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IOM Report, 128. Interlaboratory Comparison in the field of Temperature, Humidity and Pressure, in the WMO Regional Association VI (MM-ILC-2015-THP)
The subject of this report is evaluation of the interlaboratory comparison in the field of measurement of temperature, humidity and pressure. The interlaboratory comparison was held within the framework of the MeteoMet 2 project, in the scope of proficiency testing scheme organized by the University of Ljubljana, Faculty of Electrical Engineering, Laboratory of Metrology and Quality (UL-FE/LMK), except pressure part. All the analysis were done in accordance with accredited procedures.
Diagnosis Of Extreme Rainfall And Temperature Event Over Rwanda (1961-2010)
This study attempted to investigate the variability of extreme rainfall and temperature over Rwanda and the associated circulation anomalies forecasting on wet and dry rainfall events between 1961 and 2010. The datasets used to achieve the objectives includes Temperature, the rainfall dataset, wind vector, pressure vertical velocity (omega) and the Indian Ocean sea surface temperature (SST). The methods used include correlation analysis, Standardized anomaly, composite analysis, and Empirical Orthogonal Functions (EOF) analysis. The results show that the mean annual cycle depict two rainy Seas ...
IOM Report, 121. Measurement of upper-air pressure, temperature and humidity
This report is that document, as authored by Dr Nash, in all its original detail. Starting with the existing version of the CIMO Guide (2010 update) Dr Nash revised that information, primarily to include the additional understanding gained from the Yangjiang intercomparison. At the same time, though, he added a wealth of further specialist knowledge, gained from his protracted involvement in WMO CIMO activities over more than thirty years, and in particular from his participation in all eight CIMO international radiosonde intercomparisons, commencing with the first, held at Bracknell in 1983.< ...
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The World's Hottest Temperature Cools A Bit
2012An evaluation team of investigators from the World Meteorological Organization, headed by ASU's Randy Cerveny, has disqualified the world-record temperature of 58 deg C from El Aizia, Libya in 1922 and replaced with a reading of 134 deg F from Death Valley, California from 1913.
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CAWCR technical report, 50. On the sensitivity of Australian temperature trends and variability to analysis methods and observation networks
Fawcett R.J.B.; Trewin B.; Braganza K.; et al. - Centre for Australian Weather and Climate Research, 2012This report presents an exploration of Australian temperature trends and variability using the new Australian Climate Observations Reference Network (ACORN) Surface Air Temperature (SAT) dataset. We compare changes in nationally and annually averaged daily-maximum, dailyminimum and daily-mean temperature variability to a range of alternative Australian temperature analyses over the last 100 years (1911-2010).
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CAWCR technical report, 49. Techniques involved in developing the Australian Climate Observations Reference Network - Surface Air Temperature (ACORN-SAT) dataset
The Australian Climate Observations Reference Network – Surface Air Temperature (ACORNSAT) data set is a long-term data set of Australian daily air temperature, covering the period from 1910 to the present. The purpose of this data set is to provide the best possible data set to underlie analyses of variability and change of temperature in Australia, including both analyses of annual and seasonal mean temperatures, and of extremes of temperature and other information derived from daily temperatures. A full discussion of the motivation underlying the ACORN-SAT data set is contained in a compani ...
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Regional temperature and precipitation changes under high-end (≥4°C) global warming
Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, Vol. 369. N° 1934. Sanderson M.G.; Hemming D.L.; Betts R.A. - The Royal Society, 2011Climate models vary widely in their projections of both global mean temperature rise and regional climate changes, but are there any systematic differences in regional changes associated with different levels of global climate sensitivity? This paper examines model projections of climate change over the twenty-first century from the Intergovernmental Panel on Climate Change Fourth Assessment Report which used the A2 scenario from the IPCC Special Report on Emissions Scenarios, assessing whether different regional responses can be seen in models categorized as ‘high-end’ (those projecting 4°C o ...
Empirical analysis of temperature change in Sri Lanka during the last 140 years (1871-2010)
Sujeewa Kanda Durage; Institute of Environmental Science and Meteorology ; College of Science - University of the Philippines, 2011Climatologists and meteorologists in Sri Lanka observe that ground temperature measurements in many weather stations have risen and people are experiencing more episodes of warmer weather. Sri Lanka is a country vulnerable to warming or rise in temperature; in particular its economic development is mostly dependent on agriculture, which can be severely affected by large and abrupt changes in temperature. This study was carried out to detect and characterize changes in surface temperature in the last 140 years, as a precursor of climate change in Sri Lanka. Daily maximum and minimum temperature ...
