TURBULENCE CONFERENCE HELD AT NCAR

Vol. 12, No. 25

24 June 1977

0

NATIONAL

CENTER

FOR ATMOSPHERIC RESEARCH

TURBULENCE CONFERENCE HELD AT NCAR

the study of turbulence in both a direct (observation and laboratory or numerical simulation) and a

theoretical way is of major concern to a large number of NCAR scientists. Last week, they were able to get together with their colleagues in the field during a three-day conference on turbulence research organized by Jack Herring of the Advanced Study Program (ASP).

The 65 participants came from 22 universities, four government agencies, and six foreign institutions. "We had a very broad representation," Jack says, "and we were particularly gratified by the attendance of a group of our colleagues from the Observatoire de Nice in France. Uriel Frisch of that group was helpful to us in organizing the conference."

The current status of turbulence theory was summed up by Robert Kraichnan (Dublin, New Hampshire) in the opening talk of the conference. "We have a number of theoretical goals," he said. "We want to achieve a qualitative physical understanding of turbulence, we are working on a mathematical under-standing, and we are attempting to fit our understand-ing into a systematic analytical framework." Progress has been made in all these directions in the past few years, and 18 other speakers discussed that progress over the course of the conference.

The study of turbulence deals with the motion of fluids in which local velocities and pressures fluctuate randomly and irregularly. Turbulent flows and their effects are encountered in nearly every case involving fluid motion--in the motions of the oceans and the atmospheres of the earth, sun, and planets, for example. The equations of motion for a viscous fluid were first derived by two French scientists, Claude-Louis-Marie Navier (1822) and Simdon Poisson (1829), and they were further refined by a British physicist, Sir George Gabriel Stokes, in 1845. Scientists seeking to describe turbulence quantitatively work with these equations, now called the Navier-Stokes equations.

While the equations look simple enough on paper, their simplicity is deceptive, and the real complexity of the fluid flows they describe is difficult to imagine. Fluid flows develop subtle and complex patterns that appear to be completely random, and thus the kinds of mathematics and physics developed to study random processes--statistical approaches--have been applied to the understanding of turbulence.

WitZiam Reynolds oJ Stanford University taUzs with

Steven O'szag oJ the Maz chuzett6 I6titute o6 Technology at tast week's confeAence on turbutence reea'ch. (Photo by Robert Bumpa6.)

One of the interesting recent developments in the field is the use of a new mathematical technique from the discipline of statistical mechanics, called "renormalization group theory." The application of this theory to turbulent flows was discussed in detail at the conference by David Nelson of Harvard University, and it was touched on by many other speakers.

One of the themes at the conference was the relation of the methods developed for the study of random processes to the fact that turbulent flows often contain within them compact and well-ordered structures that may be treated as nonrandom phenomena; speakers noted that new methods for dealing with these embedded structures are needed. The advent of modern computers has enabled theoreticians of turbulence to attack the mathematical problems head on, to confirm or disprove theories or to construct direct numerical simulations of turbulent flows.

"I think many of the speakers were correct in saying that there are no great scientific break-throughs in this field," Jack Herring says. "Rather, it's a field in which steady progress is being made on many fronts."

(continued)

Turbulence Conference Held at NCAR

Announcements

Visitors

Computing Facility Statistics

Visitors

Job Openings

2/Staff Notes/24 June 1977

The speakers in addition to Kraichnan and Nelson were Jerome Weinstock (National Oceanic and

Atmo-spheric Administration), Uriel Frisch (Observatoire de Nice), Steven Orszag (Massachusetts Institute of Technology), William Reynolds (Stanford University),

Stanley Corrsin (The Johns Hopkins University), Carl Gibson (University of California at San Diego), Eric Siggia (University of Pennsylvania), Willem Malkus (Massachusetts Institute of Technology), Francis Bretherton (NCAR), Greg Holloway (University of California at San Diego and ASP), Richard Salmon

(Scripps Institution of Oceanography), David Montgomery (University of Iowa), Marcel Lesieur

(Institut de Micanique, Grenoble, France), Cecil Leith (NCAR), Brian Launder (University of California at Davis), James Deardorff (NCAR), and Stuart Patterson (NCAR).

