TITLE

A Climatology of Warm-Season Cloud Patterns over East Asia Based on GMS Infrared Brightness Temperature Observations

AUTHOR(S)
Wang, Chung-Chieh; Chen, George Tai-Jen; Carbone, Richard E.
PUB. DATE
July 2004
SOURCE
Monthly Weather Review;Jul2004, Vol. 132 Issue 7, p1606
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
In the present study, hourly infrared (IR) brightness temperatures observed by the Geostationary Meteorological Satellite (GMS) over the region 20°–40°N, 95°–145°E in May–August 1998–2001 are used to compile a climatology of warm-season cloud/precipitation episodes over east Asia. With a goal to better understand the characteristics of warm-season convection and the behavior of these episodes, results are compared with those obtained in North America using radar-derived data. The convection in east Asia, similar to that in North America, is shown to also exhibit coherent patterns and characteristics of propagating events in the longitude–time (Hovmöller) space, with a preferred phase speed of ∼10–25 m s-1, considerably faster than warm-season synoptic-scale waves. Near the eastern edge of the Tibetan Plateau, convection was most active with a strong diurnal signal, peaking in late afternoon or early evening then propagating eastward. The zonal span and duration of episodes could reach 3000 km and 45 h, respectively, also well exceeding the scale of individual convective systems and thereby suggesting an intrinsic predictability. Beside the coherent patterns of propagation, effects/modulations of synoptic waves, monsoon circulations, mei-yu fronts, and tropical systems on the convection were also discernable. In east Asia, unlike North America, however, propagation was strongest in May–June and almost ceased in midsummer. Further studies are needed to clarify the reasons for this apparent difference. Based on the coherency of cloud/precipitation episodes, statistical methods can be developed in both North America and east Asia to aid precipitation forecasts in the future.
ACCESSION #
13719563

 

Related Articles

  • The Diurnal Cycle of Clouds and Precipitation along the Sierra Madre Occidental Observed during NAME-2004: Implications for Warm Season Precipitation Estimation in Complex Terrain. Nesbitt, Stephen W.; Gochis, David J.; Lang, Timothy J. // Journal of Hydrometeorology;Aug2008, Vol. 9 Issue 4, p728 

    This study examines the spatial and temporal variability in the diurnal cycle of clouds and precipitation tied to topography within the North American Monsoon Experiment (NAME) tier-I domain during the 2004 NAME enhanced observing period (EOP, July–August), with a focus on the...

  • Assessing the Skill of Yes/No Forecasts for Markov Observations. Briggs, William; Ruppert, David // Monthly Weather Review;Sep2006, Vol. 134 Issue 9, p2601 

    Briggs and Ruppert recently introduced a new, easy-to-calculate economic skill/value score for use in yes/no forecast decisions, of which precipitation forecast decisions are an example. The advantage of this new skill/value score is that the sampling distribution is known, which allows one to...

  • Toward Improved Prediction: High-Resolution and Ensemble Modeling Systems in Operations. Roebber, Paul J.; Schultz, David M.; Colle, Brian A.; Stensrud, David J. // Weather & Forecasting;Oct2004, Vol. 19 Issue 5, p936 

    A large gap in skill between forecasts of the atmospheric circulation (relatively high skill) and quantitative precipitation (low skill) has emerged over the past three decades. One common approach toward closing this gap has been to try to simulate precipitation features directly by decreasing...

  • The Use and Misuse of Conditional Symmetric Instability. Schultz, David M.; Schumacher, Philip N. // Monthly Weather Review;Dec99, Vol. 127 Issue 12, p2709 

    A commonly employed explanation for single- and multiple-banded clouds and precipitation in the extratropics is slantwise convection due to the release of moist symmetric instability (MSI), of which one type is conditional symmetric instability (CSI). This article presents a review of CSI with...

  • Predictability of Precipitation in a Cloud-Resolving Model. Walser, André; Lüthi, Daniel; Schär, Christoph // Monthly Weather Review;Feb2004, Vol. 132 Issue 2, p560 

    An ensemble methodology is developed and tested to objectively isolate and quantify meso-β-scale predictability limitations in numerical weather prediction (NWP). The methodology involves conducting an ensemble of limited-area simulations with slightly modified initial conditions...

  • Calibrated Precipitation Forecasts for a Limited-Area Ensemble Forecast System Using Reforecasts. Fundel, Felix; Walser, Andre; Liniger, Mark A.; Frei, Christoph; Appenzeller, Christof // Monthly Weather Review;Jan2010, Vol. 138 Issue 1, p176 

    The calibration of numerical weather forecasts using reforecasts has been shown to increase the skill of weather predictions. Here, the precipitation forecasts from the Consortium for Small Scale Modeling Limited Area Ensemble Prediction System (COSMO-LEPS) are improved using a 30-yr-long set of...

  • Warm Season Mesoscale Superensemble Precipitation Forecasts in the Southeastern United States. Cartwright, T. J.; Krishnamurti, T. N. // Weather & Forecasting;Aug2007, Vol. 22 Issue 4, p873 

    With current computational limitations, the accuracy of high-resolution precipitation forecasts has limited temporal and spatial resolutions. However, with the recent development of the superensemble technique, the potential to improve precipitation forecasts at the regional resolution exists....

  • A method for statistical downscaling of seasonal ensemble predictions. Feddersen, Henrik; Andersen, Uffe // Tellus: Series A;May2005, Vol. 57 Issue 3, p398 

    A model output statistics based method for downscaling seasonal ensemble predictions is outlined, and examples of ensemble predictions of precipitation and 2-m temperature are verified against observing stations in Scandinavia, Europe, north-western America, the contiguous United States and...

  • Forecasting with reference to a specific climatology. WALLACE, EMILY; ARRIBAS, ALBERTO // Monthly Weather Review;Nov2012, Vol. 140 Issue 11, p3795 

    Seasonal forecasts are most commonly issued as anomalies with respect to some multi-year reference period. However, different seasonal forecasting centres use different reference periods. This paper shows that for near surface temperature, precipitation and mean sea-level pressure, over most...

Share

Read the Article

Courtesy of THE LIBRARY OF VIRGINIA

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

Try another library?
Sign out of this library

Other Topics