Reference Models for Lithospheric Geoneutrino Signal

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F20%3A10421617" target="_blank" >RIV/00216208:11320/20:10421617 - isvavai.cz</a>

Výsledek na webu

<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=8GqxBqABfO" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=8GqxBqABfO</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1029/2019.11;018433" target="_blank" >10.1029/2019.11;018433</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Reference Models for Lithospheric Geoneutrino Signal

Popis výsledku v původním jazyce

Debate continues on the amount and distribution of radioactive heat producing elements (i.e., U, Th, and K) in the Earth, with estimates for mantle heat production varying by an order of magnitude. Constraints on the bulk-silicate Earth&apos;s (BSE) radiogenic power also places constraints on overall BSE composition. Geoneutrino detection is a direct measure of the Earth&apos;s decay rate of Th and U. The geoneutrino signal has contributions from the local (similar to 40%) and global (similar to 35%) continental lithosphere and the underlying inaccessible mantle (similar to 25%). Geophysical models are combined with geochemical data sets to predict the geoneutrino signal at current and future geoneutrino detectors. We propagated uncertainties, both chemical and physical, through Monte Carlo methods. Estimated total signal uncertainties are on the order of similar to 20%, proportionally with geophysical and geochemical inputs contributing similar to 30% and similar to 70%, respectively. We find that estimated signals, calculated using CRUST2.0, CRUST1.0, and LITHO1.0, are within physical uncertainty of each other, suggesting that the choice of underlying geophysical model will not change results significantly, but will shift the central value by up to similar to 15%. Similarly, we see no significant difference between calculated layer abundances and bulk crustal heat production when using these geophysical models. The bulk crustal heat production is calculated as 7 +/- 2 TW, which includes an increase of 1 TW in uncertainty relative to previous studies. Combination of our predicted lithospheric signal with measured signals yield an estimated BSE heat production of 21.5 +/- 10.4 TW. Future improvements, including uncertainty attribution and near-field modeling, are discussed.

Název v anglickém jazyce

Reference Models for Lithospheric Geoneutrino Signal

Popis výsledku anglicky

Debate continues on the amount and distribution of radioactive heat producing elements (i.e., U, Th, and K) in the Earth, with estimates for mantle heat production varying by an order of magnitude. Constraints on the bulk-silicate Earth&apos;s (BSE) radiogenic power also places constraints on overall BSE composition. Geoneutrino detection is a direct measure of the Earth&apos;s decay rate of Th and U. The geoneutrino signal has contributions from the local (similar to 40%) and global (similar to 35%) continental lithosphere and the underlying inaccessible mantle (similar to 25%). Geophysical models are combined with geochemical data sets to predict the geoneutrino signal at current and future geoneutrino detectors. We propagated uncertainties, both chemical and physical, through Monte Carlo methods. Estimated total signal uncertainties are on the order of similar to 20%, proportionally with geophysical and geochemical inputs contributing similar to 30% and similar to 70%, respectively. We find that estimated signals, calculated using CRUST2.0, CRUST1.0, and LITHO1.0, are within physical uncertainty of each other, suggesting that the choice of underlying geophysical model will not change results significantly, but will shift the central value by up to similar to 15%. Similarly, we see no significant difference between calculated layer abundances and bulk crustal heat production when using these geophysical models. The bulk crustal heat production is calculated as 7 +/- 2 TW, which includes an increase of 1 TW in uncertainty relative to previous studies. Combination of our predicted lithospheric signal with measured signals yield an estimated BSE heat production of 21.5 +/- 10.4 TW. Future improvements, including uncertainty attribution and near-field modeling, are discussed.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10500 - Earth and related environmental sciences

Projekt

<a href="/cs/project/GA17-01464S" target="_blank" >GA17-01464S: Studium radiogenního zahřívání Země metodami částicové geofyziky: geoneutrina a vzácné plyny</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2020

Kód důvěrnosti údajů

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

Název periodika

Journal of Geophysical Research: Solid Earth

ISSN

2169-9313

e-ISSN

—

Svazek periodika

125

Číslo periodika v rámci svazku

2

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

17

Strana od-do

e2019JB018433

Kód UT WoS článku

000530895200054

EID výsledku v databázi Scopus

—