Arrangements for the conference were coordinated by Betty Wilson and Maria Krenz of ASP, and Betty notes that ASP will publish abstracts of the talks. Questions about the conference may be directed to Jack (ext. 409) or Betty (ext. 401). * MM

COMPUTING FACILTTY OPERATIONAL STATISTICS

CRU Total RJE Tape TLIB TBM TBM its Date Uptime Downtime (X10 ) Jobs Jobs Mounts Requests Requests (X10 )

6/13 20.4 l.P,.6F,2.V 33.3 1181 354 479 958 121 9.2 6/14 19.5 1.P,1.1F,2.4V 27.7 1147 183 423 871 147 7.5 6/15 18.8 1.P,2.4F,1.8V 26.7 1252 488 416 1104 135 6.7 6/16 20.6 1.P,.9F,1.5V 29.6 1283 438 449 1062 133 6.9 6/17 19.6 .8P,1.F,2.6V 27.1 1049 346 447 892 154 7.1 6/18 21.2 .1F, 2.7V 31.5 631 152 388 553 109 7.1 6/19 23.6 .4F 39.5 511 165 240 556 64 5.6

1Downtime is given in hours and is of three types: failure), and V (other downtime, various causes).

FIRST AID

AT NCAR

Ann Gayton seem to feee no pain as Suzanne van Scotter ties a ttiangukaA bandage on heA head. Ann and Suzanne wetre among nine people who completed an eight-hou American Red Cwoss

standad

staff

s0o

bafety/secwAity

Stafg Notes is published weekly by the Publications Office of the National Center for Atmospheric Research, P.O. Box 3000, Boulder, Colorado 80307. Editor: Lynne Mesirow

Writers: Merry Maisel, Lynne Mesirow

Production Assistants: Jan Emery, Janis Romancik Copy deadline is 5:00 p.m. on Tuesday for publica-tion on Friday. Office: Mesa Laboratory room 259. Phone: (303) 494-5151, ext. 644.

ANNOUNCEMENTS

Christian Junge of the Max-Planck Institute for Chemistry in Mainz, Germany, will be celebrating

his sixty-fifth birthday next month, and to recognize

his many contributions to atmospheric chemistry and

international science a symposium will be held in

Mainz 11-14 July. Junge was one of the first

scientists to make extensive studies of atmospheric chemistry and the role of particles (aerosols) in the atmosphere, and he is best known for his de-lineation of the composition of a layer in the lower stratosphere (between 18 and 24 km) containing sulfate particles. The layer is now known as the Junge layer. In addition, Junge has devoted much

effort to fitting air chemistry into a larger

meteorological context, bringing the two disciplines together.

At the meeting in Germany, Paul Crutzen of our

Atmospheric Quality Division will present Junge with

a gift from NCAR. If you wish to make a contribu-tion and sign a card for the gift, please call Paul at ext. 338.

CREF UNIT VALUE

The CREF unit value at the end of May was $37.96, down $0.77 from April 1977.

NEW SOLE SOURCE PURCHASE FORMS

Kenneth Pewitt, our purchasing officer, reports that revised "sole source" forms have been printed and distributed to the staff members who deal with

purchase requisitions. Staff members are required

to fill out sole source justifications if they wish

to make a purchase of more than $500 without going through the usual procedure of obtaining bids from three suppliers. The new forms, Ken explains, give more explicit directions for justifying the use of a sole source. If you need a revised form and did not receive one, or if you have any questions, please call Ken at ext. 77-728.

STAFF, VISITORS INVITED TO UCAR RECEPTION The first of the UCAR summer receptions for NCAR visitors and staff will be held on Wednesday, 29 June, beginning at 4:00 p.m. in the Mesa

Laboratory cafeteria. All visitors, participants

in summer student programs, and staff members are welcome. The other UCAR receptions will be on 25 July and 17 August.

SAFETY SHOE VAN TO VISIT MESA LAB

The safety shoe van will be at the Mesa Labora-tory's shipping and receiving area on Monday, 27 June, from 12:00 noon to 1:30 p.m. In order to obtain a pair of shoes, you will need a purchase requisition approved by your supervisor.

PROMOTION

Mary Trembour: from mag tape librarian to mass storage librarian with the Computing Facility. ML room 288, ext. 367.

