Revisiting the Heat Field Deformation (HFD) method for measuring sap flow

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F62156489%3A43410%2F18%3A43913312" target="_blank" >RIV/62156489:43410/18:43913312 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.3832/ifor2381-011" target="_blank" >http://dx.doi.org/10.3832/ifor2381-011</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3832/ifor2381-011" target="_blank" >10.3832/ifor2381-011</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Revisiting the Heat Field Deformation (HFD) method for measuring sap flow

Popis výsledku v původním jazyce

The Heat Field Deformation (HFD) technique is a thermodynamic method for measuring sap flow. Based on continuous heating the HFD method allows for high time resolution measurements which are highly important when studying plant responses to abrupt environmental changes. This work provides a succinct review of previously described features of the HFD methodology. Analyzing symmetrical and asymmetrical temperature differences around a measured linear heater (dT(sym) and dT(as)) relative to their ratio dT(sym)/dT(as) (so called a K-diagram) is at the heart of this methodology. This key concept, however, has to date only been generally described in previous works on the HFD technique. My objective here is to provide a comprehensive overview describing different types of K-diagrams, their interpretation and application for determining K-values or dT(as) for a zero flow condition. The K-value is a measured parameter which is particularly important for objectively characterizing heat conducting properties at the sensor insertion point under specific local measurement conditions. Correctly determining the K-value is critical for accurately calculating sap flow based on recorded temperature measurements. I have included in this review several examples demonstrating how the K-value is dependent upon changes to the environment and its important role in sap flow estimation.

Název v anglickém jazyce

Revisiting the Heat Field Deformation (HFD) method for measuring sap flow

Popis výsledku anglicky

The Heat Field Deformation (HFD) technique is a thermodynamic method for measuring sap flow. Based on continuous heating the HFD method allows for high time resolution measurements which are highly important when studying plant responses to abrupt environmental changes. This work provides a succinct review of previously described features of the HFD methodology. Analyzing symmetrical and asymmetrical temperature differences around a measured linear heater (dT(sym) and dT(as)) relative to their ratio dT(sym)/dT(as) (so called a K-diagram) is at the heart of this methodology. This key concept, however, has to date only been generally described in previous works on the HFD technique. My objective here is to provide a comprehensive overview describing different types of K-diagrams, their interpretation and application for determining K-values or dT(as) for a zero flow condition. The K-value is a measured parameter which is particularly important for objectively characterizing heat conducting properties at the sensor insertion point under specific local measurement conditions. Correctly determining the K-value is critical for accurately calculating sap flow based on recorded temperature measurements. I have included in this review several examples demonstrating how the K-value is dependent upon changes to the environment and its important role in sap flow estimation.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10611 - Plant sciences, botany

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2018

Kód důvěrnosti údajů

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

Název periodika

iForest

ISSN

1971-7458

e-ISSN

—

Svazek periodika

11

Číslo periodika v rámci svazku

February

Stát vydavatele periodika

IT - Italská republika

Počet stran výsledku

13

Strana od-do

118-130

Kód UT WoS článku

000425472500001

EID výsledku v databázi Scopus

2-s2.0-85042348796