TMI rain rate estimation over land and ocean utilizing convective and stratiform discrimination

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National Aeronautics and Space Administration, Goddard Space Flight Center, National Technical Information Service, distributor , Greenbelt, Md, [Springfield, Va
Meteorological radar., Microwave imagery., TRMM satellite., Rain., Tropical meteorology., Precipitation (Meteorology), Meteorological parameters., Tropical reg
StatementC. Prabhakara ... [et al.].
SeriesNASA/TM -- 1999-209479., NASA technical memorandum -- 209479.
ContributionsPrabhakara, Cuddapah., Goddard Space Flight Center.
The Physical Object
FormatMicroform
Pagination1 v.
ID Numbers
Open LibraryOL15559338M

An illustration of an open book. Books. An illustration of two cells of a film strip. Video An illustration of an audio speaker. TMI Rain Rate Estimation Over Land and Ocean Utilizing Convective and Stratiform Discrimination Item Preview remove-circle. TMI Rain Rate Estimation Over Land and Ocean Utilizing Convective and Stratiform Discrimination: NTRS Full-Text: View Document [PDF Size: MB]: Author and Affiliation:Author: C.

Prabhakara, R.

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Iacovazzi, J. Weinman, G. Dalu. TMI rain rate estimation over land and ocean utilizing convective and stratiform discrimination (OCoLC) Online version: Prabhakara, Cuddapah.

TMI rain rate estimation over land and ocean utilizing convective and stratiform discrimination (OCoLC) Material Type: Government publication, National government publication: Document. TMI Rain Rate Estimation Over Land and Ocean Utilizing Convective and Stratiform Discrimination. produced by scattering, correspond to local PR rain maxima.

Utilizing the PR rain rate map as a guide, we infer from TMI data the presence of three different kinds of thunderstorms or Cbs. They are young, mature, and decaying Cbs that have a.

A TRMM Microwave Radiometer Rain Rate Estimation Method with Convective and Stratiform Discrimination. tuned utilizing the PR and TMI data of a few MCS events. of over-land rain-rate.

The PR rain estimates are used here for calibrating an overland TMI rain algorithm. The algorithm consists of 1) multichannel-based rain screening and convective/stratiform (C/S) classification schemes, and 2) nonlinear (linear) regressions for the rain-rate retrieval of stratiform (convective) rain.

The rain retrieval algorithm includes distinctly different methods for land and ocean. Over ocean, the algorithm derives the surface rainfall by using the TMI measured microwave radiances at 10,19,22, 37, and 85 GHz and a database of hydrometeor profiles from cloud resolving model simulations.

The four panels are for stratiform rain (stratiform rain fraction >80%) over the ocean, for convective rain (convective rain fraction >50%) over the ocean, for stratiform rain over land, and for convective rain over land, respectively.

The abscissa is PR rain rate at 3 km, and the ordinate is TMI-Tb 85GHzV. Finally, the rain rate associated with a typhoon was estimated by inputting the observations of the TMI (attenuation indices at 10, 19, 37 GHz) into the posterior PDF (lookup table).

Results based on rain rate retrievals indicated that rainband locations with the heaviest. transition from convective to stratiform rain.

Later, many researchers reported the existence of a transition region between the convective and stratiform regimes [7{10].

Bringi et al. [11] used a simple scheme to separate stratiform and convective rain types based on the standard deviation of rain rate over 5 consecutive DSD samples. A standard.

rain are 78%, 12%, and 10% for V5 stratiform, convective and other rain types, respectively, and 80%, 17%, and 3%, for the corresponding V6 products.

The Convective category in V6 includes a larger portion of shallow precipitation and the percentage of the “others” rain type is much reduced.

The V6 TPR algorithm has undergone the largest. could be used in both stratiform and convective rain regions of tropical cyclones without obvious bias. Marks () has investigated the evolution of precipitation structure of Hurricane Allen () by using airborne radar rainfall estimation.

In this study, the SFMR rain rate measurements in tropical cyclones are evaluated against airborne radar. Two sizes of tipping-bucket rain gauge are generally used: mm and mm. The World Meteorological Association recommends a minimum unit of observation of mm increments, possibly in units of mm.

For the calculation of rainfall rate using the rain gauge, min tip data were converted to 1 min rainfall rates (mm h 1) using a moving. Convective/Stratiform Estimation [17] For each TMI pixel corresponding to a ° grid box of the PR product, several convective rainfall predictors were extracted and tested for their utility in estimating the convective percentage estimated by the PR.

These methods are taken from previous work and will be described briefly here. test strategies for assimilating TMI-retrieved rainfall rates. Two groups of sensitivity studies Fig.

Rain rates (mm/hr) for two TMI swathes that passed over the Hurricane Bonnie () around a) UTC 22 August and b) UTC 22 October Z. PU and W.-K. TAO (especially over the ocean), a result that is hypothesized to be due to the influence of more variable storm environments and the presence of frontal rain.

