Comparison between the Large-Scale Environments of Moderate and Intense Precipitating Systems in the Mediterranean Region

Funatsu, Beatriz M.; Claud, Chantal; Chaboureau, Jean-Pierre
November 2009
Monthly Weather Review;Nov2009, Vol. 137 Issue 11, p3933
Academic Journal
A characterization of the large-scale environment associated with precipitating systems in the Mediterranean region, based mainly on NOAA-16 Advanced Microwave Sounding Unit (AMSU) observations from 2001 to 2007, is presented. Channels 5, 7, and 8 of AMSU-A are used to identify upper-level features, while a simple and tractable method, based on combinations of channels 3–5 of AMSU-B and insensitive to land–sea contrast, was used to identify precipitation. Rain occurrence is widespread over the Mediterranean in wintertime while reduced or short lived in the eastern part of the basin in summer. The location of convective precipitation shifts from mostly over land from April to August, to mostly over the sea from September to December. A composite analysis depicting large-scale conditions, for cases of either rain alone or extensive areas of deep convection, is performed for selected locations where the occurrence of intense rainfall was found to be important. In both cases, an upper-level trough is seen to the west of the target area, but for extreme rainfall the trough is narrower and has larger amplitude in all seasons. In general, these troughs are also deeper for extreme rainfall. Based on the European Centre for Medium-Range Weather Forecasts operational analyses, it was found that sea surface temperature anomalies composites for extreme rainfall are often about 1 K warmer, compared to nonconvective precipitation conditions, in the vicinity of the affected area, and the wind speed at 850 hPa is also stronger and usually coming from the sea.


Related Articles

  • The Driest Place on Earth: The Atacama Desert. Lannom, Gloria W. // Faces;Mar2012, Vol. 28 Issue 6, p20 

    The article offers information on weather conditions in Atacama Desert. It states that Atacama Desert is a rainshadow desert . Because the moist air from the Pacific Ocean is squeezed as rain when the air rises over Caosta mountains and when the air comes to Atacama side, it does not contain...

  • Features of rainfall and latent heating structure simulated by two convective parameterization schemes. Wang, XiaoCong; Bao, Qing; Liu, Kun; Wu, GuoXiong; Liu, YiMin // SCIENCE CHINA Earth Sciences;Nov2011, Vol. 54 Issue 11, p1779 

    Using the latest version of SAMIL (Spectral Atmosphere Model of IAP LASG) developed by LASG/IAP, we evaluate the model performance by analyzing rainfall, latent heating structure and other basic fields with two different convective parameterization schemes: Manabe Scheme and Tiedtke Scheme....

  • Fluctuation Properties of Precipitation. Part IV: Finescale Clustering of Drops in Variable Rain. Jameson, A.R.; Kostinski, A.B. // Journal of the Atmospheric Sciences;1/1/99, Vol. 56 Issue 1, p82 

    Part IV. Studies the fluctuation properties of precipitation in the clustering drops of variable rain. Instrument used for the study; Background about the correlation of properties in single size; Correlations among drops of different sizes; Information on the measurement of drop size...

  • Fluctuation Properties of Precipittion. Part III: One the Ubiquity and Emergence of the... Kostinski, A.B.; Jameson, A.R. // Journal of the Atmospheric Sciences;1/1/99, Vol. 56 Issue 1, p111 

    Examines the ubiquity and emergence of the exponential drop size spectra in the fluctuation properties precipitation. Formulation of stochastic point of view of the study; Stochastic implications of the exponential density; Conditions required for the emergence of the limiting PDF; Rates of...

  • On the potential impact of irrigated areas in North American on summer rainfall caused by large-... Segal, M.; Pan, Z. // Journal of Applied Meteorology;Mar98, Vol. 37 Issue 3, p325 

    Evaluates the potential impact of the increase in irrigated areas in North American since 1898 on summer rainfall associated with medium- to large-scale precipitation. Efforts to estimate global rainfall; Increase in irrigated acreage in North America; Indication that summer rainfall increase...

  • Weather.  // Confederated Umatilla Journal;Aug2014, Vol. 17 Issue 8, p8 

    The article offers information on the weather condition taken from the Pendleton Weather Station in Oregon from July 1 to 31, 2014 including the total precipitation, average daily temperature and average wind speed.

  • Potential effects of acid precipitation on soils in the humid temperate zone. Frink, C.; Voigt, G. // Water, Air & Soil Pollution;Mar1977, Vol. 7 Issue 3, p371 

    Unmanaged soils in the northeast United States generally tend toward increasing acidity which results from several natural processes in the soil. Possible effects of acid precipitation on these processes may be caused by hydrogen ions associated with excess anions in the precipitation and, in...

  • About the variability in thunderstorm and rainfall activity over India and its association with El Niño and La Niña. Kulkarni, M. K.; Revadekar, J. V.; Varikoden, Hamza // Natural Hazards;Dec2013, Vol. 69 Issue 3, p2005 

    Thunderstorms are of much importance in tropics, as this region is considered to have central role in the convective overturn of the atmosphere and play an important role in rainfall activity. It is well known that El Niño and La Niña are well associated with significant climate anomalies...

  • Impact of variational assimilation technique on simulation of a heavy rainfall event over Pune, India. Yesubabu, V.; Islam, Sahidul; Sikka, D.; Kaginalkar, Akshara; Kashid, Sagar; Srivastava, A. // Natural Hazards;Mar2014, Vol. 71 Issue 1, p639 

    Prediction of heavy rainfall events due to severe convective storms in terms of their spatial and temporal scales is a challenging task for an operational forecaster. The present study is about a record-breaking heavy rainfall event observed in Pune (18°31′N, 73°55′E) on...


Read the Article


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

Try another library?
Sign out of this library

Other Topics