Investigation of the Equivalence of National Dew-Point Temperature Realizations in the −50 °C to + 20 °C Range

Heinonen, Martti; Anagnostou, M.; Bell, S A; Stevens, M; Benyon, R.; Bergerud, R. A.; Bojkovski, Jovan; Bosma, R.; Nielsen, Jan Alexis; Böse, N.; Cromwell, Plunkett; Doğan, Aliye Kartal; Aytekin, S. Oğuz; Uytun, A.; Fernicola, Vito; Flakiewicz, K.; Blanquart, Bertrand; Hudoklin, Domen; Jacobson, Per; Kentved, Anders Bonde; Loio, I; Mamontov, George; Masarykova, Alexandra; Mitter, Helmut; Mnguni, Regina; Otych, Jan; Steiner, Anton; Zsófia, Nagyné Szilágyi; Zvizdić, Davor

doi:10.1007/s10765-011-0950-x

Cited by 19 publications

(10 citation statements)

References 7 publications

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“…Thus, the humidity during three different recording time were considered comfort zone. The water vapor resulting from the evaporation process is trapped in the crates so that the humidity of the air increases and even reaches a saturation point [15]. High humidity makes it difficult for chickens to release body heat into the environment.…”

Section: Microclimatementioning

confidence: 99%

Physiological Responses and Blood Profile of Broiler Chicken Supplemented with Red Dragon Fruit Peel (Hylocereus polyrhizus) Subjected to Transportation Stress

Nurmeiliasari¹,

Fenita²,

Zitriyani³

et al. 2021

Proceedings of the International Seminar on Promoting Local Resources for Sustainable Agriculture and Development (ISPLRSAD 202

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Measurements on physiological responses and blood profile in 60 broiler chickens were conducted to evaluate the effect of red dragon fruit peel supplementations against three-hour road transportation stress. Broiler chickens aged 35 days were distributed into four treatment groups based on levels of red dragon fruit peel supplementation (0 g per head; 2.43g per head; 3.64g per head and 4.86 g/head). The birds were loaded into plastic crates and transported for three hours. After athree hour road transportation, the chickens were unloaded to measure respiration rate, rectal temperature and body weight loss. Blood samples were collected for changes in selected hematological parameters. Respiration rates and rectal temperatures were monitored before and after transportation process. The broilers were weighed before and after transportation. During transportation, the temperature and humidity were ranging from 33,55 -35,6 ˚C and 60,25 -64 %, respectively. There were no significant effects of dragon fruit peel supplementation on physiological responses and weight loss. The number of leukocytes and erythrocytes were not different from those of control broilers. Similarly, levels of hemoglobin and hematocrit values were not affected by supplementation of red dragon fruit peel. Measurements of leukocyte differentiation showed insignificant different; thus, the supplementation did not affect ratio of heterophyl: lymphocyte of broilers. In conclusion, supplementation of dragon fruit peel did not affect physiological responses and blood profile of broiler chicken subjected to transportation stress.

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Section: Microclimatementioning

confidence: 99%

Physiological Responses and Blood Profile of Broiler Chicken Supplemented with Red Dragon Fruit Peel (Hylocereus polyrhizus) Subjected to Transportation Stress

Nurmeiliasari¹,

Fenita²,

Zitriyani³

et al. 2021

Proceedings of the International Seminar on Promoting Local Resources for Sustainable Agriculture and Development (ISPLRSAD 202

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“…The scheme and a picture of EDIE1 are presented in Figure . A further improvement will be the development of humidity generator for hygrometer calibrations in temperature and pressure variable conditions, starting from the metrological research already present in the field (Heinonen, ; Hudoklin et al , ; Hudoklin and Drnovšek, ; Heinonen et al , ) and also allowing the calibration of thermometers and barometers under different humidity values as quantity of influence. Indeed, the apparatus is designed to allow the humidity control and thus to complete the characterization of the whole AWS pressure–temperature–humidity (PTU) modulus.…”

