James Lovelock
James Ephraim Lovelock was an English independent scientist, environmentalist and futurist. He is best known for proposing the Gaia hypothesis, which postulates that the Earth functions as a self-regulating system.
With a PhD in the chemistry of disinfection, Lovelock began his career performing cryopreservation experiments on rodents, including successfully thawing and reviving frozen specimens. His methods were influential in the theories of cryonics. He invented the electron capture detector and, using it, became the first to detect the widespread presence of chlorofluorocarbons in the atmosphere. While designing scientific instruments for NASA, he developed the Gaia hypothesis.
In the 2000s, he proposed a method of climate engineering to restore carbon dioxide–consuming algae. He was an outspoken member of Environmentalists for Nuclear Energy, asserting that fossil fuel interests have been behind opposition to nuclear energy, citing the effects of carbon dioxide as being harmful to the environment and warning of global warming due to the greenhouse effect. He wrote several environmental science books based upon the Gaia hypothesis from the late 1970s.
He also worked for MI5, the British security service, for decades. Bryan Appleyard, writing in The Sunday Times, described him as "basically Q in the James Bond films".
Early life and education
James Lovelock was born in Letchworth Garden City to Tom Arthur Lovelock and his second wife Nellie. Nell, his mother, was born in Bermondsey and won a scholarship to a grammar school but was unable to take it up, and started work at thirteen in a pickle factory. She was described by Lovelock as a socialist and suffragist, who was also anti-vaccine, and did not allow Lovelock to receive his smallpox inoculation as a child. His father, Tom, was born in Fawley, Berkshire, had served six months hard labour for poaching in his teens, and was illiterate until attending technical college, later running a bookshop. Lovelock was brought up a Quaker and imbued with the notion that "God is a still, small voice within rather than some mysterious old gentleman way out in the universe", which he thought was a helpful way of thinking for inventors, but he would eventually end up as being non-religious. The family moved to London, where his dislike of authority made him, by his own account, an unhappy pupil at Strand School in Tulse Hill, south London.Lovelock could not at first afford to go to university, something which he believed helped prevent him from becoming overspecialised and aided the development of Gaia theory.
Career
After leaving school Lovelock worked at a photography firm, attending Birkbeck College during the evenings, before being accepted to study chemistry at the University of Manchester, where he was a student of the Nobel Prize laureate professor Alexander R. Todd. Lovelock worked at a Quaker farm before a recommendation from his professor led to him taking up a Medical Research Council post, working on ways of shielding soldiers from burns. Lovelock refused to use the shaved and anaesthetised rabbits that were used as burn victims, and exposed his skin to heat radiation instead, an experience he describes as "exquisitely painful". His student status enabled temporary deferment of military service during the Second World War. Still, he registered as a conscientious objector. He later abandoned his conscientious objection in the light of Nazi atrocities and tried to enlist in the armed forces but was told that his medical research was too valuable for the enlistment to be approved.In 1948, Lovelock received a PhD degree at the London School of Hygiene and Tropical Medicine. He spent the next two decades working at London's National Institute for Medical Research. In the United States, he conducted research at Yale, Baylor College of Medicine and Harvard University Medical School.
In the mid-1950s, Lovelock experimented with the cryopreservation of rodents, determining that hamsters could be frozen and revived successfully. Hamsters were frozen with 60% of the water in the brain crystallised into ice with no adverse effects recorded. Other organs were shown to be susceptible to damage.
A lifelong inventor, Lovelock created and developed many scientific instruments, some of which were designed for NASA in its planetary exploration program. While working as a NASA consultant, Lovelock developed the Gaia hypothesis, for which he is most widely known.
In early 1961, Lovelock was engaged by NASA to develop sensitive instruments for the analysis of extraterrestrial atmospheres and planetary surfaces. The Viking program, which visited Mars in the late 1970s, was motivated in part to determine whether Mars supported life, and some of the sensors and experiments that were ultimately deployed aimed to resolve this issue. During work on a precursor of this program, Lovelock became interested in the composition of the Martian atmosphere, reasoning that many life forms on Mars would be obliged to make use of it. However, the atmosphere was found to be in a stable condition close to its chemical equilibrium, with very little oxygen, methane, or hydrogen, but with an overwhelming abundance of carbon dioxide. To Lovelock, the stark contrast between the Martian atmosphere and chemically dynamic mixture of the Earth's biosphere was strongly indicative of the absence of life on Mars. However, when they were finally launched to Mars, the Viking probes still searched for extant life there. Further experiments to search for life on Mars have been carried out by additional space probes, for instance, by NASA's Perseverance rover, which landed in 2021.
Lovelock invented the electron capture detector, which ultimately assisted in discoveries about the persistence of chlorofluorocarbons and their role in stratospheric ozone depletion. After studying the operation of the Earth's sulphur cycle, Lovelock and his colleagues, Robert Jay Charlson, Meinrat Andreae and Stephen G. Warren developed the CLAW hypothesis as a possible example of biological control of the Earth's climate.
Lovelock was elected a Fellow of the Royal Society in 1974. He served as the president of the Marine Biological Association from 1986 to 1990 and was an Honorary Visiting Fellow of Green Templeton College, Oxford from 1994.
As an independent scientist, inventor and author, Lovelock worked out of a barn-turned-laboratory he called his "experimental station" located in a wooded valley on the Devon–Cornwall border in South West England.
