A Comparison of the Utility of 1st and 2nd-order Regularization Matrices for Controlling Non-Linear

Effects in Optimally-Estimation Retrievals of Carbon Monoxide from Nadir Satellite

Measurements

James R. DrummondDalhousie University

How Did I Get Here?Looking Back on a Career in Atmospheric Science

(Now over 40 years and counting...)

James R. DrummondDalhousie University

A cynic is someone who knows the price of everything and the value of nothing (Oscar Wilde)

In any personal interaction you have a choice: You can invite the other person to live, or you can invite them to die. The choice is yours. (Glenn Taylor)

There is something fascinating about science. One gets such wholesale returns of conjecture out of such a trifling investment of fact. (Mark Twain)

[Thinking is] what a great many people think they are doing when they are merely rearranging their prejudices. (William James)

Three Persistent Items My Science

– Doing something new– Making things happen

My Faith– Doing something useful– Being comfortable in my skin and with my ethics

My Wife– Because life happens....

The Early Years

Gordon Dobson 1889-1976

Alan Brewer 1915-2007

Sir John Houghton 1931-

James Drummond 1950-

1970

1972

1970

1975

1978Nimbi (Nimbuses?)

Harold S JohnstonOne of Johnston's most significant research efforts has been on the destruction of the

ozone layer. This layer in the earth's upper atmosphere protects people from the Sun's ultra-violet rays. Chlorofluorocarbons (CFCs)—gaseous compounds often used in aerosol cans, refrigerants, and air conditioning systems—deplete this ozone layer, resulting in increased amounts of harmful radiation reaching the earth's surface. The Environmental Protection Agency has imposed production cutbacks on these harmful chemicals. Much like CFCs, nitrogen oxides also damage the ozone layer. During the late 1960s, the federal government financed the design and construction of two prototype supersonic transport (SST) aircraft. An intense political debate over whether the program should be expanded to construct five hundred SSTs was waged. Although Congress was split almost evenly, both houses voted to terminate the SST program in March, 1971. Johnston's articles and testimony suggesting the negative effects SSTs could produce on the atmosphere led two senators to introduce the Stratosphere Protection Act of 1971, which established a research program concerned with the stratosphere. The resulting 1971 program, with which Johnston was affiliated, was called the Climatic Impact Assessment Program (CIAP). Among other things, CIAP concluded that nitrogen oxides from stratospheric aircraft would further reduce ozone. CIAP recommended that aircraft engines be redesigned to reduced nitrogen oxide emissions.

Why I Can't Hate the Concorde

It paid for my D.Phil. Research!!

Ballooning - French-Style

1970

1972

1970

1975

1978Nimbi (Nimbuses?)

1974 Jim DrummondHoward Roscoe

John Barnett Dan McCleese

John Houghton

Mike Coffey

Clive Rodgers

And So On....

The Lowest Point

When you read in the morning paper that your program has been canceled

1986 – A Sabbatical with No Return

Lecture by Richard Hamming (1915-1998) (Hamming codes and Hamming windows)

“How to be a Famous Scientist”• Never eat lunch with your colleagues• Only work on the big problems• Reserve Friday afternoons for thinking deep

thoughts

He was a professor at the University of Louisville during World War II, and left to work on the Manhattan Project in 1945, programming one of the earliest electronic digital computers to calculate the solution to equations provided by the project's physicists. The objective of the program was to discover if the detonation of an atomic bomb would ignite the atmosphere.

The Lowest Point

When you read in the morning paper that your program has been canceled

And then along came......

MOPITT 1986 – 20??

OSIRIS/Odin - 2001

Scisat 2003MOPITT/Terra 1999

MOST 2003

The Golden Age?

September 16, 2010 CASI Meeting 20

Instant Major CO facts…• Mixing ratio about 60-200ppbv

– Higher in major pollution zones• Produced by incomplete combustion

– Forest fires, grass fires– Industrial activity

• Removed by OH• Measuring CO gives us a “window” into the tropospheric chemistry

and transport

27 July 2010 IGARSS - Hawaii

Rush Limbaugh

27 July 2010 IGARSS - Hawaii

Shot At by the Air Force!

Our PEARL Near the Pole: Our PEARL Near the Pole: Atmospheric Research at 80NAtmospheric Research at 80N

James R Drummond,Dept. of Physics and Atmospheric Science, Dalhousie University

and the PEARL Science Team

MATMOS Group Presentation 9 April 2010

MATMOS Group Presentation 9 April 2010

MATMOS Group Presentation 9 April 2010

And so it begins….. (Kosh, Babylon 5)

MATMOSMars Atmospheric Trace Molecule Occultation Spectrometer

ExoMars 2016Trace Gas Orbiter

The Canadian Advanced Polar Science Network(CAPSNet)

A Proposal to Canada's Networks of Centres of Excellence Program

James R DrummondDepartment of Physics and Atmospheric Science

Dalhousie University

CAPSNet