Section: Calibration Chambermentioning

confidence: 99%

Arctic metrology: calibration of radiosondes ground check sensors in Ny‐Ålesund

Musacchio

Bellagarda

Maturilli

et al. 2015

Meteorological Applications

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ABSTRACT:The Arctic research village of Ny-Ålesund (79 ∘ N, 12 ∘ E) on the Spitsbergen island of Svalbard archipelago, with its logistics and infrastructure, provides a unique access to the Arctic environment. Among the several international environmental and climate monitoring programmes constantly running there, the Global Climate Observing System (GCOS) Reference Upper Air Network (GRUAN) has established one of its stations at the Alfred Wegener Institute observatory. Calibration of sensors and measurement traceability are fundamental aspects of climate observations, as requested by the GRUAN measurement procedures. In the framework of the MeteoMet project, a transportable climatic chamber for the calibrations of air temperature and pressure sensors was studied and manufactured. In June 2014, a calibration campaign involved the transport and use of one of those systems in the Ny-Ålesund GRUAN station. The result of the campaign has been the complete calibration of temperature and pressure sensors for radiosonde pre-launch ground checks. The resulting calibration curves were obtained with lower uncertainties and more robust characterization of the sensors, with respect to the usual procedures adopted. Given the opportunity of the calibration device operating already in place and the presence of the metrology staff, the calibration was extended to the sensors equipping the Amundsen-Nobile Climate Change Tower. The present study reports on the 'Arctic metrology 2014' campaign and the plans for the establishment of a permanent laboratory for metrology in Ny-Ålesund. The aim is to address the measurement traceability needs arising from the multidisciplinary measurements made by the scientific community operating there.

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“…Dew-and frost-point mirror hygrometers (D/FPH) are known for their high accuracy. However, this is only true if they are regularly calibrated at high-accuracy (transfer) standards in specialized hygrometry laboratories such as in metrology institutes (Heinonen et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

Absolute, pressure-dependent validation of a calibration-free, airborne laser hygrometer transfer standard (SEALDH-II) from 5 to 1200 ppmv using a metrological humidity generator

Buchholz

Ebert

2018

Atmos. Meas. Tech.

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Abstract. Highly accurate water vapor measurements are indispensable for understanding a variety of scientific questions as well as industrial processes. While in metrology water vapor concentrations can be defined, generated, and measured with relative uncertainties in the single percentage range, field-deployable airborne instruments deviate even under quasistatic laboratory conditions up to 10–20 %. The novel SEALDH-II hygrometer, a calibration-free, tuneable diode laser spectrometer, bridges this gap by implementing a new holistic concept to achieve higher accuracy levels in the field. We present in this paper the absolute validation of SEALDH-II at a traceable humidity generator during 23 days of permanent operation at 15 different H2O mole fraction levels between 5 and 1200 ppmv. At each mole fraction level, we studied the pressure dependence at six different gas pressures between 65 and 950 hPa. Further, we describe the setup for this metrological validation, the challenges to overcome when assessing water vapor measurements on a high accuracy level, and the comparison results. With this validation, SEALDH-II is the first airborne, metrologically validated humidity transfer standard which links several scientific airborne and laboratory measurement campaigns to the international metrological water vapor scale.

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Investigation of the Equivalence of National Dew-Point Temperature Realizations in the −50 °C to + 20 °C Range

Cited by 19 publications

References 7 publications

Physiological Responses and Blood Profile of Broiler Chicken Supplemented with Red Dragon Fruit Peel (Hylocereus polyrhizus) Subjected to Transportation Stress

Physiological Responses and Blood Profile of Broiler Chicken Supplemented with Red Dragon Fruit Peel (Hylocereus polyrhizus) Subjected to Transportation Stress

Arctic metrology: calibration of radiosondes ground check sensors in Ny‐Ålesund

Absolute, pressure-dependent validation of a calibration-free, airborne laser hygrometer transfer standard (SEALDH-II) from 5 to 1200 ppmv using a metrological humidity generator

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