NEW STAFF MEMBERS

Cynthia DelPizzo: Computer operator aide with the Computing Facility. ML room 29, ext. 536. Rebecca Espinosa: Computer operator aide with the Computing Facility. ML room 29, ext. 536. Michael Hester: Computer operator aide with the

Computing Facility. ML room 29, ext. 536. Keith LaGrenade: Data analyst with the National Hail Research Experiment. ML room 567, ext. 220. Donald Nelson: Driver with the Advanced Study

Program. ML room 513, ext. 401.

Arlene Olech: Clerk typist with the Finance Office.

PSRB-3 room 320, ext. 77-723.

Anita Vejil-Martinez: Employment assistant with the Personnel Office. ML room 150, ext. 555.

VISITORS

Wedad Abdou, Utah State University. Field of

interest: Twilight variations of photochemically active stratospheric species. 20-24 June. Computing carrels, dial "0" for paging service.

--Computing Facility

Bruce Abell, National Science Foundation, Washington, D.C. Field of interest: Photographs of NCAR

research for an NSF picture project. 8 July.

--Henry Lansford, Information Office

Chris Curtis, Utah State University. Field of

interest: Infrared radiance model for aurorically disturbed atmosphere. 15-30 June. Computing carrels, dial "0" for paging service.

4/Staff Notes/24 June 1977

John Freeman, Institute for Storm Research, Houston,

Texas. Field of interest: Meteorology. 9-10 June.

ML room 202D, ext. 238. --Herbert Riehl, GATE

Donald Gilman, NOAA/National Weather Service,

Washington, D.C. Field of interest: Climate

prediction. 6-9 June.

Robert Dickinson, Climate Project

Ramesh Godbole, Florida State University. Field of interest: Monsoon circulation. 21-25 June. Computing carrel 11, dial "0" for paging service. --Computing Facility

William Grose, NASA/Langley Research Center, Hampton, Virginia. Field of interest: Dynamic meteorology. 6-10 June. ML room 411C, ext. 677.

--V. Ramanathan, Climate Project

Ronney Harris, Utah State University. Field of

interest: Infrared radiance model for aurorically disturbed atmosphere. 15-30 June. Computing carrels, dial "0" for paging service.

-- Computing Facility

Paul Herzegh, University of Washington. Field of interest: Aircraft and radar studies of precipitation systems. 19-24 June. Computing carrels, dial "0" for paging service.

--Computing Facility

David Houghton, University of Wisconsin. Field of interest: Meteorology. 7-9 June.

-- Robert Dickinson, Climate Project

Kabind Kante, National Institute of Scientific

Research and Documentation, Guinea, West Africa. Field of interest: Scientific journals and publica-tions. 27 June. ML room 135, ext. 261.

--Henry Lansford, Information Office

T. N. Krishnamurti, Florida State University.

Field of interest: Tropical dynamics. 21-25 June.

Computing carrel 10, dial "0" for paging service. -- Computing Facility

A. K. Macpherson, Lehigh University, Bethlehem, Pennsylvania. Field of interest: Splines in

numerical weather forecasting. 19-30 June.

Computing carrels, dial "0" for paging service. -- Computing Facility

Jerry Mahlman, NOAA/Geophysical Fluid Dynamics Lab, Princeton, New Jersey. Field of interest: Atmospheric science. 7-9 June.

-- Robert Dickinson, Climate Project

Bette Otto-Bliesner, University of Wisconsin. Field

of interest: GCM second-generation documentation. 22-24 June. ML room 402A, ext. 670.

--Warren Washington, GCM Coordination and Operations Group

Jill Williams, International Institute for Applied

Systems Analysis, Laxenburg, Austria. Field of

interest: Climate. 6-26 June. ML room 428, ext. 412.

-- Harry van Loon, Empirical Studies Project

The following visitors participated this week in the ESIG/ASP workshop entitled MutLtd cip1lncZy Reatch Re&ated to the Atmosphet

L

J. A. S. Adams, Rice University.

Richard Barber, Duke University Marine Laboratories. Don Borock, Gettysburg College, Pennsylvania. T. Crocker, University of Wyoming.

Ray Davis, University of Arizona.

John Dracup, University of California at Los Angeles. Barbara Farhar, Human Ecology Research Service, Boulder.

Norman Furness, Gettysburg College, Pennsylvania. Larry Goldberg, Institute of Behavioral Sciences,

University of Colorado.

