WMO/TD

IOM Report, 107. WMO Intercomparison of High Quality Radiosonde Systems

World Meteorological Organization (WMO) ; Oakley T.; Vömel Holger; et al. - WMO, 2011 (WMO/TD-No. 1580)

The present report includes a detailed analysis of the QRS intercomparisons, a specific analysis of the SSI group, and draws conclusions and recommendations that are key information for the manufacturers, the NMHS as well as the scientific and climate community. Results show that unprecedented performances have been achieved with QRS while the expected performances to be reached with respect to the GRUAN specifications still require more research. This work is an essential contribution to the WMO Integrated Global Observing Systems (WIGOS) to improve services to society by increasing the data ...

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 WMO Intercomparison of High Quality Radiosonde Systems

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World Meteorological Organization (WMO) ; T. Oakley ; Holger Vömel ; Li Wei

Event: WMO Intercomparison of High Quality Radiosonde Systems (12 July – 3 August 2010; Yangjiang, China)

Published by: WMO ; 2011

The present report includes a detailed analysis of the QRS intercomparisons, a specific analysis of the SSI group, and draws conclusions and recommendations that are key information for the manufacturers, the NMHS as well as the scientific and climate community. Results show that unprecedented performances have been achieved with QRS while the expected performances to be reached with respect to the GRUAN specifications still require more research. This work is an essential contribution to the WMO Integrated Global Observing Systems (WIGOS) to improve services to society by increasing the data quality and consequently availability to improve outputs from models and provide information and products to support decision making at all levels.

Collection(s) and Series: WMO/TD- No. 1580; IOM Report- No. 107

Language(s): English

Format: CD, DVD, Digital (Free)

Tags: Radiosonde ; Instruments and Methods of Observation Programme (IMOP) Add tag

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IOM Report, 106. WMO Field Intercomparison of Thermometer Screens/Shields and Humidity Measuring Instruments : Ghardaïa, Algeria, November 2008 – October 2009

World Meteorological Organization (WMO) ; Bousri D.; Leroy M.; et al. - WMO, 2011 (WMO/TD-No. 1579)

The WMO Combined Intercomparison of Temperature Screens/Shields in Conjunction with Humidity Measuring Instruments was carried out in Ghardaïa, Algeria from November 2008 to October 2009, at the kind invitation of the Algerian Meteorological Service and under the leadership of CIMO. This intercomparison allowed testing the performance of the instruments in desert conditions, in a dry, hot and dusty environment. It was planned to carry out a follow-up intercomparison of similar instruments in an arctic environment at a later stage. The main objectives of this intercomparison were to gain knowle ...

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 WMO Field Intercomparison of Thermometer Screens/Shields and Humidity Measuring Instruments: Ghardaïa, Algeria, November 2008 – October 2009

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World Meteorological Organization (WMO) ; D. Bousri ; M. Leroy ; M. Mezred

Published by: WMO ; 2011

The WMO Combined Intercomparison of Temperature Screens/Shields in Conjunction with Humidity Measuring Instruments was carried out in Ghardaïa, Algeria from November 2008 to October 2009, at the kind invitation of the Algerian Meteorological Service and under the leadership of CIMO. This intercomparison allowed testing the performance of the instruments in desert conditions, in a dry, hot and dusty environment. It was planned to carry out a follow-up intercomparison of similar instruments in an arctic environment at a later stage. The main objectives of this intercomparison were to gain knowledge on the performance characteristics and operational factors of radiation screens/shields and humidity sensors. This included especially the reliability, accuracy and long-term stability of tested humidity sensors and the estimation of impact of radiation, wind speed, precipitation on humidity measurements inside the different screens/shields. An International Organizing Committee was set up to determine and agree on the rules of the intercomparison and to support its preparation and execution. The IOC was also tasked to agree on the procedures used for the evaluation of the results and to review and agree on their presentation in the final report of the intercomparison. This report presents in a detailed manner the procedures followed for the data acquisition and the analysis and a comparison of the performance of the instruments relative to the reference. It also contains datasheets for each of the participating instruments, which provide exhaustive information on their performances throughout the intercomparison period, and as a function of different parameters. A number of recommendations were drawn from the results and are directed to users (such as the type of shields to be preferred in desert conditions), to manufacturers, as well as to CIMO for its future activities and conduction of the follow-up intercomparison in arctic environment.

