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Contribution of understory evaporation in a tropical wet forest during the dry season. / Jiménez-Rodríguez, César Dionisio; Coenders-Gerrits, Miriam; Wenninger, Jochen; Gonzalez-Angarita, Adriana; Savenije, Hubert.

In: Hydrology and Earth System Sciences, Vol. 24, No. 4, 2020, p. 2179-2206.

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@article{a1bf14949f584fa1ad1bef6b39fdfb75,
title = "Contribution of understory evaporation in a tropical wet forest during the dry season",
abstract = "Tropical wet forests are complex ecosystems with a large number of plant species. These environments are characterized by a high water availability throughout the whole year and a complex canopy structure. However, how the different sections of the canopy contribute to total evaporation is poorly understood. The aim of this work is to estimate the total evaporation flux and differentiate the contribution among canopy layers of a tropical wet forest in Costa Rica. The fluxes were monitored during the dry season by making use of the energy balance to quantify the fluxes and stable water isotopes to trace the sources of water vapor. Total evaporation was 275.5 mm and represents 55.9 % of the recorded precipitation (498.8 mm), with 11.7 % of the precipitation being intercepted and evaporated along the forest canopy. The understory beneath 8 m contributed 23.6 % of the evaporation, and almost half of it comes from the first 2 m of the understory. Stable water isotope signatures show different soil water sources depending on the plant type. Palms make use of a water source with an isotope signature similar to precipitation and throughfall. Soil water with a fractionated signature is used by trees, bushes and lianas. The isotope signature of water vapor samples overlap among different heights, but it was not possible to make use of the Keeling plot method due to the similar isotope signature of the possible sources of water vapor as well as the high water concentration even on the dryer days.",
author = "Jim{\'e}nez-Rodr{\'i}guez, {C{\'e}sar Dionisio} and Miriam Coenders-Gerrits and Jochen Wenninger and Adriana Gonzalez-Angarita and Hubert Savenije",
year = "2020",
doi = "10.5194/hess-24-2179-2020",
language = "English",
volume = "24",
pages = "2179--2206",
journal = "Hydrology and Earth System Sciences",
issn = "1027-5606",
publisher = "European Geosciences Union",
number = "4",

}

RIS

TY - JOUR

T1 - Contribution of understory evaporation in a tropical wet forest during the dry season

AU - Jiménez-Rodríguez, César Dionisio

AU - Coenders-Gerrits, Miriam

AU - Wenninger, Jochen

AU - Gonzalez-Angarita, Adriana

AU - Savenije, Hubert

PY - 2020

Y1 - 2020

N2 - Tropical wet forests are complex ecosystems with a large number of plant species. These environments are characterized by a high water availability throughout the whole year and a complex canopy structure. However, how the different sections of the canopy contribute to total evaporation is poorly understood. The aim of this work is to estimate the total evaporation flux and differentiate the contribution among canopy layers of a tropical wet forest in Costa Rica. The fluxes were monitored during the dry season by making use of the energy balance to quantify the fluxes and stable water isotopes to trace the sources of water vapor. Total evaporation was 275.5 mm and represents 55.9 % of the recorded precipitation (498.8 mm), with 11.7 % of the precipitation being intercepted and evaporated along the forest canopy. The understory beneath 8 m contributed 23.6 % of the evaporation, and almost half of it comes from the first 2 m of the understory. Stable water isotope signatures show different soil water sources depending on the plant type. Palms make use of a water source with an isotope signature similar to precipitation and throughfall. Soil water with a fractionated signature is used by trees, bushes and lianas. The isotope signature of water vapor samples overlap among different heights, but it was not possible to make use of the Keeling plot method due to the similar isotope signature of the possible sources of water vapor as well as the high water concentration even on the dryer days.

AB - Tropical wet forests are complex ecosystems with a large number of plant species. These environments are characterized by a high water availability throughout the whole year and a complex canopy structure. However, how the different sections of the canopy contribute to total evaporation is poorly understood. The aim of this work is to estimate the total evaporation flux and differentiate the contribution among canopy layers of a tropical wet forest in Costa Rica. The fluxes were monitored during the dry season by making use of the energy balance to quantify the fluxes and stable water isotopes to trace the sources of water vapor. Total evaporation was 275.5 mm and represents 55.9 % of the recorded precipitation (498.8 mm), with 11.7 % of the precipitation being intercepted and evaporated along the forest canopy. The understory beneath 8 m contributed 23.6 % of the evaporation, and almost half of it comes from the first 2 m of the understory. Stable water isotope signatures show different soil water sources depending on the plant type. Palms make use of a water source with an isotope signature similar to precipitation and throughfall. Soil water with a fractionated signature is used by trees, bushes and lianas. The isotope signature of water vapor samples overlap among different heights, but it was not possible to make use of the Keeling plot method due to the similar isotope signature of the possible sources of water vapor as well as the high water concentration even on the dryer days.

UR - http://www.scopus.com/inward/record.url?scp=85084461351&partnerID=8YFLogxK

U2 - 10.5194/hess-24-2179-2020

DO - 10.5194/hess-24-2179-2020

M3 - Article

AN - SCOPUS:85084461351

VL - 24

SP - 2179

EP - 2206

JO - Hydrology and Earth System Sciences

JF - Hydrology and Earth System Sciences

SN - 1027-5606

IS - 4

ER -

ID: 73179383