Eville Gorham, University of Minnesota.

Robert Horst Jr., Los Alamos Scientific Laboratory, New Mexico.

Joan Jordan, National Science Foundation. Lauriston King, National Science Foundation. Jerrold Krenz, University of Colorado. David Lincoln, Carnegie Mellon University, Pennsylvania.

L. L. Lundell, Atlantic Richfield Company, Dallas, Texas.

Royden Nakamura, Southeastern Massachusetts University.

Lawrence Phillips, Decisions and Designs, Incorporated, McLean, Virginia.

Robert Phillips, Sacramento State University. Kanti Raiwal, University of Colorado.

Bruce Rettig, Oregon State University. Clarence Sakamoto, Center for Climatic and

Environmental Assessment, NOAA, Columbia, Missouri. Bill Schulze, University of New Mexico.

Stanley States, University of Pittsburgh. J. Dana Thompson, JAYCOR, Alexandria, Virginia.

Frank von Hipple, Princeton University.

Thomas Waltz, NOAA, Rockville, Maryland.

Jill Williams, International Institute for Applied Systems Analysis, Austria.

LONG-TERM

David Barber, Oregon State University. Field of

interest: Synoptic meteorology. 20

June-19 August. ML room 520G, ext. 424 (During July:

ML room 520A, ext. 406).

-- Maurice Blackmon, Advanced Study Program

Lee Branscome, Massachusetts Institute of Technology. Field of interest: Numerical weather prediction. 13 June-20 August. Library carrel 1, ext. 402. --Maurice Blackmon, Advanced Study Program Odus Burggraf, Ohio State University. Field of interest: Boundary layer and ocean circulation. 20 June-19 August. ML room 320C, ext. 477. --Maurice Blackmon, Advanced Study Program

Robert Calahan, Western Kentucky University. Field of interest: Solar system physics. 20 June-19 August. ML room 515, ext. 413.

--Maurice Blackmon, Advanced Study Program

Steve Daly, University of Chicago. Field of interest: Effects of poorly conducting boundaries on thermo-convective dynamics. 16 June-31 August. Computing carrel 14, dial "0" for paging service.

--Computing Facility

Scott Fulton, Kalamazoo College, Michigan. Field of interest: Atmospheric sciences. 15

June-15 August. Library carrel 1, ext. 402. --Maurice Blackmon, Advanced Study Program Tzvi Gal-Chen, University of Toronto. Field of

interest: Numerical modeling. 15 June-15 September. ML room 300A, ext. 491.

--James Deardorff, Small-Scale Analysis and Prediction Project

Robert Lee, Iowa State University. Field of interest: Meteorology. 16 June-15 September. ML room 51, ext. 389.

--James Coakley, Climate Project

Edward Lorenz, Massachusetts Institute of Technology. Field of interest: Dynamical and statistical

meteorology. 15 June-14 August. ML room 512, ext. 400.

--Maurice Blackmon, Advanced Study Program Timothy Miller, University of Arizona. Field of interest: Numerical modeling. 1 June-15 August. ML room 466, ext. 227.

--G. Brant Foote, National Hail Research Experiment Carol Jean Selvey, University of California at San Diego. Field of interest: Atmospheric sciences. 20 June-21 August. Library carrel 17, ext. 402. --Maurice Blackmon, Advanced Study Program

Charlie Smith, Jackson State University, Mississippi. Field of interest: Science education. 20

June-19 August. ML room 520G, ext. 424. --Maurice Blackmon, Advanced Study Program Bryan Weare, University of California at Davis.

Field of interest: Empirical orthogonal analysis of global free air temperature. 20 June-20 July. Computing carrels, dial "0" for paging service.

--Computing Facility

*

CAUTION: DEER ABOUT TO CROSS

Thiz fawn was wetU camouflaged by the vegetation on the WattAt 0,1 Robert6 Mesa until it datted out onto the NCAR

toad.

fawns are alszo haAd to See because they ate

so small,

less

deeA that gtaze on the Mesa may cAo4 the

road

and at any

sea.on

beauti-fut natuwt setting of the Mes.6a, they can also pose a dangeA to motoArst6 and cyctists. The s6taff and v-iLtors to NCAR ate teminded to drive

stowly

.

look

as of 22 June 1977

NCAR is an equal opportunity/affirmative action employer. Women and minority applicants are encouraged to identify themselves.