Collection(s) and Series: WMO/TD- No. 1579; IOM Report- No. 106

Language(s): English

Format: CD, DVD, Digital (Free)

Tags: Observations ; Hydrometeorological instrument ; Humidity ; Measure ; Instruments and Methods of Observation Programme (IMOP) Add tag

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JCOMM Technical Report, 53. The WMO-IOC Network of Regional Marine Instrument Centres (RMICS) : revision 1

World Meteorological Organization (WMO) ; Intergovernmental Oceanographic Commission (IOC) - WMO, 2010 (WMO/TD-No. 1564)

English

 The WMO-IOC Network of Regional Marine Instrument Centres (RMICS): revision 1

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World Meteorological Organization (WMO) ; Intergovernmental Oceanographic Commission

Published by: WMO ; 2010

Collection(s) and Series: WMO/TD- No. 1564; JCOMM Technical Report- No. 53

Language(s): English

Format: Digital (Free)

Tags: Joint WMO/ IOC Technical Commission for Oceanography and Marine Meteorology (JCOMM) ; Marine meteorology ; Hydrometeorological instrument ; Capacity development Add tag

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IOM Report, 103. Evaluation Scheme for Regional Instrument Centres and Other Calibration Laboratories

World Meteorological Organization (WMO) - WMO, 2010 (WMO/TD-No. 1545)

The calibration of instruments and the traceability of meteorological measurements to the International Standard (SI) of units are crucial to ensure the quality of meteorological observations and to meet the users’ requirements. Regional Instrument Centres (RICs) play a key role in this context, by providing calibration services to other Members of their Region. In view of the need to ensure the quality of the services provided by the RICs, and the need for strengthening of RICs, the WMO Executive Council requested CIMO to develop a mechanism for their continuous evaluation to ensure quality o ...

English

 Evaluation Scheme for Regional Instrument Centres and Other Calibration Laboratories

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World Meteorological Organization (WMO)

Published by: WMO ; 2010

The calibration of instruments and the traceability of meteorological measurements to the International Standard (SI) of units are crucial to ensure the quality of meteorological observations and to meet the users’ requirements. Regional Instrument Centres (RICs) play a key role in this context, by providing calibration services to other Members of their Region. In view of the need to ensure the quality of the services provided by the RICs, and the need for strengthening of RICs, the WMO Executive Council requested CIMO to develop a mechanism for their continuous evaluation to ensure quality of their services and to verify the traceability of the basic meteorological variables. This publication describes the first Evaluation Scheme developed for Regional Instrument Centre’s regular assessment. It was developed by a member of the CIMO Expert Team on Regional Instrument Centre, Mr Jérôme Duvernoy. This report explains how to use the Evaluation Scheme for Regional Instrument Centres and Other Calibration Laboratories that consists in an Excel Sheet. It describes briefly the background of the Evaluation Scheme, the user manual and provides some guidance on the ISO 17025 standard “General requirements for the competence of testing and calibration laboratories”. The Evaluation Scheme itself is based on the Terms of Reference of RICs and on the ISO 17025 standard on which they rely. The Evaluation Scheme has been prepared in a way to help users in maintaining or strengthening their quality management system. It contains three main parts in the form of a questionnaire, results and improvement advices. This IOM Report can be considered as a tool that is useful for the regular assessment of RICs, but also as a help to establish the quality system of a RIC or of a calibration laboratory. The main benefits of correctly implementing ISO/IEC 17025 in a RIC or a NMHSs’ calibration laboratory are the continuous improvement of calibration quality and laboratory effectiveness, which also improve the data quality of observing parameters exchanged within WIGOS, as well as the improved national and regional recognition of the laboratory.

