The MeteoMet2 project—highlights and results

Merlone, A.; Sanna, Francesca; Beges, G.; Bell, Simon J.; Beltramino, G.; Bojkovski, Jovan; Brunet, Manola; Campo, D. del; Castrillo, A.; Chiodo, Nicola; Colli, Matteo; Coppa, G.; Cuccaro, R.; Dobre, M.; Drnovšek, J.; Ebert, Volker; Fernicola, Vito; Garcia-Benadí, Albert; Garcia-Izquierdo, Carmen; Gardiner, Tom; Georgin, Éric; González, Alicia; Groselj, D.; Heinonen, Martti; Hernández, Sonia Melle; Högström, Richard; Hudoklin, Domen; Kalemci, M.; Kowal, A.; Lanza, Luca G.; Miao, Peng Cheng; Musacchio, Chiara; Nielsen, Jan Alexis; Nogueras, Marc; Aytekin, S. Oğuz; Pavlasek, P.; Podesta, Michael de; Rasmussen, Majken Kirkegaard; Del-Río-Fernández, J.; Rosso, L.; Sairanen, Hannu; Salminen, Juho; Šestan, Danijel; Šindelářová, L.; Smorgon, D.; Sparasci, F.; Strnad, R.; Underwood, Robin; Uytun, A.; Voldan, M.

doi:10.1088/1361-6501/aa99fc

Cited by 41 publications

(33 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Italian National Institute of Metrology (INRiM) staff were requested to join the evaluation committee. Recent work at INRiM included research activities and scientific production of direct interest for the present study: development of specific calibration systems and procedures (Musacchio et al, ), also for application in extreme environmental conditions (Musacchio et al, ), inclusion of changes in temperature standards for temperature series and extremes (Pavlasek et al, ), and specifically with the coordination of the large European project “MeteoMet—Metrology for Meteorology (Merlone et al, ; ). Both the Mitribah and Turbat stations were asked to send the thermometers that recorded the extreme temperature values to INRiM, where staff were made available for this study that requested specific calibration and comparison procedures.…”

Section: Metadata For Mitribah Kuwait and Turbat Pakistanmentioning

confidence: 99%

See 1 more Smart Citation

Temperature extreme records: World Meteorological Organization metrological and meteorological evaluation of the 54.0°C observations in Mitribah, Kuwait and Turbat, Pakistan in 2016/2017

Merlone

Al‐Dashti²,

Nadeem³

et al. 2019

Intl Journal of Climatology

View full text Add to dashboard Cite

A World Meteorological Organization (WMO) committee officially evaluated temperature record extremes of 54.0°C at two locations, one in Mitribah, Kuwait on July 21, 2016 and a second in Turbat, Pakistan on May 28, 2017. The committee agreed that quantity and quality of documentation of both observations were excellent. Additional metrological testing of the equipment focused on three aspects: the calibration of both thermometers, an effort to estimate the factors influencing the measurements and a direct comparison of the two thermometers when exposed simultaneously to 54°C. The metrological analysis's conclusion for the Mitribah value is a temperature estimated to be 53.87°C with an expanded uncertainty of ±0.08°C. Correspondingly, for the Turbat value the temperature is estimated to be 53.72°C with an expanded uncertainty of ±0.40°C. Following that analysis, the committee recommended acceptance of the calibrated observations to the first decimal digit such that the Mitribah observation is accepted as 53.9 ± 0.1°C and the Turbat as 53.7 ± 0.4°C. The Mitribah, Kuwait temperature is now accepted by the WMO as the highest temperature ever recorded for Asia (WMO RA II) and the two observations are the third (tied within uncertainty limits) and fourth highest WMO‐recognized temperature extremes and, significantly, they are the highest, officially recognized temperatures to have been recorded in the last 76 years. This evaluation has involved the most extensive temperature extremes analysis ever to be undertaken by an international evaluation committee of the WMO CCl Archive of Weather and Climate Extremes.