A copy of our Affirmative Action Plan is available for review

Staff members and those on lay-off who wish to be considered for a position should contact the Employment Coordinator within two weeks after the job is first posted. If qualified, these persons will be given first consideration; if possible, the position will be filled from this group. After the two-week period, if no current or laid-off employee is selected to fill the position persons from outside NCAR will be considered. For more information, please contact the Personnel Office (ext. 555 or 569).

REGULAR (Full-time)

ADMINISTRATIVE SECRETARY: To provide secretarial support for the staff and visitors of the Advanced Study Program. (ASP averages more than 100 short-and long-term visitors per year.) Responsibilities include: typing correspondence and, at times, initi-ating correspondence; typing scientific papers, including symbols and equations; handling travel arrangements, authorizations and vouchers; com-pleting visitor authorization and information forms; maintaining division files; gathering information for and typing the "Papers Submitted" section of the

Quarterly Management Report and ASP publications

list for the Annual Report; maintaining mailing list

for ASP educational programs and assisting with

mailings; and assisting the Administrator in other

areas when needed. Requirements include: at least 4 years of progressive secretarial experience; usual office skills; thorough knowledge of English, spell-ing, grammar and composition; ability to establish and maintain good working relations with all types of people; ability to exercise initiative and judg-ment with regard to scheduling work priorities and

to make decisions in accordance with NCAR policies and procedures. Preferences include: technical/ scientific typing experience and/or secretarial business school. Secretarial/business education may be substituted for 1 or 2 years of experience. Non-exempt range 19. Anticipated hire-in salary: $805-925/month. This position may be filled after 5 July 1977.

ARCHITECTURAL PLANNER (ENGINEER II): For the Plan-ning and Design Department to prepare documents and reports related to planning/construction of new and remodeled facilities, including preparation of de-sign sketches, working drawings, specifications, cost estimates, construction inspection and other duties normally associated with production in the general practice of architecture. Requirements include: B.S. in architecture or architectural engineering; 4 years of experience under the

super-vision of a registered architect; and demonstrated capability in the following areas: space planning working drawings, specifications and cost estimat-ing. Also desirable are a background in remodel-ing of existing structures and an architect regis-tration by examination. Samples of applicant's work may be requested at the time of the interview. Exempt range 56. Anticipated hire-in salary: 13,900-17,400/year. This position may be filled by an in-house applicant after 28 June 1977 or after 12 July 1977 by an outside applicant.

DATA ENGINEER: For the DataiManagement Group of the Research Aviation Facility (RAF) to be responsible for the modification, development, and maintenance of all mini and microcomputer software for data acquisition systems and processing modules carried aboard NCAR aircraft. Will be responsible for the development of CRAY-l/CDC 7600 off-line programming capabilities for the types of mini and microcomputer systems used by the RAF (DGC, DEC, Rolm, Zilog, and

Intel); will assist in the interfacing of various equipment to the onboard systems by providing the necessary software elements; will formulate design specifications for new or revised onboard software operating systems; will be responsible for aiding in the evaluation of RAF data products through the use of various time-series analysis techniques including both temporal and frequency domain meth-o-d-s; will aid in developing stochastic, dynamic models of airborne sensors and sensing systems, and in devel-oping optimized, predictive filtering modules for both on- and off-line signal processing applications. Travel may, upon occasion, require absence from the Denver/Boulder area for a substantial period of time. Such travel may be to foreign countries and may involve living conditions below United States stan-dards. May occasionally require flying in an un-pressurized aircraft above 14,000 feet or a pressur-ized aircraft (which requires high-altitude physi-ological training). Requirements include: M.S. in

grammer/analyst; 2 years experience as an applica-tions programmer; background in writing business applications systems primarily in a high-level lan-guage; working knowledge of data base management systems; and a working knowledge of improved pro-gramming productivity techniques including struc-tured design, strucstruc-tured coding, and the programing team concept. Exempt range 54. Anticipated hire-in salary: $11,400-14,300/year. This position may be filled after 28 June 1977. Internal and external applicants will be considered simultaneously.