Collection(s) and Series: WMO/TD- No. 1545; IOM Report- No. 103

Language(s): English

Format: CD, DVD, Digital (Free)

Tags: Precipitation forecasting ; Instruments and Methods of Observation Programme (IMOP) Add tag

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 CIMO IOM Reports No.95 to 103 (2010) 

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IOM Report, 102. CIMO Survey on national summaries of methods and instruments for solid precipitation measurement at automatic weather stations

World Meteorological Organization (WMO) ; Wong Kai - WMO, 2010 (WMO/TD-No. 1544)

This publication reports on the results of the CIMO survey, initiated in 2008, on the current methods, instruments and challenges for the measurement of solid precipitation at automatic weather stations. The current survey is the third in its category. It was built on the two previous surveys that were conducted by CIMO 10 and 20 years ago. Since then, the automatic stations have been providing an increased percentage of precipitation data, snow water equivalent, and depth of snow on the ground. The CIMO, at its 14th session, initiated this review to assess the methods for measurement and obse ...

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 CIMO Survey on national summaries of methods and instruments for solid precipitation measurement at automatic weather stations

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World Meteorological Organization (WMO) ; Kai Wong

Published by: WMO ; 2010

This publication reports on the results of the CIMO survey, initiated in 2008, on the current methods, instruments and challenges for the measurement of solid precipitation at automatic weather stations. The current survey is the third in its category. It was built on the two previous surveys that were conducted by CIMO 10 and 20 years ago. Since then, the automatic stations have been providing an increased percentage of precipitation data, snow water equivalent, and depth of snow on the ground. The CIMO, at its 14th session, initiated this review to assess the methods for measurement and observation of solid precipitation, snowfall and snow depth, at automatic, unattended stations in cold climate (polar and alpine). In that context, CIMO tasked the Expert Team on SurfaceBased Instrument Intercomparisons and Calibration Methods (ETSBII& CM) to conduct this work. This IOM Report, prepared by a member of the Expert Team, Ms Rodica Nitu as Lead author, and by Ms Kai Wong, provides the result of the analysis of the survey on National summaries of methods and instruments for solid precipitation measurement at automatic weather stations that was performed in 2008 to document and review the current methods, instruments and challenges of automatic solid precipitation measurements. The survey was prepared in a way to reflect the transition from manual to automatic observation of precipitation and to provide information on the extent of use of automation for measuring precipitation, the parameters monitored, the instruments used and their metadata, and the current development work taking place for improving the measurement of precipitation. This publication facilitates a better understanding of the global configuration of precipitation measurement and lays the ground for a proposed WMO intercomparison of instruments measuring solid precipitation.

Collection(s) and Series: WMO/TD- No. 1544; IOM Report- No. 102

Language(s): English

Format: CD, DVD, Digital (Free)

Tags: Precipitation forecasting ; Instruments and Methods of Observation Programme (IMOP) Add tag

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 CIMO IOM Reports No.95 to 103 (2010) 

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IOM Report, 101. Guidance on Instrumentation for Calibration Laboratories, including Regional Instrument Centres

World Meteorological Organization (WMO) - WMO, 2010 (WMO/TD-No. 1543)

Users of meteorological observations have increasing needs for high quality meteorological and hydrological data. The traceability of these data to the International System of Units (SI) standards is needed to ensure their quality and to meet the users’ requirements. Regional Instrument Centres, as well as NMHSs calibration laboratories are essential in ensuring data quality by providing calibration of the standards and traceability to SI. CIMOXIV recognized that RICs needed guidance on how to build calibration laboratories and purchase calibration equipment to strengthen their capabilities. T ...

