Evapotranspiration and energy balance of native wet montane cloud forest in Hawai‘i

Giambelluca, Thomas W.; Martin, Robert E.; Asner, Gregory P.; Huang, Maoyi; Mudd, R. G.; Nullet, Michael A.; DeLay, John K.; Foote, David

doi:10.1016/j.agrformet.2008.08.004

Cited by 73 publications

(48 citation statements)

References 50 publications

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“…), Chile;during 2008-2009and 2009-2010 seasons. Trials were performed in the central part of a 150 ha field planted with table grapes in overhead trellis.…”

Section: Experimental Sitementioning

confidence: 99%

“…The ETc may be estimated based on studies of soil water balance in cultivated fields (Allen et al, 1998), by weighing lysimeters (Allen et al, 1998;Williams et al, 2003b;Williams and Ayars, 2005a), by method of mass transference or energy balance (Allen et al, 1998;Moguel et al, 2001;Teixeira et al, 2007;Conceição et al, 2008;Giambelluca et al, 2009), or Eddy covariance RESEARCH method (Martín de Santa Olalla y de Juan, 1993;Gomes, 2003;Paço et al, 2004;Barr et al, 2006;Conceição et al, 2008;Giambelluca et al, 2009) or using reference evapotranspiration (ET0) weighted by a crop coefficient (Kc) (Allen et al, 1998;Ferreira et al, 2006).…”

Section: Introductionmentioning

confidence: 99%

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Estimation of water requirements and Kc values of Thompson Seedless table grapes grown in the overhead trellis system, using the Eddy covariance metho

Villagra

Cortázar²,

Ferreyra

et al. 2014

Chilean J. Agric. Res.

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“…), Chile;during 2008-2009and 2009-2010 seasons. Trials were performed in the central part of a 150 ha field planted with table grapes in overhead trellis.…”

Section: Experimental Sitementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Estimation of water requirements and Kc values of Thompson Seedless table grapes grown in the overhead trellis system, using the Eddy covariance metho

Villagra

Cortázar²,

Ferreyra

et al. 2014

Chilean J. Agric. Res.

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“…The island is located at approximately 20° north latitude, which creates a seasonal sunlight cycle [11] that affects forest chemical phenology and leaf area index (LAI) [12]. The area is located at approximately 1,200 m above sea level, and characterized by a mean annual rainfall of 2,500 mm [13,14] and an annual temperature fluctuating between 14 °C in winter and 17 °C in summer [1].…”

Section: Study Area and Remote Sensingmentioning

confidence: 99%

Hyperspectral Time Series Analysis of Native and Invasive Species in Hawaiian Rainforests

Somers

Asner

2012

Remote Sensing

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Abstract:The unique ecosystems of the Hawaiian Islands are progressively being threatened following the introduction of exotic species. Operational implementation of remote sensing for the detection, mapping and monitoring of these biological invasions is currently hampered by a lack of knowledge on the spectral separability between native and invasive species. We used spaceborne imaging spectroscopy to analyze the seasonal dynamics of the canopy hyperspectral reflectance properties of four tree species: (i) Metrosideros polymorpha, a keystone native Hawaiian species; (ii) Acacia koa, a native Hawaiian nitrogen fixer; (iii) the highly invasive Psidium cattleianum; and (iv) Morella faya, a highly invasive nitrogen fixer. The species specific separability of the reflectance and derivative-reflectance signatures extracted from an Earth Observing-1 Hyperion time series, composed of 22 cloud-free images spanning a period of four years and was quantitatively evaluated using the Separability Index (SI). The analysis revealed that the Hawaiian native trees were universally unique from the invasive trees in their near-infrared-1 (700-1,250 nm) reflectance (0.4 > SI > 1.4). Due to its higher leaf area index, invasive trees generally had a higher near-infrared reflectance. To a lesser extent, it could also be demonstrated that nitrogen-fixing trees were spectrally unique from non-fixing trees. The higher leaf nitrogen content of nitrogen-fixing trees was expressed through slightly increased separabilities in visible and shortwave-infrared reflectance wavebands (SI = 0.4). We also found phenology to be key to spectral separability analysis. As such, it was shown that the spectral separability in the near-infrared-1 reflectance OPEN ACCESSRemote Sens. 2012, 4 2511 between the native and invasive species groups was more expressed in summer (SI > 0.7) than in winter (SI < 0.7). The lowest separability was observed for March-July (SI < 0.3). This could be explained by the invasives taking advantage of the warmer summer period to expand their canopy. There was, however, no specific time window or a single spectral region that always defined the separability of all species groups, and thus intensive monitoring of plant phenology as well as the use of the full-range (400-2,500 nm) spectrum was highly advantageous in differentiating each species. These results set a basis for an operational invasive species monitoring program in Hawai'i using spaceborne imaging spectroscopy.

