The following tribute was taken from an obituary which appeared in the Washington Post on March 8, 2010.
Joanne Malkus Simpson, 86, a world-renowned atmospheric scientist whose accomplishments span a half-century, died March 4 of multiple organ failure at George Washington University Hospital. She was a Washington resident.
Dr. Simpson, the first female meteorologist to earn a doctorate, developed the first scientific model of clouds, discovered what keeps hurricanes whirling forward and revealed what drives the atmospheric currents in the tropics. She later conducted unique "weather modification" experiments and ran an international satellite project that measures tropical rainfall over the oceans, enterprises that continue to have significant impacts in the field. She worked for the past 30 years at NASA Goddard Space Flight Center in Greenbelt, where she was chief scientist for meteorology.
Animated, opinionated and deeply knowledgeable about tropical meteorology, Dr. Simpson first made her mark in the 1950s when she and Herbert Riehl explained how the atmosphere moved heat and moisture away from the tropics to higher latitudes. The "hot tower" hypothesis, supported by her models of cumulus clouds, helped explain how the trade winds keep blowing and how hurricanes retain the heat that powers them.
"There is zero doubt that there has never been a more capable woman in meteorology, and she would also be in the top five of all meteorologists in history, no matter the gender," said Greg Holland, director of the Earth Systems Laboratory at the National Center for Atmospheric Research in Boulder, Colo.
Her most important professional achievement, she often said, came near the end of her long career, when NASA in 1986 asked her to lead the science study for the proposed Tropical Rainfall Measurement Mission. The joint mission with the Japanese space agency has been key in helping scientists learn how hurricanes start in the Atlantic, how dust and smoke can drastically influence rainfall, and how to estimate latent heat released by tropical cloud systems.
Dr. Simpson was also a mentor for two generations of top-level scientists, particularly women. In 1998, she was named one of the Ms. Foundation's top ten female role models.
"Any comparison between the way it was when I started and the way it is now is like comparing the covered wagon with a jet plane," she told the Christian Science Monitor in 1989. "But this doesn't mean that women don't still have obstacles to overcome. . . . Sometimes you have to fight just to keep the opportunities you have."
She was candid about the number of obstacles she had to overcome. Born Joanne Gerould on March 23, 1923, in Boston, she became interested in clouds while learning to sail and later as a student pilot. She studied under Carl-Gustav Rossby at the University of Chicago. After graduating and obtaining a master's degree, she and two other women sought fellowships for doctoral work in meteorology. A faculty adviser said that no woman had ever received a doctorate in meteorology, none ever would. So she began saving for tuition by teaching at the Illinois Institute of Technology, where she met German immigrant Herbert Riehl, who lectured on tropical storm research. Riehl agreed to be her adviser, and she began working on cloud research at the University of Chicago.
At the time, clouds were considered a result, not a cause, of weather, but Dr. Simpson thought them fascinating. Rossby told her no one else was very interested in the topic, so it was a good subject "for a little girl to study."
After she received her doctorate in 1949, she and Riehl wrote several landmark papers about hurricanes and tropical meteorology. In 1951, she became a research meteorologist at the Woods Hole Oceanographic Institute in Massachusetts, where with the help of a slide rule, she constructed some of the first mathematical models of clouds. To validate her work, she needed to fly into the very tall clouds near the equator. The Navy lent Woods Hole an old PBY-6A airplane, which they outfitted with scientific instruments. But Woods Hole's director said women were not allowed on its field trips. The naval officer who arranged the aircraft, however, told the director, "No Joanne, no airplane." She flew.
The next few years took her to England on a Guggenheim fellowship and to the UCLA faculty. She was also named an adviser to the National Hurricane Research Project. In 1963, she flew above the clouds during the NHRP's Project Stormfury and ejected flares that dispersed silver iodide into the clouds. The clouds behaved as she had predicted, so she wrote an article "and a furor broke loose," Dr. Simpson later said. "I was totally unaware of the level of emotion and hostility that was directed against anything that had to do with cloud seeding."
She married the director of the hurricane project, and from 1965 to 1974, she was director of NOAA's Experimental Meteorology Laboratory in Coral Gables, Fla. Although she hadn't lost faith in the scientific possibilities of cloud seeding, Dr. Simpson said in 1999 that the money spent on Stormfury would have been better spent on improving homes and enforcing building codes in hurricane-prone areas.
She moved to the University of Virginia in 1974 but within five years left Charlottesville for NASA Goddard as head of the Severe Storm Branch. She remained there the rest of her career.
"When I first got to NASA, I realized I could talk science in the ladies' room," she said. "This was something new in my career, to find three or four other scientists in the ladies' room."
As recently as two years ago, her scientific work triggered controversy when she wrote an article expressing skepticism about some of the evidence underlying global-warming discussions. While calling for better data and stricter definitions, she also urged the nation to act on the recommendations of the Intergovernmental Panel on Climate Change "because if we do not reduce emissions of greenhouse gases, and the climate models are right, the planet as we know it will, in this century, become unsustainable. But as a scientist, I remain skeptical."
Dr. Simpson, who was the first female president of the American Meteorological Society, received its highest honor, the Carl-Gustav Rossby Research Medal, in 1983. She was a member of the National Academy of Engineering, and in 2002, she was awarded the prestigious International Meteorological Organization Prize. She was the first woman to receive the award.