Causes of 15N/14N isotope differences among aerosol, fog, rime and vertical deposition: Toward robust Bayesian modeling of nitrogen sources

Provider

Czech Science Foundation

Programme

Standard projects

Call for proposals

SGA0202600001

Main participants

Česká geologická služba

Contest type

VS - Public tender

Contract ID

26-21383S

Project name in Czech

Causes of 15N/14N isotope differences among aerosol, fog, rime and vertical deposition: Toward robust Bayesian modeling of nitrogen sources

Annotation in Czech

In many countries worldwide, NOx emissions currently decrease as a result of pollution control, while NH3 emissions stagnate. Presently, little is known about the magnitude and isotope dynamics of horizontal deposition of NO3- and NH4+, the oxidation/neutralization products of these primary pollutants, relative to vertical deposition. To close this knowledge gap, we will study horizontal and vertical atmospheric inputs of NO3- and NH4+ at 16 Central European mountain-top and lowland sites. N isotope ratios, possibly affected by fractionations in the atmosphere, will be used to quantify contributions of 10 pollutant sources to reactive nitrogen inputs. Our basic research involving Bayesian isotope modeling can be instrumental in policy making decisions on measures to further limit NH3 emissions. Unlike (NH4)2SO4 whose origin is regional to global, NH4NO3 pollution is more local and can be effectively mitigated through national-level measures. The proposed research focuses on a secondary pollutant with the highest potential for national air quality improvement among all aerosol types.

R&D category

ZV - Basic research

OECD FORD - main branch

10511 - Environmental sciences (social aspects to be 5.7)

OECD FORD - secondary branch

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OECD FORD - another secondary branch

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CEP - equivalent branches <br>(according to the <a href="http://www.vyzkum.cz/storage/att/E6EF7938F0E854BAE520AC119FB22E8D/Prevodnik_oboru_Frascati.pdf">converter</a>)

DI - Pollution and air control<br>DJ - Pollution and water control<br>DK - Contamination and decontamination of soil including pesticides<br>DL - Nuclear waste, radioactive pollution and control<br>DM - Solid waste and its control, recycling<br>DO - Protection of landscape

Realization period - beginning

Jan 1, 2026

Realization period - end

Dec 31, 2028

Project status

Z - Beginning multi-year project

Latest support payment

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Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Data delivery code

CEP26-GA0-GA-R

Data delivery date

Jun 25, 2026

Total approved costs

11,199 thou. CZK

Public financial support

11,199 thou. CZK

Other public sources

0 thou. CZK

Non public and foreign sources

0 thou. CZK