Assessment on surface energy imbalance and energy partitioning using ground and satellite data over a semi-arid agricultural region in north China

Rahman, Masudur; Zhang, Wanchang; Wang, Kai

doi:10.1016/j.agwat.2018.10.032

Cited by 12 publications

(9 citation statements)

References 61 publications

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“…(2019) for the same site. This hourly ET hysteresis was also found in corn fields in Clay Center, Nebraska, USA (Irmak et al., 2014) and in China (Liu et al., 2011; Rahman et al., 2019; Xu et al., 2017). The elliptical shapes for hysteresis were a general characteristic within turbulent flux (LE + H ) with respect to available energy ( R n − G ).…”

Section: Resultssupporting

confidence: 59%

“…With respect to the available energy (R n − G), a counter-clockwise hysteresis loop was found in both 2014 and 2016, consistent with findings shown in Kutikoff et al (2019) for the same site. This hourly ET hysteresis was also found in corn fields in Clay Center, Nebraska, USA (Irmak et al, 2014) and in China (Liu et al, 2011;Rahman et al, 2019;Xu et al, 2017). The elliptical shapes for hysteresis were a general characteristic within turbulent flux (LE + H) with respect to available energy (R n − G).…”

Section: 1029/2020gl091203supporting

confidence: 55%

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Energy Imbalance and Evapotranspiration Hysteresis Under an Advective Environment: Evidence From Lysimeter, Eddy Covariance, and Energy Balance Modeling

Dhungel

Aiken

Evett

et al. 2021

Geophysical Research Letters

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Accurate water vapor flux quantification in agroecosystems has long been needed due to the occurrence of drought events and the continuous decline of underground water around the world. Various approaches have been utilized to quantify water vapor fluxes including remote sensing techniques, direct in situ measurements, and micrometeorological-based modeling systems. A weighing lysimeter directly weighs surface water loss from bare soil and/or vegetated surfaces (

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Section: Resultssupporting

confidence: 59%

Section: 1029/2020gl091203supporting

confidence: 55%

Energy Imbalance and Evapotranspiration Hysteresis Under an Advective Environment: Evidence From Lysimeter, Eddy Covariance, and Energy Balance Modeling

Dhungel

Aiken

Evett

et al. 2021

Geophysical Research Letters

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“…Eddy-covariance (EC) method is a well-established and widely accepted technique for the measurement of surface-atmosphere flux and gas exchange fluxes with considerable limitations. This method has been utilized for numerous field campaign for several purposes (Mauder et al 2006 ; Foken et al 2010 ; Rahman et al 2019 ). There are thousands of papers discussing the novelty of EC method but almost all the studies noticed some limitations during the measurement and maintenance at site level experiments.…”

Section: In Situ Measurement Methodsmentioning

confidence: 99%

“…The measurement of pollutant gases in flux based indices is complex but better results are attained in flux based calculations (Musselman et al 2006 ). There is no single or simple sensor for measuring the fluxes of trace gases at desired time and space like the other atmospheric sensors that are readily available for measuring the state variable like temperature, humidity, and wind velocity (Baldocchi 2014 ; Rahman et al 2019 ). The complexity of measurement is arisen due to the compound structure, weak spectral signature, very low concentration in volume mixtures, multi-scaled, hierarchal, sum of many non-linear feedback controls, and modulations of trace gases.…”

Section: Introductionmentioning

confidence: 99%

“…In the revolution period of personal computer (PC) with high volume data storage capability, the EC method with 3-D sonic anemometer and infrared/Laser spectroscopy with solid state devices have been applied widely for measuring the earth-atmospheric interacted parameters of water-energy cycle, carbon cycle, and nitrogen cycle. In case of water-energy cycle, there are several uncertainties happened in the measurement of energy fluxes due to the unsolved issue of surface energy balance closure (EBC) (Rahman et al 2019 ). The ultimate goal of this research community is to make possible and convenient measurement of the fluxes of the atmospheric trace gases and energy in everywhere and for all of the time but it is highly challenging due to the highly heterogeneous characteristics of the earth-atmosphere interaction.…”

