FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W4220852005> ?p ?o ?g. }

• W4220852005 abstract "&lt;p&gt;Among various measurement techniques, eddy covariance (EC) is the most direct one for measuring evapotranspiration (ET) fluxes at field to ecosystem scales (Aubinet et al., 2000). In the past two decades, EC flux towers around the world, particularly those within the FLUXNET, have served as a worldwide network of calibration and validation for surface-atmosphere energy and ET flux data obtained from remote sensing-based models or hydrological process-based models (Wang and Dickinson, 2012).&amp;#160;&lt;/p&gt;&lt;p&gt;One of the major challenges in model-data benchmarking is the spatial mismatch issue. For example, the grid cell size of around 10&lt;sup&gt;6&lt;/sup&gt; &amp;#8211; 10&lt;sup&gt;8&lt;/sup&gt; m&lt;sup&gt;2&lt;/sup&gt; in typical Earth system regional modeling cases is often several orders of magnitude larger than the EC flux footprints of around 10&lt;sup&gt;3&lt;/sup&gt;&amp;#8211;10&lt;sup&gt;7&lt;/sup&gt; m&lt;sup&gt;2&lt;/sup&gt;. Since most flux tower sites are located in more-or-less heterogeneous landscapes, multiple measurement units for spatially adequate sampling and representative fluxes are of interest for capturing the fine-scale spatial variation. However, the deployment of higher density sampling points was mainly limited by the costs of conventional analyzers. Therefore, there is increasing demand in the development of low-cost water vapor analyzers specifically for more spatial representative terrestrial ET flux footprints measurements based on EC methods.&lt;/p&gt;&lt;p&gt;In recent years, laser-based gas spectrometers have shown good reliability and effectiveness in the high-frequency and high-sensitivity measurement of various atmospheric trace gases. In this work, we have developed an open-path analyzer (HT1800, HealthyPhoton Co., Ltd.) for fast and sensitive measurements of atmospheric water vapor density. The analyzer employs a low-power vertical cavity surface emitting laser (VCSEL) and a near-infrared Indium Galinide Arsenide (InGaAs) photodetector. An open-path configuration with 0.5 m effective optical path length is used for selective and sensitive detection of the single spectral transition of H&lt;sub&gt;2&lt;/sub&gt;O at 1392 nm, which has been extensively studied in the field of spectroscopic analysis. Using this spectral line to realize the single-component measurement of water vapor density can avoid the complex cross-calibration process due to the H&lt;sub&gt;2&lt;/sub&gt;O-CO&lt;sub&gt;2&lt;/sub&gt; spectral interference as happened in traditional nondispersive infrared (NDIR) analyzers. On the other hand, the semiconductor nature of lasers and detectors can borrow the mature optical communication industry fabrication process, so that the cost of the core optoelectronic devices is expected to be reduced in mass production.&lt;/p&gt;&lt;p&gt;The analyzer has a precision (1&amp;#963; noise level) of 15 &amp;#956;mol mol&amp;#8722;1 (ppmv) at a sampling frequency of 10 Hz. Due to its open-path configuration, there is no delay or high-frequency damping due to surface adsorption. The analyzer head has a weight of ~2.8 kg and dimensions of 46 cm (length) and 9.5 cm (diameter). It can be powered by solar cells, with a total power consumption of as low as 10 W under normal operations. With good performance in terms of response time and precision, this instrument is an ideal tool for ET flux measurements based on the EC technique. An EC flux tower was built based on the open-path analyzer, which also included an integrated CO&lt;sub&gt;2&lt;/sub&gt; and H&lt;sub&gt;2&lt;/sub&gt;O open-path gas analyzer and 3-D sonic anemometer (IRGASON, Campbell Scientific) for comparison of ET flux measurement.&lt;/p&gt;" @default.
• W4220852005 created "2022-04-03" @default.
• W4220852005 creator A5009121120 @default.
• W4220852005 creator A5010744194 @default.
• W4220852005 creator A5020653191 @default.
• W4220852005 creator A5031527673 @default.
• W4220852005 creator A5073531557 @default.
• W4220852005 creator A5079920354 @default.
• W4220852005 creator A5079969251 @default.
• W4220852005 date "2022-03-27" @default.
• W4220852005 modified "2023-10-16" @default.
• W4220852005 title "A low-cost, open-path water vapor analyzer for eddy covariance measurement of evapotranspiration" @default.
• W4220852005 doi "https://doi.org/10.5194/egusphere-egu22-4761" @default.
• W4220852005 hasPublicationYear "2022" @default.
• W4220852005 type Work @default.
• W4220852005 citedByCount "0" @default.
• W4220852005 crossrefType "posted-content" @default.
• W4220852005 hasAuthorship W4220852005A5009121120 @default.
• W4220852005 hasAuthorship W4220852005A5010744194 @default.
• W4220852005 hasAuthorship W4220852005A5020653191 @default.
• W4220852005 hasAuthorship W4220852005A5031527673 @default.
• W4220852005 hasAuthorship W4220852005A5073531557 @default.
• W4220852005 hasAuthorship W4220852005A5079920354 @default.
• W4220852005 hasAuthorship W4220852005A5079969251 @default.
• W4220852005 hasConcept C107872376 @default.
• W4220852005 hasConcept C110872660 @default.
• W4220852005 hasConcept C113196181 @default.
• W4220852005 hasConcept C121332964 @default.
• W4220852005 hasConcept C176783924 @default.
• W4220852005 hasConcept C178790620 @default.
• W4220852005 hasConcept C185592680 @default.
• W4220852005 hasConcept C18903297 @default.
• W4220852005 hasConcept C35187779 @default.
• W4220852005 hasConcept C68709404 @default.
• W4220852005 hasConcept C86803240 @default.
• W4220852005 hasConceptScore W4220852005C107872376 @default.
• W4220852005 hasConceptScore W4220852005C110872660 @default.
• W4220852005 hasConceptScore W4220852005C113196181 @default.
• W4220852005 hasConceptScore W4220852005C121332964 @default.
• W4220852005 hasConceptScore W4220852005C176783924 @default.
• W4220852005 hasConceptScore W4220852005C178790620 @default.
• W4220852005 hasConceptScore W4220852005C185592680 @default.
• W4220852005 hasConceptScore W4220852005C18903297 @default.
• W4220852005 hasConceptScore W4220852005C35187779 @default.
• W4220852005 hasConceptScore W4220852005C68709404 @default.
• W4220852005 hasConceptScore W4220852005C86803240 @default.
• W4220852005 hasLocation W42208520051 @default.
• W4220852005 hasOpenAccess W4220852005 @default.
• W4220852005 hasPrimaryLocation W42208520051 @default.
• W4220852005 hasRelatedWork W2034584715 @default.
• W4220852005 hasRelatedWork W2070710961 @default.
• W4220852005 hasRelatedWork W2083824255 @default.
• W4220852005 hasRelatedWork W2277906316 @default.
• W4220852005 hasRelatedWork W2320052937 @default.
• W4220852005 hasRelatedWork W2626538200 @default.
• W4220852005 hasRelatedWork W2790956231 @default.
• W4220852005 hasRelatedWork W3129491970 @default.
• W4220852005 hasRelatedWork W3146110137 @default.
• W4220852005 hasRelatedWork W587249126 @default.
• W4220852005 isParatext "false" @default.
• W4220852005 isRetracted "false" @default.
• W4220852005 workType "article" @default.