PROGRAMMER/ANALYST I: For the Administrative Com-puting Department to be responsible for developing detailed programing plans and instructions required for the implementation of new computer based systems and the modification and maintenance of existing systems. Will assist with portions of the activities required for the analysis, design and implementation of Administrative Computer Systems. The work will utilize improved productivity techniques including structured design, structured coding and team approach. Requirements include: B.S. in computer science or

electrical or control systems engineering; profi-ciency in FORTRAN programming for both small and large scale computing systems; 1 year of experience in assembly language programming of minicomputers utilizing interrupt drivers or equivalent academic coursework; familiarity with the analysis of dynamic systems and conversant with state variable approaches to system analysis and modeling; a working knowledge of the derivation and application of digital filter-ing techniques; and ability to maintain effective working relationships with others in a tasked, team environment. Prefer experience with real-time oper-ating systems being used for physical data acquisition and display and at least 1 year of applicable, non-academic work experience. Exempt range 56. Antici-pated hire-in salary: $14,300-17,900/year. This position may be filled after 7 June 1977 by an in-house applicant or after 21 June 1977 by an outside applicant.

REGULAR (Part-time)

ADMINISTRATIVE SECRETARY (half-time): For the Finance Office to type all handwritten statistical reports on a regular monthly or quarterly basis. Will also type other reports, memos, correspondence

in Finance Department. Is responsible for the dis-tribution of mail to all personnel in the Finance section. Will file all memos, correspondence and other material generated in this and other depart-ments. Is responsible for keeping an efficient filing system. Answers telephones, takes messages,

issues petty cash vouchers, prepares cash receipt entries, makes credit card issuances and

cancella-tions, makes bank deposits. Invoices all charges

in receivable accounts which requires checking pur-chase orders on Palestine related charges; reviews General Ledger for all the above, performs other work in the Finance Office that may be assigned from

time to time. Requirements include" a high school

diploma or equivalent; minimum of 3 years of

secre-__

tarial experience; and typing at 60 WPM.

Experience

accounting department experience is also desirable. This position is shared with another half-time

secre-tary; each will be expected to work full-time every other week. Non-exempt range 19. Anticipated

hire-in salary: $402.50-472.50/month. _{This position may} be filled after 28 June 1977.

CUSTODIAN (half-time): For the Plant Maintenance Department to _{dust, wash walls, wash and polish} furniture, dump trash, wash ash trays and trash

receptacles, and clean, wax and buff floors.

Appli-cants must have the physical endurance to lift 5

gallon buckets and must be able to operate 1,00

pound floor cleaning machine and 20 inch buffing machine. Applicants must be available to work 4 hours between 2:00 p.m. and 7:30 p.m. Hire-in salary: $317.50/month. _{This position may be filled}

after 5 July 1977.

SPECIAL PROJECT (Full-time)

Ph.D. SCIENTIST: For the Nimbus 6 and Nimbus G Infra-red Limb Scanning projects in the Upper Atmosphere Project. Will provide scientific support to the development of the Limb Infrared Monitor of the Strato-sphere (LIMS) experiment for the Nimbus G research satellite and aid ih the interpretation of results from the Nimbus 6 Limb Radiance Inversion Radiometer

(LRIR). Duties will include developing techniques to determine the effects of instrument parameters upon derived atmospheric variables, calculating atmospheric transmittances with line-by-line methods, improving radiative transfer models, developing, improving and testing inversion algorithms, improving and comparing objective analysis schemes, developing programs to compare satellite with in-situ data, and developing and using programs for data application. Require-ments include: a Ph.D. in atmospheric science or physics, 1 year experience in modeling infrared radiative transfer, facility in FORTRAN programming, a working knowledge of remote sensing and inversion theory. Also required is an ability-to work in a cohesive group, and provide direction of a programmer.

In addition, experience in interpreting satellite measurements of infrared emission and some knowledge of infrared instrumentation is desiroble.. Experience may be substituted for education if relevant to the position and is of sufficient nature and duration to have elevated the applicant to a level of sophisti-cation equal to the Ph.D. in the area of radiative transfer. Initial appointment will be made for 1 year, with possibility of extension through September 1980. Exempt range 58. Anticipated hire-in salary: $16,800-21,O00/year. This position may be filled

by an in-house applicant after 31 May 1977 or by an

outside applicant after 14 June 1977.