Section: Introductionmentioning

confidence: 99%

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Recommendations on the measurement techniques of atmospheric pollutants from in situ and satellite observations: a review

Rahman

2023

Arab J Geosci

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Measurement of atmospheric air pollutants (aerosols, NO 2 , O 3 , CO, HCHO, and SO 2 ) is essential for characterizing the environmental and biogeochemical process to monitor the air quality. The concerned measurement methods and instrumentations are complex due to the weak spectral characteristics and very low concentration in volume mixtures of them in the atmosphere. This narrative review focuses on the fundamental and advanced concepts of almost all the in situ and satellite-based methods and instrumentations for measuring the gaseous and other air pollutants in the earth-atmosphere interaction. This paper discusses the literature of past and present developments in the measurement methods and instrumentations by highlighting their positive and negative feedbacks. The developing history (1970–2020) of space-borne instrumentations is indicated along with their techniques and capability to compute the concentration of the atmospheric pollutants for monitoring the air quality (air pollution) and climate in large (regional to global) scale. Several applications of the satellite instruments are described in terms of some important pollutant gases, most of which are known as ambient air pollutant. This study makes some recommendations to the readers so that they can utilize the measurement methods and instrumentations to estimate the important air pollutants such as NO 2 , SO 3 , O 3 , CO, and aerosols as well as for setting up future guidelines and air pollution control policies regarding the epidemiology and public health issues. Supplementary Information The online version contains supplementary material available at 10.1007/s12517-023-11410-4.

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An Observational Case Study of a Radiation Fog Event

Gandhi,

Geresdi,

Gyöngyösi

et al. 2024

Pure Appl. Geophys.

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A micrometeorological fog experiment was carried out in Budapest, Hungary during the winter half year of 2020–2021. The field observation involved (i) standard meteorological and radiosonde measurements; (ii) surface radiation balance and energy budget components, and (iii) ceilometer measurements. 23 fog events occurred during the whole campaign. Foggy events were categorized based on two different methods suggested by Tardif and Rasmussen (2007) and Lin et al. (2022). Using the Present Weather Detector and Visibility sensor (PWD12), duration of foggy periods are approximately shorter (~ 9%) compared to ceilometer measurements. The categorization of fog based on two different methods suggests that duration of radiation fogs is lower compared to that of cloud base lowering (CBL) fogs. The results of analysis of observed data about the longest fog event suggest that (i) it was a radiation fog that developed from the surface upwards with condition of a near neutral temperature profile. Near the surface the turbulent kinetic energy and turbulent momentum fluxes remained smaller than 0.4 m2 s–2 and 0.06 kg m–1 s–2, respectively. In the surface layer the vertical profile of the sensible heat flux was near constant (it changes with height ~ 10%), and during the evolution of the fog, its maximum value was smaller than 25 W m–2, (ii) the dissipation of the fog occurred due to increase of turbulence, (iii) longwave energy budget was close to zero during fog, and a significant increase of virtual potential temperature with height was observed before fog onset. The complete dataset gives an opportunity to quantify local effects, such as tracking the effect of strengthening of wind for modification of stability, surface layer profiles and visibility. Fog formation, development and dissipation are quantified based on the micrometeorological observations performed in suburb area of Budapest, providing a processing algorithm for investigating various fog events for synoptic analysis and for optimization of numerical model parameterizations.

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Assessment on surface energy imbalance and energy partitioning using ground and satellite data over a semi-arid agricultural region in north China

Cited by 12 publications

References 61 publications

Energy Imbalance and Evapotranspiration Hysteresis Under an Advective Environment: Evidence From Lysimeter, Eddy Covariance, and Energy Balance Modeling

Energy Imbalance and Evapotranspiration Hysteresis Under an Advective Environment: Evidence From Lysimeter, Eddy Covariance, and Energy Balance Modeling

Recommendations on the measurement techniques of atmospheric pollutants from in situ and satellite observations: a review

An Observational Case Study of a Radiation Fog Event

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