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IOM Report, 100. Evaluation of the Survey on Lightning Detection Systems - Report on Current Operational Networks

World Meteorological Organization (WMO) - WMO, 2010 (WMO/TD-No. 1542)

This publication reports on the results of the CIMO survey on lightning detection systems. This survey was the first in its category. It was initiated by the CIMO in its 14th intersession period as part of a review of the current operational lightning detection systems networks used by Members, to assess the need and possibility to organize an intercomparison of such systems. In that context, CIMO charged the Expert Team on Remote Sensing UpperAir Technology and Techniques to conduct this work. This IOM Report, prepared by a member of the Expert Team, Mr Mohamed Dahoui provides the results of ...

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JCOMM Technical Report, 52. Eleventh International Workshop on Wave Hindcasting and Forecasting and Second Coastal Hazard Symposium

World Meteorological Organization (WMO) ; Intergovernmental Oceanographic Commission (IOC) - WMO, 2010 (WMO/TD-No. 1533)

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JCOMM Technical Report, 51. Ship Observations Team (SOT) annual report for 2009

World Meteorological Organization (WMO) ; Intergovernmental Oceanographic Commission (IOC) - WMO, 2010 (WMO/TD-No. 1525)

English

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JCOMM Technical Report, 49. Second Ice Analysts Workshop

World Meteorological Organization (WMO) ; Intergovernmental Oceanographic Commission (IOC) - WMO, 2009 (WMO/TD-No. 1517)

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IOM Report, 99. WMO Field Intercomparison of Rainfall Intensity Gauges

World Meteorological Organization (WMO) ; Monesi C.; Lanza L.; et al. - WMO, 2009 (WMO/TD-No. 1504)

The WMO Field Intercomparison of Rainfall Intensity Gauges was carried out in Vigna di Valle, Italy from October 2007 to April 2009, at the kind invitation of the Italian Meteorological Service. This intercomparison is following up on the Laboratory Intercomparison of Rainfall Intensity Gauges. CIMOXIV recommended that welldefined and accepted reference instruments and procedures were needed for the field intercomparison. CIMOXIV agreed that such reference might be based on a set of high quality devices applying different measuring techniques and had adopted a recommendation to that effect. Th ...

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IOM Report, 98. Sub-Regional Pyranometer Intercomparison of the RA VI members from South-Eastern Europe

World Meteorological Organization (WMO) - WMO, 2009 (WMO/TD-No. 1501)

This report presents the results from the SubRegional Pyranometer Intercomparison that was held for the Members of SouthEastern Europe at the kind invitation of Croatia.

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IOM Report, 97. Second WMO Regional Pyrheliometer Comparison of RA II

World Meteorological Organization (WMO) - WMO, 2009 (WMO/TD-No. 1494)

This report gives information about the Regional Pyrheliometer Comparison of the World Meteorological Organization (WMO) Regional Association (RA) II, held from 22 January to 2 February 2007 in Tsukuba, Japan with the participation of experts and pyrheliometers from China, Hong Kong, the Republic of Korea, Japan and the World Radiation Centre (WRC) in Davos, Switzerland.

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WCDMP, 71. Proceedings of the Fifth Seminar for Homogenization and Quality Control in Climatological Databases

World Meteorological Organization (WMO) - WMO, 2006 (WMO/TD-No. 1493)

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WCDMP, 70. Guidelines for Plant Phenological Observations

World Meteorological Organization (WMO) - WMO, 2009 (WMO/TD-No. 1484)

The technical document on the guidelines for plant phenological observations raises the benefits of these types of observations in monitoring the impact of the changing climate on an important biosphere element of the climate system which is vegetation. The content of the document was elaborated by experts in climatology and biometeorology in a multidisciplinary team work approach. The guidelines included in the document are based on scientifically recognized principles and good practices undertaken by several institutions having long experience in carrying out plant phonological observations ...

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