          https://www.sciencedirect.com/science/article/pii/S004565352102275X

          Description

          Fresh and aged PM2.5 and their ion composition in rural and urban atmospheres of Northern Thailand in relation to source identification

          Country/Organization

          Thailand

          Type

          Article

          Year

          2022

          Publication URL

          https://doi.org/10.1016/j.atmosenv.2022.119300

          Description

          Imprints of anthropogenic air pollution sources on nitrate isotopes in precipitation in a tropical metropolitan area

          Country/Organization

          Brazil

          Type

          Article

          Year

          2023

          Publication URL

          https://doi.org/10.1080/10256016.2023.2177649

          Description

          Nitrate isotopes ( d15N, d18O) in precipitation: best practices from an international coordinated research project

          Country/Organization

          IAEA

          Type

          Article

          Year

          2020

          Publication URL

          https://pubs.acs.org/doi/10.1021/acs.estlett.0c00105

          Description

          Nitrogen Isotope Differences between Major Atmospheric NOy Species: Implications for Transformation and Deposition Processes

          Country/Organization

          China

          Type

          Short Communication

          Year

          2020

          Description

          Nitrogen isotope differences between atmospheric nitrate and corresponding nitrogen oxides: A new constraint using oxygen isotopes

          Country/Organization

          China

          Type

          Article

          Year

          2021

          Publication URL

          https://www.nature.com/articles/s41467-020-20356-0

          Description

          Important contributions of non-fossil fuel nitrogen oxides emissions

          Country/Organization

          China

          Type

          Article

          Year

          2021

          Publication URL

          https://doi.org/10.1016/j.atmosenv.2021.118740

          Description

          Distinguishing in-cloud and below-cloud short and distal N-sources from high-temporal resolution seasonal nitrate and ammonium deposition in Vienna, Austria.

          Country/Organization

          IAEA

          Type

          Article

          Year

          2020

          Publication URL

          https://www.sciencedirect.com/science/article/pii/S0045653519322635

          Description

          Nitrate sources and formation of rainwater constrained by dual isotopes in Southeast Asia: Example from Singapore

          Country/Organization

          Singapore

          Stay in touch

          Newsletter

          <dd id="rw0xn"></dd>

        2. <label id="rw0xn"></label>

        3. <sup id="rw0xn"><strike id="rw0xn"></strike></sup><label id="rw0xn"></label>
            <th id="rw0xn"></th>
          1. <var id="rw0xn"></var>
              1. <table id="rw0xn"></table>

                <sub id="rw0xn"><meter id="rw0xn"></meter></sub>
                97碰成人国产免费公开视频