Theory and Applications of the Minimum Spanning Tree Rank Histogram

Gombos, Daniel; Hansen, James A.; Du, Jun; McQueen, Jeff
April 2007
Monthly Weather Review;Apr2007, Vol. 135 Issue 4, p1490
Academic Journal
A minimum spanning tree (MST) rank histogram (RH) is a multidimensional ensemble reliability verification tool. The construction of debiased, decorrelated, and covariance-homogenized MST RHs is described. Experiments using Euclidean L2, variance, and Mahalanobis norms imply that, unless the number of ensemble members is less than or equal to the number of dimensions being verified, the Mahalanobis norm transforms the problem into a space where ensemble imperfections are most readily identified. Short-Range Ensemble Forecast Mahalanobis-normed MST RHs for a cluster of northeastern U.S. cities show that forecasts of the temperature–humidity index are the most reliable of those considered, followed by mean sea level pressure, 2-m temperature, and 10-m wind speed forecasts. MST RHs of a Southwest city cluster illustrate that 2-m temperature forecasts are the most reliable weather component in this region, followed by mean sea level pressure, 10-m wind speed, and the temperature–humidity index. Forecast reliabilities of the Southwest city cluster are generally less reliable than those of the Northeast cluster.


Related Articles

  • Verification of Operational Analyses Using an Extremely High-Density Surface Station Network. Kann, Alexander; Haiden, Thomas; von der Emde, Klaus; Gruber, Christine; Kabas, Thomas; Leuprecht, Armin; Kirchengast, Gottfried // Weather & Forecasting;Aug2011, Vol. 26 Issue 4, p572 

    Operational analyses of 2-m temperature, 2-m humidity, and 10-m wind speed are verified independently against observations obtained from the WegenerNet, an extremely high-density, grid-type surface station network in southeastern Austria with an average distance between stations of 1.4 km. The...

  • Numerical Simulation of Micro-atmospheric Environment by LES in a District of Beijing. Liu, Y. S.; Miao, S. G.; Zhang, C. L.; Cui, G. X.; Zhang, Z. S. // AIP Conference Proceedings;9/28/2011, Vol. 1376 Issue 1, p392 

    This paper investigates wind field and traffic pollutant dispersion at street level in a local urban area. A coupling method is employed between the mesoscale model weather research and forecast (WRF) for the atmospheric flow of whole city and the large eddy simulation (LES) method for local...

  • Impacts of Satellite-Observed Winds and Total Precipitable Water on WRF Short-Range Forecasts over the Indian Region during the 2006 Summer Monsoon. Rakesh, V.; Singh, Randhir; Pal, P. K.; Joshi, P. C. // Weather & Forecasting;Dec2009, Vol. 24 Issue 6, p1706 

    Assimilation experiments have been performed with the Weather Research and Forecasting (WRF) model’s three-dimensional variational data assimilation (3DVAR) scheme to assess the impacts of NASA’s Quick Scatterometer (QuikSCAT) near-surface winds, and Special Sensor Microwave Imager...

  • Variational Assimilation of Cloud Liquid/Ice Water Path and Its Impact on NWP. Chen, Yaodeng; Wang, Hongli; Min, Jinzhong; Huang, Xiang-Yu; Minnis, Patrick; Zhang, Ruizhi; Haggerty, Julie; Palikonda, Rabindra // Journal of Applied Meteorology & Climatology;Aug2015, Vol. 54 Issue 8, p1809 

    Analysis of the cloud components in numerical weather prediction models using advanced data assimilation techniques has been a prime topic in recent years. In this research, the variational data assimilation (DA) system for the Weather Research and Forecasting (WRF) Model (WRFDA) is further...

  • AN EXPLORATORY ANALYSIS OF PM10 PARTICULATE MATTER RELATIONSHIPS WITH WEATHER DATA AND SPATIAL VARIATION. Dunea, Daniel // Proceedings of the International Multidisciplinary Scientific Ge;2014, Vol. 2, p273 

    The main aim of the paper was to explore the interrelationships between PM10 time series and various weather parameters i.e. air temperature, atmospheric pressure, relative humidity, solar radiation, and wind speed, recorded hourly at six automated monitoring stations located in Oltenia...

  • An Assessment of the Microbiological Quality and Physical Properties of Indoor Atmosphere in Port Harcourt. ALERUCHI, CHUKU // Journal of Applied Sciences & Environmental Management;Sep2011, Vol. 15 Issue 3, p507 

    The assessment of microbiological quality and some properties of indoor atmosphere in Port Harcourt were carried out at seven different sites. Air samples were collected from these sites during the rainy and dry seasons as well as day and night periods. Microbiological identification tests were...

  • Effects of ambient air temperature, humidity, and wind speed on seminal traits in Braford and Nellore bulls at the Brazilian Pantanal. Menegassi, Silvio; Pereira, Gabriel; Bremm, Carolina; Koetz, Celso; Lopes, Flávio; Fiorentini, Eduardo; McManus, Concepta; Dias, Eduardo; Rocha, Marcela; Lopes, Rubia; Barcellos, Júlio // International Journal of Biometeorology;Nov2016, Vol. 60 Issue 11, p1787 

    The aim of this study was to evaluate the bioclimatic thermal stress assessed by Equivalent Temperature Index (ETI) and Temperature Humidity Index (THI) on Braford and Nellore bulls sperm quality during the reproductive seasons at the tropical region in the Brazilian Pantanal. We used 20 bulls...

  • Evaluating the Adequacy of Simulating Maximum and Minimum Daily Air Temperature with the Normal Distribution. Harmel, R. D.; Richardson, C. W.; Hanson, C. L.; Johnson, G. L. // Journal of Applied Meteorology;Jul2002, Vol. 41 Issue 7, p744 

    Weather simulation models are commonly used to generate synthetic daily weather for use in studies of crop growth, water quality, water availability, soil erosion, climate change, and so on. Synthetic weather sequences are needed if long-term measured data are not available, measured data...

  • Low-Level Easterly Winds Blowing through the Tsugaru Strait, Japan. Part II: Numerical Simulation of the Event on 5-10 June 2003. Shimada, Teruhisa; Sawada, Masahiro; Sha, Weiming; Kawamura, Hiroshi // Monthly Weather Review;Jun2012, Vol. 140 Issue 6, p1779 

    This paper investigates the structures of and diurnal variations in low-level easterly winds blowing through the Tsugaru Strait and Mutsu Bay on 5-10 June 2003 using a numerical weather prediction model. Cool air that accompanies prevailing easterly winds owing to the persistence of the Okhotsk...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics