Significant accomplishments (papers published, conference presentations, and education degrees) are presented. The focus of the current research is outlined. Plans for the coming year are discussed briefly

Huang, Huo-Jin

Hurrell, James W.

Kann, Deirdre M.

Pedigo, Catherine B.

Robertson, Franklin R.

Vincent, Dayton G.

English

NASA Technical Reports Server

N90- 12065
Annual Report for NASA GSAPRP*
(l July 1987 - 30 June 1988)
Dynamics and Energetics of the South Pacific
Convergence Zone During FGGE SOP-I
Contract NAS8-35187 (I July - 31 December 1987)
and
South Pacific Convergence Zone and Global-Scale Circulations
Contract NAS8-37127 (20 July 1987 - 30 June 1988)
Principal Investigator: Dr. Dayton G. Vincent
Department of Earth and Atmospheric Sciences
Purdue University
West Lafayette, IN 47907
(317) 494-3290
Collaborative Scientists: Dr. Franklin R. Robertson
Systems Dynamics Lab
NASA/MSFC/ED42
Huntsville, AL 35812
(205) 5441-1655
Dr. Huo-Jin Huang
Atmospheric Sciences Program
University of North Carolina at Asheville
Asheville, NC 28804
(704) 258-6441
Dr. Deirdre M. Kann
National Meteorological Center
WWB, Room 204, W/NMC22
5200 Auth Road
Camp Springs, MD 20748
(301) 763-8161
Graduate students: Mr. James W. Hurrell
Ms. Catherine B. Pedigo
Department of Earth and Atmospheric Sciences
Purdue University
West Lafayette, IN 47907
(317) 494-0653
* report prepared for GSAPRP Review
in Huntsville, AL, August 2-3, 1988
23 RRF.-CED{NG PAGE BLANK _,;OT FILMED
https://ntrs.nasa.gov/search.jsp?R=19900002749 2020-03-20T00:46:38+00:00Z
Significant Accomplishments in Past Year
I , Two articles by Huang and Vincent were published: one in Tellus and the
other in Beitra_e zur Physiks der Atmosphare (see attached pub-ublT-cation
list).
, An article by Hurrell and Vincent was published in the Monthly Weather
Review (see attached publication list).
. Three papers were given at the Third Conference on Satellite Meteorology
and Oceanography in Anaheim, CA, February 1988 (see attached publication
list).
. One manuscript was revised and resubmitted to the Quarterly Journal of
the Royal Meteorological Society, by Robertson, Vincent and Kann, "The
role of diabatic heating in maintaining the upper-tropospheric baroclinic
zone in the South Pacific"
. Dr. Huang spent the summer of 1987 and is spending the summer of 1988 as
a visiting scientist, USRA, at MSFC/NASA, Huntsville, conducting research
on water vapor and precipitation estimates from satellite measurements.
, Dr. Robertson, Dr. Vincent, and Mr. Hurrell visited the GSFC/NASA in
Greenbelt, MD and the National Meteorological Center and Climate Analysis
Center in Camp Springs, MD on 17-19 November 1987. They discussed some
of the research objectives of the contract with Drs. Baker and Lau at
GSFC, Drs. Kalnay and Kann at NMC, and Dr. Mo at CAC.
. A computer account at NSESCC/GSFC/NASA was established so that Dr.
Vincent and Mr. Hurrell could use the Goddard Laboratory for Atmospheres
(GLA) General Circulation Model (GCM) on the CYBER 205 to perform some of
the research objectives of the contract.
. Mr. Hurrell successfully passed his Ph.D. preliminary examination and is
now working full time, as a Ph.D. candidate, on his doctoral research.
Mr. Hurrell's work involves using the GLA GCM to examine the global-scale
physical processes responsible for maintaining the South Pacific
Convergence Zone (SPCZ). With the assistance of Mr. Larry Takacs at
GSFC, Greenbelt, MD, a successful control forecast was produced on the
CYBER-205 using the GLA general circulation model. This forecast was a
15-day average of selected variables, initialized at lO January 1979,
which we are comparing with FGGE observations for the same time period.
The observed state was well simulated by the model and we plan to examine
cause/effect relationships in the future, particularly as they relate to
the SPCZ, which was very intense during the 15-day period.
, Ms. Pedigo gave a departmental seminar on her M.S. research on II April.
The title of her seminar was, "Moisture and Precipitation Analyses During
the Global Weather Experiment (GWE)". Her research is progressing well
and she should finish her M.S. thesis in the Fall 1988 semester.
lO. Dr. Vincent, Mr. Hurrell and Ms. Pedigo visited Dr. Robertson at MSFC,
Huntsville, 6-11 March 1988, to discuss our research work.
24
II.
12.
13.
Three graduate students have accepted offers to come to Purdue in the
Fall 1988 and work on research problems within our contract. Dr. Vincent
will serve as their major professor.