Duties will include interpreting instrument para-meters in terms of their effect upon derived

atmos-pheric variables, interpreting instrument calibra-tion data, development of programs to calculate atmospheric transmittances and outgoing limb radi-ances and the development of and test of algorithms to invert radiometric limb data. Minimum require-ments include completion of all course requirements for M.S. in atmospheric sciences, physics or

engi-neering, a working knowledge of remote sensing tech-niques and inversion theory and knowledge of FORTRAN programming. In addition, 1 year experience in either modeling infrared radiative transfer or in interpreting satellite measurements of infrared emission is required; however, comprehensive grad-uate courses in these areas may be substituted for experience. Some knowledge of infrared instrumen-tation is desirable. This position is expected to last through September of 1979 and probably through September of 1980. Exempt range 56. Anticipated hire-in salary: $14,300-17,900/year. This position may be filled at any time.

TECHNICIAN II: For the FGGE Dropwindsondes Project to test complete dropwindsondes for speci-perfor-mance, both mechanical and electrical. Will dis-assemble dropwindsondes and test performance of modules as well as inspect the dropwindsonde for conformance to workmanship and other standards. This person will carry out assignments under general

supervision. Requirements include: familiarity with the means of recording data; knowledge of both digital and analog circuits, the components going

into such circuits, construction methods and the

instrumentation needed to test the performance; 4

years of electronic technician experience; and 1 year of electronic trade/technical education. Familiarity with temperature and humidity instru-mentation is desired. Additional related education may substitute for some of the experience require-ment; also, additional experience may substitute for the education requirement. This position is expected to last through June of 1978. Non-exempt ranges 19-20. Anticipated hire-in salary: $780-990/month. This position may be filled after 5 July 1977.

CASUAL (On-call-as-needed)

CLERICAL ASSISTANT: For the Research Aviation

Facil-ity (Broomfield) to type correspondence and other

types of documents,

process incoming and outgoing

mail, answer

telephones

and other general office

duties on an on-call-as-needed basis. Requirements

include: high

school

diploma or equivalent; 2 years

general office

experience

or equivalent level of

know-ledge gained through related business coursework; and

ability to type a

minimum of 60 WPM accurately.

Short-hand capabilities

highly !desirable.

Prefer someone

from Broomfield or

close proximity to JEFFCO.

Hire-in

salary: $3.84/hour.

This position may be filled

after 14 June 1977.

CUSTODIAN: For the Plant Maintenance Department to

dust, wash walls, wash and polish furniture, dump

trash, wash ash trays and trash receptacles,

and

clean, wax and buff floors. Applicants must have the

physical endurance to lift 5 gallon buckets and must

be able to operate 1,000 pound floor cleaning machine

and 20 inch buffing machine. Applicants must be

available to work on-call-as-needed for either

6:00-10:00 PM or 6:00-2:00 AM. Need for availability will

be the greatest during the summer. Hire-in salary:

$3.64/hour. This position may be filled after 28

June 1977.

MONDAY, June 27

* Noon Movie -- Emergency Driving Tactics

12:15 p.m.

NCAR Mesa Laboratory, Main Seminar Room * ATD/Computing Facility Seminar -- How to Submit

Jobs to the Cray-i Computer, Gene Schumacher, ATD

3:00 p.m.

NCAR Mesa Laboratory, Main Seminar Room TUESDAY, June 28

* ATD/Computing Facility -- On Construction and Testing of Finite Difference Codes, John Gary, NCAR/University of Colorado

3:00 p.m.

NCAR Mesa Laboratory, Main Seminar Room

WEDNESDAY, June 29

* AQM Seminar -- Title and speaker to be announced

O1:30

Fleischmann Building

Walter Orr Roberts Seminar Room

* Climate Club -- Vertical Scale of Unstable Baroclinic Waves and Its Importance for Eddy Heat Fluxes, Isaac Held, Harvard University

3:00 p.m.

NCAR Mesa Laboratory, Main Seminar Room

* Reception for Visitors and Staff -- Refreshments

All visitors, student program participants, and NCAR staff welcome.

4:00 p.m.

NCAR Mesa Laboratory, Cafeteria

THURSDAY, June 30 Open FRIDAY, July 1 Open MONDAY, July 4 Holiday