Interannual variability of terpenoid emissions in an alpine city

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F86652079%3A_____%2F22%3A00557280" target="_blank" >RIV/86652079:_____/22:00557280 - isvavai.cz</a>

Výsledek na webu

<a href="https://acp.copernicus.org/articles/22/5603/2022/acp-22-5603-2022.pdf" target="_blank" >https://acp.copernicus.org/articles/22/5603/2022/acp-22-5603-2022.pdf</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.5194/acp-22-5603-2022" target="_blank" >10.5194/acp-22-5603-2022</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Interannual variability of terpenoid emissions in an alpine city

Popis výsledku v původním jazyce

Terpenoid emissions above urban areas are a complex mix of biogenic and anthropogenic emission sources. In line with previous studies we found that summertime terpenoid fluxes in an alpine city were dominated by biogenic sources. Inter-seasonal emission measurements revealed consistency for monoterpenes and sesquiterpenes but a large difference in isoprene between the summers of 2015 and 2018. Standardized emission potentials for monoterpenes and sesquiterpenes were 0.12 nmol m(-2) s(-1) and 3.0 x 10(-3) nmol m(-2) s(-1) in 2015 and 0.11 nmol m(-2) s(-1) and 3.4 x 10(-3) nmol m(-2) s(-1) in 2018, respectively. Observed isoprene fluxes were almost 3 times higher in 2018 than in 2015. This factor decreased to 2.3 after standardizing isoprene fluxes to 30 degrees C air temperature and photosynthetic active radiation (PAR) to 1000 mu mol m(-2) s(-1). Based on emission model parameterizations, increased leaf temperatures can explain some of these differences, but standardized isoprene emission potentials remained higher in 2018 when a heat wave persisted. These data suggest a higher variability of interannual isoprene fluxes than for other terpenes. Potential reasons for the observed differences such as emission parameterization, footprint changes, water stress conditions, and tree trimming are investigated.

Název v anglickém jazyce

Interannual variability of terpenoid emissions in an alpine city

Popis výsledku anglicky

Terpenoid emissions above urban areas are a complex mix of biogenic and anthropogenic emission sources. In line with previous studies we found that summertime terpenoid fluxes in an alpine city were dominated by biogenic sources. Inter-seasonal emission measurements revealed consistency for monoterpenes and sesquiterpenes but a large difference in isoprene between the summers of 2015 and 2018. Standardized emission potentials for monoterpenes and sesquiterpenes were 0.12 nmol m(-2) s(-1) and 3.0 x 10(-3) nmol m(-2) s(-1) in 2015 and 0.11 nmol m(-2) s(-1) and 3.4 x 10(-3) nmol m(-2) s(-1) in 2018, respectively. Observed isoprene fluxes were almost 3 times higher in 2018 than in 2015. This factor decreased to 2.3 after standardizing isoprene fluxes to 30 degrees C air temperature and photosynthetic active radiation (PAR) to 1000 mu mol m(-2) s(-1). Based on emission model parameterizations, increased leaf temperatures can explain some of these differences, but standardized isoprene emission potentials remained higher in 2018 when a heat wave persisted. These data suggest a higher variability of interannual isoprene fluxes than for other terpenes. Potential reasons for the observed differences such as emission parameterization, footprint changes, water stress conditions, and tree trimming are investigated.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10509 - Meteorology and atmospheric sciences

Projekt

<a href="/cs/project/EF16_019%2F0000797" target="_blank" >EF16_019/0000797: SustES - Adaptační strategie pro udržitelnost ekosystémových služeb a potravinové bezpečnosti v nepříznivých přírodních podmínkách</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2022

Kód důvěrnosti údajů

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

Název periodika

Atmospheric Chemistry and Physics

ISSN

1680-7316

e-ISSN

1680-7324

Svazek periodika

22

Číslo periodika v rámci svazku

8

Stát vydavatele periodika

DE - Spolková republika Německo

Počet stran výsledku

16

Strana od-do

5603-5618

Kód UT WoS článku

000787846100001

EID výsledku v databázi Scopus

2-s2.0-85129274284