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“…El bosque natural se comporta similarmente a lo reportado por Giambelluca et al (2009) para un bosque de niebla en Hawái.…”

Section: Discussionunclassified

“…No obstante, los trabajos relacionados con el bosque de niebla se centran en el balance de energía sin considerar efectos de cambios de cobertura (e.g. Giambelluca et al, 2009), o en el efecto que tiene este cambio en procesos del suelo y/o vegetación (e.g. Campos, 2006).…”

Section: Introductionunclassified

Efecto de la urbanización en el balance de energía superficial de un bosque de niebla al este de México

Domínguez-Eusebio¹,

Tejeda-Martı́nez²,

Perroni³

2016

Clima, Sociedad, Riesgos Y Ordenación Del Territorio

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RESUMENCaracterísticas de la superficie como rugosidad, cobertura y capacidad térmica, condicionan el espesor de la capa límite superficial atmosférica y los procesos que ocurren en ella. Sin embargo, poco se sabe de las modificaciones en esos procesos ante cambios en la superficie de ecosistemas naturales. El objetivo de este estudio fue obtener una primera caracterización del efecto de la urbanización en el balance energético del bosque de niebla, ecosistema común en montañas tropicales. Se utilizó el método de covarianza turbulenta en dos estaciones micrometeorológicas: una en un bosque urbano (Parque Ecológico Cerro de Macuiltépetl: 19°32'51"N, 96°55'122"W, 1580 msnm), y otra en un bosque natural (El Riscal: 19°28'54 Palabras clave: flujos de energía, bosque de niebla, urbanización, covarianza turbulenta. ABSTRACTThe surface characteristics such as roughness, coverage and heat capacity determines the thickness of the atmospheric surface boundary layer and the processes occurring therein. However, the interaction of these systems in relation to changes in the surface of natural ecosystems has been little studied. In this way, the objective of this study was to conduct a first characterization of the effect of urbanization on the energy balance of cloud forest, a common ecosystem in tropical mountains. The eddy covariance method was used in two micrometeorological stations: in an urban forest (Parque Ecológico Cerro de Macuiltépetl: 19°32'51"N, 96°55'12"W, 1580 masl) and a natural forest (El Riscal: 19°28'54"N, 96°59'44"W, 1570 masl

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Evapotranspiration and energy balance of native wet montane cloud forest in Hawai‘i

Cited by 73 publications

References 50 publications

Estimation of water requirements and Kc values of Thompson Seedless table grapes grown in the overhead trellis system, using the Eddy covariance metho

Estimation of water requirements and Kc values of Thompson Seedless table grapes grown in the overhead trellis system, using the Eddy covariance metho

Hyperspectral Time Series Analysis of Native and Invasive Species in Hawaiian Rainforests

Efecto de la urbanización en el balance de energía superficial de un bosque de niebla al este de México

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Evapotranspiration and energy balance of native wet montane cloud forest in Hawai‘i

Cited by 73 publications

References 50 publications

Estimation of water requirements and Kc values of Thompson Seedless table grapes grown in the overhead trellis system, using the Eddy covariance metho

Estimation of water requirements and Kc values of Thompson Seedless table grapes grown in the overhead trellis system, using the Eddy covariance metho

Hyperspectral Time Series Analysis of Native and Invasive Species in Hawaiian Rainforests

Efecto de la urbanización en el balance de energía superficial de un bosque de niebla al este de México

Contact Info

Product

Resources

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Estimation of water requirements and Kc values of Thompson Seedless table grapes grown in the overhead trellis system, using the Eddy covariance metho

Estimation of water requirements and Kc values of Thompson Seedless table grapes grown in the overhead trellis system, using the Eddy covariance metho