In 1988 he made an extended appearance on the Channel 4 television programme After Dark, alongside Heathcote Williams and Petra Kelly, among others.
On 8 May 2012, he appeared on the Radio Four series The Life Scientific, talking to Jim Al-Khalili about the Gaia hypothesis. On the programme, he mentioned how his ideas had been received by various people, including Jonathon Porritt. He also said how he had a claim for inventing the microwave oven. He later explained this claim in an interview with The Manchester Magazine. Lovelock said that he did create an instrument during his time studying causes of damage to living cells and tissue, which had, according to him, "almost everything you would expect in an ordinary microwave oven". He invented the instrument to heat frozen hamsters in a way that caused less suffering to the animals, as opposed to the traditional way, which involved putting red-hot spoons on the animals' chests to heat them. He believed that, at the time, nobody had gone that far and made an embodiment of an actual microwave oven. However, he did not claim to have been the first person to have the idea of using microwaves for cooking.
CFCs
After developing his electron capture detector, in the late 1960s, Lovelock was the first to detect the widespread presence of CFCs in the atmosphere. He found a concentration of 60 parts per trillion of CFC-11 over Ireland and, in a partially self-funded research expedition in 1972, went on to measure the concentration of CFC-11 from the northern hemisphere to the Antarctic aboard the research vessel. He found the gas in each of the 50 air samples that he collected but, not realising that the breakdown of CFCs in the stratosphere would release chlorine that posed a threat to the ozone layer, concluded that the level of CFCs constituted "no conceivable hazard". He later stated that he meant "no conceivable toxic hazard".However, the experiment did provide the first useful data on the ubiquitous presence of CFCs in the atmosphere. The damage caused to the ozone layer by the photolysis of CFCs was later discovered by Sherwood Rowland and Mario Molina. After hearing a lecture on the subject of Lovelock's results, they embarked on research that resulted in the first published paper that suggested a link between stratospheric CFCs and ozone depletion in 1974. Lovelock was sceptical of the CFC–ozone depletion hypothesis for several years, calling the US ban of CFCs as aerosol propellants in the late 1970s arbitrary overkill.
Gaia hypothesis
Drawing from the research of Alfred C. Redfield and G. Evelyn Hutchinson, Lovelock first formulated the Gaia hypothesis in the 1960s resulting from his work for NASA concerned with detecting life on Mars and his work with Royal Dutch Shell. The hypothesis proposes that living and non-living parts of the Earth form a complex interacting system that can be thought of as a single organism. Named after the Greek goddess Gaia at the suggestion of novelist William Golding, the hypothesis postulates that the biosphere has a regulatory effect on the Earth's environment that acts to sustain life.While the hypothesis was readily accepted by many in the environmentalist community, it has not been widely accepted within the scientific community as a whole. Among its most prominent critics were the evolutionary biologists Richard Dawkins, Ford Doolittle and Stephen Jay Gould, a convergence of opinion among a trio whose views on other scientific matters often diverged. These critics have questioned how natural selection operating on individual organisms can lead to the evolution of planetary-scale homeostasis.
In response to this, Lovelock, together with Andrew Watson, published the computer model Daisyworld in 1983, which postulated a hypothetical planet orbiting a star whose radiant energy is slowly increasing or decreasing. In the non-biological case, the temperature of this planet simply tracks the energy received from the star. However, in the biological case, ecological competition between "daisy" species with different albedo values produces a homeostatic effect on global temperature. When energy received from the star is low, black daisies proliferate since they absorb a greater fraction of the heat, but when energy input is high, white daisies predominate since they reflect excess heat. As the white and black daisies have contrary effects on the planet's overall albedo and temperature, changes in their relative populations stabilise the planet's climate and keep the temperature within an optimal range despite fluctuations in energy from the star. Lovelock argued that Daisyworld, although a parable, illustrates how conventional natural selection operating on individual organisms can still produce planetary-scale homeostasis.
In Lovelock's 2006 book, The Revenge of Gaia, he argued that the lack of respect humans have had for Gaia, through the damage done to rainforests and the reduction in planetary biodiversity, is testing Gaia's capacity to minimise the effects of the addition of greenhouse gases to the atmosphere. This eliminates the planet's negative feedbacks and increases the likelihood of homeostatic positive feedback potential associated with runaway global warming. Similarly, the warming of the oceans is extending the oceanic thermocline layer of tropical oceans into the Arctic and Antarctic waters, preventing the rise of oceanic nutrients into the surface waters and eliminating the algal blooms of phytoplankton on which oceanic food chains depend. As phytoplankton and forests are the main ways in which Gaia draws down greenhouse gases, particularly carbon dioxide, taking it out of the atmosphere, the elimination of this environmental buffering will see, according to Lovelock, most of the Earth becoming uninhabitable for humans and other life-forms by the middle of this century, with a massive extension of tropical deserts. In 2012, Lovelock distanced himself from these conclusions, saying he had "gone too far" in describing the consequences of climate change over the next century in this book.
In his 2009 book, The Vanishing Face of Gaia, he rejected scientific models that disagree with the findings that sea levels are rising and Arctic ice is melting faster than the models predict. He suggested that we may already have passed the tipping point of terrestrial climate resilience into a permanently hot state. Given these conditions, Lovelock expected that human civilisation would be hard-pressed to survive. He expected the change to be similar to the Paleocene–Eocene Thermal Maximum when the temperature of the Arctic Ocean was 23 °C.