Dr. Peter Speth of the University of Cologne, FRG visited Dr. Vincent on
8 April tQ discuss collaborative research, as well as Dr. Vincent's plans
for sabbatical leave next year in Germany.
Dr. Robertson visited Dr. Vincent, Mr. Hurrell and Ms. Pedigo at Purdue
University on 15-18 June 1988 to discuss their collaborative research.
Focus on Current Research
l , Computer scientists at GSFC/NASA, Greenbelt, MD, have now produced a
second control run on the GLA GCM for Mr. Hurrell to diagnose. This
forecast is averaged over the 15-day period, 28 January - II February,
1979, initialized on 28 January. During this period the SPCZ was
considerably less active, convectively, than during the prior 15-day
control run period (10-24 January). Both runs appear to be successful in
that the forecast fields are in good agreement with the observed fields,
except over the Indian Ocean during the second period. Mr. Hurrell is
now in the process of reading the history tapes provided by GSFC so that
further analyses can be achieved and comparisons can be made between the
active and inactive SPCZ periods.
. Ms. Pedigo is diagnosing the heat and moisture budgets over the tropical
oceans during January and February, 1979, which was part of the period of
The Global Weather Experiment, FGGE. She is using FGGE Level lll-b
analyses produced by GLA and will compare her results to those obtained
using satellite techniques. She currently is producing daily global
results of precipitation using the QI (heat) and Qp (moisture) budget
techniques. A preliminary assessment of the results looks very promising.
. One abstract was recently accepted for presentation of a paper at the 7th
Extratropical Cyclone Workshop to be held in October 1988 at Drexel
University, PA.
. One new graduate student, Captain Keith North, arrived in June 1988 to
begin in M.S. degree work and research on our project.
Plans for Next Year
l ° We have one manuscript in the review process which may require further
work before it is acceptable.
° Mr. Hurrell and Ms. Pedigo will continue to work on their Ph.D. and M.S.
research; Ms. Pedigo should finish her M.S. thesis and receive her degree
in the Fall 1988 semester. A manuscript on her research will be
submitted for publication.
25
..
.
Mr. Hurrell's work should progress toward culmination within the coming
year and, if he completes his dissertation, one or more papers on his
research would be submitted for publication.
Our department moved to a new building in June 1988 which required a
careful review and scrutiny of all research materials. The research
space in the new building offers an improvement over our previous
facility.
We are eagerly anticipating the arrival of two more new students, Messrs.
Ko (M.S.) and Ramsey (Ph.D.). They will begin graduate work in August
1988 and their addition will bring the number of graduate students
working on the project to five.
List of Publications (at Purdue only)
Huang, H.-J. and D.G. Vincent, 1988: Daily spectral energy conversions of the
global circulation during I0-27 January 1979. Tellus, 40A, 37-49.
Huang, H.-J. and D.G. Vincent, 1988: Active and inactive phases of the South
Pacific convergence zone and changes in global circulation patterns: A
case study. Beit. z. Phys. d. Atmos., 61, 123-134.
Hurrell, J.W. and D.G. Vincent, 1987: Significance of the SPCZ in the energy
budget of the Southern Hemisphere tropics. Mort. Wea. Rev., ll5, 1797-
1801.
Huang, H.J., D.G. Vincent and F.R. Robertson, 1988: Precipitable water
derived from NIMBUS-7 SMMR measurements and its comparison to FGGE III-b
data during January lO-February 13, 1979. Preprints of Third Conference
on Satellite Meteorology and Oceanography, January 31 - February 5, 1988,
Anaheim, CA, American Meteorological Society, Boston, MA, 02108, 64-69.
Miller, D.K. and D.G. Vincent, ]988: An example of estimates of precipitable
water derived from NIMBUS-7 SMMR satellite measurements and FGGE upper
air data. Preprints of Third Conference on Satellite Meteorology and
Oceanography, January 31 - February 5, 1988, Anaheim, CA, American
Meteorological Society, Boston, MA, 70-73.
Robertson, F.R. and D.G. Vincent, 1988: Vertical profiles of heating derived
from IR-based precipitation estimates during FGGE SOP-I. Preprints of
Third Conference on Satellite Meteorology and Oceanography, January 31 -
February 5, 1988, Anaheim, CA, American Meteorological Society, 02108,
4 pp.
26


Dynamics and energetics of the South Pacific Convergence Zone during FGGE SOP-1 and South Pacific Convergence Zone and global-scale

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