Haigh conforms to the mainstream scientific view, that anthropogenic carbon emissions lead to increased greenhouse warming. She stated in June 2016 that if current levels of carbon dioxide emissions continued unabated, they would lead to a 5 °C increase over pre-industrial climate by the end of the next century, and that achieving a zero temperature rise would require a complete cessation of carbon emissions.[18] She also stated that she was optimistic about the future, following the COP21 conference,[18] but later, when Donald Trump became president of the United States, she said:
"If Trump does what he said he'd do, and others follow suit, my gut feeling is that I'm scared. Very scared."[19]
Distinguished for her scientific leadership in the area of solar influences on the middle atmosphere and for her modelling of how these effects can modulate tropospheric circulations and so propagate to Earth's surface. Her expertise in modelling atmospheric radiative transfer allowed the development of computationally fast but accurate radiative transfer schemes some of which are now in use by climate modelling groups across the world. By proposing and demonstrating an entirely novel mechanism for solar influence on climate she has allowed proper allowance to be made for the small and subtle, yet revealing effects.
In 2004 she received the Charles Chree Medal and Prize from the Institute of Physics and in 2010 the Royal Meteorological Society Adrian Gill prize for her work on solar variability and its effects on climate.[23]
^Larkin, Alice (2000). Investigation into the effects of solar variability on climate using atmospheric models of the troposphere and stratosphere (PhD thesis). Imperial College London. OCLC1006239909. EThOSuk.bl.ethos.310070.
^Haigh, J. D. (2003). "The effects of solar variability on the Earth's climate". Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences. 361 (1802): 95–111. Bibcode:2003RSPTA.361...95H. doi:10.1098/rsta.2002.1111. S2CID53007804.