The numerical simulation of mesoscale precipitation as well as the development of software and appropriate computer techniques are investigated. The development of a mesoscale model and the means to incorporate meteorological data into the model are examined

Kalb, M. W.

English

NASA Technical Reports Server

TITLE: Numerical S imu la t ion  o f  Mesoscale P r e c i p i t a t i o n  
RESEARCH INVESTIGATOR: 
Michael W. Kalb 
U n i v e r s i t i e s  Space Research Assos ia t i on  
Atmospheric Sciences D i  v i  s i o n  
NASA/ MSFC Alabama 35812 (205) 453-5532 
SIGNIFICANT ACCOMPLISHMENTS FY-83: 
1. 
2. 
3. 
4. 
The NCAR graphics system has been implemented on t h e  ASD Perk in-  
Elmer 3250 computer. 
w r i t t e n  t o  a l l o w  easy access t o  mapping, con tour ing  and vec to r  
p l o t t i n g  rou t i nes  w i thou t  p r i o r  knowledge o f  NCAR graphics. 
Software f o r  i n i t i a l i z i n g  t h e  LAMPS mesoscale model has been 
w r i t t e n  and implemented w i t h  op t ions  f o r  r e a l ,  r e a l  non- 
d ivergent  o r  balanced i n i t i a l  winds. The o b j e c t i v e  ana lys i s  has 
been modif ied t o  use LFM o r  Global model data as f i r s t  guess 
f i e l d s  and t o  accept radiosonde o r  s a t e l l i t e  data as processed 
and arch ived on MSFC/ ASD o r  U n i v e r s i t y  o f  Wisconsin format ted 
tapes. 
The LAMPS model code has been implemented on t h e  ASD Perkin-Elmer; 
several s h o r t  t e s t  fo recas ts  have been made f o r  t h e  March 6 1982 
and A p r i l  25, 1975 cases. 
A ve rs ion  o f  t h e  LAMPS map processing graphics module was 
success fu l l y  run  on bo th  the  Perkin-Elmer and IBM 4341. A s imp ler  
program was w r i t t e n  which a l lows f o r  a qu i ck  l ook  a t  model out -  
p u t  f i e l d s  ( a l s o  us ing NCAR graphics ) and f o r  t r a n s f e r  o f  
gr idded data from the  Perkin-Elmer t o  t h e  HP-1000. 
User f r i e n d l y  subrout ines have been 
CURRENT -- FOCUS OF RESEARCH: 
1. 
2. 
3. 
4. 
5. 
Development o f  methods t o  incorpora te  VAS s a t e l l i t e  der ived  
s p e c i f i c  humid i ty  and p r e c i p i t a b l e  water abso lu te  values and/or 
g rad ien t  i n fo rma t ion  i n t o  mesoscale model i n i t i a l  s ta tes .  
Work i s  con t inu ing  on t e s t i n g  o f  t he  bas ic  LAMPS model code, 
and s p e c i f i c a l l y  on i n c l u s i o n  o f  t h e  convect ive parameter izat ion.  
A s i m p l i f i e d  ve rs ion  o f  t h e  LAMPS "wind adjustment'' program has 
been w r i t t e n  and i s  be ing tes ted  f o r  i n c l u s i o n  w i t h  t h e  MSFC 
model i n i t i a l i z a t i o n  package. Work has j u s t  begun t o  s i m i l a r l y  
modi fy  another LAMPS r o u t i n e  t o  generate model t ime  dependent 
l a t e r a l  boundary tendencies. 
Work i s  i n  progress t o  conver t  t he  LAMPS map process ing code on 
t h e  ASD Perkin-Elmer i n t o  an i n t e r a c t i v e  program f o r  more 
f 1 e x i  b l  e v iewing o f  mesoscale model ou tpu t .  
Work i s  underway t o  implement t h e  LAMPS model code on t h e  NASA/ 
GSFC CYBER 205 computer f o r  remote execut ion  o f  l a r g e  produc t ion  
model runs from MSFC. 
175 
https://ntrs.nasa.gov/search.jsp?R=19840026805 2020-03-20T21:30:58+00:00Z
FUTURE RESEARCH: 
The remainder of FY-84 will be spent in support of items listed 
under current research. For FY-85 plans have been made for model 
forecast impact studies us ing  sa te l l i t e  derived moisture. March 6 ,  
April 24 and April 26 cases have been chosen for study because o f  
the availability of VAS measurenients. Verification will emphasize 
mesoscale precipitation forecasts. These studies will provide 
evaluation for the qual i ty  o f  sa te l l i t e  moisture fields, model 
sensitivity t o  mesoscale moisture structure, and will provide 
guide1 ines for future space sensor requirements as  regards the 
observation o f  atmospheric moisture. 
PUBLICATIONS: 
Results from a limited area mesoscale numerical forecast ,  Part I :  
Initialization with SESAME-AVE radiosonde data .  
Monthly Weather Review ) .  
Results from a limited area mesoscale numerical forecast, Part 11: 
Radiosonde versus sate1 1 i te d a t a  initialization. ( In  preparation ) 
Initialization of a mesoscale model f o r  April 10, 1979 using 
alternative da ta  sources. ( Submitted f o r  publication as a NASA 
technical document ) . 
( Submitted t o  
176 


Numerical simulation of mesoscale precipitation

Abstract

Similar works

Full text

Available Versions

NASA Technical Reports Server