show abstract

Section: Metadata For Mitribah Kuwait and Turbat Pakistanmentioning

confidence: 99%

“…In the framework of European project MeteoMet (Merlone et al, ; ) the self‐heating of HMP 155 sensors was evaluated both in a climatic chamber and in a wind tunnel (Izquierdo et al, ). Results of that study showed a significant contribution to temperature readings due to self‐heating.…”

Section: Metrology Analysis (Mitribah Kuwait Sensor)mentioning

confidence: 99%

Temperature extreme records: World Meteorological Organization metrological and meteorological evaluation of the 54.0°C observations in Mitribah, Kuwait and Turbat, Pakistan in 2016/2017

Merlone

Al‐Dashti²,

Nadeem³

et al. 2019

Intl Journal of Climatology

View full text Add to dashboard Cite

show abstract

“…This work was supported by the project ENV58 MeteoMet2 “Metrology for essential climate variables” included in the frame programme EMRP (Merlone et al, ; ). The EMRP is jointly funded by the EMRP participating countries within EURAMET and the European Union.…”

Section: Acknowledgementsmentioning

confidence: 99%

Evaluation of the self‐heating effect in a group of thermometers used in meteorological and climate applications

Izquierdo

Hernández

González

et al. 2019

Meteorological Applications

View full text Add to dashboard Cite

A procedure for the metrological evaluation of the self‐heating effect in resistance thermometers is reported. This procedure is applied to different designs of resistance thermometers, used for meteorological and climate applications. The study of the self‐heating effect variation with the applied electrical current, temperature and different surrounding environments is described, as well as the influence of wind speed on the self‐heating effect.

show abstract

“…The metrological method proposed is addressed at understanding, evaluating and including the phenomenon in t air measurements and associated uncertainty. This work was developed within the numerous metrological activities of the European project MeteoMet-Metrology for Meteorology (Merlone et al, 2015a(Merlone et al, , 2018. The purpose of the work is to propose an experimental method for evaluation of the difference between readings of sensors exposed to reflected radiation from snow-covered surfaces with respect to natural soil, in the same site/area, and its inclusion in the overall t air measurement uncertainty budget.…”

Section: The Observed Phenomenonmentioning

confidence: 99%

An experimental method for evaluation of the snow albedo effect on near‐surface air temperature measurements

Musacchio

Coppa

Merlone

2018

Meteorological Applications

View full text Add to dashboard Cite

Among the many effects influencing the accuracy in near‐surface air temperature measurements (tair), solar radiation plays a key role. While numerous technical solutions have been developed to protect temperature sensors from direct solar radiation, few studies are available to evaluate the warming due to reflected radiation. Changes in surface albedo influence the measurement results of tair and, in the case of sensors positioned above a snow‐covered surface, this effect is amplified due to the larger amount of radiation reflected. As a task of the European project MeteoMet, a design for a metrological experimental setup and associated measurement method was studied, to quantify errors in temperature records when thermometers in solar shields and compact automatic weather stations are positioned above snow‐covered soil. An operative model was developed to minimize quantities of influence and uncertainties, while the experimental protocol proposed guidance on instruments required, sensor characterization, field experiment installations and site characteristics. The procedure described can be implemented by users without specific metrological skills: staff of hydro‐meteorological agencies with commonly used equipment and technicians of manufacturing companies can easily perform the measurements, characterize the instruments and evaluate the total maximum effect in terms of temperature increase and a correction factor or curve for specific typologies of instruments. The work presented is part of wider activities aimed at completing the calculation of an uncertainty budget on near‐surface air temperature measurement.

show abstract

The MeteoMet2 project—highlights and results

Cited by 41 publications

References 23 publications

Temperature extreme records: World Meteorological Organization metrological and meteorological evaluation of the 54.0°C observations in Mitribah, Kuwait and Turbat, Pakistan in 2016/2017

Temperature extreme records: World Meteorological Organization metrological and meteorological evaluation of the 54.0°C observations in Mitribah, Kuwait and Turbat, Pakistan in 2016/2017

Evaluation of the self‐heating effect in a group of thermometers used in meteorological and climate applications

An experimental method for evaluation of the snow albedo effect on near‐surface air temperature measurements

Contact Info

Product

Resources

About