Melting-layer effects in stratiform rain and a bias in the ice-scattering–rain relationship were linked to the TMI producing more rainfall than the. Capsoni C, et al.

Description TMI rain rate estimation over land and ocean utilizing convective and stratiform discrimination EPUB

A new prediction model of rain attenuation that separately accounts for stratiform and convective rain.

IEEE Trans Antennas Propag. ; 57 (1)– doi: /TAP Chebil J, Rahman TA. Rain rate statistical conversion for the prediction of rain. The convective rain structure becomes dominant after ∼ mm/min rain‐rate, which is the breakpoint rain‐rate with exceedance ∼%. This indicates that less than 1% of the total rain at the measurement site is mainly convective.

This may be due to the physical size of the island and the close proximity of the site to the ocean. Heavy Convective Rainfall Forecasting: A Comprehensive Look at Parameters, Processes, Patterns, and Rules of Thumb Ted Funk Science and Operations Officer WFO Louisville, KY Ted Funk Science and Operations Officer WFO Louisville, KY The heaviest convective rainfall usually occurs in regions of high moisture, maximum ambient or elevated instability.

TMI rain rate estimation over land and ocean utilizing convective and stratiform discrimination / by: Prabhakara, Cuddapah, Published: () The analysis of polar clouds from AVHRR satellite data using pattern recognition techniques final report / by: Smith, William L.

Published: (). the rain in urban environment for a longer time in the hot season as shown in figure 1. figure 1. rain water accumulation basin in town park Placa de les corts, Barcelona (Photo: nieks, ). accumulation helps to ensure a pleasant humidity after the rain in urban environment for a longer time in the hot season as shown in Figure 1.

• Distinct two regimes of convective heating with TRMM‐PR based Q1‐QR; a cumulus congestus rain with a peak at ~2km, and with a peak for deep organized rain at ~8km. • Under large‐scale subsidence, cumulus congestus rain dominates over ocean, but not over land. In addition, as explained in Carr et al., TRMM TMI tends to underestimate the number of primarily stratiform events while overestimating the number of primarily convective events over land.

Therefore, uncertainties exist in TMI retrievals, especially over land under strong convection or mixed stratiform‐convective precipitation events. Scatter plot of concurrent observations of brightness temperature over the Bay of Bengal during July at GHz (V) from TRMM TMI and rain rate from TRMM precipitation radar (PR) for (A) convective and (B) stratiform rain.

The red line shows the average plot, whereas the green line shows the radiative transfer model simulated variation. Striations at light rain rates occur because the data contain discrete values of daily rain rate for light rain over the ocean.

(contributed by A. Pendergrass) Comparison of TMPA 3B43V7, TMPA V6, and GPCP v precipitation timeseries (5-month running average) over 50NS. The Office of Satellite and Product Operations (OSPO) is part of the National Environmental Satellite Data and Information Service (NESDIS).

NESDIS is part of the National Oceanic and Atmospheric Administration (NOAA), and the Department of Commerce. For pixel 2, the rain rates areand mm h −1, respectively, for GPROF, 1D‐Var FG and analysis.

The analysis rain rate is reduced from FG and moves closer to the GPROF retrieval. The FG has large negative T b biases for all channels, as seen in Table 2, indicating too much emission from liquid compared with the observation.

Stratiform rain. Convective rain Vice. Often rain reaches the ground within ½ hours of cloud formation. Rainfall estimation over the Taiwan Island from TRMM/TMI data Wann-Jin Chen1, Ming-Da Tsai1, Gin-Rong Liu2, Jen-Chi Hu1 and Mau-Hsing Chang1 1Dept.

of Applied Physics, Chung Cheng Institute of Technology, National Defense University 2Center for Space and Remote Sensing Research, National Central University I. Introduction The Taiwan is a mountainous island, recent. Prabhakara's 49 research works with citations and 1, reads, including: Global warming evidence from satellite observations.

Details TMI rain rate estimation over land and ocean utilizing convective and stratiform discrimination PDF

Abstract [1] A method for retrieving precipitation over the ocean using spaceborne W-band (94 GHz) radar is introduced and applied to the CloudSat Cloud Profiling Radar. The method is most applicable to stratiform-type precipitation.

Measurements of radar backscatter from the ocean surface are combined with information about surface wind speed and sea surface temperature to .Currently, rainfall retrieval over ocean from passive microwave satellite observations represents the best compromise between estimation accuracy and spatial data coverage.

Infrared data is available with higher temporal frequency from geostationary satellites but the link of top-of-the-atmosphere in.feasibility of the process.

Also, within a system of eminently convective origin, it is possible to find rain of stratiform character. Indeed, in certain situations, the contribution of stratiform precipitation to the total precipitation within a Mesoscale Convective System can be as great as 50% (Doswell, ).