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Spring Cold Bias of SST and Minimal Wind Mixing in the Equatorial Pacific Cold Tongue
Atmospheric and Oceanic Science Letters, Volume 3 Number 6. Lin Peng-Fei; Liu Hai-Long; Li Chao; et al. - Science Press, 2010The authors investigate the relationship between bias in simulated sea surface temperature (SST) in the equatorial eastern Pacific cold tongue during the boreal spring as simulated by an oceanic general circulation model (OGCM) and minimal wind mixing (MWM) at the surface. The cold bias of simulated SST is greatest during the boreal spring, at approximately 3°C. A sensitivity experiment reducing MWM by one order of magnitude greatly alleviates cold biases, especially in March-April. The decrease in bias is primarily due to weakened vertical mixing, which preserves heat in the uppermost layer a ...
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Interannual Variability of Snow Depth over the Tibetan Plateau and Its Associated Atmospheric Circulation Anomalies
The interannual variability of wintertime snow depth over the Tibetan Plateau (TP) and related atmospheric circulation anomalies were investigated based on observed snow depth measurements and NCEP/NCAR reanalysis data. Empirical orthogonal function (EOF) analysis was applied to identify the spatio-temporal variability of wintertime TP snow depth. Snow depth anomalies were dominated by a monopole pattern over the TP and a dipole structure with opposite anomalies over the southeastern and northwestern TP. The atmospheric circulation conditions responsible for the interannual variability of TP s ...
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Kolmogorov Constants of Atmospheric Turbulence over a Homogeneous Surface
Atmospheric and Oceanic Science Letters, Volume 3 Number 4. Cheng Xue-Ling; Wang Bing-Lan; Hu Fei; et al. - Science Press, 2010In this paper, the authors use ultrasonic data over a homogeneous surface to calculate the Kolmogorov constants of velocity, temperature, CO2, and water vapor. The authors find that the constants are all within the range determined by former experiments and that they are universally independent of the stability.
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No. 25 - July 2010 - Climate change
The present issue of Spatium is devoted to climate change, to the most evident scientific observations corroborating global warming and the outstanding rate at which the global mean temperature is rising. Then, it presents some projections into the future under various more or less optimistic assumptions regarding mankind’s ability to counteract the climate threat. Finally, it will high light some measures taken so far which, unfortunately, are still far from being sufficient to keep the Earth’s climate under control.
Temperature trends in the lower atmosphere : steps for understanding and reconciling differences
Karl Thomas R.; Hassol Susan J.; Murray William L.; et al. - Executive Office of the President of the United States, 2006Previously reported discrepancies between the amount of warming near the surface and higher in the atmosphere have been used to challenge the reliability of climate models and the reality of humaninduced global warming. Specifically, surface data showed substantial global-average warming, while early versions of satellite and radiosonde data showed little or no warming above the surface. This significant discrepancy no longer exists because errors in the satellite and radiosonde data have been identified and corrected. New data sets have also been developed that do not show such discrepancies. ...
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Seasonal prediction of sea surface temperatures anomalies using a suite of 13 coupled atmosphere-ocean models
Improved seasonal prediction of sea surface temperature (SST) anomalies over the global oceans is the theme of this paper. Using 13 state-of-the-art coupled global atmosphere-ocean models and 13 yr of seasonal forecasts, the performance of individual models, the ensemble mean, the bias-removed ensemble mean, and the Florida State University (FSU) superensemble are compared. A total of 23 400 seasonal forecasts based on 1-month lead times were available for this study. Evaluation metrics include both deterministic and probabilistic skill measures, such as verification of anomalies based on mode ...
The effect of temperature on the citrus crop
Temperature is the most important climatic determinant of citriculture. Citrus trees are threatened by frost and freeze hazards as well as by high temperatures. This report is mainly confined to temperature effects on citrus crop and includes a list of a wide range of references.
Measurement of temperature and humidity : specification, construction, properties and use of the WMO reference psychrometer
World Meteorological Organization (WMO) ; Lalas Theo; Commonwealth Scientific and Industrial Research Organisation (CSIRO) - WMO, 1992 (WMO-No. 759)This publication serves as a specification for the design and construction of the WMO Reference Psychrometer. It describes how it must be operated in the laboratory and in the field to obtain measurements of air temperature and humidity with very high accuracy. A set of working drawings is included.
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