Dynamics and variability of microclimate in an unmanaged mountain forest after a bark beetle outbreak

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60077344%3A_____%2F24%3A00605703" target="_blank" >RIV/60077344:_____/24:00605703 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/60460709:41320/24:101462 RIV/60076658:12310/24:43908032

Výsledek na webu

<a href="https://doi.org/10.1016/j.agrformet.2023.109824" target="_blank" >https://doi.org/10.1016/j.agrformet.2023.109824</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.agrformet.2023.109824" target="_blank" >10.1016/j.agrformet.2023.109824</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Dynamics and variability of microclimate in an unmanaged mountain forest after a bark beetle outbreak

Popis výsledku v původním jazyce

Forest disturbances alter hydrological, energy, and microclimatic characteristics and their extents vary with the landscape characteristics of the terrain. We evaluated changes in evapotranspiration and latent heat rate in an unmanaged, central European mountain forest (Norway spruce) after a bark beetle-induced mortality of >75 % trees, and the spatial variability in microclimate during its natural regeneration. We observed that (1) the annual mean incident solar radiation to the treeless plots was 8.2 MJ m(-2) day(-1) (95 W m(-2)), being reduced by similar to 45 % compared to its theoretical flux by high average cloudiness (70.6%) and short daily sunshine (4.3 hour day(-1)). The observed energy input to the forest floor beneath survived canopies (1.2 MJ m(-2) day(-1)) was an order of magnitude lower than solar radiation to the canopy surface. (2) The mean annual evapotranspiration and the average annual latent heat rate decreased by 155 mm yr(-1) and 385 MJ m(-2) yr(-1) (12 W m(-2)), respectively, after tree dieback. (3) The soil and air temperatures at individual plots correlated positively with the incident solar radiation and negatively with elevation. Mean soil and air temperatures exhibited similar lapse rates of 5.9-8.0 degrees C km(-1) during the growing season (May-October). The energy input (positive relationship) and elevation (negative relationship) explained 74-83 % of the between-plot variability in mean soil and air temperatures and 51-77 % of their daily amplitudes during the growing season. (4) On sunny days, the observed soil and air temperatures were significantly lower (by similar to 50 and 15 %, respectively) than ground surface temperature based on thermal satellite data (Landsat-8). The ground surface temperature explained 80-92 % of the observed variability in the soil and air temperatures. (5) The between-plot differences in daily soil and air temperatures and their amplitudes were from 24 to 70 % explained by solar radiation (positive correlation) and relative air humidity and wind speed (negative correlations).

Název v anglickém jazyce

Dynamics and variability of microclimate in an unmanaged mountain forest after a bark beetle outbreak

Popis výsledku anglicky

Forest disturbances alter hydrological, energy, and microclimatic characteristics and their extents vary with the landscape characteristics of the terrain. We evaluated changes in evapotranspiration and latent heat rate in an unmanaged, central European mountain forest (Norway spruce) after a bark beetle-induced mortality of >75 % trees, and the spatial variability in microclimate during its natural regeneration. We observed that (1) the annual mean incident solar radiation to the treeless plots was 8.2 MJ m(-2) day(-1) (95 W m(-2)), being reduced by similar to 45 % compared to its theoretical flux by high average cloudiness (70.6%) and short daily sunshine (4.3 hour day(-1)). The observed energy input to the forest floor beneath survived canopies (1.2 MJ m(-2) day(-1)) was an order of magnitude lower than solar radiation to the canopy surface. (2) The mean annual evapotranspiration and the average annual latent heat rate decreased by 155 mm yr(-1) and 385 MJ m(-2) yr(-1) (12 W m(-2)), respectively, after tree dieback. (3) The soil and air temperatures at individual plots correlated positively with the incident solar radiation and negatively with elevation. Mean soil and air temperatures exhibited similar lapse rates of 5.9-8.0 degrees C km(-1) during the growing season (May-October). The energy input (positive relationship) and elevation (negative relationship) explained 74-83 % of the between-plot variability in mean soil and air temperatures and 51-77 % of their daily amplitudes during the growing season. (4) On sunny days, the observed soil and air temperatures were significantly lower (by similar to 50 and 15 %, respectively) than ground surface temperature based on thermal satellite data (Landsat-8). The ground surface temperature explained 80-92 % of the observed variability in the soil and air temperatures. (5) The between-plot differences in daily soil and air temperatures and their amplitudes were from 24 to 70 % explained by solar radiation (positive correlation) and relative air humidity and wind speed (negative correlations).

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10617 - Marine biology, freshwater biology, limnology

Projekt

<a href="/cs/project/GA22-05421S" target="_blank" >GA22-05421S: Vliv dostupnosti dusíku a stavu lesa na půdní mikrobiom, cykly prvků a biologické zotavování acidifikovaných vod v horkých ekosystémech.</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2024

Kód důvěrnosti údajů

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

Název periodika

Agricultural and Forest Meteorology

ISSN

0168-1923

e-ISSN

1873-2240

Svazek periodika

344

Číslo periodika v rámci svazku

Jan

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

14

Strana od-do

109824

Kód UT WoS článku

001128079800001

EID výsledku v databázi Scopus

2-s2.0-85178330289